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On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, and the outside temperature is -18° C. What is the increase in the entropy of the universe that this heat loss produces?
What least amount heat is needed to bring 20-g of water at 20C to the boiling point and completely boil it away.
The string will break if its tension exceeds 50-{rm N}. The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find out the maximum speed the stone can attain without breaking the string.
what is the magnitude of the force between the two charges. The scale of vertical axis is set by vs = 5.10 m/s. What is the coefficient of kinetic friction between block and floor.
The Sun is a low mass star and so would never have the core fusion reactions of massive stars. Yet, the Sun has iron in its atmosphere, as well as gold, silver and other elements much heavier than iron and why?
A long, narrow rectangular loop of wire is moving toward the bottom of page with a speed of 0.025 m/s. The loop is leaving a region in which a 2.1 T magnetic field exists; magnetic field outside this region is zero. All through the time of 1.0 s, wha..
What is the effective spring constant (that is, the ratio of force to change in length) of a copper cable that is 7.0 in diameter and 13 long?
A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0 o angle.
Compute the position, velocity vector and the distance attained by athlete in a long jump event.
290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
During a crash test, a car moving at 60 km/ hr collides with a rigid barrier and comes to a complete stop in 200 ms.
A copper vat is 10-m long at room temperature (20°C). How much longer is it as it contains boiling water at 1 atm pressure.
What is least value for which stick remain in equilibrium
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