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A 900 kg crate is on a rough surface inclined at 30 degrees. A constant force P=7200N is applied horizontally to the crate. While this force pushes the crate a distance of 3 m up the incline, its velocity changes from 1.2 m/s to 2.3m/s. How much work does friction do during this process.
The distance between two telephone poles is 44.5 m. When a 1.00-kg bird lands on the telephone wire midway between the poles, How much tension does the bird produce in the wire
a greased pig is at the top of a 3m high frictionless hill moving at a speed of 5m/s. what is the pig's speed when it gets to the bottom of the hill
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
question1babe didrikson holds the world record for the longest baseball throw 296 ft by a woman. for the next questions
In the Bohr model of the hydrogen atom, an electron in the 1st excited state moves at a speed of 2.19 *10^6 m/s in a circular path having a radius of 5.29*10^-11 m
The de Broglie wavelength is lambda = h/p, but the momentum of a relativistic particle is not mv. what is the electron's de Broglie wavelength
A cannon fires up at an angle of 30 degrees above the horzontal with a muzzle velocity of 40 m/s. How far from the base of the wall dos the cannon ball travel
Consider a reactor where the intake water is at 18degrees C. State regulations limit the temperature of the output water to 30degreesC so as not to harm aquatic organisms.How many liters of cooling water have to be pumped
A 4.7 kg block moving at 4.7 m/s makes a head-on elastic collision with a stationary block of mass 3.9 kg. Find the kinetic energy of the system after the collision
Suppose 7.31 mol of an ideal diatomic gas, with molecular rotation but not oscillation, compute the energy transferred as heat Q
What is the net electric flux through the spherical surface
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise
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