Asample contains 10 g of a radioactive isotope. how much radioactive isotope will remain in the sample after 1 half-life? a.5.0 b. 2.5 c. 7.5 d.10

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.