Test 1,2, and 4

Question 1

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

Answer 1

True

Question 2

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

Answer 2

True

Question 3

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

Answer 3

True

Question 4

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

Answer 4

False

Question 5

What is the SI unit of an impulse?

Answer 5

Kg m/s

Question 6

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

Answer 6

Weight

Question 7

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

Answer 7

True

Question 8

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

Answer 8

False

Question 9

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

Answer 9

False

Question 10

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

Answer 10

False

Question 11

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

Answer 11

Potential energy

Question 12

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

Answer 12

Pressure

Question 13

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

Answer 13

1000 Newtons

Question 14

How many atoms are in a thimble of water?

Answer 14

10^23

Question 15

An element’s number is based on its __________

Answer 15

Number of protons

Question 16

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

Answer 16

Triple

Question 17

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

Answer 17

Nucleus

Question 18

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?

Answer 18

35N

Question 19

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

Answer 19

The density of lower

Question 20

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

Answer 20

Same

Question 21

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?

Answer 21

It is the same

Question 22

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

Answer 22

Nucleus

Question 23

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

Answer 23

Strength

Question 24

Which would not affect one’s buoyancy underwater?

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

Answer 24

Lying down flat

Question 25

Who discovered Brownian motion?

Answer 25

Robert Brown

Question 26

How old are the oldest atoms?

Answer 26

13.82 billion years

Question 27

Which principal or law allows mercury filled barometers to work?

Answer 27

Pascal's Principal

Question 28

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

Answer 28

Your car moves toward the lower pressure

Question 29

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?

Answer 29

600,000 Newtons

Question 30

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

Answer 30

It would lose energy and begin to fall

Question 31

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

Answer 31

Isotope

Question 32

Which phase of matter is most common in the universe?

Answer 32

Plasma

Question 33

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

Answer 33

Density

Question 34

Particle Theory

Answer 34

Light seems to travel in a straight line

Question 35

Diffraction

Answer 35

Light hits something and it splits into different wavelengths

Question 36

Photoelectric effect

Answer 36

Light consists of massless bundles of EM energy, or photons

Question 37

How does light behave?

Answer 37

Like a particle and a wave

Question 38

What is the speed of light?

Answer 38

3.0 x 10^8 m/s

Question 39

What did Olaus Roemer do?

Answer 39

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

Question 40

What did Albert Michelson do?

Answer 40

Used rotating mirrors to find the speed of light

Question 41

How many kilometers is one light year?

Answer 41

9.5 x 10^12 km

Question 42

How is light emitted?

Answer 42

Light is emitted by accelerating electrical charges

Question 43

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

Answer 43

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

Question 44

What colors make white?

Answer 44

All the colors

Question 45

What colors make black?

Answer 45

Black is an absence of color

Question 46

Spectroscope

Answer 46

Excite molecules, split emitted light into distribution of colors

Question 47

Total reflection

Answer 47

An entire wave is reflected the way it came

Question 48

Partial reflection

Answer 48

A wave hits something and moves both forward and backwards

Question 49

Law of Reflection

Answer 49

The incident ray equals the reflected ray

Question 50

Total Internal Reflection

Answer 50

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

Question 51

What is the critical angle of water

Answer 51

48 degrees

Question 52

What is the critical angle of glass

Answer 52

43 degrees

Question 53

What is the critical angle of diamond

Answer 53

24.6 degrees

Question 54

Lenses

Answer 54

Use refraction to redirect light

Question 55

Retina

Answer 55

Where light should be focused

Question 56

Cornea

Answer 56

Transparent covering of the eye

Question 57

Iris

Answer 57

Regulates light intake

Question 58

Optic nerve

Answer 58

Sends information to the brain

Question 59

Farsighted

Answer 59

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

Question 60

Nearsightedness

Answer 60

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

Question 61

Which is stronger, electromagnetic or gravity?

Answer 61

EM

Question 62

What are charges measured in?

Answer 62

Coulombs

Question 63

What is the Conservation of charge?

Answer 63

Charges will always be conserved in a reaction

Question 64

What are the three types of charging?

Answer 64

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

Question 65

Grounding

Answer 65

Discharge a conductor into the ground

Question 66

Current

Answer 66

Flow of a charge due to the potential differences or voltage

Question 67

Voltage source

Answer 67

Constantly puts out electrons

Question 68

Electric power= ___________

Answer 68

Current x voltage