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Unit 5 Energy Flashcards | StudBud
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Unit 5 Energy
Unit 5 Energy
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1
How does the potential energy of a 1kg volleyball that is in the air at a height of 15 m compare to one at 5m?
Tripple
1/3
1/2
Double
2
In physics, what is cold?
how it feels early in the morning in the winter
an absence or lack of "thermal energy"
a material's ability to freeze things
a substance that can be extracted from ice
3
Which energy transformation would friction cause on a moving train?
thermal energy to potential energy
kinetic energy to potential energy
kinetic energy to thermal energy
potential energy to sound energy
4
What type of energy is chemical energy?
Potential energy
Kinetic energy
gas
Renewable energy
5
What type of energy is electrical current energy?
Potential energy
Lightning energy
Mechanical energy
Kinetic energy
6
Select the point with the greatest potential energy
D
C
A
B
7
This Law states that the total amount of energy in an isolated system remains constant.
Law of Inertia
Law of Thermodynamics
Law of Conservation of Energy
Law of Conservation of Momentum
8
Which of the following is NOT evidence supporting the Big Bang Theory?
cosmic background radiation
amount of hydrogen/helium
expansion of universe (red shift)
the composition of meteors
9
The color of a star depends on _____.
its mass
where it is in the galaxy
what constellation it is in
its temperature
10
What type of force is responsible for slowing down a parachute?
Negative Force
Gravitational Force
Normal Force
Air Resistance Force
11
What is the primary method of heat transfer in a pot of pasta?
Convection
No heat transfer
Radiation
Conduction
12
What series of energy transformations occur in this process?
kinetic to gravitational to mechanical
mechanical to electrical to potential
gravitational to mechanical to electrical
gravitational to electrical to potential
13
Which two of these planet systems would have the LEAST gravitational attraction? (force of gravity)
D
B
A
C
14
What happens to the kinetic energy of a truck if its velocity doubles? KE=(1/2)mv2
half (2x less)
double (2x more)
quadruple (4x more)
KE stays the same
15
An object with a mass of 1 kilogram on Earth _____.
has more mass on the Moon
weighs the same everywhere
has less mass on the Moon
has the same mass on the Moon
16
You step out of the shower onto your tile bathroom floor. The tile feels cold on your feet because _____.
none of these
Heat flows from your feet into the floor.
Because the floor is tile.
Heat flows from the floor into your feet.
17
If a car is raised to double the original height what would the change in potential energy be? GPE=mgh (g=9.8m/s2)
double (2x more)
half (2x less)
GPE stays the same
quadruple (4x more)
18
How does heat energy reach the Earth from the Sun?
Convection
Radiation
Insulation
Conduction
19
Stored energy or energy that an object could have is called ______.
Centrifugal Force
Kinetic Energy
Potential Energy
Rolling Friction
20
In which of the following are the particles closest together?
Gas
Solid
Liquid
Fluid
21
Which two quantities are used in calculating kinetic energy of objects in motion?
temperature and velocity
mass and height
mass and velocity
temperature and height
22
If you drop a 60-kg rock and a 30-kg rock from the same height at the same time they have _____.
different accelerations
the same acceleration
quite different speeds
zero net forces
23
A ball is thrown into the air and then falls. Which type of energy change will happen as the ball hits the ground?
light energy to kinetic energy
kinetic energy to sound energy
potential energy to light energy
sound energy to potential energy
24
What type of energy is thermal energy?
Potential Energy
Kinetic Energy
Chemical Energy
Hot Energy
25
You mix one liter of water that is 40 °C with one liter of water that is 20 °C. What is the final temperature?
20 °C
40 °C
60 °C
30 °C
26
Select the point with the greatest kinetic energy.
D
C
B
A
27
How does the wave speed compare for the different types of radiation on the electromagnetic spectrum?
Higher frequency waves travel faster.
Waves with longer wavelengths travel faster.
All electromagnetic waves travel at the same speed in a vacuum.
Higher energy waves travel faster.
28
Which one of the following is NOT a way in which heat (Thermal) energy is transferred?
conduction
convection
condensation
radiation
29
What type of energy is elastic energy?
Kinetic energy
Potential energy
Stretchy energy
Useful energy
30
A roller coaster car has less Kinetic Energy at the end of the ride than at the beginning because _____.
All of the above
The Law of Conservation of Energy
The total amount of energy in an isolated system remains constant.
The car lost energy due to friction
31
What type of energy is sound energy?
Loud energy
Guitar strings
Kinetic energy
Potential energy
32
Most of the energy used on our planet ultimately comes from _____.
nuclear processes in Earth’s interior
nuclear processes in Earth’s interior
the Sun
photosynthesis
33
Which of the following is NOT one of Kepler’s Laws?
planets cover the same space in the same time no matter where it is.
planets move in elliptical orbits with the Sun as a focus
a planet's rotation is proportional to to the eccentricity of its orbit
a planet's orbital period is proportional to the size of its orbit
34
When a cannon fires a cannon ball. Why doesn’t the cannon accelerate as much as the ball?
Actually, the cannon and ball accelerate equally.
The cannon has a greater mass.
None of the above.
A greater force acts on the cannon.
35
Which is a true statement about heat?
Heat is thermal energy transferred between objects.
Every system contains heat, which is a property of that system.
Heat is a measure of the total energy of a system.
Heat moves from areas with lower temperatures to higher temperature areas.
