Carbon 14 has a half-life of 5,730 years. The sample weighs 210 grams. a. After four half-lives, how many grams of carbon-14 remain?

b. After four half-lives, how many years have elapsed?

(Please answer questions a and b.)

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

c. is the answer

by love gaming

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them