Answer:
C
Explanation:
Spoon decrease, water increase
Final answer:
When a hot spoon is placed in cold water, the spoon's entropy decreases and the water's entropy increases as heat is transferred from the spoon to the water. So the correct option is C.
Explanation:
If a hot spoon is placed in a glass of cold water, the entropy of the molecules in the spoon decreases, and the entropy of the water molecules increases. This is because entropy can be thought of as the measure of disorder within a system. The hot spoon transfers heat to the colder water, resulting in a decrease in temperature and therefore a decrease in disorder of the spoon's molecules, leading to lower entropy. Conversely, the cold water gains heat, increasing the disorder of its molecules, thus increasing its entropy. So, the correct answer is (C) spoon decrease, water increase.
An automobile uses a braking force of 15000N to bring it to rest in 1.4s The mass of the automobile is 800kg. what is the impulse
The impulse on the car is -21,000 kg m/s
Explanation:
The impulse exerted on an object is the product between the force exerted on it and the time interval during which the force is applied:
[tex]I=F\Delta t[/tex]
where
I is the impulse
F is the force applied
[tex]\Delta t[/tex] is the time interval
For the car in this problem, we have
F = -15,000 N (the negative sign indicates that the direction of the force is opposite to the direction of motion)
[tex]\Delta t = 1.4 s[/tex] is the time interval
Therefore, the impulse on the car is
[tex]I=(-15000)(1.4)=-21,000 kg m/s[/tex]
And the negative sign indicates that the direction of the impulse is opposite to the direction of motion.
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liquid helium has a temperature of 4k what is the temperature on celsius and fahrenheit?
Answer:
a.—269°C
b. —452.2°F
Explanation:Please see attachment for explanation
Which of the following is a vector quantity?
O
A. 35.6 pounds at 3 years old
O
B. 25 gallons of water
O
C. 100 mph maximum
O
D. 30 m/s going west
?
Answer:
D
Explanation:
30ms-1 going west is vector quantity.
What is a vector quantity? It is a quantity that has both direction and magnitude.
In the first three options there is only magnitude, like weight age and things.
But the last one has both magnitude and direction.
Thank you. If u have any questions please let me know.
I hope u will follow me and make this the brainliest answer.
Scientists track _________________ to be able to predict geomagnetic storms and technological disturbances on Earth
A. sunspots and solar storms
B. coronal hot spots & magnetic flares
C. photospheric emissions
Answer:
A
Explanation:
What is one way to make a positive impact on air quality
to reduce air pollution?
Moving to a large city
using public transportation
planting crops in terraces
releasing gases into the air
Answer:
B
Explanation:
edge 2020
One way to make a positive impact on air quality to reduce air pollution is using public transportation which will reduce air pollution.
What is air quality?Air quality index is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become.
Limited number of diesel cars can be used to improve air quality because there will be limited number of cars to cause air pollution.
Thus, one way to make a positive impact on air quality to reduce air pollution is using public transportation which will reduce air pollution.
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the theory of gravity is considered to be a theory because
Answer:
Gravity is considered a theory because it is supported by extensive experimental evidence and has successfully predicted the behavior of objects in the universe.
Hope this helps you mate
What determines if an object will float or sink in a fluid?
A. Size
B. Mass
c. Weight
D. Density
Which of Newton's Three Laws Applies? Law 1, 2, or 3?
Pushing a cart down the hall, when you try to turn it it tries
to go straight.
More acceleration takes more force.
When you push your knuckles into a table, it hurts your knuckles.
A ball thrown into the ground bounces back up.
Answer:
1. Newton's first law
2.Newton's second law
3.Newton's third law
Explanation:
1. Newton's first law stated, In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force... this is base of the concept of inertia.
2. Newton's second law stated, In an inertial frame of reference, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration a of the object: F = ma, or in easier words, F is directly proportional to a.
3. Newton's third law stated, When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body., In this case, the Normal Are opposite with gravititional force.
The question is about applying Newton's Three Laws in different scenarios.
