Evaporation of sweat is an important mechanism for temperature control in some warm-blooded animals. a) what mass of water must evaporate from the skin of a 70 kg man to cool his body 1.00 degree Celsius? The heat of evaporation of water at body temperature 37 degrees Celsius is 2.42x 10^6 J/kg. K. the specific heat of a typical human body is 3480J/kg. K b) what volume of water must the man drink to replenish the evaporated water? Compare to the volume of a soft drink can (355 cm^3).

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

it's a b and

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm