The half-life of carbon-14 is 5,730 years. after 11,460 year, how much of original carbon-14 remains?

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. use the following specific heat capacity data to determine which block will increase its temperature the most.

What will happen in a hybrid vehicle if current flow becomes too high due to a short?