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Circular Motion: A string under tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.5 m at a speed of 20.4 m/s on a frictionless table. The string passes through a small hole in the table at the center of this circle. As the string is pulled in, the speed of the rock increases. When the string is 1.00 m long and the speed is 51.0 m/s, the string breaks. What is the breaking strength, in Newtons, of the string?
A plastic block of dimensions 2.5 cm x 3.8 cm x 4.0 cm has a mass of 28.0 g. What is the density of the block? If placed into a cup of water, will the block float or sink
An ideal gas is compressed from a volume of 400 cm^3 to a volume of 150 cm^3 slowly and isothermally in a piston-cylinder system. If the final pressure is 100 kPa, determine a) the work done on the gas and b) the heat transfer (specify whether the..
You are asked to construct a capacitor having a capacitance near 1 nF and a breakdown potential in excess of 10,000 V, What is the breakdown potential of this capacitor
The speed of light in polythene is 1.99 x 108 m/s. What is the index of refraction of polythene
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 28.9N. What is the sample's specific heat
The block starts at the top of the wedge at 1.2 m. Find out the final speeds of a block and the wedge once the blook has slid to the bottom.
a ball is thrown horizontally from a 20-m-high building with a speed of 5.0 m/s , Make a sketch of the balls trajectory
For two concentric conducting rings the inner of the large ring in 12 cm and the outer radius of the smaller ring is 4 cm, Calculate the electric potential half way between the two rings 8 cm away from the center of the rings
A 196-g aluminum calorimeter contains 612 g of water at 21° C. A 96-g piece of ice cooled to -21° C is placed in the calorimeter, Find the final temperature of the system, assuming no heat is transferred to or from the system
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 37.5 m/s and initial angle of 38.4° with respect to the horizontal.
compute the mean scattering cross-section at a frequency of 5 MHz of a distribution of air bubbles of 3 μm mean radius, assuming a Gaussian size distribution of a variance of 1 μm and 1.5 μm. The total damping constant is 1.0.
In a double-slit experiment, slits separated by 1.240e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
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