A hair is 15 cm long. How old is this hair?

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume