AnswersFL-2003310-Physical Science CRLab: Thermal Energy Transfer

Lab: Thermal Energy Transfer — Unit test Answers

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Because of the costs involved in maintaining high temperatures and pressure, nuclear _______ is not yet a practical method for generating electrical energy.Which best completes the statement?

A
fusion
B
fission
C
energy
D
generators
2
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When Javier touches a hot mug of tea, energy is transferred from the surface of the mug to his hand. What kind of energy is this?

A
nuclear
B
radiant
C
thermal
D
chemical
3

What is the unit of measure for energy?

A
watt
B
newtons
C
joules
D
meters per second
4

Adita lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adita doing work on the book?

A
She does work on the book at no time during this process.
B
She does work only while she carries the book across the room.
C
She does work from the moment she touches the book until she lets it go.
D
She does work as she picks up the book and as she lifts it to the shelf.
5

Heat transfer between two substances is affected by specific heat and the

A
chemical composition of the substances.
B
state of matter of the substances at room temperature.
C
thermal equilibrium of the substances.
D
amount of time and area of physical contact between the substances.
6

Which of these indicates that a liquid has transferred thermal energy to the air?

A
The liquid increases in temperature, and its particles lose kinetic energy.
B
The liquid decreases in temperature, and its particles gain kinetic energy.
C
The liquid increases in temperature, and its particles gain kinetic energy.
D
The liquid decreases in temperature, and its particles lose kinetic energy.
7

What is the source of almost all energy on Earth?

A
Earth’s hot core
B
the Sun
C
stored carbon
D
moving water
8

Nuclear energy is currently used in which three kinds of vehicles?

A
cars, submarines, spacecraft
B
submarines, ships, spacecraft
C
spacecraft, airplanes, cars
D
airplanes, submarines, ships
9

Carmen is heating some water and trying to measure the temperature of water using a Celsius thermometer. Which measurement can she expect once the water begins to boil?

A
32°C
B
100° C
C
212°C
D
373°C
10

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

A
position, gravity
B
gravity, velocity
C
velocity, height
D
height, position
11

Nuclear reactions in a reactor produce a lot of thermal energy. That energy then flows and warms up water, which boils and produces steam. The steam then turns turbines that generate electricity.

A
Heat flows in the form of electricity.
B
Heat flows from the reactor to the water.
C
The water produces heat.
D
The steam produces heat.
12

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

A
the volume and height the ball reaches
B
the volume and shape of the ball
C
acceleration due to gravity and the height the ball reaches
D
acceleration due to gravity and the shape of the ball
13

A powered winch is used to pull a sailboat to shore. The winch uses a 900 W motor.If the motor is used for 30 s, how much work does it do? (Power: P = W/t)

A
0.03 J
B
30 J
C
960 J
D
27,000 J
14

When a person strikes and lights a match, potential energy in the match is transformed into which types of energy?

A
electrical and thermal
B
thermal and radiant
C
radiant and nuclear
D
nuclear and kinetic
15

How does the Sun release nuclear energy?

A
through the fusion of a uranium nucleus into smaller nuclei
B
through the fusion of hydrogen nuclei into a heavier nucleus
C
through the fission of a uranium nucleus into smaller nuclei
D
through the fission of hydrogen nuclei into a heavier nucleus
16

Which is the best location for storing radioactive wastes?

A
in the sand of a remote island
B
in chambers carved into the rock of a mountain
C
in the lava tubes of an active volcano
D
in natural caverns formed by the action of a river
17

Which shows the formula for converting from degrees Celsius to degrees Fahrenheit?

A
°F = (9/5 × °C) +32
B
°F = 5/9 × (°C – 32)
C
°F = °C – 273
D
°F = °C + 273
18

Which of these results in kinetic energy of an object?

A
position
B
motion
C
mass
D
volume
19

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

A
It is increased.
B
It is conserved.
C
It is decreased.
D
It is created.
20

Simone created a chart to summarize the energy transformations that take place when energy from the wind is used to generate electricity.Which best completes the chart?

Question illustration
A
nuclear energy transformed to electrical energy
B
chemical energy transformed to electrical energy
C
radiant energy transformed to mechanical energy
D
kinetic energy transformed to mechanical energy

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