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4th Six Weeks Review

Total questions: 49

Worksheet time: 58mins

Name
Class
Date
1.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
2.
Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?
a)
Cart B
b)
Cart A
c)
they are the same
3.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes 
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes 
d)
the impulse on an object is less than the change in momentum it causes
4.
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
a)
0.5 m/s
b)
1.0 m/s
c)
0.33 m/s
d)
0.67 m/s
5.
If two objects have the same mass, then the faster moving object has ____________ momentum.
a)
more 
b)
less
c)
the same
6.

Juan observed a collision in a lab where the kinetic energy after the collision was equal to the kinetic energy before the collision. This type of collision is

a)

Inelastic

b)

Elastic

c)

Explosion

7.

When is momentum conserved in a collision?

a)

When the collision is inelastic.

b)

When the collision is elastic.

c)

When the collision is inelastic OR elastic but never an explosion.

d)

All collisions.

8.

Extending the time of a collision allows you to...

a)

change the impulse of the collision.

b)

diffuse the collision.

c)

increase the force of impact.

d)

decrease the force of impact.

9.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
10.
If 2 objects collide and stick together, what will happen to their velocities?
a)
velocities will increase
b)
velocities will decrease
c)
velocities will stay the same
d)
none of the above
11.
In this type of collision, objects tend to "stick" together.
a)
elastic
b)
inelastic 
c)
They "stick" together in both types of collisions
12.
In any collision (crash) the ______ is ALWAYS constant.
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
13.
A 10kg toy truck moves at 5m/s East. It collides and bounces off of a 5kg toy car moving 10 m/s moving west. Which equation would you use to solve for the final velocity of the car?
a)
m1v1i+m2v2i=m1v1f+m2v2f
b)
(m1+m2)vi=m1v1f+m2v2f 
c)
m1v1i+m2v2i=(m1+m2)vf
14.
What is the unit for momentum?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
15.
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
a)
2 m/s
b)
8 m/s
c)
-2 m/s
d)
1.5 m/s
16.
What is the transfer of heat by movement of liquids or gases?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
17.
What is a transfer of heat energy by electromagnetic waves?
a)
Radiation
b)
Convection
c)
Conduction
d)
Heat
18.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
19.
What is the measurement of the average kinetic energy of a substance?
a)
Kinetic energy
b)
Temperature
c)
Thermal energy
d)
Potential energy
20.

Feeling heat from a campfire

a)

Conduction

b)

Convection

c)

Radiation

21.

Energy that is transferred through a fluid where hot rises and cold sinks

a)

Conduction

b)

Convection

c)

Radiation

22.
How many laws of thermodynamics are there?
a)
a lot
b)
3
c)
4
d)
1
23.
Which way does heat flow?
a)
hot to cold
b)
cold to hot
c)
it doesn't 
24.
Entropy increases from solid, liquid to gas. Why?
a)
Molecular disorder increases
b)
Molecular randomness decreases
c)
Molecules are more energetic
d)
Molecules are more reactive
25.
Which law of thermodynamics states that absolute zero cannot be reached?
a)
1st
b)
2nd
c)
3rd
d)
Zeroth
26.
The _____ Law of Thermodynamics says that heat always flows from an object with a higher temperature to an object of lower temperature naturally
a)
Zeroth
b)
First
c)
Second
d)
Third
27.
My coffee and the creamer have the same temp.  My cofee and the cup have the same temp. So...Creamer and cup have same temp.
a)
Zeroth Law
b)
First Law
c)
Second Law
d)
Third Law
28.

Which phase change represents a decrease in entropy?

a)

solid to liquid

b)

gas to liquid

c)

liquid to gas

d)

solid to gas

29.

The entropy will usually increase when

a)

a molecule is broken into two or more smaller molecules

b)

a reaction occurs that results in an increase in the number of moles of gas

c)

a solid changes to a liquid

d)

all of these

30.

Which of these have a DECREASE in entropy?

a)

CaCO3(s) → CaO(s) + CO2(g)

b)

2NO2(g) → N2O4(g)

c)

2NH3(g) → 3H2(g) + N2(g)

d)

C6H6(l) → C6H6(g)

31.

Which involves an increase in entropy? (if needed, select more than one answer)

a)

spraying an air freshener

b)

picking up apples off the ground

c)

dropping an egg on the floor

d)

arranging a deck of cards by suit

32.
What is a example of a conductor?
a)
wood 
b)
metal
c)
rubber
d)
rock
33.
What is a example of a insulator?
a)
metal 
b)
rubber
c)
water
34.
A material in which electrons are not able to move easily 
a)
Circuit 
b)
Insulator 
c)
Resistance 
d)
Conductor
35.
Transferring a charge without touching is ___
a)
conduction
b)
induction
c)
grounding 
d)
Newtons 3rd law
36.
Rubbing a balloon on hair is an example of static charge build up created by....
a)
conduction
b)
friction
c)
induction
d)
hairduction
37.

The process of transferring charge between objects by touching

a)

charging by induction

b)

static discharge

c)

charging by contact

d)

proton

38.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
39.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
40.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
41.

What is voltage?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

42.

When three 20-ohm resistors are wired in parallel and connected to a 10-volt source, the total resistance of the circuit will be

a)

less than 20 ohms

b)

60 ohms

c)

between 20 and 60 ohms

d)

more than 60 ohms

43.

If the total resistance of the circuit shown is 15 ohms, what is the value of resistor R?

a)

6 ohms

b)

9 ohms

c)

12 ohms

d)

18 ohms

44.

An electric lamp has a current of 0.50 amps passing through it when connected to a 120-volt electrical outlet. This lamp will develop a power of

a)

5.0 watts

b)

110 watts

c)

120 watts

d)

60 watts

45.

An electric iron draws a current of 5 amps and has a resistance of 20 ohms. The amount of energy used by the iron in 40 seconds is

a)

100 J

b)

500 J

c)

4,000J

d)

20,000J

46.

Materials that conduct electricity with zero resistance

a)

Conductors

b)

Semiconductors

c)

Superconductors

d)

Insulators

47.

Which sphere represents an insulator?

a)

Sphere A

b)

Sphere B

48.

The following diagram represents atoms in...

a)

Conductors

b)

Insulators

49.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V

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