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Silver pellets with a mass of 0.90g and a temperature of 84C are added to 210g of water at 14C.
A) How many pellets must be added to increase the equilibrium temperature of the system to 26C? Assume no heat is exchanged with the surroundings.
a 4kg watermelon is balanced on bruces shaved. r. lee ermey who hates watermelons with every fiber of his being shoots
An arrow, starting from rest, leaves the bow with a speed of25 m/s. with what speed wouldthe arrow leave the bow
the starting current in a dc motor is 20 a but it normally operates on 110 volts with a back emf of 90 volts. what is
The largest barometer ever built was an oil-filled barometer constructed in Leicester England in 1991. Determine the density of the oil used in the barometer
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 small container of water is placed on a carousel inside a microwave oven, at a radius of 11.5 cm from the center. What angle does the water surface make with the horizontal
A satellite of mass 50.0kg is orbiting the earth at aheight of 1000km (as measured above the surface of the earth). The mass of the earth is 5.98x1024kg and the earth's radiusis 6.38x106m.
violet light and red light travel through air and strike a block of plastic at the same angle of incidence. the angle
Rock thrown vertically upwards at the edge of a cliff, with an initial velocity of 5m/s, the cliff is 79m high. How far does the rock travel
a ball is kicked from a point 38.9 m away from the goal. the crossbar is 3.05 m high. if the ball leaves the ground
two spaceships approach earth with equal speeds as measured by an observer on earth but from opposite directions. a
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
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