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The height of the upper falls at Yellowstone Falls is 32.2m. When the water reaches the bottom of the falls, its speed is 25.8m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?
A heat transfer of 9.1 ? 105 J is required to convert a block of ice at -13°C to water at 13°C. What was the mass of the block of ice
The four masses shown in the figure are connected by massless, rigid rods, Find the coordinates of the center of gravity
The membrane that surrounds a certain type of living cell has a surface area of 6.1 x 10-9 m2 and a thickness of 1.3 x 10-8 m. how many such ions are present on the outer surface?
Positive electric charge is distributed in the shape of an infinitely long insulating cylinder of radius R and volumetric charge density ?=?0(1-r/R), Find an expression for the linear charge density
A sound source approximated as a point radiates sound equally in all directions. What is the total power of the source
A light wave has a 670 {\rm nm} wavelength in air. Its wavelength in a transparent solid is 420 {\rm nm}. What is the speed oflight in this solid, in m/s? What is the light's frequency in the solid, in Hz?
Some European trucks run on energy stored in a rotatingflywheel, with an electric motor getting the flywheel up to its topspeed of 200rad/s. What is the kinetic energy of the flywheel after charging
The position of an object as a function of time is (3.2t + 1.8t^2)i + (1.7t + 2.4t^2), Find the magnitude and direction of the object
q1. an aluminium cup of 180 cm3 capacities is totally filled with glycerin at 18deg c. how much glycerin in cubic cm
0.14 kg of water at 88.0 deg C is poured into an insulated cup containing 0.234 kg of ice initally at 0 deg. Calculate the mass of liquid
part a calculate the magnitude of the force required to give a 0.145-kg baseball an acceleration a1.00ms2 in the
A train traveling at v0 = 25.0 m/s begins to brake by applying a velocity-dependent instantaneous acceleration a(v) = ? /(v u) m/s2, Determine the distance traveled by the train until it comes to a complete stop
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