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How many joules of energy are required to run a 100 W light bulb for one day? Burning coal yields about 30 . 106 J of energy per kg of coal burned. Assuming that the coal power plant is 30% efficient, how much coal has to be burned to light that light bulb for one day?
Look for the pros and cons of 360 degree performance reviews.Write at a four-paragraph short essay in which you address the following questions in order.
Find the min and max frequencey you hear as you fall. Find the half-max frequency that you hear, at what depth are you at?
A 60.0 kilogram lady stands at one end of a 120 kilogram raft that is 6.0 meter long. determine the distance between the raft and the pier
A conductor is slowly bought near the cap of a positively charged electroscope. The leaf first collapses and then diverges. State the charge on the conductor.
A small block of mass m1 = 0.5kg slides to the left, with a velocity of v1 = -8.40 m/s, towards a curved wedge of mass m2 = 3 kg which sits on an icy, frictionless lake surface.
Two balls with a net charge of - 4.0 ?C and + 10.0 ?C are separated by 2 cm. What is the electrostatic force on the positive charge
Three identical blocks, A, B, and C, are on a horizontal frictionless table. Find the tension in the string between blocks
A thin rod (length = 1.26 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. What is the magnitude of the angular acceleration of the rod
A child slides down a slide with a 21^\circ incline, and at the bottom her speed is preciselyhalf what it would have been if the slide had beenfrictionless. Calculate the coefficient of kinetic friction between the slide and the child.
A thin spherical shell of radius 20.0 cm has 5.0 µC of charge uniformly distributed over its surface. What is the electric field 10.0 cm from the center of the sphere
Determine the maximum temperature of the glasses that just causes moisture droplets (i.e., "fog") to form when cleaned in this manner.
Graph the power of the laser when it's on. b) Compute the energy in the pulse. c) Compute the number of photons in the pulse.
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