Midterm

Question 1

What does kinetic energy of an object depend on?

Answer 1

Both mass and the speed of the object

Question 2

How does increasing the speed of an object affect the kinetic energy of the object?

Answer 2

Increasing the speed of an object increases its motion, energy

Question 3

What type of force requires contact between two objects for one to push or pull the other

Answer 3

Frictional forces slowing down a rolling soccer ball

Question 4

The elastic energy of an object that is being stretched depends on which of the following?

Answer 4

Both how much the object is stretched and how difficult it is to stretch it

Question 5

Two cars are traveling down the road at the same speed car one has more kinetic energy than car two. Would the car weigh more than less than or the same as car two?

Answer 5

Car one weighs more than car two

Question 6

An object is moving in a straight line at a constant speed. What will happen to the object if no outside force acts on the object?

Answer 6

The speed and direction of the object will not change

Question 7

What will happen to an object that is moving forward if a force pushing it backward is greater than the force pushing it forward

Answer 7

The object will slow down stop, and then begin to move faster and faster in the opposite direction

Question 8

Sir Isaac newton stated that every object in the universe attracts matter the attraction depends on the mass of an object and the distance between the objects what type of force did Newton describe?

Answer 8

Gravitational force

Question 9

In physical science, a push or pull is called…

Answer 9

Force

Question 10

According to newtons third law of motion, when a hammer strikes and exerts a force on the nail, the nail…

Answer 10

Exerts an equal and opposite force on the hammer

Question 11

Which is needed to determine the amount of gravitational force between two objects?

Answer 11

Distance and mass

Question 12

What happens to the matter that makes up a liquid when sound travels through it?

Answer 12

As sound travels through a liquid, the matter is displaced for a period of time, but then returns to its original position after the sound passes.

Question 13

Two students are participating in a class discussion during their music lesson. One student says that when a person listens to music, the person is gaining energy because the sound transfers energy to the persons ear. The other student does not agree because a persons ear does not feel any different or listening to music. Will the person gain energy because the sound transfers energy to their ear?

Answer 13

Yes, even though the person’s ear won’t feel any different, after listening to music, sound does transfer a small amount of energy to the person’s ear, which makes parts of the ear vibrate.

Question 14

Which of the following correctly describes how energy is transferred as sound move through air?

Answer 14

As sound moves through air, molecules that make up air vibrate and collide with each other. As the molecules collide, energy is transferred from one molecule to the next.

Question 15

How does sound transfer energy through matter?

Answer 15

Sound transfers energy through matter as the molecules that make up the matter collide with one another

Question 16

Sound waves cannot carry energy through:

Answer 16

A vacuum

Question 17

18. Sound reaches our ears because sound makes air particles:

Answer 17

Vibrate

Question 18

Which of the following forms of energy can travel by vibrating particles of air?

Answer 18

Sound

Question 19

When a student listens to music, sound waves from the speaker are received by her ear. Which of the following is the physical description of this process?

Answer 19

Energy is transferred by sound waves from the speaker to the students ear

Question 20

Which factor determines the pitch of a sound wave

Answer 20

Frequency

Question 21

What part of a soundwave measures loudness

Answer 21

Amplitude

Question 22

High energy waves characterized by _____, a _______ wave is characterized by low amplitude.

Answer 22

High amplitude, low energy

Question 23

An electromagnetic wave is a transverse wave that involves the transfer of electric and magnetic energy, true or false

Answer 23

True

Question 24

How do electrically charged objects affect neutral objects when they come in contact?

Answer 24

Electrons move from negatively charged objects to neutral objects

Question 25

A doorbell contains a simple electromagnet, which change would most likely increase the strength of an electromagnet

Answer 25

A larger power source

Question 26

Which pair of items will repel each other

Answer 26

A negatively charged plastic strip in a negatively charged piece of cloth

Question 27

In outer space, there is no air only empty space between the stars and planets. Can energy be transferred by light and sound in outer space and why

Answer 27

Energy can be transferred by light in outer space, because light can travel without air carrying it, but energy cannot be transferred by sound because sound requires medium, such as air, to carry it.