A locomotive is pulling 19 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg
If the train is accelerating at 0.22 m/s2 on a level track, what is the tension in the coupling between the second and third cars? (The car nearest the locomotive is counted as the first car, and friction is negligible.)
140,000 N
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The speed of sound through the ground is about 6.0 km/s while the speed of sound in air is 343 m/s. A very powerful explosion occurs some distance away and you feel the ground vibrate 60 seconds before you hear the sound of the explosion
How far away is the explosion? A) 20 km B) 22 km C) 25 km D) 27 km E) 30 km
A solenoid consists of 100 circular turns of copper wire. Parts of three turns, A, B and C, are shown below
When a current flows through the coil,
a.
both A and C are repelled by B.
b.
A is attracted to B; C is repelled by B.
c.
neither A nor C is attracted to or repelled by B.
d.
A is repelled by B; C is attracted to B.
e.
both A and C are attracted to B.
Determine the charge on the wool or fur after it has been used to rub a rubber rod
Two particles collide, one of them initially being at rest. Is it possible for both particles to be at rest after the collision?
a. If the collision is perfectly inelastic, then this happens. b. If the collision is elastic, then this happens. c. This can happen sometimes if the more massive particle was at rest. d. No.