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A 100 gram granite cube slides down a 30 degree frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides (elastically) with a 190 gram steel cube at rest. Find how high above table should granite cube be released to give the steel cube a speed of 180 cm/s?
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.90 m/s at an angle of 23.0° below the horizontal. Find the height from which the ball was thrown
A cold beverage can be kept cold even on a warm day if it is slipped into a porous ceramic container that has been soaked in water. Assume that energy lost to evaporation matches the net energy gained via the radiation exchange through the top and..
A sound wave propagating in air has a frequency of 4.45 kHz. Estimate the change in wavelength when the wave, initially traveling in a region where T = 27°C, enters a region where T = 11.5°C
Derive an expression for the entropy of NE atoms of the element E adsorbed on M (per square centimeter) assuming that the adsorbing atoms have zero interaction energy with each other. They do, of course, have an interaction energy with the surf..
a conducting sphere of radius r1 carries a charge q. another conducting sphere has a radius of r2 2r1 but carries the
The sound in a classroom is 61000 times as intense as the minimum threshold of hearing. Find what is the intensity level of this sound in decibels
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
in the cathode ray tube in an old television set, electrons are accelerated from rest with a constant acceleration of magnitude 7.31*10^13 m/s2 during the first 2.77cm of tube's length; find the speed of the electron when they hit the screen
A 150-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1680 N, Find the acceleration of the rocket
An ideal spring of negligible mass is 11.00cm long when nothing is attached to it, If you wanted to store 10.0 J of potential energy in this spring, what would be its total length? Assume that it continues to obey Hooke's law
A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. What is his predicted landing velocity
A thin homogeneous plate has the shape of an equilateral triangle and is suspended from one apex, acting as a physical pendulum. Use the Lagrangian to obtain the equation of motion and find the frequency of small oscillations, assuming the motion tak..
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