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A 650 kilogram elevator starts from rest. It moves upward for 3.5 second with constant acceleration until it reaches it cruising speed, 1.75 m/s. Evaluate the average power of the elevator motor during this period?
Light of wavelength 500.0nm appears to have a wavelength of 500.2nm when it reaches Earth from a distant star. Discover the velocity of the star if the speed of light is 3.00 x 10^8 m/s.
A motorist drives south at 28.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.20 min, find the total vector displacement
Jeff of the Jungle swings on a vine that is 7.20 long. At the bottom of the swing, just before hitting the tree, Jeff's linear speed is 8.50. Find the magnitude of his tangential acceleration
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.502, How much force is needed to keep the book moving at constant speed once it begins moving
At what average rate does the force from the cable. A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 15 {rm m}/{rm s} as the hand is 2.0 {rm m} above the ground.
two gas cylinders are identical. one contains the monatomic gas neon ne and the other contains an equal mass of the
A flywheel rotates with an angular speed of 27rev/s . As it is brought to rest with a constant acceleration, it turns 53rev . What is the magnitude of the angular acceleration
The electron concentration in a doped silicon sample at T=300K is n0 = 5x104 cm-3. Decide the whole concentration, p0. Is this material n-type or p-type? Discover the position of the Fermi level.
A vertical straight wire carrying an upward 24?Acurrent exerts an attractive force per unit length of 5.9×10?4N/m on a second parallel wire 7.5cm away
Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 4.80 N
A cannon is rigidly attached to a carriage, which can move along horizontal rails, but is connected to a post by a large spring, Determine the maximum extension of the spring
A 3.62m long organ pipe is open on both ends. the fundamental frequency is 47Hz, and Find its first three overtone frequencies
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