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What mass of steam at 100 degrees Celcius must be mixed with 165g of ice at its melting point, in a thermally insulated container, to produce liquid water at 60 degrees celcius?
Suppose an old flashlight battery shows a voltage of 1.45 V when the probes of a voltmeter are placed across it. What is the current when the resistor is hooked up
the escape speed starting from the surface of the earth is 11.2 km/s(neglecting any effects of the earth's orbital motion, what would be the escape speed from that planet
An ice cube of mass ma and specific heat Ci is initially at temperature T1, where T1 is less than 273K. If L is the latent heat of fusion of water, and the specific heat of water is Cw, how much energy is needed to convert the ice cube to water at ..
Pick what you think are the most reasonable choices for each parameter in the Drake equation and justify your choice. estimate the likely nearest distance to such a civilization
A rock is dropped off a 200m cliff. What is the velocity of the rock at a height of 30m?( we are currently studying the conservation of energy)
A ball with radius r1 and mass m1 is attached by a rod of length L to a second ball with radius r2 and mass m2. Where is the system's center of gravity
Runner A is initially 1.0 mi west of a flagpole and is running with a constant velocity of 8.0 mi/h due east. How far are the runners from the flagpole when they meet
A small steel wire of diameter 1.0mm is connected to an oscillator and is under a tension of 5.7N. What is the power output of the oscillator, assuming that the wave is not reflected back
jamie is playing tennis. a 0.057kg ball is coming towards her at a velocity of -14 ms. after she hits it in the exact
A positive charge of 3.2×10-9 C is brought in from infinity to a point (2m,0), How much work did the electric field do
Twenty particles, each of mass m0 and confined to a volume V, have various speeds: two have speed v, three have speed 2v, five have speed 3v, determine the pressure they exert on the walls of the vessel
A bird flies 3.0 km due west and then 2.0 km due north. Another bird flies 2.0 km due west and 2.0 km due north. What is the angle between the net displacement vectors of the two birds
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