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A boy on the edge of a vertical cliff 20 m high throws a stonehorizontally outward with a speed of 20 m/s. It strikes the grounfat what horizontal distance from the foot of the Cliff? Use g=10m/s2.
A plank 2.00 cm thick and 12.4 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m, find the shear modulus of the wood
A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find out the two smallest possible nonzero values for the thickness of the layer.
A 1200 kg automobile crashes into a brick wall, collapsing thefront end 1.5 meters. If the averge retarding force applied by the brick wall to the automobile is 2000 N through out the entire time of crash, what was the speed of the automobile just..
When a diverging lens is held 13cm above a line of print, asin Fig 26.29, the image is 5cm beneath the lens. What is the focal length of the lens
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
Suppose you point a pinhole camera at a 15-m-tall tree that is 75m away. If the film is 22cm behind the pinhold, what will be the size of the tree's image on the film
In Mexico, a courageous diver runs horizontally off the edge of a sea side cliff 48.8 m above the sea (about six stories high). Calculate her speed and direction angle of her velocity as she hits the water(or rocks)
On a frictionless table, a glob of clay of mass 0.24 kg strikes a bar of mass 1.34kg perpendicularly at a point 0.38m from the center of the bar and sticks to it. If the bar is 1.14 m long and the clay is moving.
A test tube standing vertically in a test tube rack contains 2.2 cm of oil, What is the gauge pressure on the bottom of the tube
A lead sinker of mass 225 grams and density of 11.3 g/cm3 is attached to the bottom of a wooden block of mass 25 grams and density 0.5 g/cm3
a basketball is thrown horizontally with an initial speed of 4.50 ms. a straight line drawn from the release point to
a parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.00 and whose
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