The best time for digging clams (when low tide is extra low) is during the time of the

A) new or full moon.
B) half moon.
C) quarter moon.
D) none of these times.


Answer: B

Physics & Space Science

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Which of the following cannot travel in a vacuum?

A) a light wave B) a sound wave C) a radio wave D) all can E) none can

Physics & Space Science

If a person in Alaska were locked out of his house on a day when the temperature outside was ?40°C, his thick clothing would mostly reduce the loss of thermal energy by

A. conduction. B. convection. C. radiation. D. all of the above. E. convection and radiation.

Physics & Space Science

How does a radio station transmit a radio signal to your ear?

A) Electrons moving in the station's antenna send out an electromagnetic wave that travels to your radio, where the wave is amplified and sent to your ear as a more intense electromagnetic wave. B) Electrons moving in the station's antenna send out an electromagnetic wave that travels to your radio, where the wave is transformed into a sound wave that travels to your ear. C) Stationary positive and negative charges residing on the station's antenna exert electrostatic forces that act on your radio, causing the radio to send sound waves to your ear. D) The station's antenna sends an electric current through a wire that runs from the radio station to your radio, causing the radio to send sound waves to your ear. E) Electrons moving in the station's antenna send out a sound wave that travels to your radio, where the wave is amplified and sent to your ear as a more intense sound wave.

Physics & Space Science

The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is



a.
D.

b.
E.

c.
F.

d.
G.

e.
H.

Physics & Space Science