The potential energy of an 80 kg male and a 60 kg female standing together on a promontory at some height above the surrounding plane is the same
What will be an ideal response?
No, because the potential energy depends on the weight (and, therefore, on the
mass) as well as on the position relative to a reference position.
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Velocity Addition: Two spaceships approach Earth from the same direction. One has a speed of 0.21c and the other a speed of 0.34c, both relative to Earth. What is the speed of one spaceship relative to the other?
A. 0.13c B. 0.14c C. 0.15c D. 0.16c E. 0.18c
An explosion occurs 34 km away. For sound that travels at 340 m/s, you'll hear the explosion in
A) 0.1 s. B) 1 s. C) 10 s. D) 20 s. E) more than 20 s.
A car with closed windows makes a left hand turn. A helium-filled balloon in the car moves to the
A) right. B) left. C) front. D) back. E) none of the above
A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?
a. 2.8 b. 1.7 c. 1.3 d. 4.0 e. 1.0