Explanation:The subject of this question is Physics and the grade level is High School. Let's analyze each statement to identify which of Newton's laws applies:
The first statement describes the concept of inertia, which is explained by Newton's First Law. When you try to turn the cart, it resists the change in motion and tries to go straight.The second statement relates to Newton's Second Law, which states that acceleration is directly proportional to the force applied. Therefore, more acceleration requires more force.The third statement is an example of Newton's Third Law. When you push your knuckles into a table, the table exerts an equal and opposite force, causing discomfort.The fourth statement is related to Newton's Third Law as well. When the ball hits the ground, the ground exerts an upward force, causing the ball to bounce back up.Learn more about Newton's Three Laws here:https://brainly.com/question/32539676
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What’s the difference between 40hz and 300hz
Answer:
40hz has less frequency of sound and 300hz has more frequency of sound which means 40hz has less crest and troughs , so it has less reachability thank 300hz.
Explanation:
Engineers have determined that the maximum safe speed around a
particular non-banked curve is 20 m/s. If the coefficient of friction
between the tires and the road is 0.703, what is the radius of the curve?
Answer:
58.1 m
Explanation:
Draw a free body diagram of the vehicle. There are three forces: normal force N pushing up, weight force mg pulling down, and friction force Nμ pushing towards the center of the circle.
Sum of forces in the y direction:
∑F = ma
N − mg = 0
N = mg
Sum of forces in the radial direction:
∑F = ma
Nμ = m v² / r
Substitute and solve for r:
mgμ = m v² / r
gμ = v² / r
r = v² / (gμ)
Plug in values:
r = (20 m/s)² / (9.8 m/s² × 0.703)
r = 58.1 m
Final answer:
The radius of the curve is approximately 129.9 meters.
Explanation:
In order to calculate the radius of the curve, we can use the formula for centripetal force:
Fc = μmg
Where Fc is the centripetal force, μm is the coefficient of friction, m is the mass of the vehicle, and g is the acceleration due to gravity.
Since the maximum safe speed is given as 20 m/s, we can calculate the maximum centripetal force using the equation:
Fc = mV2/R
Where V is the velocity and R is the radius.
Equating these two expressions for centripetal force, we get:
mV2/R = μmg
Substituting the given values, we have:
(20)2/R = (0.703)(9.8)
Simplifying, we find:
R = (20)2/((0.703)(9.8))
R ≈ 129.9
3. Why do elements in a group have similar properties?
Answer:
Elements belonging to the same periodic group reflects similar chemical properties because of the same number of valence electrons residing in their outermost orbits that reflect the same energy level.
Explanation:
Elements of a periodic group reflecting similar properties
We often observe that a specific group of elements reflect common characteristics towards other elements. This is because these elements have their valence electrons in the same energy levels.
This is the prime factor according to which elements are kept in a specific group in the periodic table. All elements in the group have the same number of valence electrons. These elements may have different number of electrons over all. Elements belonging to the same group shows the same chemical properties such as bonding with other elements, reacting to other substances etc.
Elements in the same group on the periodic table have similar properties because they have the same number and distribution of valence electrons. This affects how they behave chemically, as represented by the similarities within groups such as the alkali metals and the halogens.
Explanation:Elements in a group on the periodic table exhibit similar properties due to their similar electron configuration. That is, they all have the same number and distribution of electrons in their valence shells. This shared trait influences how these elements behave chemically. For instance, in Group 1 (the alkali metals), elements like lithium and sodium each have only one valence electron, which makes them highly reactive. Similarly, elements in Group 17 (the halogens) like fluorine and chlorine each have seven valence electrons, making them also very reactive, but in a different way than Group 1 elements. The nature of these group similarities underpins the principle of the periodic table and helps predict how different elements are likely to react.
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An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to the right.
The displacement of the object is
Answer: B. 5
Explanation: the right of 0 on a horizontal number line is positive, and then to the left to 0, is negative. So, 3 units to the right is 3, and then 4 units to the left (3 - 4 = -1), then, 6 units to the right (-1 + 6 = 5).
Hope this helped. :)
Motion is a change in ____.
Motion is a change in position.
Explanation:If one object A changes its position with reference to an object B positioned at a fixed place (Reference point), Object A is said to be in motion. This change in position is caused due to different parameters.
The rate at which an object changes its position is termed as speed. Velocity is a vector quantity that measures both the speed of the object and its direction. Acceleration is the rate of change in velocity. Distance is the total path-length of the object performing motion. Displacement is the shortest distance between two points of motion path ( the difference between final position and initial position) and it is a vector quantity. If an object changes its position, it is said to be in motion.
Motion in physics is defined as the change in position of an object with respect to its surroundings in a given period of time. Therefore, when a vehicle moves down a street or a person walks across a room, they are exhibiting motion by changing position.
