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1. Find the temperature of a cavity having an irradiance at 200 nm that is 3.82 times the irradiance at 400 nm.
2. A 2.30 cm diameter tungsten sphere is heated to a temperature of 2000 degree C. At this temperature tungsten radiates only 30% of the energy radiated by a blackbody of the same size and temperature.
(a) Determine the temperature of a perfectly black spherical body of the same size that radiates at the same rate as the tungsten sphere.
(b) calculate the diameter of a perfectly black spherical body at the same temperature as the tungsten that radiates at the same rate.
A cubic foot of lead that weighs 700 lb is submerged in water. What is the buoyant force acting on it? The volume of one cubic foot of water weighs 62.4 lb
A spherical conducting shell has an interior radius of 18 cm and an outer radius of 21cm. The shell carries a net charge of -2.4 micro coulombs. A point charge of charge +6.4 micro coulombs is placed at the center of spherical shell.
A charge of170µC is at the center of a cube of edge40.0cm. No other charges are nearby. Find the total flux through each face of the cube
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
What is the largest wavelength that will give constructive interference at an observation point 171 from one source and 295 from the other source.
Suppose that 0.10mol of argon gas is admitted to an evacuated 50cm3 container at 20° C. The gas then undergoes isobaric heating to the temperature of 300°C. What is the final pressure of gas? What is the final volume.
A zookeeper and a monkey. The zookeeper shot a tranquilizer gun with an initial v=30m/s. The monkey was up on a tree 140m high. What is the monkeys speed during free fall
As part of a safety investigation, two 1700 cars traveling at 18 are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and t..
Consider a homemade capacitor, which consists of 2 8.5" x 11" aluminum foil sheets separated by 10 sheets of paper. Estimate the capacitance of this device. What effect does the paper have on the capacitance
A 10 kg block of ice slides along a frictionless surface that is inclined at a 60 degree angle with the horizontal. What is the weight of the block
At an instant in time, an electron has a velocity of 5i + 3j - 4k km/s in a region of space, Find the acceleration of the electron at this instant
A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 32m high. Assuming that air resistance can be ignored, find the initial speed of the rock
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