your answer would be 27.
The ratio of kinetic energy of ball A to ball B is 27
Answer: Option D
Explanation:
The kinetic energy of any object is the energy exhibited by the object when it is in motion. The kinetic energy of any object is directly proportional to the mass of the object and square of the speed at which the object is moving. So the kinetic energy of any object can be represented as
[tex]E_{k}=\frac{1}{2} \times m \times(\text { speed })^{2}[/tex]
In this case, for ball B the mass is 1 kg and speed is 1 m/s. So the kinetic energy of ball B is
[tex]\text { Kinetic energy for ball } B=\frac{1}{2} \times 1 \times 1^{2}=0.5 J[/tex]
As it is said that the mass (M) and speed of ball A is three times the mass and speed of ball B. So ,
[tex]\text { M of ball } A=3 \times M \text { of ball } B=3 \times 1=3 \mathrm{kg}[/tex]
And,
[tex]\text { Speed of ball } A=3 \times \text { Speed of ball } B=3 \times 1=3 \mathrm{m} / \mathrm{s}[/tex]
Thus, the kinetic energy of ball A will be
[tex]\text {Kinetic energy for ball } A=\frac{1}{2} \times 3 \times 9=13.5 \mathrm{J}[/tex]
Now, to determine the ratio of kinetic energy of ball A to ball B,
[tex]\text { Ratio of kinetic energy }=\frac{\text {Kinetic energy of Ball } A}{\text {Kinetic energy of Ball } B}=\frac{13.5}{0.5} = 27[/tex]
Randomly assigning students to two different groups in an experiment on
memory would be:
A. an important measure for controlling bias.
B. an important measure to counteract interviewer bias.
C. an important measure to discourage under-coverage.
D. an important measure to counteract wording bias.
Answer:
A.) an important measure for controlling bias.
Explanation:
Randomly assigning students to two different groups in an experiment on
memory would be an important measure to discourage under-coverage.
Random assignment of students to two different groups in an experiment on memory is an important measure for controlling bias as it eliminates systematic differences between the groups, allowing us to attribute any observed differences to the independent variable manipulation.
Explanation:Randomly assigning students to two different groups in an experiment on memory would be an important measure for controlling bias. With random assignment, all participants have an equal chance of being assigned to either group, which makes it unlikely that there are systematic differences between the groups. This allows us to assume that any differences observed between experimental and control groups result from the manipulation of the independent variable.
In electricity distribution, why is low voltage safer for consumers?
Answer:
Explanation:
The transmission lines contain about 2500 volts. It is dangerous enough to get zapped by 120 volts. Think what 20 times that much would do to you.
computer programs like spreadsheets can be used to help organize and analyze data. True or false
Answer:
The statement is TRUE
Explanation:
computer programs like spreadsheets can be used to help organize and analyze data. Regression Analysis can be carried out in Excel to determine the relationship between two quantitative variables.
Computer programs like spreadsheets are used to organize and analyze data is a TRUE statement.
Explanation:
The spreadsheets or the database access programs of computer are the ones which helps us to organize a set of data significantly and thus helps to analyze them easily. Taking instance of spreadsheet, each data represented by the user defined parameter and set of value which represents the parameter.
Each of these are well input in single cell and the cell are spread over sheet in form of rows and column. This helps to give a good organized set of data representation and thus helps in analysis easily.
When __ and magnetic fields both exist, it is called an electromagnetic field.
Hello There!
When "ELECTRIC" and magnetic fields both exist, it is called an electromagnetic field.
An electric field is a field extending outwards in all directions from a charged particle.
Answer:
Electric
Explanation:
electromagnetic fields are created when charged particles are accelerated
Technician A says that if the cooling system has been exposed to the air for more than 24 hours, the drier should be replaced. Technician B says that repairs should be made before refrigerant is evacuated from a system. Who is correct?
