While running, you need to transfer 290 J/s of thermal energy from your body to the moisture on your skin in order to remain at the same temperature. What mass of perspiration must you evaporate each second?

= 1.33 × 10⁻⁴kg

Explanation:

Lets apply the formula for the evaporative enery transfer rate

H(evaporative) = -(Δm/Δt) . l₀

    = -320 J/s

   = -320W

Δm = (320Δt) /  l₀

Δt = 1

Δm = (320 * 1) / 2.4 × 10⁶

Δm =  1.33 × 10⁻⁴kg

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

28. evolution

29. environment, survive, offspring  

explanation: