a person tries to move a heavy stone of mass 100 kg for an hour but fails (a).How much work has to be done on the stone?(b).if instead ,he ,lifts lifts it up to a height of 2m , how much work is done

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.

Asample of a gaseous substance changes into liquid. this process is called (blank) and it takes place when heat is (blank) a gaseous system

What type of nuclear decay causes the atomic number of an element to increase by 1?