Answer:
The hiker followed a road heading north for 2 miles in 30 minutes.
Explanation:
In order to describe the motion of an object, distance covered and time taken must be required. The total path covered by an object is called the distance travelled.
The hiker followed a road heading north for 2 miles in 30 minutes. This describes the motion of hiker. The motion shows how fast the hiker is moving.
Distance, d = 2 miles = 3218.6 m
times, t = 30 minutes = 1800 seconds
So, we can say that the hiker is moving with a speed of 1.78 m/s in north direction.
Hence, this is the required solution.
Answer:
In this case in option 4:
The hiker followed a northbound road for 2 miles in 30 minutes.
Explanation:
Hello ! Let's solve this!
To know the description of a movement we have to know the distance it travels and the time it takes to travel it.
In this case in option 4:
The hiker followed a northbound road for 2 miles in 30 minutes.
Distance: 2 miles
time: 30min
Then we can calculate the speed of the hiker
Suppose that a constant force is applied to an object. Newton's Second Law of Motion states that the acceleration of the object varies inversely with its mass. A certain force acting upon an object with mass 2kg produces an acceleration of 10ms^2 . If the same force acts upon another object whose mass is 5kg , what would this object's acceleration be?
Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are below.
1. The stream of electrically charged particles collide with gas atoms, causing the latter to give off light.
2. The electrically charged particles flow outward in all directions as far as Saturn.
3. The stream of electrically charged particles flows outward from the corona.
4. The particles of the solar wind flow along lines of the magnetic field.
Which shows the correct sequence in the formation of solar winds?
Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are given then the correct sequence in the formation of solar winds would be 3 ⇒2⇒4⇒1.
What is solar energy?The energy transferred from the Sun in the form of electromagnetic radiation is known as the solar energy
It can be used as thermal energy for various life purposes as well as for electricity conversion with the help of solar photovoltaic cells,
As given in the problem Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are below
1. The stream of electrically charged particles collides with gas atoms, causing the latter to give off light.
2. The electrically charged particles flow outward in all directions as far as Saturn.
3. The stream of electrically charged particles flows outward from the corona.
4. The particles of the solar wind flow along lines of the magnetic field.
Thus, the correct sequence in the formation of solar winds would be 3 ⇒2⇒4⇒1.
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A runner went from 6 m/s to 2 m/s in 2 seconds, what was the acceleration?
The runner's acceleration is -2 m/s², indicating deceleration at a rate of 2 meters per second squared over a period of 2 seconds.
The acceleration of a runner who goes from 6 m/s to 2 m/s in 2 seconds can be calculated using the formula for acceleration which is Δv/Δt, where Δv is the change in velocity and Δt is the change in time. In this case, Δv = final velocity - initial velocity = 2 m/s - 6 m/s = -4 m/s (the negative sign indicates deceleration). The time interval Δt is 2 seconds. Thus, acceleration a is calculated as:
a = Δv/Δt = (-4 m/s)/2 s = -2 m/s².
This indicates that the runner is decelerating at a rate of 2 meters per second squared.
Suppose the initial position of an object is zero, and the object moves with constant acceleration. Which part of a velocity vs. time graph can be used to calculate the displacement of the object?
By definition, we have that the displacement of the object is given by:
[tex] r = \int\limits^t_0 {v} \, dt [/tex]
Where,
v: object velocity
dt: time differential
Therefore, since the integral of a function is the area under the curve of the function, then in a graph of velocity vs time, we have that the displacement is:
The area under the curve of the velocity vs. time graph.
Answer:
to calculate the displacement of the object we have to calculate:
The area under the curve of the velocity vs. time graph.
A syrup added to an empty container with a mass of 115.25g . When 0.100 pint of syrup is added, the total mass of the container and syrup is 182.48g. Determine the density ...?
Final answer:
To find the density of syrup added to a container, we subtract the empty container's mass from the total mass to get the syrup's mass, convert the pint volume to mL, and divide the mass by the volume, resulting in a syrup density of 1.42 g/mL.
