In the previous question, just before hitting the ground, what is the final speed of the heavy stone compared to the light one?
a) quarter as much
b) half as much
c) the same
d) twice as much
e) four times as much
Ans: c) the same
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A rocket develops 10,000 N of thrust at liftoff. If the speed of the ejected fuel is 2000 m/s, at what rate (in kg/s) must the fuel be ejected?
What will be an ideal response?
A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +15 V b. ?15 V c. ?33 V d. +33 V e. ?20 V
The mass of Pluto is 1.31 × 1022 kg and its radius is 1.15 × 106 m. What is the acceleration of a freely-falling object at the surface of Pluto if it has no atmosphere? (G = 6.67 × 10-11 N ? m2/kg2)
A) 0.661 m/s2 B) 9.81 m/s2 C) 1.62 m/s2 D) 3.72 m/s2 E) 0.140 m/s2
The time before the Phanerozoic eon is collectively called ______________ time
Fill in the blank(s) with correct word