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A tennis ball has a mass of 0.056 kilogram and is moving horizontally to the right at 29.3 m/s toward the racquet. The tennis ball is struck by the racquet and leaves it horizontally but in the opposite direction at 37.9 m/s. Suppose that the ball and the racquet remain in contact with each other for 832.3 milliseconds. Evaluate the average force of racquet on the ball.
A person weighs 670N steps onto a spring scale in the bathroom, and the spring compresses by 0.79 cm. What is the spring constant? And what is the weight of another person who compresses the spring by 0.34 cm.
light of wavelength 5.0 x 10 ^-7 meter in air hits a double slit. Distance between slits is 4.0 x 10^-4 m Distance to screen is 2.0 m, Determine wavelength of light in water
Your physics TA has a far point of 0.711 m from her eyes and is able to see distant objects in focus when wearing glasses with a refractive power of ?1.47 D. Determine the distance between her glasses and eyes
A ball thrown straight up at an initial speed of 14.0m/s reaches a maximum height of 7.6m. What fraction of the ball's initial kinetic energy is dissipated by air resistance as the ball moves upward?
A particular wire has a resistivity of 3.5 ? 10-8 ·m and a cross-sectional area of 3.9 ? 10-6 m2, What length of wire is required
the electric potential at a position located a distance of 18.9 mm from a positive point charge of 8.70times10-9c and
when a 7.5 cm long pencil is arranged perpendicular to a convex mirrors optical axis at a distance of 25 cm from the
A van with a mass m(v) moves along a frictionless road at v0 m/s when some heavy luggage is added to the top that weighs m(l) onto the roof
A 1.30 kg block rests on the icy surface of a frozen pond, which you can suppose to be frictionless. If the location of the block is measured to a precision of 0.90 cm, what is the minimum uncertainty in the block's speed, assuming the mass is known ..
A traffic controller at the airport watches a commercial plane circling above at a distance of 16.0 km as the pilot waits for clearance to land
Two masses are attached to strings wound around a double pulley as shown. The double pulley has a total mass of 1200g (1.2kg), Calculate the angular acceleration of the double pulley
A package falls out of an airplane that is flying in astraight line at a constant altitude and speed. If you could ignorethe air resistane, what would be the path of the package asobserved by the pilot
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