Question 6 (1 point)
The gravitational potential energy of an object depends on the mass of the object, the strength of the gravitational field, and which of the following relative to the ground?
a
the shape of the object
b
the speed of the object
c
the color of the object
d
the height of the object
d) the height of the object
Are you sure
Yes, I am sure. The gravitational potential energy of an object depends on its height relative to the ground. As the object moves higher above the ground, its potential energy increases.
Question 7 (1 point)
When handling a metal pan that has been heated on a stove, an oven mitt should always be used to avoid receiving burns. Which of the following is a physical property of the metal pan that requires the use of an oven mitt when it is hot?
a
low magnetism
b
high solubility
c
high thermal conductivity
d
low thermal convection
c) high thermal conductivity
are you correct
Yes, I am correct. The use of an oven mitt when handling a hot metal pan is necessary because metal has high thermal conductivity, meaning that it can quickly transfer heat from the stove to the pan's surface. This can result in burns if the pan is touched without protection.
When a pole vaulter reaches the top of her vault, how does her potential energy compare to her kinetic energy?
a
The kinetic energy and potential energy are the same.
b
The kinetic energy is twice the amount of potential energy.
c
The kinetic energy is less than the potential energy.
d
The kinetic energy is greater than the potential energy.