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A certain amount of oxygen gas occupies a volume of 12 liters when its temperature is 20 oC and its pressure is 1 atm. Calculate the number of grams of oxygen:a) 6.4b) 10.7c) 16d) 32e) 64
A grandfather clock is powered by the descent of a 4.40-kg weight. If the weight descends through a distance of 0.750 m in 3.00 days, how much power does it deliver to the clock
Two canoes are tied together and traveling down a river with the current. Spotting a waterfall, the two canoeists cut the rope, What is the combined mass of this canoe and rider
A .18 F capacitor is fully charged and has a potential difference( ?V), across its terminals of 9.0 volts. It is connected in series to a 200? resistor, find the energy stored in the capacitor when its fully charged
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
A man pushes a lawn mower on a level lawn with a force of 200N. If 40% of this force is directed downward, then how much work is done by the man
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 6 excited state. What are the photon wavelengths of transitions
A tube of mercury with resistivity 9.84*10^-7 *m has a 23 N/C electric field inside the column of mercury. How much current is flowing, if the diameter of the tube is
Halley's comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being 0.59 A.U. what is its speed when it is farthest from the Sun
A 41 kg ice skater is moving at 4.73 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. Find the force exerted by the rope on her arms
A 4.00 kg hoop starts from rest as shown in the diagram below. If the radius of the hoop is 0.500 m, the height, h, is four times the radius of the hoop, and l is equal to the radius of the hoop, what is the linear speed (in meters/second) of t..
The current in a 100 watt lightbulb is 0.770 A. The filament inside the bulb is0.190 mm in diameter, What is the current density in the filament
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
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