Explanation:
The question involves determining the density of syrup by first finding the mass of the syrup alone and then using its volume in pints. The mass of the empty container is given as 115.25 g, and the total mass of the container with syrup is 182.48 g.
To find the mass of the syrup alone, we subtract the mass of the container from the total mass, which gives us 67.23 g of syrup. To convert 0.100 pint to milliliters (mL), we use the conversion rate (1 pint = 473.176 mL), resulting in 47.3176 mL of syrup. Density is mass divided by volume, hence we divide 67.23 g by 47.3176 mL to get the density of the syrup.
Density calculation:
Mass of syrup = 182.48 g - 115.25 g = 67.23 gVolume of syrup (in mL) = 0.100 pint * 473.176 mL/pint = 47.3176 mLDensity of syrup = Mass / Volume = 67.23 g / 47.3176 mL = 1.42 g/mLTherefore, the density of the syrup is 1.42 g/mL.
Car 1 drives 20 mph to the south, and car 2 drives 30 mph to the north. From the frame of reference of car 1, what is the velocity of car 2?
The velocity of car 2 from the frame of reference of car 1 will be 10 mph.
What is velocity?The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
The given data in the problem is
The velocity of car 1, V₁ = 20 mph south
The velocity of car 2, V₂ = 30 mph north
From the frame of reference of car 1, the velocity of car 2 will be V₁₂
From the frame of reference of car 1, the velocity of car 2 will be;
V₁₂=V₂ - V₁
V₁₂= 30 mph - 20 mph
V₁₂= 10 mph
Hence, the velocity of car 2 from the frame of reference of car 1 will be 10 mph.
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What happens to an iron bar when it is placed within the coils of a solenoid
it becomes a magnet.
Explanation;When an iron bar is placed within the coils of a solenoid it becomes a magnet. This type of a magnet is called an electromagnet.An electromagnet is made by placing a ferromagnetic material such as iron in a solenoid of a closed circuit. Electromagnets are used in all kinds of electric devices including hard disk drives, generators, motors, etc.the point upon which a lever turns (rotates) is called a
a) wedge
b)fulcrum
c)arm
d)inclined plane
The bending of wave crests as the reach shallow water is:
The bending of wave crests as they reach shallow water is called refraction, occurring alongside shoaling, which results in increased wave heights. Refraction is caused by the variation in wave speed due to different water depths. When waves become too tall relative to their wavelength, they break, often curling forward.
The bending of wave crests as they reach shallow water is known as refraction. This phenomenon occurs because different segments of the wave crest experience changes in wave speed due to the varying depths of water they encounter. The sections of a wave crest in deeper water travel faster compared to those in shallower water, causing the wave to bend and tend to align more parallel to the shoreline. As waves reach shallow water, there is also an increase in wave height due to the shoaling effect, where the energy of the wave is compressed into a smaller volume of water. The process of waves becoming more asymmetric and experiencing changes in their crest and trough structure is a result of both shoaling and refraction.
Moreover, when a wave 'touches bottom' in shallow water, the friction causes the wave to slow down and the wavelength to decrease while the wave height increases. When the wave height becomes too high relative to the wavelength, the wave becomes unstable and forms a breaker. The top part of the wave moves faster than the bottom, due to less friction encountered by the seafloor, often resulting in a forward curling motion as the wave breaks.
A physicist found that a force of 0.72N was measured between two charged sphere. The distance between the sphere was 0.90 m. Calculate the force between the two sphere when the distance was decreased to 0.50 m.
Answer:
New force, F' = 2.33 N
Explanation:
It is given that,
A physicist found that a force of 0.72 N was measured between two charged sphere.
The distance between the spheres was, d = 0.9 m
We have to find the force between the two sphere when the distance was decreased to d' = 0.5 m
The force acting between two charged particles is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]
i.e. F is inversely proportional to the square of distance between the charges. Let F' is the force when distance is decreased.
So, [tex]\dfrac{F}{F'}=(\dfrac{d'}{d})^2[/tex]
[tex]\dfrac{0.72}{F'}=(\dfrac{0.5}{0.9})^2[/tex]
On solving, we get : F' = 2.33 N
Hence, on decreasing distance the force between the charges increases.
