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An airplane propeller is rotating at 1900 rpm.
A) Compute thepropeller's angular velocity in rad/s.
B) How many seconds does ittake for the propeller to turn through 35 degrees?
C) If thepropeller were turning at 18 rad/s, at how many rpm would it beturning?
D) What is the period ( in seconds) of this propeller?
(from Roger Ordidge, with alterations) The magnetic field can store energy, but it can do 110 work. Therefore, another agency must be responsible for doing the work that puts the energy into the magnetic field.
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
An asteroid in an elliptical orbit about the sun travels at 1.0*106 m/s at perihelion(the point of closest approach) at a distance of 3.9*108 km from the sun. Howfast is it traveling at aphelion (the most distant point), whichis 8.8*108 km from the s..
A 100 kg shot-putter pushes a forward and upward force on a 4 kg shot with a force of 1000N, Calculate the vertical and horizontal components of this resultant force
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A heat engine takes in 1000 J of energy at 1000 K and exhausts 615 J at 200 K. What are the actual and maximum theoretical efficiencies of this heat engine
Two small spheres spaced 20centimetres apart have equal charge. How many excess electrons should be present on each sphere if magnitude of the force of repulsion between them is newtons.
A 24-V battery is connected in series with a resistor and an inductor, with R = 4.2 ? and L = 6.0 H, respectively. Find the energy stored in the inductor when the current reaches its maximum value
white light reflected at a perpendicular incidence from a soap film has in the visible spectrum an interference maximum
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Ball 1, with a mass of 110g and traveling at 15m/s, collides head on with ball 2, which has a mass of 300g and is initially at rest, What are the final velocities of each ball if the collision is perfectly elastic
A 64.0-kg person holding two 0.750-kg bricks stands on a 2.20-kg skateboard. Initially, the skateboard and the person are at rest. What is the recoil speed of the person
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