The average wavelength in a series of ocean waves is 15.0 m. a wave crest arrives at the shore on average ever 20 seconds, so the frequncy is 0.050 hz. what is the average speed of the wave?

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.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?