Explanation:Motion refers to a change in position of an object with respect to its surroundings in a given period of time. The concept of motion is fundamental in physics and is part of the wider study of physical science. A simple example of motion would an object changing its physical location from point A to point B, thus altering its position.
For instance, if you observe a car moving down the street, you can see that the car's position relative to structures such as buildings and trees changes. This changing displacement over time means the car is in motion.
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how long must a current of 100mA flow so as to transfer a charge of 80 C?
Answer:
800s
Explanation:
Q=It
where,
Q=80c
I =100MA=0.1A
t=?
Q=It
800=0.1×t
t=80×0.1
t=800s
Answer:
800 secs
Explanation:
Q = it
80 = 100 x10^-3 t
t = 80/0.1
= 800secs
Two curling stones collide on an ice rink. Stone 1 has a mass of 16 kg
and an initial velocity of 1.5 m/s to the north. Stone 2 was at rest
initially. The stones collide dead center, giving stone 2 a final velocity
of 0.69 m/s to the north.
Final Answer:
a. The mass of stone 2 is 24 kg. b. The final velocity of stone 1 is 0.82 m/s to the north.
Explanation:
We can solve this problem using the principle of conservation of momentum and the principle of conservation of kinetic energy for elastic collisions.
1. Conservation of momentum:
Before collision: [tex]\( m_1 v_{1i} + m_2 v_{2i} = m_1 v_{1f} + m_2 v_{2f} \)[/tex]
After collision: [tex]\( m_1 v_{1f} + m_2 v_{2f} \)[/tex]
2. Conservation of kinetic energy:
Before collision: [tex]\( \frac{1}{2} m_1 v_{1i}^2 + \frac{1}{2} m_2 v_{2i}^2 = \frac{1}{2} m_1 v_{1f}^2 + \frac{1}{2} m_2 v_{2f}^2 \)[/tex]
Using the given values and the fact that stone 2 was initially at rest [tex](\( v_{2i} = 0 \))[/tex], we can solve for the mass of stone 2 (part a) and the final velocity of stone 1 (part b).
a. Solving for the mass of stone 2:
From the conservation of momentum equation, we have:
[tex]\( m_1 v_{1i} = m_1 v_{1f} + m_2 v_{2f} \)[/tex]
Substituting the given values and solving for [tex]\( m_2 \)[/tex], we find [tex]\( m_2 = 24 \, \text{kg} \)[/tex].
b. Solving for the final velocity of stone 1:
From the conservation of kinetic energy equation, we have:
[tex]\( \frac{1}{2} m_1 v_{1i}^2 = \frac{1}{2} m_1 v_{1f}^2 + \frac{1}{2} m_2 v_{2f}^2 \)[/tex]
Substituting the given values and the calculated mass of stone 2, we can solve for [tex]\( v_{1f} \)[/tex], which is approximately [tex]\( 0.82 \, \text{m/s} \)[/tex].
Therefore, the mass of stone 2 is 24 kg and the final velocity of stone 1 is 0.82 m/s to the north.
The mass of stone 2 and the final velocity of stone 1, obtained using the law of conservation of momentum and the law of conservation of energy are;
Mass of stone 2, m₂ ≈ 53.56
The final velocity of stone 1, v₁' ≈ 0.81 m/s south
The steps used to find the above values are as follows;
The mass of stone 1, m₁ = 16 kg
Initial velocity of stone 1, v₁ = 1.5 m/s
Mass of stone 2, m₂; Required
The law of conservation of linear momentum indicates that we get;
m₁·v₂ + m₂·v₂ = m₁·v₁' + m₂·v₂'
The law of conservation of energy indicates that we get;
m₁·v₁²/2 + m₂·v₂²/2 = m₁·v'₁²/2 + m₂·v'₂²/2
Therefore;
16 × 1.5 = 16·v₁' + 0.69·m₂
24 = 16·v₁' + 0.69·m₂,,,(1)
16 × 1.5²/2 = 16 × v'₁²/2 + m₂·0.69²/2
18 = 8·v'₁² + 0.23805·m₂...(2)
Equation (1) indicates that we get;
v₁' = (24 - 0.69·m₂)/16
Therefore;
18 = 8·v'₁² + 0.23805·m₂
18 = 8·((24 - 0.69·m₂)/16)² + 0.23805·m₂
18 = -0.01488·m₂² + 0.79695·m₂ + 18
-0.01488·m₂² + 0.79695·m₂ = 0
0.79695/0.01488
m₂ = 0 and m₂ ≈ 53.56
v₁' = (24 - 0.69·m₂)/16, therefore;
v₁' = (24 - 0.69 × 54.)/16
(24 - 0.69 × 53.56)/16 ≈ -0.81
The final velocity of ball 1 is v₁² ≈ 0.81 m/s so the south
The complete question obtained from a similar question found through search is as follows;
Two curling stones collide on an ice ringk.Stone 1 has a mass of 16 kg and an initial velocity of 1.5 m/s to the north. Stone 2 was at rest initially. The stones collide dead center giving stone 2 a final velocity of 0.69 m/s to the north. Find the mass of stone 2 and the final velocity of stone 1
The table below shows the average wind speeds of four hurricanes in Florida. Florida Hurricanes Hurricane | Average Wind Speed (miles per hour)|
A | 160|
B | 95|
C | 140|
D | 103|
Which hurricane most likely caused the greatest damage?
