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Find what water pressure must a pump that is placed on the first floor supply to have water one the thirteenth of a building with a pressure of 35 lb\in 2 suppose that the distance between each floors is 10ft.
When the crate is moving, the frictional force between the floor and the crate has a magnitude of 122.0 N. If the crate starts from rest, explain how fast will it be moving after the man has pulled it a distance of 2.30 m?
a bungee cord is 30.0 rm m long and when stretched a distance x it exerts a restoring force of magnitude kx. your
The New England Merchants Bank Building in Boston is 152 m high. What is the total distance, side to side, that the top of the building moves during such an oscillation
a coffee-maker contains a heating element that has a resistance of 44 omega. this heating element is energized by a
A student drops two metallic objects into a 32 g steel container holding 169 g of water at 29C. One object is a 486 g cube of copper that is initially at 58C, and the other is a chunk of aluminum that is initially at 6.9C. To the student’s surpris..
the nucleus of 8be which consists of 4 protons and 4 neutrons is very unstable and spontaneously breaks into two alpha
The tension in a guitar string is increased by a factor of two. by what factor does the wave velocity change
A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 4.0 H) are connected in series across a 240 Hz AC source for which ?Vmax = 145 V. evaluate the phase angle between the current and voltage
A certain laser outputs pure blue light (photon energy 3.1 eV) with power 400 milliwatts (0.4watts). How many photons per second does this laser emit
Women often suffer from back pains during pregnancy. Let usinvestigate the cause of these back pains, assuming that thewoman's mass is 60kg before pregnancy.
ball a is dropped from the top of a building of height h at the same instant that ball b is thrown vertically upward
question1a rifle is expected horizontally at a target 28m away. the bullet hits the target 2.7 cm below the aiming
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