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Physics > Test 1,2, and 4 > Flashcards

Test 1,2, and 4 Flashcards

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1
Q

T/F An object may be in equilibrium despite having forces act upon it

A

True

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2
Q

T/F An object can have both kinetic energy and potential energy

A

True

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3
Q

T/F If an object has momentum, it also has kinetic energy

A

True

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4
Q

T/F If we know an object maintains a speed of 5 m/s, we can say it’s velocity isn’t changing

A

False

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5
Q

What is the SI unit of an impulse?

A

Kg m/s

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6
Q

If you moved the moon, what would change? (Mass, inertia, pants, or weight)

A

Weight

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7
Q

T/F Terminal velocity is reached when an object receives equal and opposite forces of gravity and air resistance

A

True

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8
Q

T/F Satellites orbit high above Earth where there is no gravity

A

False

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9
Q

T/F Mechanical advantage can increase the amount of work you do

A

False

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10
Q

T/F nuclear power plants are an example of something that creates energy

A

False

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11
Q

When you lift a box over your head, you give it ________________

A

Potential energy

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12
Q

Two boxes that have the same mass sit on a table, but one is sitting down and the other is sitting up. These boxes will apply different ___________ to the table

A

Pressure

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13
Q

A car drives into a big and hits it with 1000 Newtons of force. The bug hits the car back with how much force?

A

1000 Newtons

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14
Q

How many atoms are in a thimble of water?

A

10^23

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15
Q

An element’s number is based on its __________

A

Number of protons

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16
Q

According to Boyle’s Law, if I decrease the volume of a gas to 1/3 of its original size, the pressure will _______

A

Triple

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17
Q

Ernest Rutherford noticed gold foil deflected alpha particles, evidencing the existence of a __________

A

Nucleus

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18
Q

According to Hooke’s Law, if a 7N force stretches a spring 1 cm, how much forces does it take to stretch the spring 5 cm?

A

35N

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19
Q

How does the density of air at 5 km compare to the density of air at sea level?

A

The density of lower

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20
Q

How does the density of water at the surface compare to the density at 50 m?

A

Same

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21
Q

In a lake that is 100 times the length and width of a pool, how does the water pressure at 5m compare to the same depth in the pool?

A

It is the same

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22
Q

In a hydrogen atom, which has the most mass? Electron, nucleus, neutron, or proton

A

Nucleus

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23
Q

Which increases least rapidly with increasing size? Strength, volume, mass, or weight

A

Strength

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24
Q

Which would not affect one’s buoyancy underwater?

Breathing in air, letting air out, holding a ball, or lying down flat

A

Lying down flat

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25
Q

Who discovered Brownian motion?

A

Robert Brown

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26
Q

How old are the oldest atoms?

A

13.82 billion years

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27
Q

Which principal or law allows mercury filled barometers to work?

A

Pascal’s Principal

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28
Q

If your car is parked and another car drives by quickly, your car shakes. Why is this?

A

Your car moves toward the lower pressure

29
Q

A plane weighs 600,000 Newtons. It’s wings cover an area of 120 m^2. How much force due to lift is required to allow horizontal flight?

A

600,000 Newtons

30
Q

If the sun stopped shining, what would happen to the atmosphere?

A

It would lose energy and begin to fall

31
Q

If the number of neutrons in Carbon is altered, it becomes a/an _________

A

Isotope

32
Q

Which phase of matter is most common in the universe?

A

Plasma

33
Q

If you break a loaf of bread in half, which of these stays the same? Mass, volume, density, or strength

A

Density

34
Q

Particle Theory

A

Light seems to travel in a straight line

35
Q

Diffraction

A

Light hits something and it splits into different wavelengths

36
Q

Photoelectric effect

A

Light consists of massless bundles of EM energy, or photons

37
Q

How does light behave?

A

Like a particle and a wave

38
Q

What is the speed of light?

A

3.0 x 10^8 m/s

39
Q

What did Olaus Roemer do?

A

He found the speed of light using one of Jupiter’s moons

40
Q

What did Albert Michelson do?

A

Used rotating mirrors to find the speed of light

41
Q

How many kilometers is one light year?

A

9.5 x 10^12 km

42
Q

How is light emitted?

A

Light is emitted by accelerating electrical charges

43
Q

List the types of waves in the electromagnetic spectrum from low frequency to high frequency

A

Long waves, radio waves, microwaves, infrared, visible, ultraviolet, x-ray, and gamma

44
Q

What colors make white?

A

All the colors

45
Q

What colors make black?

A

Black is an absence of color

46
Q

Spectroscope

A

Excite molecules, split emitted light into distribution of colors

47
Q

Total reflection

A

An entire wave is reflected the way it came

48
Q

Partial reflection

A

A wave hits something and moves both forward and backwards

49
Q

Law of Reflection

A

The incident ray equals the reflected ray

50
Q

Total Internal Reflection

A

Beyond some critical angle, light cannot escape a medium and is internally reflected

51
Q

What is the critical angle of water

A

48 degrees

52
Q

What is the critical angle of glass

A

43 degrees

53
Q

What is the critical angle of diamond

A

24.6 degrees

54
Q

Lenses

A

Use refraction to redirect light

55
Q

Retina

A

Where light should be focused

56
Q

Cornea

A

Transparent covering of the eye

57
Q

Iris

A

Regulates light intake

58
Q

Optic nerve

A

Sends information to the brain

59
Q

Farsighted

A

Light converges too far behind the retina, therefore you need more converging

60
Q

Nearsightedness

A

Light converges in front of the retina, therefore you need less converging

61
Q

Which is stronger, electromagnetic or gravity?

A

EM

62
Q

What are charges measured in?

A

Coulombs

63
Q

What is the Conservation of charge?

A

Charges will always be conserved in a reaction

64
Q

What are the three types of charging?

A

Charging by friction (no conductor), charging by contact (with a conductor), and charging by induction

65
Q

Grounding

A

Discharge a conductor into the ground

66
Q

Current

A

Flow of a charge due to the potential differences or voltage

67
Q

Voltage source

A

Constantly puts out electrons

68
Q

Electric power= ___________

A

Current x voltage

Physics (3 decks)

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