Thermal engineers use heat transfer to run different machines. How does knowing the different temperatures of different states of a material (water, hydrogen) help when
figuring out the best way to release the potential energy stored in the material?

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Aforce of 9.00 newtons acts at an angle of 19.0 to the horizontal. what is its component in the horizontal direction?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c