A1.88-m (6 ft 2 in.) man has a mass of 81 kg, a body surface area of 1.8 m2, and a skin temperature of 35.2 ∘c. normally, 80% of the food calories he consumes go to heat; the rest goes to mechanical energy. his emissivity e is 1 because his body radiates almost entirely nonvisible infrared energy, which is not affected by skin pigment. (careful! his body at 35.2 ∘c radiates into the environment at 20.0 ∘c, but the environment also radiates back into his body. the net rate of radiation is pnet=pbody−penvironment.) to keep his body’s temperature constant, how many food calories should he eat per day if he is in a room at 20.0 ∘c and he loses heat only through radiation?

dang that balls went far

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.