A cork floats in an inverted jar sitting on a cart, as shown in the left diagram below. If we suddenly accelerate the cart to the right (as shown in the right diagram) what will the cork do:
A. Lean backward
B. Remain vertically floating directly above the base
C. Lean forward
D. Sink
E. Explode
C. Lean forward
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A 1.0 kg flashlight falls to the floor. At the point during its fall when it is 0.70 m above the floor, its potential energy exactly equals its kinetic energy. How fast is it moving?
A) 3.7 m/s B) 6.9 m/s C) 14 m/s D) 45 m/s E) 9.8 m/s
You hold one end of a solid rod in a fire, and the other end becomes hot. This is an example of
a. heat conduction b. heat convection c. heat radiation d. thermal expansion e. none of the above
When the chromosphere can be seen during a solar eclipse, it appears:
A) invisible. B) violet. C) blue. D) yellow. E) red.
The main energy transformation that occurs while an electric blender is mixing your orange juice is
A) electric E ? kinetic E. B) chemical E ? thermal E. C) electric E ? chemical E. D) kinetic E ? electric E. E) thermal E ? kinetic E.