An alpha particle (m = 6.7 × 10^-27 kg, q = +3.2 × 10^-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA - VB
a. +4.2 V
b. -4.2 V
c. -9.4 V
d. +9.4 V
e. -8.4 V
B
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What will be an ideal response?
What was the primary role of dust in the formation of the solar system?
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A 20-g bullet moving at 1000 m/s is fired through a one-kg block of wood emerging at a speed of 200 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?
a. 0 J c. 9.5 kJ b. -9.5 kJ d. -18 J