Hurricane A Hurricane B Hurricane C Hurricane D
Answer:
The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 rating based on a hurricane's sustained wind speed. This scale estimates potential property damage. Hurricanes reaching Category 3 and higher are considered major hurricanes because of their potential for significant loss of life and damage. Category 1 and 2 storms are still dangerous, however, and require preventative measures. In the western North Pacific, the term "super typhoon" is used for tropical cyclones with sustained winds exceeding 150 mph. Note that all winds are using the U.S. 1-minute average.
Category One Hurricane
Winds 74-95 mph (64-82 kt or 119-153 km/hr). Very dangerous winds will produce some damage: Well-constructed frame homes could have damage to roof, shingles, vinyl siding and gutters. Large branches of trees will snap and shallowly rooted trees may be toppled. Extensive damage to power lines and poles likely will result in power outages that could last a few to several days. Irene of 1999, Katrina of 2005, and several others were Category One hurricanes at landfall in South Florida.
Category Two Hurricane
Winds 96-110 mph (83-95 kt or 154-177 km/hr). Extremely dangerous winds will cause extensive damage: Well-constructed frame homes could sustain major roof and siding damage. Many shallowly rooted trees will be snapped or uprooted and block numerous roads. Near-total power loss is expected with outages that could last from several days to weeks. Frances of 2004 was a Category Two when it hit just north of Palm Beach County, along with at least 10 other hurricanes which have struck South Florida since 1894.
Category Three Hurricane
Winds 111-129 mph (96-112 kt or 178-208 km/hr). Devastating damage will occur: Well-built framed homes may incur major damage or removal of roof decking and gable ends. Many trees will be snapped or uprooted, blocking numerous roads. Electricity and water will be unavailable for several days to weeks after the storm passes. Unnamed hurricanes of 1909, 1910, 1929, 1933, 1945, and 1949 were all Category 3 storms when they struck South Florida, as were King of 1950, Betsy of 1965, Jeanne of 2004, and Irma of 2017.
Category Four Hurricane
Winds 130-156 mph (113-136 kt or 209-251 km/hr). Catastrophic damage will occur: Well-built framed homes can sustain severe damage with loss of most of the roof structure and/or some exterior walls. Most trees will be snapped or uprooted and power poles downed. Fallen trees and power poles will isolate residential areas. Power outages will last weeks to possibly months. Most of the area will be uninhabitable for weeks or months. The 1888, 1900, 1919, 1926 Great Miami, 1928 Lake Okeechobee/Palm Beach, 1947, Donna of 1960 made landfall in South Florida as Category Four hurricanes.
Final answer:
Hurricane A most likely caused the greatest damage as it is categorized as a Category 5 hurricane with wind speeds exceeding 155 mph, known for catastrophic impact.
Explanation:
Based on the data provided, Hurricane A, with an average wind speed of 160 miles per hour, most likely caused the greatest damage. According to the Saffir-Simpson Hurricane Scale, Hurricane A's wind speed places it as a Category 5 hurricane. Category 5 hurricanes have sustained winds of more than 155 miles per hour and are known for catastrophic damage, including destroying buildings, roofs, and structures, as well as uprooting trees and shrubs. As such, the hurricane with the highest wind speeds is usually expected to cause the most severe destruction. This is further supported by the fact that the power of a hurricane scales as the cube of wind velocity, and given that velocities exceed 50 m/s (approximately 110 mph), the intensity and potential for destruction grows significantly with increases in wind speed.
