Which of the following requires more energy then they produce? Exothermic
Endothermic
(the subject is science but it wasn’t an option)

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?