If the Earth's period of rotation were halved, but the period of revolution about the Sun stayed the same,
a. the night would be twice as long.
b. the night would be half as long.
c. the year would be half as long.
d. the year would be half as long.
e. the length of the day would be unchanged.
b
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Which best describes the surface of Triton?
a. old, dark and cratered with a younger surface marked by ovoids b. dark, dirty ice heavily pocked with craters c. an icy crust free of craters with a liquid water ocean beneath it d. an icy surface dominated by frozen nitrogen, methane, carbon monoxide and carbon dioxide e. an icy surface dominated by frozen methane with a liquid ocean beneath it
Consider a pipe of length L that is open at one end and closed at the other end. What are the wavelengths of the three lowest-pitch tones produced by this pipe?
A) 4L, 2L, L B) 2L, L, L/2 C) 2L, L, 2 L/3 D) 4L, 4L/3, 4L/5
Would switching your home from incandescent to compact fluorescent bulbs be a measure you would take? Why or why not? Explain your answer
What will be an ideal response?
A 20-cm length of wire is held along an east-west direction and moved horizontally to the north with a speed of 3.0 m/s in a region where the magnetic field of the earth is 60 ?T directed 30° below the horizontal. What is the magnitude of the potential difference between the ends of the wire?
a. 36 ?V b. 18 ?V c. 31 ?V d. 24 ?V e. 21 ?V