What is another way of saying “getting the smallest possible force”?
Answer:
MOMENTUM
Explanation:
another way of saying getting the smallest force possible is the word " MOMENTUM".
momentum is the ability to keep maintaining,incresing or itself developing to move at constant speed or to increase the speed.
A student walks 144 m west, and then turns around and walks 89 m east If this takes place in a 7.5-minute interval, what is the student's average velocity in meters
second? What is the student's average speed?
The average speed is 0.517 m/s
The average velocity is 0.12 m/s west
Explanation:
When dividing the total distance covered by object by time, we get the value for average speed.
[tex]\text { speed }=\frac{\text {distance}}{\text {time}}[/tex]
Calculate the distance without consideration of motion’s direction. So, the distance walks 144 m first, and then another 89 m, so the total distance covered is
d = 144 + 89 = 233 meters
Given t = 7.5 minutes. Convert minute into seconds,
[tex]7.5 \times 60=450 \text { seconds }[/tex]
So, the average speed can be calculates as below,
[tex]\text { speed }=\frac{233}{450}=0.517 \mathrm{m} / \mathrm{s}[/tex]
When dividing the object’s displacement by time taken, we can calculate average velocity.
[tex]\text {velocity}=\frac{\text {displacement}}{\text {time}}[/tex]
In given case, the students walks 144 m west first, and then 89 m east. The displacement is the distance in a straight line between the initial and final position: therefore, in this case, the displacement is
d = 144 (west) - 89 (east) = 55 m (west)
The time taken is t = 450 s
So, the average velocity is
[tex]\text {velocity}=\frac{55}{450}=0.12 \mathrm{m} / \mathrm{s}[/tex]
And the direction is west (the same as the displacement).
As a bike accelerates from rest, it gains
Answer:
kenetic energy
When you arent moving something its called potential enegy when its moving it changes into kinetic energy
Answer:
momentum, speed, velocity, and kinetic energy
Explanation:
Explain why squeezing a plastic mustard bottle forces mustard out to top.
Answer:
because when squeezing you are increasing pressure within the bottle and there is less pressure on the outside
Answer:
Because u r using force to push out the mustard in the bottle.
Explanation:
suppose that a new miracle pills allows a person to function with pmly one hour of sleep per night
Complete Question: Suppose that a new “miracle pill” is on the market that will allow a person to function with only one hour of sleep each night. However, because a night’s sleep is so short, a person who takes the pill will never dream again. Knowing what you do about the functions of sleep and dreaming, what would be some advantages and drawbacks of such a pill from a personal standpoint? Would you take such a pill?
Answer:
If the miracle pills are available in the drug stores and approachable to anyone who wants to shorten their sleep time and eliminates dreaming during sleep certainly has some consequences upon them. The following are the advantages and disadvantages of those consequences.
Advantages of miracle pills:
Those who take miracle pills are more productive and efficient than other because they take less hours for sleep. As they take less hours for sleep it means they have more hours available for work. And if they have more hours, they certainly do more work.Those who do not dream due to miracle pills have more realistic approach towards life. Those who consume miracle pills will be more focused to the details than those who do not.Disadvantages of miracle pills:
As human body is designed in the specific way, it is mention that how much amount of sleep is sufficient for certain age group. By going against nature, less sleep due to miracle pills may results in stress in the individuals. Those who take miracles pills have more health issues then those who do not.Due to excessive work body muscles tend to become sore and stretched. which may also cause serious conditions later on.Due to artificial way of taking less sleep mental capability become limited. A person become less creative in ideas because their emotions and actions are forced by external factors and by their own thinking and judgement. No dreaming, makes anyone thoughts bounded as they are unable to predict future and to see their pasts, and they are only limited to face the present situations will make them less aware of the world around them.My Opinion about miracle pills:
In my opinion, I will surely not be taking those pills which lessen my sleep artificially. As they have some major outfalls on person mental and physical health, I will not use miracle pills to shorten by sleep. Because taking a sufficient amount of sleep is necessary for a healthy body and a sound mind.
A toy car is moving along with 0.40 joules of kinetic energy if it’s speed is double then it’s new kinetic energy will be ?
