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A transverse periodic wave is established on a string. The wave is described with the expression: y = 0.05 sin(20.0x - 2nft) Where y is in meters when x and t are in meters and seconds, respectively. If the wave travels by a speed of 20.0m/s, what is its frequency, f?
A 0.80 -long metal rod is dropped vertically onto a marble floor. When the rod strikes the floor, it is determined electronically that the impact produces a 5 kHz-tone. What is the speed of sound in the rod?
a heavy flywheel rotating on its central axis is slowing down because of friction in its bearings. find its rotational speed at the end of the second minute
A child throws a stone horizontally from the top of a 15 m cliff with a speed of 10 m/s. If the stone weighs 2 N, find its kinetic energy and speed
An ion has a mass of 3.74 x 10-26 kg and a charge of+6e. What is the magnitude of the electric field that will balance the gravitational force on the particle?
q1. runner a is at first 5.4 km west of a flagpole and is running with a constant velocity of 2.6 kmh due east. runner
The truck slows down uniformly with an acceleration of 5.60 m/s2 for 4.20 s, making skid marks 62.40 m long that end at the tree. With what speed does truck then strike the tree.
You have a pulley 13.8 cm in diameter and with a mass of 2.1 kg. You get to wondering whether the pulley is uniform. What is the moment of inertia if the pulley is uniform
An object is initially placed on the optical axis 27.1 cm to the left of a convex lens that has a focal length of 14.7 cm. The image is real and inverted. what is the new image distance
A box with mass 7.0 kg is sliding down a frictionless ramp that is 2.6 m long and inclined at 33 deg. above the horizontal. how long will it take to reach the bottom of the ramp
A heat engine operates between a reservoir at 28°C and one at 432°C. What is the maximum efficiency possible for this engine
a transparent oil with index of refraction 1.29 spills on the surface of water index of refraction 1.33 producing a
an apple crate with a weight of 375 N accelerates along a frictionless surface as the crate is pulled with a force of 19.5 N. what is the horizontal acceleration of the crate
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