One pace of a sheet of cork 3mm thick is place in contact with one pace of a sheet of glass. find my thick, both sheet been 20cm²,sheet of glass 5mm thick. the outer paces of this square composite are maintain at 100degreecelcius and 20degreecelcius. (1)find the temperature of the glass. (2) the rate of heat transfer through glass $cork.
3)the temperature gradient of the two sheet.

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.

The slope of a velocity time graph over any interval of time gives the during that interval

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v