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You are practicing throwing darts in your dorm. You stand 3.33 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at a point 1.84 m above the ground. The dart strikes the board at a point 1.61 m from the ground.
a) Calculate the time of flight of the dart.
b) Calculate the initial speed of the dart
c) Calculate the speed of the dart when it hits the board
After falling from rest from a height of 28 m, a 0.46 kg ball rebounds upward, reaching a height of 18 m. If the contact between ball and ground lasted 1.7 ms, illustrate what average force was exerted on the ball?
LC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. which is in the audible range of frequencies
What is the total charge of all the electrons in a 16 kg bar of iron, What is the net charge of the bar if it managed to get rid of 2% of the electrons
What intensity level of the horn's sound is observed by somebody waiting at an intersection 58m from the train.
The air-track carts in the figure are sliding to the right at 1.0 m/s. The spring between them has a spring constant of 120 N/m and is compressed 4.5 cm. Compute the speed of the air track carts held by a string together.
imagine that you spill a cup (250 g) hot water, initially at 75 C, onto the cold ground on a winter fay, Calculate the net change in the entropy of the universe due to this process, and comment on the result
Suppose that the spring is ideal and that the distance by which the spring is compressed is negligible compared to H.
Determine the efficient spring constant of the molecule
The work function for a metal surface is 5.22 eV. What is the largest wavelength of light in nm that will produce photoelectrons from this surface
A perfectly insulated system has work done by it at a rate of 13 W. At what rate is the internal energy of the system changing?
A 10,000 kg railroad car is rolling at 2 m/s when a 400 kg load of gravel is suddenly dumped in. What is the railroad cars speed just after the gravel is dumped in.
What horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer.
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