Consider the possibility that a neutron could decay into a proton and a pion. What, if any, of the following conservation laws would this process violate?
A) conservation of baryon number
B) conservation of energy
C) conservation of charge
D) conservation of lepton number
E) None of the above laws would be violated.
B
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On its way to Jupiter, Galileo also gave us close-ups of:
A) Mars and Venus. B) Ceres and Vesta. C) Gaspra and Ida. D) Mathilde and Eros. E) Mercury and Venus.
Two spaceships approach each other along a straight line at a constant velocity of 0.988c as measured by the captain of one of the ships. An observer on Earth is able to measure the speed of only one of the ships as 0.900c
From the point of view of the observer on Earth, what is the speed of the other ship?
What prevents Titan from being a candidate for supporting an evolution of life? a. It is too far from the Sun
b. Its atmosphere doesn't contain the right mixture of elements. c. Its surface is covered in methane lakes. d. Its surface temperature is too cold. e. It is tidally locked to Saturn rather than the Sun.
The mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is
A) 4 kg. B) 12 kg. C) 16 kg. D) 144 kg. E) none of these