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During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 kg every second. Assuming that the rain comes to rest upon striking the car (Vf = 0 m/s), find the average force exerted by the rain on the roof during a 3 second time interval.
A calorimeter contains 2000 grams of water at 0oc. a jet of stream at 100oc is passed through the water. What is the temperature of the water when 100 grams of steam have condensed in it.
Once free of this area, it speeds up to 13 m/s in 8 {rm s}. At the edge of town, driver again accelerates, with the same acceleration, for another 16 {rm s} to reach a higher cruising speed.
In an amusement park ride, cars are suspended from L = 4.29 m cables attached to rotating arms at a distance of D = 6.11 m from the axis of rotation. What is the angular speed of rotation
A spherical water drop 3.7 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 12100 N/C. find the magnitude of the gravitational force on the drop
What is the cause of Earth's magnetism? What are the conditions for a magnetic field generation?
A microphone in the ocean is sensitive to sounds emitted by porpoises. To produce a usable signal, sound waves striking the microphone must have an intensity of 10.7 dB. If porpoises emit sound waves with a power of 0.0491 W, how far can a porpois..
A small object moves at constant speed in a horizontal circle of radius 0.770 m. If the object makes two complete revolutions in one second.
Two point charges of +5.0microcolumb +8microcolumb are placed inside a cube of edge length 0.100m. What is the electric flux due to these charges
A lead cube is 15 cm per side. The cube is released from rest in a 25-m deep pool of water. Find the gauge pressure on the cube at this depth
We have a diatomic ideal gas with a y of 5/2. It starts with an initial pressure of 1kPa, an initial temperature of 100 K, and an initial volume of 10 m3. What was the work done
I've been looking around about LCD monitors, and how they polarise light. When a pixel needs to be black, the light is "twisted" so that it can't go through the polarising sheet in front. What happens to this light? Does it relfect back into the s..
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
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