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During a severe storm in Palm Beach, Fla., on January 2, 1999, 33 inches of rain fell in a period of nine hours. Assuming that the raindrops hit the ground with a speed of 12 m/s, estimate the average upward force exerted by one square meter of ground to stop the falling raindrops during the storm. (Note: One cubic meter of water has a mass of 1000 kg.)
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A standing wave on a 75.0cm long string has three antinodes. The Wavelength is .50m. If the string has linear mass density 3.78×10?5kg/m and tension 10.5N , what are the wave's frequency
A constant net force of 75N acts on an object initially at rest as it moves through a parallel distance of 0.60m. What is the final kinetic energy of the object
A 0.140 kg baseball is thrown horizontally with a velocity of 28.9 m/s. It is struck with a constant horizontal force that lasts for 1.85 ms, What was the magnitude of the horizontal force
Two concentric spheres of radii a and b> a have equal and oppposite charge Q when the potential diffrence between them is V. What is the capacitance of the spheres
A transparent oil with index of refraction 1.15 spills on the surface of water (index of refraction 1.33), determine the thickness of the oil slick
A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, After the collision, the velocity of the combined bodies is
Early black-and-white television sets used an electron beam to draw a picture on the screen. The electrons in the beam were accelerated by a voltage of 3.0 kV, What is the speed of electrons in the beam
A scuba diver at a depth of 42.0 m below the surface of the sea off shores of Panama City, where the temperature is 7 °C, releases an air bubble with volume 18 cm3.
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, and hits the ground one second after that. how tall is the building? how fast did the ball strike the ground?
An RLC circuit with R = 20.4? , L = 355mH , and C = 48.8?F is connected to an ac generator with an rms voltage of 21V, Determine the average power delivered to this circuit when the frequency of the generator is twice the resonance frequency
In daily life we see many cases of people who are caught misrepresenting things and who soon after that are excused and accepted by their contemporaries. How is this different in science.
A 50g marble moving at 2.2m/s strikes a 30g marble at rest. Assume the collision is perfectly elastic and the marbles collide head-on. A.What is the speed of the first marble immediately after the collision? B.What is the speed of the second marbl..
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