A red train traveling at 72 km/hr and a green train traveling at 144 km/hr are headed toward one another along a straight level track. When they are 950 meters apart, each enginneer sees the other's train and applies the brakes. The brakes decelerate each train at the rate of 2.0 m/s^2. Is there a colllision? If so, what is the speed of each train at impact? If not, what is the separtion between the trains when they stop?
A 2.0-kilogram body is initially traveling at a velocity of 40. meters per second east.
If a constant force of 10. newtons due east is applied to the body for 5.0 seconds, the final speed of the body is ...?
The find the final speed of the 2.0-kilogram body is 65 m/s towards east.
To find the final speed of a 2.0-kilogram body initially traveling at 40 meters per second east, we will use the following physics concepts:
Newton's Second Law of Motion: F = ma, where F is the force, m is the mass, and a is the acceleration.
Kinematic Equation: vf = vi + at, where vf is the final velocity, vi is the initial velocity, a is the acceleration, and t is the time.
Step 1: Calculate the acceleration.
Using F = ma, we can solve for a:
F = 10 N
m = 2.0 kg
So, a = F/m = 10 N / 2.0 kg = 5 m/s²
Step 2: Calculate the final velocity using the kinematic equation.
Initial velocity, v_i = 40 m/s
Acceleration, a = 5 m/s²
Time, t = 5 s
So, vf = vi + at
[tex]v_f = 40 \, \text{m/s} + (5 \, \text{m/s}^2 \times 5 \, \text{s}) = 40 \, \text{m/s} + 25 \, \text{m/s} = 65 \, \text{m/s}[/tex]
Therefore, the final speed of the body is 65 meters per second east.
In order for an object to accelerate, what must be applied?
Explanation:
According to Newton's second law of motion, the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Mathematically, Force = mass × acceleration
or, Acceleration = [tex]\frac{Force}{mass}[/tex]
Thus, we can conclude that in order to accelerate an object, force must be applied. The object will accelerate in the direction in which force is applied.
In order for an object to accelerate, a net force must be applied to it. The net force determines the resulting acceleration of the object. The net force may come from various sources.
According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass
F = m × a,
If an object experiences a net force, it will undergo acceleration in the direction of the net force. Acceleration is the rate of change of velocity, so the object will either speed up, slow down or change direction.
The net force required to accelerate an object may come from various sources, such as applied forces, gravitational forces, frictional forces, or any other force acting on the object. The net force determines the resulting acceleration of the object.
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Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The specific heat capacity of copper is 0.09 cal/g°C, and the specific heat capacity of aluminum is 0.22 cal/g°C. Which of the following statements is true?
a. The temperature of each sample increases by the same amount.
b. The aluminum will get hotter than the copper.
c. The copper will get hotter than the aluminum.
d. The temperature of each sample decreases by the same amount
m₁ = mass of sample of copper = m₂ = mass of sample of aluminum = 5 g
T = initial temperature of copper = initial temperature of aluminum
T₁ = final temperature of copper
T₂ = final temperature of aluminum
c₁ = specific heat of copper = 0.09 cal/g°C
c₂ = specific heat of aluminum = 0.22 cal/g°C
Since both receive same amount of heat, hence
Q₁ = Q₂
m₁ c₁ (T₁ - T) = m₂ c₂ (T₂ - T)
(5) (0.09) (T₁ - T) = (5) (0.22) (T₂ - T)
T₁ - T = (2.44) (T₂ - T)
Change in temperature of copper = (2.44) change in temperature of aluminum
hence the correct choice is
c. The copper will get hotter than the aluminum.
Answer: c. The copper will get hotter than the aluminum.
Explanation: Specific heat capacity of a substance is the amount of heat required to raise the temperature of 1 gram of water through [tex]1^0C[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T[/tex]
m= mass
c = specific heat
[tex]\Delta T[/tex] = change in temperature
Given : [tex]Q_{Cu}=Q_{Al}[/tex]
mass of copper = mass of Aluminium= 5 g
[tex]c_{Cu}\times \Delta T_{Cu}=c_{Al}\times \Delta T_{Al}[/tex]
Now put all the given values , we get
[tex]0.09\times \Delta T_{Cu}=0.22\times \Delta T_{Al}[/tex]
Thus as specific heat capacity of copper is less, the temperature change will be more as they both are at same initial temperature.
