Which data set has the smallest standard deviation? A. 55, 90, 34, 78, 15, 20, 19
B. 1000, 1001, 1002, 1000, 1001, 1001
C. 1, 9, 120, 9, 1, 1, 9
D. 7, 8, 89, 1005, 23400, 5, 3

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Which word expression describes how much to calculate pressure