Answer: .8
Explanation: because .40×2 =.8
If the speed of the toy car is doubled, its new kinetic energy will be 1.6J
Kinetic energy is the energy an object possesses as a result of its motion. It is given by:
Kinetic energy = (1/2) * mass(m) * velocity(v)²
Given a kinetic energy of 0.4 joules, hence:
(1/2)mv² = 0.4
If the speed is doubled:
K.E = (1/2)m(2v)² = 4 * (1/2)mv² = 4 * 0.4 = 1.6J
If the speed of the toy car is doubled, its new kinetic energy will be 1.6J
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Normally the rate at which you expend energy
during a brisk walk is 3.5 Calories per minute.
(A Calorie is the common unit of food energy,
equal to 4184.1 Joules.)
How long do you have to walk in order to
produce the same amount of energy as in a
candy bar (approximately 280 Cal)?
Answer in units of min.
please help
Based on the calculations, you would have to walk for 80 minutes to expend the same amount of energy.
Given the following data:
Rate of energy = 3.5 Calories per minute.1 Calorie = 4184.1 Joules.Candy bar energy = 280 Calories.How to calculate the time.Mathematically, the rate of energy expended with respect to time is given by this formula:
[tex]Rate = \frac{Energy}{time}[/tex]
Making time the subject of formula, we have:
[tex]Time = \frac{Energy}{Rate}[/tex]
Substituting the given parameters into the formula, we have;
[tex]Time = \frac{280}{3.5}[/tex]
Time = 80 minutes.
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To produce the same amount of energy as in a candy bar, you would need to walk for 80 minutes at a rate of 3.5 Calories per minute.
Explanation:To calculate the time it would take to produce the same amount of energy as in a candy bar, we can use the equation:
Energy = Power x Time
Given that the rate at which energy is expended during a brisk walk is 3.5 Calories per minute and the energy in a candy bar is approximately 280 Cal, we can rearrange the equation to solve for Time:
Time = Energy / Power
Substituting the given values, we have:
Time = 280 Cal / 3.5 Cal/min = 80 min
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What type of energy is formed when an object encounters friction?
Answer:
thermal energy
Friction does negative work and removes some of the energy the person expends and converts it to thermal energy. The net work equals the sum of the work done by each individual force. The forces acting on the package are gravity, the normal force, the force of friction, and the applied force.
Explanation:
Answer:
Explanation:
Thermal energy due to heat coming in from rubbing like rubbing your hand and it feel warm
A student is studying the fossils of a plant species that lived several million years ago. The fossils of this species are found in Australia and Antarctica.Which statement is the MOST LIKELY explanation for why fossils of this plant are found on these two continents? *
Answer:
B. Australia and Antarctica were a single landmass in the past.
Explanation:
Just trust me ; )
How much momentum does a 5 kg bowling ball have when its traveling at a velocity of 8 m/s? Question 6 options: 40 kg*m/s 0.625 kg*m/s 3 kg*m/s 1.6 kg*m/s
Answer:
The momentum of the bowling ball is 40 kg m/s.
Explanation:
Momentum is defined as the product of mass and velocity acting on that object. So it is a measure of the change in the velocity for the given force with the mass of the object.
Momentum = Mass × Velocity.
As the mass of the object is given as 5 kg and the velocity is given as 8 m/s, then the momentum will be
Momentum = 5 kg × 8 m/s = 40 kg m/s.
So, the momentum of the bowling ball is 40 kg m/s.
.
has
p(x) = 2x3 – 3x2-mx-6
1. The polynomial function has x-2
as one of its factors. What is the value of m?
The value of m = - 1.
Explanation:
An expression which contains two or more algebraic terms is called the polynomial. It is made up of two terms namely Poly and Nominal meaning many terms.
P(x) = 2x^3 - 3x^2 - mx - 6
x - 2 is one of the factor of the polynomial.
So x - 2 = 0
x = 2
Substituting the value of x,
P(2) = 2(2)^3 - 3(2)^2 - m(2) - 6
2(8) - 3(4) - m(2) - 6 = 0
16 - 12 - 2m - 6 = 0
- 2 - 2m = 0
- 2m = 2
m = - 1
You want to prevent charges from moving off of a charged metal sphere.
Which statement accurately describes the material you need?
O
A. It has a low resistance and is a conductor.
O
B. It has a high resistance and is an insulator.
O
C. It has a low resistance and is an insulator.
O
D. It has a high resistance and is a conductor.
B. It has a high resistance and is an insulator.
Explanation:
To prevent charges from moving off of a charged metal sphere, it is best to use a material with a high resistance and is an insulator.
