Noah is loading the ark and the last animal on board is a stubborn 1500 kg elephant that refuses to budge. Noah and his family pull the elephant at a constant speed up the 10o incline with a force of 8000 N. determine the coefficient of friction between the elephant and the ramp.

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.

Explain what happens at the saturation point when adding salt to water at room temperature.

Why do atoms emit energy of only specific wavelengths