What type of waves is caused by a gravitational attraction of the sun and moon?

What are four elements that are involved in the cycling of energy and matter on earth

In 2013, renewable energy provided 10% of the total energy used in the united states, and wind energy accounted for 17.4% of the renewable energy used. what percent of the total energy used in the united states in 2011was wind energy?

what is the varity of species is an ecosystem

A rolling ball moves from x1=8.4cm to x2=-4.2cm during the time from t1=3.0s to t2=6.1s. what is its average velocity over this time interval?

A heat engine operating between energy reservoirs at 20? c and 600? c has 30% of the maximum possible efficiency.

A microfarad capacitor is charged via a 12v battery. there is 1 kohms resistor in series with the capacitor. how much current is flowing in the circuit after 1 second?

A wave that moves its medium parallel to its direction of travel is a

Why do i have no life, how do i get one?

Why is a ehephent so big is it just big or are we so small?

Which of the following traits might be considered an adaptation fora rabbit living in the Arctic?