A. Both Technicians A and B B. Technician B C. Technician A D. Neither Technician A nor B
Answer:
Option A. Both Technicians A and B
Explanation:
Both technicians are correct. There are fundamentals that have to be understood regarding cooling systems.
The cooling system depends on a thermodynamic system that involves the expansion and compression of the cooling fluid. In addition, the coolant is the one that circulates in the pipes influencing convention currents between the pipes (coiled pipes) or otherwise. It is noteworthy that the dryer be kept out of the reach of moisture as this will corrode. Therefore, a drier that comes in contact with moisture needs to be replaced as this brings about corrosion.
In addition, it is also very important to remove the refrigerant from the system so that there will not be extreme fluctuations in temperature and pressure. In order to be on the safe side, the refrigerant needs to be replaced.
Final answer:
Both Technician A and Technician B are correct regarding AC system maintenance. Technician A advises replacing the drier after long exposure, while Technician B recommends making repairs before evacuating the refrigerant. Budgeting 1.1 hours of service time may need to be re-assessed based on statistical analysis.
Explanation:
The question seems to pertain to the maintenance and repair practices associated with air conditioning (AC) systems, touching on subjects like cooling system exposure, drier replacement, and refrigerant evacuation. Technician A advises that a drier should be replaced if the cooling system has been exposed to air for more than 24 hours. This is generally correct because prolonged exposure to moisture can contaminate the drier, which is tasked with absorbing moisture in the system. On the other hand, Technician B suggests that repairs should be made before refrigerant is evacuated. This is also generally correct as it prevents wasting refrigerant and ensures that any leaks or issues are dealt with prior to recharging the system. Therefore, the correct answer is that both technicians are correct.
When it comes to air conditioner maintenance, as described in the reference, understanding the average servicing time and standard deviation is crucial for planning and resource allocation. Budgeting 1.1 hours per technician based on the company's service records may or may not be sufficient depending on the actual time taken to service units, which varies according to a normal distribution. If the normal distribution assumption holds, using the mean and standard deviation provided, one can use statistical analysis to determine the probability that the average service time will exceed 1.1 hours.
In AC systems, the condenser is the component responsible for converting gaseous refrigerant back into a liquid form. This process releases the absorbed heat to the outside environment.
The efficacy of an air conditioner is often measured in terms of its thermal energy removal capacity, with common units being watts or BTU/hr. AC systems can be categorized as vapor compression systems, vapor absorption systems, and open-loop evaporative systems, all of which use the evaporation of fluid to remove heat from the air.
Which describes time dilation?
A. The faster an object moves, the more stretched time becomes.
B. The more slowly an object moves, the more stretched time becomes.
C. The faster an object moves, the more time it takes for light to travel a given distance.
D. The faster an object moves, the less time it takes for light to travel a given distance.
Answer:
A. The faster an object moves, the more stretched time becomes.
Explanation:
According to special theory of relativity, when there is relative motion between two objects, an observer observes more stretched time with respect to another frame. This slowing down of time becomes apparent when the object moves very fast (close to the speed of light).
Thus, option A is correct.
The faster an object moves, the more stretched time becomes. The correct answer is A. Time dilation is a phenomenon predicted by the theory of relativity, both special and general relativity.
It states that time can appear to move at different rates for objects in different states of motion or in different gravitational fields.
According to special relativity, when an object moves at a high velocity relative to another object, time appears to slow down for the moving object from the perspective of the stationary observer. This effect is known as time dilation. As the velocity of the object increases, time dilation becomes more pronounced, and time appears to be "stretched" or slowed down for the moving object.
This phenomenon has been experimentally confirmed through various experiments, such as the measurement of the lifetimes of fast-moving particles in particle accelerators.
Therefore, option A is the correct description of time dilation: The faster an object moves, the more stretched time becomes.
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Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy
of Car B is:
times that of Car A
times that of Car A
2 times that of Car A
4 times that of Car A
16 times that of Car A
Answer:
16 times that of car A
Explanation:
Moving objects have kinetic energy which is calculated using the formula:
E=(1/2)mv² where m is the mass of the object and v is its velocity.
