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1. The air temperature above coastal areas is profoundly influenced by the large specific heat capacity of water. How large of a volume of air can be cooled by 1.0 C if energy is transferred as heat from the air to the water, thus increasing the temperature of 1.0 kg of water by 1.0 C? The specific heat capacity of air is approximately 1000.0 J/kg *C, and the density of air is approximately 1.29 kg/m^3.
2. Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.0 kg of gaseous nitrogen at 77 K for it to completely liquefy?
3. How much energy is needed to melt exactly 1000 aluminum cans, each with a mass of 14.0 g, for recycling? Assume an initial temperature of 26.4 C.
a small block of ice is at 0 degrees celcius is subjected to 10g of 100 degrees celcius steam and melts completley.
One side of a plane wall is maintained at 100 ºC, while the other side is exposed to a convection environment having T = 10 ºC and h = 10 W/m2 -ºC. The wall has k = 1.6 W/m-ºC and is 40 cm thick. Calculate the heat-transfer rate through the wall
Knowing that the descent parachute failed to deploy so that the rocket fell freely to the ground after reaching its maximum altitude and assuming that g = 9.81m/s2, determine
Within a typical thunder cloud there are electric charges of -40 C and +40 C separated by a vertical distance of 5 km. Treating these charges as point like, find the magnitude of the electric force of attraction between them.
Figure (a) shows a sphere of radius r = 21 cm and density of ρ = 3.1 g/cm3 suspended in water. What is tension in the string
In some experiments, short distances are measured by using capacitance. Consider forming an LC circuit using a parallel plate capacitor with plate area A, and a known inductance L.
question an achromatic lens is made of two very thin lenses with focal lengths f1 -28.7 cm and f2 20.4 cm that are
A liquid is used to make a mercury-type barometer, as described in section Pressure in a Fluid. The barometer is intended for spacefaring astronauts. Find the atmospheric pressure at the surface of Planet X
A block of wood weighing 2N slides down a 37^0 inclined plane starting from rest and reaching 2 m/s. What is the kinetic coefficient of friction between the block and slide
The polarizing direction of the first sheet is parallel to the x axis, that of the second sheet is at an angle of 30 degree counter-clockwise from the y axis, and that of the initial third sheet is at an angle of 60 degree counter-clockwise from t..
A proud deep-sea fishermen hangs an 61 kilogram fish from an ideal spring having negligible mass. The fish stretches the spring 0.130 meter. Estimate the maximum speed it will reach
A cork shoots out of a champagne bottle at an angle of 35.0 degree above the horizontal. what was its initial speed
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