Consider a student whose mass is 70 kg. If all his mass were converted to electrical energy, for how many years could he keep a 100-W light bulb burning? (c = 3.0 108 m/s)
What will be an ideal response?
Question 2
A proton, moving west, enters a magnetic field. Because of this magnetic field the proton curves upward. We may conclude that the magnetic field must have a component
A) towards the west.
B) towards the east.
C) towards the south.
D) towards the north.
E) downward.