How many degrees of latitude is one nautical mile?
1.0
0.1
6
fraction: 1 over 60
What term best describes the geologic event taking place in the above illustration?
A.
plate convergence
B.
erosion
C.
weathering
D.
seafloor spreading
Answer:
sea floor spreading
Explanation:
I got it right on studyisland
The term that best describes the geologic event taking place in the above illustration is seafloor spreading. The correct option is D.
What is seafloor spreading?The magma forces itself upward more dramatically when the seafloor spreads slowly. As a result, mountain ranges and cliffs become taller and more dramatic. The process by which crustal plates—large cubes of Lithospheric plates from one another is known as seafloor spreading.
As the tectonic plates move away from one another, they pull the seafloor with them, causing fractures and cracks to form. During this time, hot magma would bubble up and quickly fill in the cracks, causing the seafloor to move. This is demonstrable because magnetism on the ocean floor indicates that it formed in this manner.
Therefore, the correct option is D. seafloor spreading.
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The question is incomplete. Your most probably complete question is given below: The image is added.
Which type of star will burn hydrogen in its core?
A. red giant
B. main sequence
C. black dwarf
D. neutron star
...?
If a turtle is hit by a boat and damage is done to its shell, is the injury able to heal? Identify the correct answer to this question and the correct names for the parts of the shell in the answer.
an engine has an input temperature of 653 K and an exhaust temperature of 312 K. determine the efficiency of the engine
Answer:
52.2%
Explanation:
Efficiency= output temperature/ input temperature
output temperature= input temperature-exhaust temperature
so, 653 K - 312 K = 341 K
341 K / 653 K = 52.2%
I got the answer correct on the online quiz.
Which of these statements is correct about Newton's first law of motion?
A. It states the meanings of motion and force.
B. It justifies the meanings of motion and force.
C. It explains the relationship between motion and force.
D. It describes the relationship between motion and force.
Answer:
Answer D: It describes the relationship between motion and force.
Explanation:
The answer is D because a law is something that describes something in nature, but does not try to explain how or why is occurs (that is a theory). Options B and C sound more like theories, while option A sounds like a definition. Option D is correct because a law describes without explaining.
Final answer:
The correct statement about Newton's first law of motion is that it describes the relationship between motion and force. While related, the second law quantitatively establishes the cause and effect between force and changes in motion.
Explanation:
When examining Newton's laws of motion, it is important to understand the specific insights they provide about force and motion. Newton's first law of motion, often called the law of inertia, states that an object at rest will stay at rest, and an object in motion will remain in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Given the options, the most accurate statement about Newton's first law of motion is:
D. It describes the relationship between motion and force.
Newton's second law of motion complements the first by providing a mathematical expression of the relationship between force, mass, and acceleration. This law is crucial because it quantifies the cause and effect of forces on objects and allows us to make predictions about how an object will move when a force is applied.
Sarah owns a book store. She is planning to stock some books by a famous author. But she has a tight budget, and she is not sure whether to stock all the previous books by the author or only the latest ones. What is the scarce resource in this scenario?
What is the magnitude of the gravitational force the apple exerts on earth?
Newton's first law of motion states that an object remains at rest unless a(n) ____ force acts on it.
Newton's first law of motion states that an object remains at rest unless a(n) external force acts on it.
What is Newton's first law of motion?
Newton's first law can be defined as if an object is at rest it remains at rest, or if in motion, remains in motion which has a constant velocity unless acted on by a net external force.
The equation for Newton’s first law is as follows:
F = dp /dt
or
F = d(mv)/dt
In this statement, p is the momentum. As p=mv, the second equation replaces p with mv. V is the object’s velocity, t is the time, and F is for force.
Newton's first law can also be called as the law of inertia because inertia refers to the amount of resistance of an object can be related to a velocity change. Here, Velocity change can be described in terms of the speed of the object or its direction.
