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Two identical blocks made of extremely hard metal collide with equal and opposite velocities. Is such a collision closer to being completely inelastic? Where does any lost kinetic energy go? Assuming it is either completely elastic or inelastic, what are the final velocities?
In a photoelectric effect experiment, visible radiation of energy 2.68 eV is incident upon a metal of unknown work function. determine the work function of the metal
a wave on a string is described by dxt3.2cm sin2pix7.2cmt0.14s1 where x is in m and t is in s .a what is the wave
An irregularly shaped object 10 long is placed with each end on a scale. how far from the left is the center of gravity
How much work is required to pull him a distance of 58.0 m up a 27.0° slope (assumed frictionless) at a constant speed of 1.80 m/s
An object is projected horizontally with a speed of 12 m/s and lands 120m from the launch site. What vertical height was it launched from
X-rays are scattered from a target at an angle of 56.0 degrees with the direction of the incident beam. Find the wavelength shift of the scattered x-rays
A duck is floating on a lake with 21% of its volume beneath the water. What is the average density of the duck
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 10 m and, in starting, rotates according to ? = 0.30t2, where t is in seconds and ? is in radians. what is the magnitude of the astronaut's angular velocity?
When the lights of an automobile are switched on, an ammeter in series with them reads 10.20 A and a voltmeter connected across them reads 12.10 V. What is the current through the starting motor
The earth's magnetic field, like any magnetic field, stores energy. The maximum strength of the earth's field is about 7.0 10-5 T. Find the maximum magnetic energy stored in the space
If a 25-gram bullet with a speed of 330 m/s travels 15 cm into a tree before stopping, what's the average force exerted to stop the bullet
A heat engine absorbs 2400 J of heat from a hot reservoir and releases 1400 J of heat to a cold reservoir each second. Find the efficiency of the engine and its mechanical power output
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