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At a soft drink dispenser, a restaurant patron put 0.2 kg of crushed water ice, at a temperature of ?5 C, into an insulating cup. [In fact, the ice was slightly colder before it left the machine, but its warming to ?5 C cooled the inside surface of the cup.] Then, he quickly added 0.4 kg of "pop" at a temperature of 27 C [This warm temperature arises because the refrigeration unit for the ice reservoir emits heat into its surroundings.] The speci?c heat capacity of water ice is 2100 J/(kg·C). The pop is comprised almost entirely of liquid water, and so we take its speci?c heat capacity to be [approximately] 4200 J/(kg·C). The latent heat of fusion for water is 333 kJ/kg. (a) Assuming that no heat is exchanged with the environment, determine (i) the heat required to warm the ice to 0 C, and (ii) the temperature of the pop in the cup once the ice is at 0 C. (b) Compute the amount of heat that must be absorbed by the ice to melt all of it. (c) Compute the amount of heat that would be emitted by the pop, were it to cool to 0 C. (d) Comment on your results for (b) and (c). (e) Do the problem again, this time with 0.02 kg of ice in the cup initially.
Two particles are fixed to an x axis: particle 1 of charge q1 = +2.1 10-8 C at x = 20 cm and particle 2 of charge q2 = -4.00q1 at x = 70 cm. At what coordinate on the axis is the net electric field produced by particles equal to zero.
What is the greatest angle of elevation
A motorist drives south at 30.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.80 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.8 min trip, how do you find the total vector, average speed and average velo..
Find out the magnitude of angular acceleration of the wheel
A person with perfect pitch sits on a bus bench listening to the 450 Hz horn of an approaching car. If the person detects the frequency of 470 Hz, how fast is the car moving.
A star ship is circling a distant planet of radius. The astronauts determine that the acceleration because of gravity at their altitude is half the value at the planet's surface. How far above the surface are they orbiting? Your reply would be a m..
Compute magnitude and direction of magnetic field produced by the moving belt at a point just above its surface .
A car is traveling 72.0 km/h when the driver applies the brakes. If if car slows down uniformly with an acceleration of -4.5 m/s2, how far does the car travel before coming to rest.
A projectile is fired at such an angle from the horizontal that vertical component of its velocity is 49 m/s. The horizontal component of its velocity is 61 m/s.
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
The bullet becomes embedded in the block. If the bullet block system compresses the spring by a highest of 84- cm, what was the speed of the bullet at impact with the block.
What is inductance of the solenoid
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