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Water starts moving at 10 meters per second at the top of the hill at a pressure of 1 atm. It moves down a pipe and exits at the bottom. The change in height is 5 meters. If the radius of the pipe at the top is 0.1 meters and the radius of the pipe at the bottom is 0.3 meters, what is the pressure and velocity of the water at the bottom of the hill?
A small, 2.10 g plastic ball is suspended by a 20.0 cm long string in a uniform electric field E = 5.60×103 i N/C, If the ball is in equilibrium when the string makes a 15.0o angle with the vertical
The tension in a copper wire of length 0.5 m with two ends fixed is 200 N. What is the tensile stress if the cross sectional area is 4.0 mm^2
Dan is gliding on his skateboard at 4.00m/s . He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
Suppose a formula for gain in heat energy of an object is H = m(A - B), where m = mass and (A - B) is its rise in temperature between A degrees and B degrees (as in #4). Write an expression for the absolute uncertainty, delta-H, in terms of m, del..
A 80-g bullet is fired from a rifle having a barrel 0.582 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 14100 + 9100x - 24250x2, where x is i..
An insect 5.50mm tall is placed 25.0cm to the left of a thin planoconvex lens. The left surface of this lens is flat, Calculate the size of the image
A 14.1-g bullet is accelerated from rest to a speed of 793 m/s in a rifle barrel of length 66.9 cm. (a) Find the kinetic energy of the bullet as it bullet as it leaves the barrel.
At the center of a 62-m-diameter circular ice rink, a 86 kg skater traveling north at 2.75 m/s collides with and holds onto a 50 kg skater who had been heading west at 3.58 m/s
The intensity of an electromagnetic wave is 8 x 10^7 W/m^2. What is the amplitude of the magnetic field of this wave
Two long parallel wires carry currents of 3.85 A and 4.31 A. The magnitude of the force per unit lengh acting on each wire is 3.77 Ã- 10-5 N/m
Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 469 rev/s. A point on one of the blades traces out a circle with a radius of 0.639 m as the blade rotates. What is the m..
A small airplane flies with a speed relative to the ground (ground speed) of 212.0 km/h in a direction 19.0 degrees to the east of north. what is the speed of the wind
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