Question 1
Which of the following is the best example of potential energy?
ANSWER
a ball sitting at the top of a hill
EXPLANATION
As we know that Potential Energy is given by
U = mgh
so as height will be more more is the potential energy
Question 2
Which of the following is an example of kinetic energy?
ANSWER
a girl running in a race
EXPLANATION
As we know that Kinetic Energy is given by
[tex]KE = \frac{1}{2}mv^2[/tex]
So more speed means more kinetic energy
Question 3
The water held by a dam is an example of which type of energy?
ANSWER
potential energy
EXPLANATION
As we know that Potential Energy is given by
U = mgh
Since water is at rest so its energy is Potential Energy
Question 4
What does the kinetic theory explain?
ANSWER
Heat is due to the motion of molecules.
EXPLANATION
As the molecules of medium is in motion so it shows energy transfer which is also known as HEAT
Question 5
If the atoms and molecules of a substance are moving very fast, the substance is __________.
ANSWER
Hot
EXPLANATION
Since heat is the measure of motion of molecules so here since molecules are moving fast then temperature must be more
Question 6 (1 point)
Heat energy is measured indirectly by __________.
ANSWER
Recording of motion of molecules
EXPLANATION
Since heat will show the speed of molecules so motion of molecules is represented by heat.
Question 7
What are the ways that heat moves?
ANSWER
Heat moves through conduction convection and radiation
EXPLANATION
There are three ways of thermal energy transfer
conduction, convection, and radiation.
Question 8
Convection requires __________ to transfer heat.
ANSWER
As the molecules of medium is in motion so it shows energy transfer which is also known as HEAT
EXPLANATION
In convection mode of heat transfer the molecules will move and carry heat along with them.
Question 9
What does an insulator do?
ANSWER
An insulator slows heat transfer.
EXPLANATION
Thermal insulator stops the flow of heat through them and complete slow down of heat
The ball sitting at the top of the hill is the best example of potential energy and a running girl is an example of kinetic energy.
It is the energy of a system due to the relative position of the different components.
[tex]U = mgh[/tex]
Where,
[tex]m[/tex] - mass
[tex]g[/tex] - gravitational acceleration
[tex]h[/tex] - height
So, the ball sitting at the top of the hill is the best example of potential energy.
Kinetic Energy:
It is the energy of an object due to its motion. Thus, a girl running in a race is an example of kinetic energy.
Therefore, the ball sitting at the top of the hill is the best example of potential energy and a running girl is an example of kinetic energy.
Learn more about potential energy?
https://brainly.com/question/2709059
