Jennifer bungee-jumps from a bridge (event A). Jennifer’s bungee cord is perfectly elastic, so she bounces exactly back up to the bridge and lands on her feet (event B). The time between these events is measured by Jennifer’s watch, a stopwatch held by Jennifer’s friend, Rob, who is standing on the bridge, and by two passengers (one present at event A and one present at event B) who are riding on a train traveling at a constant velocity across the bridge at the time (the passengers have synchronized watches and compare readings later). Assuming the earth’s frame is inertial, who measures
(a) the longest time interval between these events?
A. Jennifer
B. Rob
C. The train passengers
C. The train passengers
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A proton moving at 3 × 10^4 m/s is projected at an angle of 30° above a horizontal plane. If an electric field of 400 N/C is directed downwards, how long does it take the proton to return to the horizontal plane? (HINT: Ignore gravity.) [mProton = 1.67 × 10^-27 kg, qProton = +1.6 × 10^-19 C.]
Gamma Rays are a type of electromagnetic radiation
Indicate whether the statement is true or false
An intermediately wound barred spiral galaxy would, in Hubble's system, be:
A) BS2. B) BSE.5. C) SBb. D) S2B. E) SIrr.
A magnetic field of 2.00 T is applied to a bubble chamber to make the tracks of protons and other charged particles identifiable by the radius of the circles they move in. If a high-energy proton moves along an arc of a 3.30-m circle, what is the momentum of the proton? [q = 1.60 × 10^?19 C, m = 1.67 × 10^?27 kg]