The biggest obstacle to life being present in the atmospheres of Jupiter and Saturn is the
A) absence of liquid water in their atmospheres
B) high levels of solar radiation that would destroy any biological molecules
C) strong vertical wind speeds that would rapidly carry organisms into the hot interior where they would be destroyed
D) very low temperatures at the tops of the clouds where water would not be liquid
C
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The Schwarzschild radius of a black hole depends on
A) only the mass of the black hole. B) the observationally measured radius of the black hole. C) the way in which the black hole formed. D) both the mass and chemical composition of the black hole.
If the primary of a transformer is connected to a dc power source, the transformer would have a voltage output
A) at a higher efficiency than with an ac source. B) the same. C) that is also dc. D) only while being connected or disconnected. E) none of the above
Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 300 million Americans, how many tons of aluminum need to be recycled each year if each can weighs 1/16 pound, and one ton = 2000 pounds?
a. 750,000 tons c. 1.7 million tons b. 1.5 million tons d. 3 million tons
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the wavelength of the scattered photon?
A) 0.380 nm B) 0 nm C) 0.550 nm D) 0.591 nm E) 0.595 nm