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A dockworker loading crates on a ship finds that a 22 kg crate, initially at rest on a horizontal surface, requires a 73.2 N horizontal force to set it in motion. However, after the crate is set in motion, a horizontal force of 52 N is required to keep it moving with a constant speed. Find the coefficient of static and kinetic friction between the crate and the floor. The acceleration of gravity is 9.8 m/s^2. Please show work.
A ball is launched directly upward from the ground level with an initial speed 24 m/s. What is the greats height reached by the ball
You wish to reduce the intensity of a beam of 1-MeV gamma rays from 5.12 x 10^7 per second to 2 x 10^5 per second. What thickness of aluminum is required
A 220 kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, What fraction of the power carried by the line in this
A gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
Find the Lagrangian corresponding to the Hamiltonian. Find an equivalent Lagrangian that does not depend on time. What isHamilton corresponding to this second Lagrangian? What is the relation between the two Hamiltonians?
A vented tank of large cross-sectional area has a horizontal pipe .12m in diameter at the bottom. The tank holds a liquid whose density is 1500 kg/m^3 to the height of 4.0 m.
q1. a simple harmonic oscillator consists of a block of mass 1.80 kg attached to a spring of spring constant 107 nm.
A tire is filled with air at15°C to a gauge pressure of 210kPa. If the tire reaches a temperature of 36°C, what fraction of the original air must be removed
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
An inductor has an inductance of 0.013 H. The voltage across this inductor is 20 V and has a frequency of 470 Hz. What is the current in the inductor
A satellite is put in a circular orbit about Earth with a radius equal to 45% of the radius of the Moon's orbit. What is its period of revolution in lunar months
In an RLC circuit, the following three elements are connected in series: a resistor of 45.0 ?, a 21.0-mH inductor, and a 0.450-µF capacitor. Find the power factor for the RLC series circuit
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