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A water fall is 500m high. (a) What is the difference in temperature between the water at the top and bottom if no water evaporates while falling? (b) What fraction of the water must evaporate to keep the temperature the same?
A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 2.17 min, how many conduction electr..
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 1.85 hours. What is density of the planet
A ball thrown straight upward returns to its original level in 2.40. What is the initial speed of the second ball if it also returns to its original level in 2.40
q1. the potential difference between the plates of a capacitor is 70 v. midway between the plates a proton and an
A bicyclist rides 2.93 km due east, while the resistive force from the air has a magnitude of 8.55 N and points due west. Find the work done by the resistive force during the round trip
a man standing 1.56 m in front of a shaving mirror produces an inverted image 17.6 cm in front of it. how close to the
A refuse derived fuel consists of 50% rubber, 10% ferrous metals, and 40% dirt on a wet weight basis. what is the heat value
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
Assume you measure the terminal voltage of a 3.17 Volt lithium cell having an internal resistance of 5.20 ohm by placing a 1.00-k voltmeter across its terminals. Determine the actual terminal voltage to the nearest 0.001 Volt
A 19.2 kg block is dragged over a rough, horizontal surface bya constant force of 130 N acting at an angle of 27.3 degrees abovethe horizontal. THe block is displaced 18.3 m and the coefficient of kinetic friction is 0.173. G=9.81m/s2.
A particle leaves the origin with a speed of1 × 106 m/s at 30? to the x axis. It moves in a constant electric field E = Eyˆj. Find Ey such that the particle will cross the x axis at x = 2.5 cm if the particle is an electron. The fundamental charge is..
an airplane has a mass of 27500 kg and takes off under the influence of a constant net force of 41000 n. what is the
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