Lydia proposes to send an interstellar probe off in stages. The first stage, traveling radially outward at 0.500c relative to Earth, will send off a second stage traveling in the same direction as the first stage at a speed of 0.500c relative to the first stage. Finally, the second stage will send off a third stage traveling in the same direction at 0.500c relative to the second stage. Relative
to Earth, the speed of the third stage will have a magnitude of
a. 0.500c.
b. 0.800c.
c. 0.929c.
d. 0.972c.
e. 1.500c.
c
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A 3.0-kg and a 5.0-kg box rest side-by-side on a perfectly smooth, level floor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, and, as a result, both boxes slide along the floor
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A group of 1.0-?F, 2.0-?F, and 3.0-?F capacitors is connected in parallel across a 24-V potential difference (a battery). How much energy is stored in this three-capacitor combination when the capacitors are fully charged?
A) 1.7 mJ B) 2.1 mJ C) 4.8 mJ D) 7.1 mJ