Study Guide 2 Question Preview (ID: 8111)
Study Guide For CBA #2.
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Which of the following always causes change in speed, direction, or both?
a) Balanced forces
b) Any combination of forces
c) Either balanced or unbalanced forces
d) Unbalanced forces
What happens if the forces on an object are unbalanced?
a) Its motion will not change
b) The forces will be zero
c) Either balanced or unbalanced forces
d) Its motion will change
It takes kira 36 seconds to jog to a store that is 72 meters away. What is her average speed in meters per second?
a) 2 m/s
b) 3 m/s
c) 32 m/s
d) 22 m/s
A cheetah starts running and covers a distance of 200 meters in 10 seconds. What is the cheetah\'s average speed?
a) 2000 meters per second
b) 0.05 meters per second
c) 20 meters per second
d) 250 meters per second
A ramp is an example of which type of machine
a) A wedge
b) An inclined plane
c) An axle
d) A pulley
Hot air is seen rising from the pavement on a hot summer day. Which of the following is this an example of?
a) Thermal Conduction
b) Radiation
c) Convection
d) Thermal insulation
What is the rolling motion of boiling water an example of?
a) Conduction
b) Radiation
c) Convection
d) Insulation
As a spoon in a bowl of hot soup becomes warmer, by which process is heat being transferred to the spoon?
a) Convection
b) Conduction
c) Radiation
d) Direct Contact
Which device converts chemical energy into electrical energy?
a) Toaster
b) Battery Cell
c) Light Bulb
d) Switch
A hair dryer converts what type of energy into thermal energy?
a) Kinetic
b) Potential
c) Electrical
d) Chemical
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