What is the relationship between the PE and the height of the skater on the track? Use words like high, medium, low. A. When the skater is at the beginning of the track, the potential energy is . B. When the skater is at the middle of the track, the potential energy is . C. When the skater is at the end of the track, the potential energy is .

What causes the shielding effect to remain constant across a period?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.