When we known with the different part of inertia is the tendency to continue which moves in the same direction line at a constant speed when no forces act on them. Thus, it can be described as an object remains at rest unless an external force acts on it.
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Final answer:
Newton's first law of motion, or the law of inertia, indicates that an object at rest stays at rest and an object in motion maintains its velocity unless acted on by a net external force.
Explanation:
Newton's first law of motion, also known as the law of inertia, states that an object remains at rest or if in motion, continues to move at a constant velocity unless acted upon by a net external force. This principle explains why an object will not change its state of motion unless a force is applied to it. For example, a soccer ball on the ground will not move until a player kicks it, applying a net external force to overcome its inertia.
Are GMO's Genetically modified organisms in plants?
When an ideal gas does positive work in its surroundings, which of the ga's quantities increases?
Volume
Internal energy
Pressure
Temperature
The system gains energy and the sign of w is positive if work is done on it. According to the principle of energy conservation, every change in the system's energy must take into account both the energy it has received and lost. Thus, option B is correct.
What internal energy positive work in its surroundings?An interaction with its environment causes a system's internal energy to decrease. The internal energy of a system grows when work is done on it.
The energy change from work always takes place as part of a process, much like the energy change from heat: a system can perform work, but it doesn't contain work.
Therefore, when the system makes an impact on the environment, we characterize work as being positive (energy leaves the system). The work is negative if it is done to the system (energy added to the system).
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a bicycle has a momentum of 12 kgm/s. What momentum would the bicycle have if it had: a) half the mass and twice the speed
b) the same mass and half the speed
c) three times the mass and half the speed
d) three times the mass and twice the speed
When an electron moves from a lower to a higher energy level the electron?
Answer: This process absorbs energy.
Explanation:
There are two ways in which electrons can transition between energy levels:
Absorption spectra: This type of spectra is seen when an electron jumps from lower energy level to higher energy level. In this process, energy is absorbed.
Emission spectra: This type of spectra is seen when an electron jumps from higher energy level to lower energy level. In this process, energy is released in the form of photons.
So, when electron jumps from lower to higher energy level, it absorbs energy.
If a star is located 100 light years from Earth, what can you conclude about the light from the star? ...?
Answer:
Light from star would take 100 years to reach the Earth.
Explanation:
1 light year can be defined as the distance which light travels in one year in space.
1 light year = speed of light × 1 year
1 light year = 9.46 × 10¹⁵ m
A star at a distance of 1 light year means that observer on earth would see the first light from the star after 1 year.
If a star is located 100 light years from the Earth, the light from the star will reach the Earth in 100 years.
30. Find the vector v with the given magnitude and the same direction as u.
||v|| = 3
u = (4,-4) ...?
Which of the following is not true of the seasons?
A. The Earth is closer to the sun during the summer and farther away from the sun during the winter.
B. The seasons are caused the tilt of the Earth on its axis.
C. Summer does not start on the same day in every country on the Earth.
D. During the summer, days are longer.
The incorrect statement about seasons is A. Earth's proximity to the Sun does not cause the seasons; it is the tilt of Earth's axis that causes seasons. The question's primary focus is on dispelling the misconception that Earth's distance from the Sun determines seasonal changes.
The statement that is not true of the seasons is A. The Earth is closer to the sun during the summer and farther away from the sun during the winter. In fact, the Earth's distance from the Sun varies only by about 3%, which is not significant enough to cause the seasons. Moreover, during the Northern Hemisphere's winter in December, Earth is actually closest to the Sun. The seasons are instead caused by the Earth's 23.5-degree tilt on its axis, leading to varying angles and durations of sunlight exposure for different parts of the world as the Earth orbits the Sun.
The tilt causes one hemisphere to be more directly exposed to the Sun's rays, making it summer there, while the other hemisphere receives less direct sunlight and thus experiences winter. This is why the Southern and Northern Hemispheres have opposite seasons. Additionally, summer does not start on the same day in every country, and during the summer, days are indeed longer due to the tilt of the Earth.