A hot water pipe with an external diameter of 5 cm and a length of 10 m, is losing heat to
the surrounding air at 18 °C by natural convection, with a heat transfer coefficient of
25 W/m2.K. If the surface of the pipe is at 80 °C, determine the rate of heat loss from the
pipe by natural convection.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

The amount of work done is determined by 2 factors. describe an example of work (using the scientific definition) list the 2 factors that determine the amount of work done.