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A thin lens forms an image of an overhead electric lamp on a piece of paper. The distance to the lamp from the lens is 148 cm; the distance to the paper from the lens is 16.0 cm. What is the focal length of the lens?
A sealed container holds .020 moles of ideal nitrogen gas at a pressure of 1.5 atmospheres and a temperature of 290 K. What is the approximate mass density of the gas
A rocket of mass 3.95 × 105 kg is in flight near earth's surface. Its thrust is directed at an angle of 54.7° above the horizontal, compute the direction of the rocket's acceleration
A proton beam in an accelerator carries a current of 105 µA. If the beam is incident on a target, how many protons strike the target in a period of 29.0 s
A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.23 × 102 kW. If the intensity of the sound at a distance of 40.3 m from the engine is 15.8 W/m^2 calculate the corresponding sound intensity level in dB
A spaceship of mass 2.3×10^6kg is cruising at a speed of 6.0×10 ^6m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the direction of the third piece
You have available lenses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. what is the maximum magnification you could achieve
A student sits at rest on a piano stool that can rotate withoutfriction. The moment of inertia of the student -stool system is4.1kg.m2.
The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 361000 rpm. Calculate the angular acceleration produced by the drill
A man and a boy carry a canoe 5.80 m long and weighing 371 N. The canoe is held overhead in a horizontal position. How far from the opposite end should the man stand
Catching a wave, a 58 kilogram surfer starts with a speed of 1.3 m/s, drops through a height of 1.80 meter, and ends with a speed of 8.2 m/s. Find how much non conservative work was done on the surfer
a uniform rod of length 200cm is bent at its midpoint into a right angle. then the bent rod is placed along the
A 50.0 g copper calorimeter contains 200 g of water at 20.0°C. How much steam must be condensed into the water if the final temperature of the system
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