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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

When the chromosphere can be seen during a solar eclipse, it appears:

A) invisible. B) violet. C) blue. D) yellow. E) red.

Physics & Space Science

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.

Physics & Space Science