The Milky Way Galaxy is forming about ten stars per month
Indicate whether the statement is true or false
FALSE
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Plutonium-239 and uranium-235 undergo fission when bombarded by
a. protons. b. neutrons. c. alpha particles. d. electrons.
Which of the following is a difference between Saturn and Jupiter?
A) Unlike Jupiter, Saturn is rich in hydrogen and helium. B) Saturn has more liquid metallic hydrogen than Jupiter. C) Belts and zones on Saturn are less visible than on Jupiter. D) Unlike Jupiter, Saturn radiates more energy than it receives.
Resistance and Resistivity: The length of a certain wire is doubled and at the same time its radius is reduced by a factor of 2. What is the new resistance of this wire?
A. It is 2 times as large. B. It is 4 times as large. C. It is 6 times as large. D. It it 8 times as large. E. It is ½ as large.
Two masses are suspended by cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, 
has a mass of 5.0 kg and the other mass,
has a mass of 3.0 kg. The acceleration of 
is
A. 3.3 
upward.
B. 3.3 upward.
C. 2.5 upward.
D. 2.5 upward.
E. 1.1 upward.