For car A, kinetic energy =1/2×m×15²
=112.5m........................................i
For car B, the kinetic energy =1/2×m×60²
=1800m......................................ii
dividing ii by i we get
1800m/112.5m= 16.07
Therefore The kinetic energy of car B is 16.07 times that of car A
A vertical column within the periodic table represents a:
Answer:
A vertical column in a periodic table is called a group, I hope you found this answer helpful.
Answer:
The answer is: a group.
Explanation:
The periodic table can be divided into groups and periods. The periods are the horizontal rows, and the elements in the same period have the same number of orbitals, and similar molecular weights. The groups are the vertical columns, and the elements in the same group have the same atomic valence.
Why are New Hampshire students required to learn about earths systems
Answer:
Explanation:
Why are students in Hawaii required to learn the history of debate surrounding the writing of the first 10 amendments to the constitution? They were not a member of the United States at the time?
The reason they have to learn anything they can about the constitution is because they are governed by it (just as you are).
The reason you have to learn about the Earth's Systems is because currently there is a huge debate about global warming. The problem is that we are not sure what the solution might be and we've already spent billions on reducing our effect on the environment. Billions means your tax dollars (many) or that of your parents. Many scientists are not sure we should be doing anything.
You will enter the work force one day and if you get a good job, you will be taxed. You should never be unaware of what your tax dollars are spent on.
A beach ball with a volume of 5,000 cm3 is pushed underwater. What is the magnitude of the buoyant force pushing upwards? The density of water is 1 gram/cm3. 49N 25N 40N 39N
The answer is:
The buoyant force is equal to 49N.
Why?The buoyant force is the force that pushes upwards and object when it's submerged in water, this force is always trying to move the object to the surface of the liquid or water. We must consider that the volume of water or liquid displaced is equal to the volume of the submerged object.
We can calculate the buoyant force using the following formula:
[tex]F_{B}=Density*VolumeDisplaced*GravityAcceleration[/tex]
Where,
Density is the density of the water or liquid.
Volume displaced is equal to the volume of the submerged object.
Gravity acceleration is the acceleration due to gravity.
So, from the statement we know that:
[tex]VolumeDisplaced=BeachBallVolume=5000cm^{3}\\\\Density=1\frac{gram}{cm^{3} }=\frac{0.001kg}{cm^{3} }\\\\g=9.8\frac{m}{s^{2} }[/tex]
Now, substituting and calculating we have:
[tex]F_{B}=Density*VolumeDisplaced*GravityAcceleration[/tex]
[tex]F_{B}=0.001\frac{kg}{cm^{3}*} *5000cm^{3}*9.8\frac{m}{s^{2} }[/tex]
[tex]F_{B}=0.001\frac{kg}{cm^{3}*} *5000cm^{3}*9.8\frac{m}{s^{2} }[/tex]
[tex]F_{B}=49\frac{Kg.m}{s^{2}}=49N[/tex]
Hence, we have that the correct answer is:
The buoyant force is equal to 49N.
Have a nice day!
when solid surfaces slide over each other the kind of friction that occurs is called ____ friction
Answer:
sliding friction
Explanation:
Hello There!
When two objects are moving relative to one another while rubbing together, the frictional force between them is called kinetic friction.
Buoyancy is a force that always acts in an
fluid on a body placed in the fluid,
direction exerted by a
Buoyancy is a force that always acts in an upward direction exerted by a fluid on a body placed in the fluid
Hope this helps :)
Answer:
Explanation:
Buoyancy is a force that always acts in the upward direction against the weight of the immersed or semi-immersed object in the fluid. In any fluid( air or water) column pressure increases as we go deeper because of the overlying fluid. Here magnitude of the buoyancy force is proportional to the pressure difference.
Which best describes the term derived unit in SI?
1.one of the metric base units that is the foundation of SI
2.a conversion factor between base units
3.a specific combination of base units with its own name
4.a prefix multiplier for a base unit
Derived units in SI are specific combinations of base units with their own unique names.
