A rocket energy takes in 800J of chemical energy and changes this into 480J of kinectic energy and 320J of heat energy? What is the useful energy? HELP please...its for my assignment due tomorrow

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The softest and hardest minerals are: softest hardest