Physics and Human Affairs UARK Exam 1 |
Questions and Answers
The furnace of a coal fired steam electric power plant is where the coal is
burned. What energy
conversion takes place in the furnace?
a. thermE to radE
b. thermE to kinE
c. chemE to thermE
d. kinE to chemE - -c
- Which of the following energy transformations represents the operation of
a wind turbine?
a. Thermal E --> Electric E.
b. Kin E --> Electric E
c. Electric E --> Kin E
d. Grav E --> Electric E - -b
- Which of the following would increase the gravitational force between two
objects?
a. Moving the two objects farther apart
b. Moving the two objects closer together.
c. Reducing the mass of either one of the objects
d. none of these answers would increase the gravitational force between
these two objects - -b
- How much energy does a 1200 W hair drier use if it runs for 10 minutes
(600 seconds)?
a. 12000 J
b. 200 J
c. 720000 J
d. can't be determined with the information given - -c
- . What is the gravitational energy of a 40 N bowling ball sitting on a shelf
1.5 m above the floor?
a. 60 J
b. 26.66 J
c. 45 J
d. 1200 J - -a
- A toy car is moving. The net force on the car is in the direction opposite the
direction of motion. What
will the car do?
a. it will speed up
b. it will slow down
, c. it will keep going at its current speed - not speeding up or slowing down
d. none of the above - -b
- An engine that consumes 400 J of thermal energy while exhausting 300 J
has an efficiency of
a. 75%
b. 133%
c. 100%
d. 66%
e. 25% - -e
- What is the natural, unforced motion of a moving object in space (like the
moon or a planet)? That is,
what would the motion of the object be if there were no forces on it?
a. it would move in a circle
b. it would slow down and stop moving
c. it would move in an ellipse
d. it would move in a straight line
e. it would move in a parabola - -d
- Which of the following is not a fossil fuel?
a. coal
b. natural gas
c. oil
d. hydrogen gas
e. all of the above are fossil fuels - -d
- What was the energy transformation that took place during Joule's
experiment with the water wheel?
a. chemE --> kinE --> elastE
b. gravE --> chemE --> thermE
c. gravE --> kinE --> thermE
d. thermE --> kinE - -c
- 1. What is the metric unit of power?
a. joule
b. newton
c. calorie
d. gems
e. watt - -e
- What is the kinetic energy of a 18 kg bulldog running at 2 m/s?
a. 36 J
b. 72 J
c. 18 J
d. 9 J - -a
Questions and Answers
The furnace of a coal fired steam electric power plant is where the coal is
burned. What energy
conversion takes place in the furnace?
a. thermE to radE
b. thermE to kinE
c. chemE to thermE
d. kinE to chemE - -c
- Which of the following energy transformations represents the operation of
a wind turbine?
a. Thermal E --> Electric E.
b. Kin E --> Electric E
c. Electric E --> Kin E
d. Grav E --> Electric E - -b
- Which of the following would increase the gravitational force between two
objects?
a. Moving the two objects farther apart
b. Moving the two objects closer together.
c. Reducing the mass of either one of the objects
d. none of these answers would increase the gravitational force between
these two objects - -b
- How much energy does a 1200 W hair drier use if it runs for 10 minutes
(600 seconds)?
a. 12000 J
b. 200 J
c. 720000 J
d. can't be determined with the information given - -c
- . What is the gravitational energy of a 40 N bowling ball sitting on a shelf
1.5 m above the floor?
a. 60 J
b. 26.66 J
c. 45 J
d. 1200 J - -a
- A toy car is moving. The net force on the car is in the direction opposite the
direction of motion. What
will the car do?
a. it will speed up
b. it will slow down
, c. it will keep going at its current speed - not speeding up or slowing down
d. none of the above - -b
- An engine that consumes 400 J of thermal energy while exhausting 300 J
has an efficiency of
a. 75%
b. 133%
c. 100%
d. 66%
e. 25% - -e
- What is the natural, unforced motion of a moving object in space (like the
moon or a planet)? That is,
what would the motion of the object be if there were no forces on it?
a. it would move in a circle
b. it would slow down and stop moving
c. it would move in an ellipse
d. it would move in a straight line
e. it would move in a parabola - -d
- Which of the following is not a fossil fuel?
a. coal
b. natural gas
c. oil
d. hydrogen gas
e. all of the above are fossil fuels - -d
- What was the energy transformation that took place during Joule's
experiment with the water wheel?
a. chemE --> kinE --> elastE
b. gravE --> chemE --> thermE
c. gravE --> kinE --> thermE
d. thermE --> kinE - -c
- 1. What is the metric unit of power?
a. joule
b. newton
c. calorie
d. gems
e. watt - -e
- What is the kinetic energy of a 18 kg bulldog running at 2 m/s?
a. 36 J
b. 72 J
c. 18 J
d. 9 J - -a
