A satellite, initially at rest in deep space, separates into two pieces, which move away from each other. One piece has a rest mass of 190 kg and moves away with a speed 0.280c,
and the second piece moves in the opposite direction with a speed 0.600c. What is the rest mass of the second piece?
A) 88.7 kg B) 68.8 kg C) 79.6 kg D) 52.7 kg E) 73.9 kg
E
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If the relative mass of a pingpong ball is 1/20 that of a golf ball, how many pingpong balls would you need to equal the mass of two golf balls?
A) 40 B) 20 C) 24 D) 100 E) 6.022 × 1023
The Big Bang produced all the observed helium that we see today.
Answer the following statement true (T) or false (F)
An 80-eV electron impinges upon a potential barrier 100 eV high and 0.20 nm thick
What is the probability the electron will tunnel through the barrier? (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 0.011% B) 1.1% C) 0.11% D) 1.1 × 10-4 % E) 7.7 × 10-10 %
__________ refers to turning motion around a body's axis whereas ___________ refers to motion of a body around a point
Fill in the blank(s) with correct word