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Julie has a mass 49kg What is her potential energy when standy on the 6m diving board? what is her kinetic energy just before she hits the water.
Calculate the absorbed dose in Gy to the skin of a person which receives 1500 ergs/gm of beta radiation from a cloud of radioactive krypton-85 gas.
Two pieces of optically flat glass (n = 1.50) touch at one edge and a separated by a thin stretched fiber at the opposite edge. Light of wavelength 500 nm is shone from above and 100 dark fringes are counted. How thick is the fiber?
Each second, 5525 m3 of water flows over the 670-m-wide cliff of the Horseshoe Falls portion of Niagara Falls. How far from the base of the cliff is the barrel
A ball of mass 1.5 kg is thrown upward. It leaves the throwers hand with a velocity of 10 m/s. Calculate the average force acting on the ball
The 20-cm-long wrench in the figure swings on its hook with a period of 0.74s, What is the wrench's moment of inertia about the hook
A 92 kg man climbs onto a car worn out shock absorbers and thiscauses the car to drop down 4.5 cm. What is the mass of the car
a cubic block of quartz glass measures 0.1m on a side. what will be the increase in volume of the block if it is heated
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
Air that initially occupies 0.47 m3 at a gauge pressure of 100 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
Imagine two 2.5g bags of protons, one at the earth's north pole and the other at the south pole. How many protons are in each bag
The acceleration of gravity is 9.8 m/s2. If Fl = 16 N and Fr = 6N, what is the magnitude of the force exerted on the block with mass 8 kg by the block with mass 5 kg?
A sample of an unknown material appears to weigh 255 N in air and 195 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material
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