A 2.0-kg mass moving at 5.0 m/s suddenly collides head-on with a 3.0-kg mass at rest. If the collision is perfectly inelastic, what is the speed of the masses just after the collision?
A) 10 m/s
B) 2.5 m/s
C) 2.0 m/s
D) 0 m/s, since the collision is inelastic
C
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a. True b. False Indicate whether the statement is true or false
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What is the symbol for the nuclide with 38 protons and 50 neutrons?
a. 
b. 
c. 
d. 