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And if the plane could fly without this pilot, how much force would the plane require to maintain the equal acceleration?
An air molecule is moving at a speed of 455 m/s. How many meters would the molecule move throughout 7ms (milliseconds) if it didn't collide with any other molecules.
Calculate the minimum angle above the horizontal at which Hiawatha must aim in order to outrun the arrow.
Coherent light that contains two wavelengths, 660 nm and 470 nm, passes by two narrow slits with a separation of 0.280 mm and an interference pattern is observed on a screen which is a distance 4.40 m from the slits.
An insulated Thermos contains 150cm3 of hot coffee at 83°C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as although..
If a car travelling at 63 km/h will skid 18 m when its brakes lock, how far will it skid if it is travelling at 150 km/h while its brakes lock.
A 75-kg trqampoline artist jumps vertically upward from the top of a platform with a speed of 5.00 m/s. (a) how fast is he going as he lands on the trampoline 3.0m below? (b) If the trampoline behaves like a spring of spring constant 5.2 x 10^4 N/..
A transverse pulse moves along a stretched cord of length 5.29 m having a mass of 0.180 kg. If the tension in the cord is 13.4 N, find the following. (a) The wave speed. (b) The time it takes the pulse to travel the length of the cord.
Find the coefficient of friction between ax and grindstone.Two negative point charges are separated by 20 rm cm and feel a mutual repulsive force of 3.35 mu N. The charge of one is three times that of the other. How much charge does each have.
Billy Dee notes that her favorite record rotates at 34 rev/min. At what speed does the point on the record touching the stylus (needle) move when the stylus (needle) is 5.9 cm from the center?
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.675 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
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