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The surface between a 12kg block , the 16kg wedge and between 16 kg wedge and the horizontal plane are smoothe ( without friction). The acceleration of gravity is 9.8 m/s, A block is released on the inclined plane(top side of the wedge).
What is the force F which must be exerted on the 16 kg block in order that the 12 kg block does not move up or down the plane?
Calculate the per capita energy use for China and India. The populations of each country should be obtained from reliable sources. Express your final answer in units of kcal per day per person.
Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, hip's speed at impact is about 2. If this can be reduced to 1.30 or less, hip will usually not fracture. One way to do this is by wearing elasti..
Pennies today are copper-covered zinc, What are the total positive charge and total negative charge in a solid copper penny that is electrically neutral
Students in a physics lab are to determine the specific heat of copper experimentally. They place 0.150 kg of copper shot into boiling water, what is the specific heat of copper
A worker drops a wrench from the top of a tower 88.00 m tall. With what velocity does the wrench strike the ground? (Suppose the positive direction is upward.)
A charge of -270e is uniformly spread through the volume of a sphere of radius 2.10 cm. What is the volume charge density in that sphere
In the Michelson-Morley experiment, a null result, or a net fringe shift of ΔN = 0 was obtained when the Michelson interfero meter was rotated by 90°.
Jeffery drills a very tiny hole in a sheet of brass. The hole is 0.001 inches in diameter. How large an Airy disk spot of red will form on a screen
A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handl..
Estimate how long it will take to heat a cup of soup. What is the net force exerted on the skier.
If a bullet is fired vertically upwards with the speed calculated in (b), what is the maximum height that the bullet can reach.
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
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