A ball has 10 Joules of kinetic energy as it reaches the bottom of the hill. Approximately how much potential energy did the ball have at the top of the hill?

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

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.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine