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An ball rolls off a cliff 21.0 m above the ground with an initial horizontal speed of 5.0 m/s. Acceleration due to gravity is 9.8 m/s2.
a) How long after leaving the top of the cliff does the ball hit the ground?
b) How far from the base of the cliff does the ball land?
A skater spins at 3 rev/s when she stretches her arms outward. Find her body inertia when she stretches her arms outward
A 22.5-mW laser beam of diameter 1.98 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
A series ac circuit contains a 150 resistor, a 19.0 inductor, a 4.50 capacitor, Find the average power delivered to the entire circuit
You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. What is the linear mass density of the string
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
A uniform charge density of 680 nC/m3 is distributed throughout a spherical volume of radius 6.00 cm. What is the electric flux through this cubical surface if its edge length is 3.30 cm
A hollow cylindrical conductor has an inner radius a= 1 cm and an outer radius b= 2.6 cm. The total current during the cylinder is 15 A. Using Ampere's Law, Compute the magnetic field at
Two identical point charges are fixed to diagonally opposite corners of a square that is 0.455 m on a side. Each charge is +2.70 10-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?
in other cases there is a clear break between the rainbow orders. the spacing of ruled lines on a diffraction grating
A 1-kg block on the Moon has a weight of 1.62 N. Given that the Moon's radius is 1740 km, calculate the Moon's mass
A tennis player swings her 1000 g racket with a speed of 8.00m/s . She hits a 60 g tennis ball that was approaching her at a speed of 13.0m/s, How fast is her racket moving immediately after the impact
A certain fluid has a density of 1040 kg/m3 and is observed to rise to a height of 2.4 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
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