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During heavy rain, a rectangular section of a mountainside measuring 2.8 km horizontally, 0.80 km up along the slope, and 2.7 m deep suddenly slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a valley section measuring 0.40 km 0.40 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above an area of 4.0 m2 in that section?
kg
A train starts at rest at a station and accelerates at a rate of 2.0 m/s^2 for 20 seconds. Then, this train runs at a constant speed for 100 seconds and slows down at a rate of 5.0 m/s^s until it stops at the next station. compute the total distan..
If the light from the spotlight strikes the mirror at an angle to the normal, what angle to the normal would you expect for the reflected rays.
A block starting atop a frictionless hemispherical dome starts sliding from rest. Write down the two equations of motion of the block in terms of r and ? (i.e. use polar coordinates).
The electric field points radially outward at all points within the sphere (and outside too, for that matter). What is the strength of the electric field at a distance r from the center, inside sphere.
What is the current in the wire.
A hot-air balloon is ascending at the rate of 14 m/s and is 57 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
7.84 g of argon gas at an initial pressure of 4.34 atm and at 16°C undergo an isobaric expansion until the volume has increased in five times. What is the volume of the gas after expansion
If the coefficient of kinetic friction between the box and the roof is 0.55, with what speed must you push the box to have it gently come to rest right at the edge of the roof.
A giant yo-yo of mass 360 kg measuring about 1.5 m in radius was dropped from a platform 60 m high, find the velocity of descent at the end of the fall
A listener increases his distance from a sound source by a factor of 3.05, what is the change in the sound intensity level in dB
a frictionless pulley which can be modeled as a 0.80 solid cylinder with a 0.30 m radius has a rope going over it. The tension in the rope is 10 N on the right side and 12 N on the left side. What is the angular acceleration of the pulley.
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with amplitude of 20.0 cm.
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