The following data were obtained in an experiment using an immersion heater to determine the specific latent heat of vaporization of water. Mass of can and water at start of boiling= 0.28kg
Mass of can and water at end of boiling=0.26 kg

Power of heater= 150 W
Time of heating= 5 minutes

Using the data above, calculate the specific latent heat of vaporization of water, assuming negligible heat is lost to the surroundings.

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

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