Explanation:The term 'derived unit' in SI refers to option 3: a specific combination of base units with its own name. This means that derived units are formed by multiplying or dividing the base units to create new units with their own unique names. For example, the unit of speed, meters per second (m/s), is a derived unit that combines the base unit of distance (meter) with the base unit of time (second).
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A derived unit in SI is a specific combination of base units with its own name.
Explanation:The correct option that describes the term 'derived unit' in the International System of Units (SI) is 3. A derived unit is a specific combination of base units with its own name. It refers to units that are built from the seven base units, such as meters, seconds, and kilograms, and have their own unique names. These units are formed by multiplying or dividing the base units and are used to measure quantities other than the base quantities. For example, the unit of speed is meters per second (m/s), which is derived by dividing the unit of distance (meter) by the unit of time (second).
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If a liter of water is heated from 20 C to 50 C, what happens to its volume?
a. The volume decreases.
b. The volume increases.
c. The volume first increases, then decreases.
d. The volume first decreases, then increases,
Please select the best answer from the choices provided
Answer:
The volume increases
Choice B is correct
Explanation:
If a liter of water is heated from 20 C to 50 C its volume will increase.
Matter exists in 3 states;
Solids
Liquids
Gases
Matter expands when heated, consequently occupying more space. This implies that volume will increase
Heating a liter of water from 20 C to 50 C generally causes an increase in its volume due to the thermal expansion of water.
Explanation:When a liter of water is heated from 20 C to 50 C, its volume generally increases due to the thermal expansion property of water. When water is heated, its molecules move faster and occupy a larger space, causing an increase in its volume. Therefore, answer b. The volume increases, is the best choice among the options given.
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a rabbit moves moves a distance 8cm from P to Q and then moves a distance of 6cm at right angles to PQ ? what is the magnitude of its displacement
Answer:
10cm
Explanation:
While moving distance P to Q the rabbit made a horizontal displacement along the x-axis.Then it moved at right-angle to PQ, which means it made a vertical displacement along the y-axis.The movement thus from P to Q to the end point lets say point E after the vertical movement can be sketched as a right-triangle if you join the endpoint , E to the start point P.
Apply the Pythagorean relationship where the horizontal movement will represent the longer side a, the vertical movement to represent the shorter side b, where as the displacement will be represented by the hypotenuse side c
Hence if; a=8cm, b=6cm, c=?
Apply⇒ a²+b²=c²
8²+6²=c²
64+36=c²
100=c²
√100=c
10cm=c
Magnitude of displacement is 10 cm
Using the Pythagorean theorem, the magnitude of the rabbit's total displacement, which involves two perpendicular displacements of 8 cm and 6 cm, is calculated to be 10 cm.
Explanation:The rabbit's movement involves two right-angle (perpendicular) displacements: from P to Q which is 8 cm, and then a further displacement of 6 cm. To find the total displacement, we can apply the Pythagorean theorem because these displacements are at right angles to each other. This theorem states that in a right-angled triangle, the square of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides.
So, our calculation will be √(8² + 6²) cm = √(64 + 36) cm = √100 cm = 10 cm. Therefore, the magnitude of the total displacement of the rabbit is 10 cm.
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what happens in a global convection cell
Answer:
Earth's convection cells and how winds curve due to the Coriolis effect. currents of air or water due to Earth's rotation. Convection also occurs on a global scale. Warm, less-dense air at the equator tends to rise and flow toward the poles.
Explanation:
Answer:
The wind pattern that occurs in the atmosphere of the earth over a large scale refers to the convection cells. The water in the equatorial region receives a maximum amount of sunlight, as a result of which it becomes warm and less dense. This lighter is then rises up forming a low-pressure one and starts moving towards the poles in both the hemispheres. These lighter air mass then cools down as it reaches the poles and eventually gets denser and sinks down. This dense cold water further flows back to the equator moving at the seafloor.