An insulator is a substance that does not allow electric charges and currents to move through. A material of high resistance retar/ds the flow of electricity. An insulator is therefore a material with a very high resistance. This will not allow electric current to pass through. To prevent movement of charges, we thereby use insulators. Conductors on the other hand are materials that allows electric charges to pass through. They generally have low resistance.learn more:
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Answer: it has a high resistance and is an insulator
Explanation:
Compounds are created when atoms of different elements _____. form physical bonds have different chemical properties form chemical bonds have similar chemical properties
Compounds are created when atoms of different elements form chemical bonds. The chemical bond is a result of atoms sharing or exchanging electrons to fulfill the Octet Rule for stability. An example is water, where oxygen and hydrogen atoms bond together.
Explanation:Compounds are created when atoms of different elements form chemical bonds. Chemical bonds are formed when atoms share, donate (lose), or accept (gain) electrons. This happens in order to fulfill the 'Octet Rule', which states that atoms are most stable when their outermost (valence) electron shell is full, typically with eight electrons except a few exceptions.
For example, in the formation of water (H2O), one oxygen atom forms a chemical bond with two hydrogen atoms. The oxygen atom achieves a stable electron configuration by sharing electrons with hydrogen atoms, which also reach a stable state.
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Compounds are created when atoms of different elements form chemical bonds during chemical reactions, leading to the formation of substances with unique properties.
Compounds are created when atoms of different elements form chemical bonds. Atoms combine to form molecules because they experience an attractive force that results in chemical bonds. There are various types of chemical bonds, such as polar covalent bond, hydrogen bond, non-polar covalent bond, and ionic bond. Chemical reactions facilitate the formation of compounds, where the initial substances reorganize their atomic arrangements, breaking existing bonds and forming new ones to create substances with unique properties.
A compound consists of atoms of two or more elements combined in a fixed, small whole-number ratio. For example, water consists of hydrogen and oxygen in a 2:1 ratio, represented by the empirical formula H2O, and table salt is made up of sodium and chlorine in a 1:1 ratio, represented by the empirical formula NaCl.
It is important to understand that compounds have their own unique chemical and physical properties—different from those of the elements that form them. The atoms in a compound are not created or destroyed during a chemical reaction, but are rearranged, resulting in a substance that is different from the original reactants.
This graph indicates that the kinetic energy of an object is increasing. What is the most reasonable explanation for this observation?
A) The object's mass has doubled.
B) The object's velocity doubled.
C) The object's velocity has quadrupled.
D) The object's velocity and mass doubled.
B) The object's velocity doubled.
Explanation:
The graph is missing: find it in attachment.
The kinetic energy of an object is the energy possessed by the object due to its motion. It is calculated as
[tex]K=\frac{1}{2}mv^2[/tex]
where
m is the mass of the object
v is the velocity of the object
We notice that:
The kinetic energy is directly proportional to the massThe kinetic energy is proportional to the square of the velocityIn the graph, one of the two quantities (either mass or speed) is represented on the x-axis, while the quantity on the y-axis is the kinetic energy.
First of all, we notice that the relationship is not linear: this means that the quantity on the x-axis cannot be the mass, so it must be the velocity.
Moreover, we notice that when the quantity on the x-axis increases from 1 to 2 (so, it doubles), the kinetic energy increases by a factor of 4. This means that the object's velocity has doubled, therefore
B) The object's velocity doubled.
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Final answer:
Kinetic energy is proportional to mass and the square of velocity. A quadrupling of velocity would result in a sixteen-fold increase in kinetic energy, making it the most substantial change among the given scenarios. Option B) The object's velocity doubled is the correct choice.
Explanation:
When observing that the kinetic energy of an object is increasing, it's important to consider the relationship between mass, velocity, and kinetic energy. The kinetic energy (KE) of an object is given by the equation KE = ½ mv², which tells us that kinetic energy is proportional to the mass of the object (m) and to the square of its velocity (v). Therefore, if the velocity doubles, the kinetic energy would not merely double but increase by a factor of four (since ² = 2² = 4). Doubling both mass and velocity would increase the kinetic energy by a factor of eight (since 2 * 4 = 8). Given the options, the object's velocity doubling would certainly increase the kinetic energy, but for the most significant increase, the most reasonable explanation would be that the object's velocity quadrupled, which would directly increase the kinetic energy by a factor of sixteen.² (since 4² = 16).