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(Kineti Energy and Work) One ar has twi e the mass of a se ond ar, but only half as mu h kineti energy. When both ars in rease their speed by 8 m/s they then have the same kineti energy. What were the original speeds of the two ars?
A VW Beetle goes from 0 to 52.0 mi/h with an acceleration of +2.35 m/s2. How much time does it take for the Beetle to reach this speed
the size of the hydrogen atom grows in proportion to n2 where n is the principal quantum number. for the atom in the n
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
a motor is designed to operate on 132 v and draws a current of 9.4 a when it first starts up. at its normal operating
A sample of an unknown material appears to weigh 290 N in air and 155 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material
A 130 g ball with speed 7.5 m/s strikes a wall perpendicularly and rebounds in the opposite direction with the same speed. find the magnitudes of the average force on the wall
A 1500 microfarad capacitor and a 5600 microfarad capacitor are connected in parallel across a 12.0 V potential difference. Determine the total energy stored in the capacitors
Light of wavelength 580 nm passes through a slit of width 0.210 mm. How far is the screen from the slit
You and your friend Peter are putting new shingles on a roof pitched at 22 degrees. If the coefficient of kinetic friction between the box and the roof is 0.54, with what speed should you push the box to have it gently come to rest right at the edg..
A 61 g red super ball traveling13 m/s EAST has an elastic collision by a 66 g blue super ball traveling 10 m/s WEST. Discover the final speeds and directions of the super balls.
A uniform cylindrical satellite has four tangential rockets. mass = 3600, radius = 4.0m, what is the required steady force of each rocket if the satellite is to reach 32 rpm in 5.0 min?
The flywheel of an engine has a moment of inertia 2.80 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
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