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Earth's atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. If the protons all passed through the atmosphere, assume that each square meter of Earth's surface would intercept protons at the average rate of 1200 protons per second. What would be the electric current intercepted by the total surface area of the planet?
A photographic image of a building is 0.0920 m high. The image was made with a lens with a focal length of 55.0 mm. determine the height of the building.
The work fuction of a particular substance is 7.81*10^-19 J. What is the photoelectric cutoff wavelength for this material
A major artery has a cross sectional area of 1.07 cm^2. What is the average speed of blood flowing through the smaller arteries
A polarized light beam, with a 7.33-mm-diameter circular cross section, is perpendicularly incident on an ideal polarizer, What force in piconewtons does the light exert on the polarizer
Determine the third particle's speed and direction.
A 1.80x10^2 kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.00 m above the ground. The crane that is doing the lifting produces a steady power of 4x10^2 W. How much time does it take to lift piano.
What is a limiting angle of resolution
The skis have a thrust of 200. Sam's speed at the bottom is 43.0. Illustrate what is the coefficient of kinetic friction of his skis on snow?
When a current flows in an aluminum wire of diameter 2.45 mm, the drift speed of the conduction electrons is 1.05 × 10-4 m/s. What is the electron current in the wire
A stunt man whose mass is 70 kg swings from the end of a 3.10 m long rope along the arc of a vertical circle. Assume that he starts from rest when the rope is horizontal; find the tensions in the rope that are necessary to make him follow his circ..
Two capacitors, C1 = 30 µF and C2 = 4.0 µF, are connected in parallel and charged with a 110 V power supply. Calculate the total energy stored in two capacitors
Evalute the acceleration of each block and the tension in the string? Repeat the problem, adding a coefficient of kinetic friction between each block and the surface of 0.10.
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