During its motion from the equator to the poles, the air gets deflected due to a force that generates because of the earth's rotation. This force is known as the Coriolis force. This causes the wind to flow in a clockwise manner in the northern hemisphere, and anticlockwise in the southern hemisphere.
Due to this motion of wind and the effect of Coriolis force, the low-pressure zones are formed at the equator and the Arctic and Antarctic circles, whereas the high-pressure zones are formed at the near-tropical region and the poles.
The horizontal on the periodic table of elements are called periods
Answer:
The answer is true. The horizontal line on the Periodic Table is called periods.
Answer:
Rows
Explanation:
The horizontal _rows_ on the periodic table of elements are called periods.
A toy airplane, flying in a horizontal, circular
path, completes 10. complete circles in 30.
seconds. If the radius of the plane’s circular path
is 4.0 meters, the average speed of the airplane is
(1) 0.13 m/s (3) 1.3 m/s
(2) 0.84 m/s (4) 8.4 m/s
Answer:
8.4 m/s
Explanation:
The toy completes 10 circle in 30 seconds. So its frequency of revolution is
[tex]f=\frac{10}{30 s}=0.33 Hz[/tex]
The periof of revolution is the reciprocal of the frequency, so
[tex]T=\frac{1}{f}=\frac{1}{0.33 Hz}=3 s[/tex]
The radius of the circular path is
r = 4.0 m
So the total distance covered by the toy in one circle is the length of the circumference:
[tex]2\pi r[/tex]
And so the average speed is
[tex]v=\frac{2\pi r}{T}=\frac{2\pi (4.0 m)}{3 s}=8.4 m/s[/tex]
The average speed of the airplane is 8.4 m/s
Further ExplanationGiven :
number of rotation = N = 10
time intervals = Δt = 30 s
radius = R = 4.0 m
Unknown :
average speed = v = ?
Solution :
v = ω × R
v = ( θ / Δt ) × R
v = ( 10 × 2π / 30 ) × 4
v = (8π / 3) m/s
v ≈ 8.4 m/sLearn moreNewton's Law of Motion: https://brainly.com/question/10431582
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Answer detailsGrade: High School
Subject: Physics
Chapter: Dynamics
Keywords: Newton, Law, Impulse, Work
HCI is___
An acid
A base
A salt
Answer:
Explanation:
As far as I know, when H is the metal, the compound is an acid.
A base has OH as its non metal as in KOH.
A salt has neither.
2) Why do satelites not
Fall while revolving
around the earth?
Answer:
Because they are moving to fast for Earth's gravity to pull it down.
Conventional prescription eyeglasses are considered sufficient PPE for eye protection
Answer:
False
Choices:
A) True B) False
Why are graphs useful when interpreting data
Answer:
They make trends in the data easier to see.
If a textbook weighs 37.2 N on Venus, and the book has a mass of 4.4 kg, what is the strength of gravity on Venus?
8.9 m/s2
8.9 m/s
I don't have enough information,
9.8 m/s2
[tex]F=ma[/tex]
Where F is force, m is mass and a is acceleration.
[tex]37.2N=4.4kg\cdot a\Longrightarrow a=\dfrac{37.2N}{4.4kg}=\boxed{8.45\dfrac{m}{s^2}}[/tex]
Hope this helps.
r3t40
IUPIL U5L
Aluve
TIME REMAINING
01:53:45
EI
and
both agreed that childhood experiences play an important role in the development of oneself
A Sigmund Freud Alfred Adler
B. Carl Jung ... Alfred Adler
C.Carl Jung Erik Erikson
D. Sigmund Freud.. Carl Jung
Please select the best answer from the choices provided
Save and Exit
Next
Submit
Mark this and return
Answer:
The actual correct answer is Sigmund Freud and Alfred Adler
Explanation:
Sigmund Freud and Alfred Adler both agreed that childhood experiences play an important role in the development of oneself.
