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An 8.0 cm long solenoid with cross-sectional area 0.0025 m2 has 290 turns of wire.
A 6100 kg rocket is set for vertical firing from the Earth's surface. The exhaust speed is 1400 m/s. How much gas must be ejected each second if the thrust is to equal the weight of the rocket
A spring scale is fastened to the ceiling of a railway car. When a 1.0-kg block is hung from the scale, it reads 12 N and is oriented as shown in the figure. What is the approximate acceleration of the car as measured by an observer at rest on the ..
A 25kg child swings on a playground swing. If the swing hands down 2m from the top bar, and the child swings out 10 degrees, What is the change in potential energy of the child
A child throws a rock horizontally off of a 7m building with a velocity of 17 m/s/ East. How far away from the building will the rock land
The Ulysses space probe of the Sun encountered the planet Jupiter in 1998 and returned to make a second sweep over the Sun's poles in 2000-2001. Determine the time (in seconds and minutes) it takes a radio signal to reach the Earth when the space ..
2 equal charges are separated by 52 mm and experience a repulsion force of 9 Newton. Calculate the amount of each charge in micro coulombs.
After 6 seconds of slowing down it comes to rest. The total time the object is on the incline is 16 seconds. Draw a position versus time graph and a velocity versus time graph.
An automatic weapon can fire 68 bullets per minute at V = 290 m/s. If each bullet has a mass M = 40 g, what is the average force in N on the shoulder
A group of students perform the same "Conservation of Mechanical Energy" experiment that you performed in lab by allowing a solid sphere and then a solid cylinder to roll down the ramp. The solid sphere was released from a height of 13.7 cm. From wha..
A 100 gram bead is free to slide a long a piece of 0.8 m long string ABC. the ends of the string are attached to a vertical rod at point A and B, which are o.4m apart. when the rod is rotated, BC is Horizontal and equals to 0.3m. (a) what is the t..
A ski tow operates on a 15.0o slope of length 300 meter. The rope moves at 12.0 km/h and provides power for 50 riders at one time, Find the power required to operate the tow
The head of a hammer with a mass of 1.5kg is allowed to fall onto a nail from a height of 0.70m, What is the maximum amount of work it could do on the nail
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