What is the wavelength, in meters, of radio waves produced by a radio station with a frequency of 1400 kHz? (c = 3.00 × 10^8 m/s)
2.1 × 10^2 m
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The solar energy coming to the earth by radiation is 1,340 W/m2 when the temperature of the Sun is 5800 K. If the temperature of the Sun decreased by 10.0%, then what would be the amount of solar radiation coming to the earth?
A. 879 W/m2 B. 752 W/m2 C. 667 W/m2 D. 610 W/m2 E. 578 W/m2
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 
acquires an angular velocity of 5.00 rad/sec. The CD continues rotating at 5.00 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the total acceleration of a point 4.00 cm from the center at the time 10.0 seconds from the start?
A. 0.65 
B. 1.00
C. 1.25
D. 1.37
E. 1.86
The physics underlying the redness of sunsets and the color of blue jays involves
A) scattered sunlight. B) absorbed sunlight. C) different processes for sunsets and blue jays.
Suppose you built a scale-model atom in which the nucleus was the size of a tennis ball. About how far would the cloud of electrons extend?
A) several centimeters B) a few meters C) a few tens of meters D) several kilometers E) to the Sun