Which of the following has the smallest albedo?
a. Water
b. Polar ice
c. Fresh snow
d. Dry sand
a
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If a wave's frequency doubles and its speed stays constant, its wavelength
A) becomes 16× longer. B) is also doubled. C) is unchanged, as c is constant. D) is now 4× longer. E) is halved.
What magnitude net force is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
A) 1620 N B) 11800 N C) 4360 N D) 444 N E) 3240 N
A circular loop (area = 0.20 m2) turns in a uniform magnetic field with B = 0.13 T. At an instant when the angle between the magnetic field and the normal to the plane of the loop is (?) rads and is decreasing at the rate of 0.50 rad/s, what is the magnitude of the emf induced in the loop?
a. zero b. 13 mV c. 26 mV d. 20 mV e. 18 mV
The Sun is powered by the proton-proton cycle
Indicate whether the statement is true or false