Using the formula Q = mcΔT, calculate how many joules of heat are added to 1500 g of water to raise the temperature from 15 °C to 80 °C. (The specific heat of water is 4.18 J/g°C.) Show your work.

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.

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?