31.   Computer chips expend a small amount of electrical energy in each calculation, which generates heat.

32.   Diamonds gaining speed as they fell would produce friction as they rubbed against other molecules, generating more heat in the process.

33.   Documenta is seldom declared a smashing success, but it usually generates critical heat.

34.   During power outages, I like trying to generate a little heat by making a fire in the fireplace.

35.   Embedded in the tire, the investigators said, were parts from at least one oxygen generator, a device that can generate tremendous heat.

36.   Even just thinking requires energy and generates heat, which is why computers have fans.

37.   Finally, human activity in cities generates extra heat that creates an island of urban heat at night.

38.   FDA officials say that ultrasound can generate heat in fetal tissue, create microscopic bubbles and cause vibrations, all of which might affect fetal development.

39.   He pointed out that RF radiation is non-ionizing, meaning that it generates heat but does not damage the genetic material DNA, as nuclear fallout would.

40.   Heat is a major problem in the design of complex chips, which can generate more heat per unit area than a halogen lamp.