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Which of the following involves an endothermic reaction? a. lighting a laboratory burner b. pens converting sunlight into chemical energy c. burning propane d. using a chemical hand warmer
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Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.
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Why does gravity have a lesser than grater effect on higher altitudes?
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Acar going 30 m/s to 70 m/s in 10 seconds calculate the acceleration of the car
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Which of the following involves an endothermic reaction? a. lighting a laboratory burner b. pens co...
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