The diagram shows a roller-coaster track. Assume that the system is closed. B D C E A At which point on the track will a roller-coaster car have the greatest potential energy due to gravity? O A A B. D O C. B O D. C

The pressure in a fluid is affected by which characteristics of that fluid

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy