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A coffee-maker contains a heating element that has a resistance of 44 Ω. This heating element is energized by a 120-V outlet. What is the current in the heating element?
A 99 kg rock with a volume of15 L is completely submerged in water.The density of water is 1 kg/L. What volume of water is displaced by the rock?
if the boy is traveling at 1m/s relative to the ground, explain how fast does the boy appear to be moving relative to the woman?
A layer of oil with density 800 kg/m^3 floats on top of a volume of water with density 1,000 kg/m^3. What is the density of the block
A storage tank has a diameter of 80 ft, a height of 25 feet, andcontains oil to a height of 15 ft. The suction pumps, whichcan handle 15, 000 bbl/d are started, but the safety valves areclogged and a vacuum is drawn in the tank.
Water (density 1000 kg/m^3) is flowing in a pipeline. At point 1 the water velocity is 5.0 m/s. Point 2 is 3.5 m above point 1. The cross sectional area of the pipe is .060 m^2 at point 1 and .020 m^2 at point 2. What is the Pressure difference P1-P2..
If the efficiency of a reversible engine is 28.%, what is its COP operated as a refrigerator
A student ate a Thanksgiving dinner that totaled 3000Cal . He wants to use up all that energy by lifting a 30-kg mass a distance of 1.0 m. How many times must he lift the mass
A thin spherical shell made of plastic carries a uniformly distributed negative charge -7e-10 coulombs (indicated as -Q1 in the diagram). Two large thin disks made of glass carry uniformly distributed positive and negative charges 1.7e-05 coulombs an..
q1. gamma-ray busters are objects in the universe that emit pulses of gamma rays with high energies. the frequency of
using your knowledge of statics discuss briefly why the magnitude and direction of the knee reaction force varies with
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20kg
Each of two small non-conducting spheres is charged positively, the combined charge being 40 µC. Determine the magnitude of the smaller of the two charges
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