A forensic investigator notes that an 8g lead bullet melted completely upon impact with a doorframe. Assuming the bullet was fired at room temperature (~20 C), what would be the minimum muzzle velocity of the gun (in other words, how fast was the bullet traveling)?

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?

Which component of the earth’s atmosphere is decreased due to photosynthesis?