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A cord is used to vertically lower an initially stationary block of mass M = 30 kg at a constant downward acceleration of g/5. When the block has fallen a distance d = 1.5 m, find the work done by the cord's force on the block. Find the kinetic energy of the block. Find the speed of the block.
A glass is slid across a table top, goes off the edge and falls to the floor below. With what velocity did the glass leave the table top
What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 kelvins (the temperature of the filament of a light bulb)
You come across an open container which is filled with two liquids. Since the two liquids have different density there is a distinct separation between them. what is the density of the unknown fluid
A balloon is filled with helium at a pressure of 2.4 x 10^5 pa. The balloon is at a temperature of 18 degrees C and has a radius of 0.25 m. By what factor does the radius of the balloon increase
You see the boy next door trying to push a crate down the sidewalk. He can barely keep it moving, and his feet occasionally slip. Estimate the mass of the crate
What is the ideal banking angle for a gentle turn of 1.80 km radius on a highway with a 110 km/h speed limit (about 68 mph), assuming everyone travels at the limit
an object of some undetermined material and mass is suspended by a spring of unknown spring constant. The spring is elongated by 2.7 cm when the object is attached to its end.
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
The Millenium Falcon is chased by the Imperial Forces. The ship is moving at a speed of 0.615 c. What is the velocity of the protons in the resting frame when the cannon is shot in the backward direction
For a dispersing prism with an index of 1.5 and an apex angle of 60 degrees, find the minimum angle deviation of light through the prism
A jet flying at 107 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, Calculate the magnitude of the necessary lifting force
Examining your image in a convex mirror whose radius of curvature is 24.8cm , you stand with the tip of your nose 10.2cm from the surface of the mirror. Where is the image of your nose located
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