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1. What is better to warm up in a cold night a kg of hot water at 500C or a kg of gold at the same temperature? Why?
2. What is happening with the parameters (pressure, volume, and temperature) of an air bubble released by a frog at the bottom of a lake? Explain why.
Please provide in depth answer
If 250 moles of gas are compressed to 0.75 of an original volume at a constant temperature or 295 K, how much heat must have gone into the environment?
An initially motionless car of mass 1000kg slides down from a height on a frictionless roller coaster track. What was the minimum height from which it was released
It is common to see birds of prey rising upward on thermals.The paths they take may be spiral-like. calculate the speed of the bird relative to the ground
an 8000 kg truck traveling with a velocity of 20.0m/s in a direction 30 (degree) south of east, find the direction of the combined mass
What is the annual petroleum consumption of the United States, and where does this petroleum originate? Include all sources supplying a significant fraction of the US consumption (5% or more).
Find out the frequency of the fourth harmonic if the string is fixed at one end and free at other. (That is, if the free end is attached to a long string of negligible mass.)
Object O1 is 14.7 cm to the left of a converging lens with a 10.8-cm focal length. What is the overall magnification of this system
Two point charges 2.0cm apart have an electric potential energy -310uJ. The total charge is 15nC. What is the lesser charge
a horizontal rifle is fired at a bulls -eye. the muzzle speed of the bullet is 670ms the gun is pointed directly at the
A whale swims due east for a distance of 1.5 km, turns around and goes due west for 5.7 km, and finally turns around again and heads 4.5 km due east. What is the total distance traveled by the whale
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
Two connected blocks are pulled across a horizontal, frictionlesssuface, as shone in the figure. If the acceleration of both massessis 4 m/s^2, find the tensions in both strings. Let= 2 kg and= 3 kg.
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