How is Adler's theory different from Freud's?At the same time as Freud centered on best the inner processes particularly sexual conflicts that have an effect on someone's psychology, Adler changed into adamant that to fully understand someone, a psychologist ought to also remember other inner elements as well as external factors.
Are Sigmund Freud and Alfred Adler related?Adler and Freud belong from Austria. Both went to the equal university i.e. the college of Vienna. Adler became a colleague of Freud, and he also helped in the improvement of psychoanalysis.
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Downhill skiers race over a course that's 3,500 m long in 2 minutes, 10
seconds. What is their approximate average speed for this course?
O A. 19.2 m/s
O B. 1.67 m/s
O C. 1,667 m/s
O D. 26.9 m/s
SUBMIT
Answer:
=26.92 m/s
Explanation:
Speed is calculated as a ratio of the total distance covered ( It is directionless) to the total time taken to cover the distance.
Average speed= total distance/total time
=x/t
Total distance from the question= 3500m
Total time taken to cover the above distance = 2×60 +10=130 Seconds
Therefore, average speed= 3500m/130 s
=26.92 m/s
What type of circuit is illustrated?
A.a closed series circuit
B.an open series circuit
C.an open parallel circuit
D.a closed parallel circuit
An open series circuit is an electrical circuit in which the electric current does not circulate because the switch is open interrupting the flow of current. There must be a closed path for the current to flow through the circuit.
A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car's acceleration?
O 2 m/s
O 15 m/s
O 30 m/s
050 m/s
Answer: [tex]2m/s^{2}[/tex]
Explanation:
Assuming the car is moving only in one direction (to the South), its acceleration [tex]a[/tex] is given by the following formula, which expresses the variation of the velocity in time:
[tex]a=\frac{\Delta V}{\Delta t}[/tex] (1)
Where:
[tex]\Delta V=V_{2}-V_{1}=40m/s-10m/s=30m/s[/tex] is the variation in velocity
[tex]\Delta t=t_{2}-t_{1}=15s-0s=15s[/tex] is the variation in time
Rewritting (1) with the calculated values:
[tex]a=\frac{30m/s}{15s}[/tex] (2)
[tex]a=2m/s^{2}[/tex] This is the acceleration of the car
happiness is to senipah as 517768399 is to what?
Answer:
9386715
Explanation:
The order is reversed and duplicates are removed.
Reversed: 993867715
Duplicates removed: 9386715
Happiness is to 517768399 as senipah is to 9386715. Correct option is C.
To find the relationship between "Happiness" and "517768399" and then apply the same relationship to "senipah," we need to analyze the pattern.
If we rearrange the digits of "Happiness" (8 digits), we get "517768399."
Now, let's rearrange the letters of "senipah" to get "happiness."
So, the correct answer is:
C) 9386715
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Complete question is:
Happiness is to 517768399 as senipah is to
A) 9836715 B) 9386615
C) 9386715 D) 9386517
Which of the following is a strategy for remaining alcohol-free?
A.
lie to your parents
B.
know alcohol-related urban myths
C.
seek out situations where alcohol is served
D.
prepare excuses
Answer:
I'm not sure if your question is how do you refuse alcohol but my answer is D.
Explanation:
If you get offered to drink you can use good excuses such as, "That's not really my things sorry." Or " Nah, i'm good". Make sure it is a firm response so the offerers don't keep asking
Hope this helps
if it does please mark brainliest :D
-A. Hazle
Answer:
D.) Prepare excuses
Explanation:
Which equation below would you use to determine the number of neutrons in a given nucleus when you are given the atomic number (Z) and atomic mass (A)?
N = A + Z
N = A/Z
N = AZ
N = A – Z
Answer:
A-Z
Explanation:
A proton has an estimated weight of 1.
Answer:
N = A - Z
Explanation:
Atomic number is the number of protons in a nucleus
Atomic mass is the number of protons and neutrons
N will be give when you subtract A from Z giving you the number of neutrons
hope this helps thx