Which of the following examples shows a conversion, or change, from chemical energy directly to light? A a light bulb
B a nuclear power plant
C burning candle
D the sun

What is the mass of 8 moles of sodium atoms

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

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?