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In a 30.0 s interval, 540 hailstones strike a glass window of area 0.600 m2 at an angle of 45.0° to the window surface. Each hailstone has a mass of 5.00 g and moves with a speed of 8.00 m/s.
Assuming the collisions are elastic, find the average force on the window. N
Find the pressure on the window (due to the hailstones only). Pa
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
A stone is projected at a cliff of height h with an initial speed of 45.0 m/s directed at an angle θ0 = 66.0° above the horizontal. The stone strikes at A, 5.37 s after launching. Find out (a) height h of the cliff, (b) speed of the stone just before..
A 2.30-? F capacitor is fully charged by being connected to a 6.0-V battery. The fully charged capacitor is then connected to a 0.250-H inductor.
If the cross-sectional area of the stream decreases by factor of 10× while passing through the dam, can you catch and save the weasel before it moves past the dam (X), down the waterfall?
Find an expression for the electric potential at the center. A proton is released from rest in a uniform electric field of magnitude 1.20×10^5 N/C. Find the speed of the proton after it has traveled.
What is frequency of the fork
A tree falls on a bicycle path 40 m ahead of a cyclist traveling at 16 m/s, how far from the fallen tree will she be when she stops
A Coast Guard cutter detects an unidentified ship at a distance of 20.2 km in the direction 16.7° east of north. The ship is traveling at 24 km/h on a course at 40.1° east of north. The Coast Guard wishes to send a speedboat to intercept the vesse..
an artillery shell is fired with an initial velocity of 350 m/s at 50.0 degrees measured from the horizontal. it hits the side of a mountain 35.0 seconds later. What are the x and y coordinates of the shell where it explodes, if the coordinates fr..
A car (m = 1610 kg) is parked on a road that rises 17° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
A 190 kg block is pulled at a constant speed of 4.4 m/s across a horizontal floor by an applied force of 138 N directed 37° above the horizontal. Illustrate what is the rate at which the force does work on the block?
The threshold of dark-adapted (scotopic) vision is 6 multiplied by 10-11 W/m2 at a central wavelength of 550 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 7.5mm, how many photons p..
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