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A helicopter is lifting two crates simultaneously. One crate with a mass of 148 kg is attached to the helicopter by cable A. The second crate with a mass of 87 kg is hanging below the first crate and attached to the first crate by cable B. As the helicopter accelerates upward at a rate of 2.0 m/s2, what is the tension in each of the two cables?
A hollow, conducting sphere with an outer radius of 0.260m and an inner radius of 0.198m has a uniform surface charge density of +6.70×10^?6 C/m^2. What is the new charge density on the outside of the sphere
A container is filled to a depth of 19.0 cm with water. On top of the water floats a 32.0-cm-thick layer of oil with specific gravity0.600
just when charliw wants to sit down, a 240 lb bully pushes him away with a force of 450 N. what is the force exerted by charlie brown on the bully
a 1cm-tall object placed 20cm front of a concave mirror produces a virtual image that is twice the height of the object. what is the length of the mirror
A machine has an 650 g steel shuttle that is pulled along a square steel rail by an elastic cord (see figure below). The shuttle is released when the elastic cord has 16 N tension at a 45° angle
In an experiment using an inclined track with a dynamics cart, the computer failed, find the cart's acceleration, mass, and the tension in the string connecting the cart to the accelerating 50g mass
Assume that the earth is a uniform density spherical mass. (This assumption is not correct but we will use it for simplicity in working the problem.)
Water flowing in a horizontal pipe is at a pressure of 1.55 105 Pa at a point where its cross-sectional area is 6.00 m2. Find the water's speed in the wider pipe
A rectangular block of wood floats in a calm lake. Show that, if friction is ignored, when the block is pushed gently down into the water and then released
suppose a 29.9-kg child sits 1.27 m to the left of center on the same seesaw as the problem you just solved in the
A compact disk on a CD player rotates clockwise. The disk completes one revolution in 0.220 s. Find the angular velocity of the disk
a dog is walking slowly toward a motion detector. Draw a position graph that could represent this motion. Show your work.
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