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A 1530 kg car is traveling with a speed of 14.5 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 49.5 m?
The length of a string is 456 cm. It is held ?xed at each end. The string vibrates in three sections; i.e., the string has three antinodes and string vibrates at 180 Hz.
A roller coaster car travels down a hill and is moving at 18 m/s as it passes through a section of straight, horizontal track. what is the speed of the car at the top
A movable piston having a mass of 7kg and a cross-sectional area of 6 cm2 traps 0.2 mol of an ideal gas in a vertical cylinder. The piston slides without friction in the cylinder. The outside of the cylinder is kept at atmospheric pressure, 1.013×..
A parallel-plate air capacitor is made from two plates 0.070 square, spaced 9.3 apart. What must the potential difference between plates be to produce an energy density of.
2-information centers used for retail credit authorization are located in 2-different major population centers, which are separated from each other through a large zone of very little population.
Staring from rest, a hoop rolls without slipping down a long ramp. What is its translational speed when it's 5.0 m below its initial height, determine the hoop's translational speed
A proton with a velocity in the positive x-direction enters a region where there is a uniform magnetic field B in the positive y-direction, The electric field should be in the...which direction
a monochromatic beam of light of wavelength 600nm is incident on a diffraction grating with a slit spacing of 1.7*10^-4cm
A mercury barometer reads 735.0 mm on the roof of a building and 764.5 mm on the ground. determine the height of the building
A 155 g copper bowl contains 245 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5 g being converted to steam. The final temperature of the system is 100°C. Neglect energy trans..
A new electric power plant has an efficiency of 42%. how many are essentially lost as waste heat (in barrels of oil) to the environment
An aeroplane has wings with a surface area of 34 m2. The shape of the wings are such that air moving over the top of them travels 20% faster than the velocity of the air under the wing, what is the take-off speed of the plane
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