The specific heat of water is 1.00 cal/gC

The specific heat of ice is 0.500 cal/gC

The specific heat of steam is 0.480 cal/gC

The latent heat of fusion is 80.0 cal/g

The latent heat of vaporization is 540.0 cal/g

Given the above information, determine how much heat (in calories) is absorbed by a 125 gram sample of ice at a temperature of - 20 degrees Celsius when it warms to 125 grams of steam at 125 degree Celsius?

Answers are rounded to two digits to the right of the decimal.

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.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.