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A solar furnace is a device that concentrates the sun's light on a small point to heat it up to high temperature. One can imagine that in the limit of being completely surrounded with mirrors, your entire 4? Solid angle will look like the surface of the sun, at about 6000K. The target will then heat up to 6000K and start to radiate as a blackbody, reaching thermal equilibrium with the sun.
Two equal conducting spheres are separated by a fixed center to center distance of 43.0 centimeter and have different charges. Find the initial charge on the sphere which carried a positive charge
A pulley with a radius of 10.0 cm is mounted on an axle that passes through the center of the pulley. calculate the instantaneous angular speed of the pulley
What is the ratio of potential energy to kinetic energy for a comet that has now enough energy to escape from the Sun's gravitational field?
A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis, Calculate the force of static friction exerted by the carousel on the bag
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
A 50 kilogram parachute jumper descends at a steady 40 km/h. Determine what is the force of air on the parachute
The distance from the human eye lens system and the retina is typically 19.0 mm. What is the focal length of the eye lens system for a relaxed eye
Please calculate the concentration (in moles/m^3) of oxygen in the air (21% oxygen) assuming it acts as an ideal gas at 20 degrees C. What is the average speed for such a molecule
A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the mag..
A mass spectrometer applies a voltage of 2.00 kV to accelerate a singly charged positive ion. What is the mass of the ion
She only uses the most accelerated depreciation method possible. The computer is the only personal property which she places in service during the year. Illustrate what is her total depreciation deduction for 2011?"
A projectile is fired with an initial speed of 65.2 m/s at an angle of 34.5 degrees above the horizontal on a long flat firing range. determine the maximum height reached by the projectile
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