How much kinetic energy must a deuterium ion (charge 1.6 × 10^?19 C) have to approach to within 10?14 m of another deuterium ion? (1 MeV = 1.6 × 10^?13 J)
140 keV
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Polonium-215 alpha decays with a half life of 1.8 ms
(a) How much is left after 1. second? (b) What is the daughter nucleus?
A sonic boom cannot be produced by
A) an aircraft flying slower than the speed of sound. B) a whip. C) a speeding bullet. D) all of the above
A golf ball is thrown at and bounces backward from a massive bowling ball that is initially at rest. After the collision, compared to the golf ball, the bowling ball has more
A) momentum, but less kinetic energy. B) kinetic energy, but less momentum. C) momentum and more kinetic energy. D) need more information
What is the force exerted by the Sun on the earth? The mass of the Sun is 1.99 × 1030 kg, the mass of the earth is 5.97 × 1024 kg, the Earth-Sun distance is 1.50 × 1011 m, and G = 6.67 × 10-11 N m2/kg2
A) 5.28 × 1033 N B) 3.52 × 1022 N C) 8.85 × 108 N D) 7.25 × 1019 N E) 9.32 × 1011 N