Many species cool themselves by sweating, because as the sweat evaporates, heat is transferred to the surroundings. a human exercising strenuously has an evaporative heat loss rate of about 650 w. if a person exercises strenuously for 29.1 min, how much water must he drink to replenish his fluid loss? the heat of vaporization of water is 2430 j/g at normal skin temperature.

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?