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A family ice show is held at an enclosed arena. the skaters perform music with level 800 dB. this level is too loud for your baby, who yells at 75.0 dB. what is the total sound intensity that engulfs your?
The expanding gases that leave the muzzle of a rifle also contribute to the recoil. A .30 caliber bullet has mass 7.20×10?3kg, Find the momentum of the propellant gases in a coordinate system attached to the earth as they leave the muzzle of the rifl..
A speed skater moving across frictionless ice at 8.1{\rm m}/{\rm s} hits a 6.0{\rm m} -wide patch of rough ice. What is her acceleration on the rough ice
A helicopter is ascending vertically with a speed of 5.73m/s . At a height of 114m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the hel..
q1. a space vehicle is coasting at a constant velocity of 28.5 ms in the y direction relative to a space station. the
Two ice skaters push off of one another. Paul has a mass of 65 kg and an acceleration of 5 m/s2 south. Tom has a mass of 75 kg, what is his acceleration
If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.05o. What is the spacing between reflecting planes in the crystal
A small block with mass 0.0525kg slides in a vertical circle of radius 0.0750m on the inside of a circular track. What is the magnitude of the normal force that the track exerts on the block when it is at the top of its path
A 0.350 kg air-track glider is attached to each end of the track by two coil springs. Find the effective spring constant of the system
The index of refraction of rock salt is about 1.52. What is the speed of light in rock salt
A 0.17- kg block on a wooden table is given a sharp blow with a hammer. The block then slides across the table to a stop. How far does the block go
Suppose the solenoid filled with a paramagnetic substance such as liquid oxygen. Qualitatively,how will this change your your answer to Part (b)? Will your reply increase, decrease,or remain the same.
A 0.55 kg air cart is attached to a spring and allowed to oscillate. You are given the displacement of the air cart from equilibrium to be x = (19.7 cm) cos[(2.64 s-1)t + ?]. Find the maximum kinetic energy of the cart
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