Why might a scientist repeat an experiment if she/he didn't make a mistake in the first one? experiments are repeated to a) make sure she/he gets identical results. b) see if any portion can be skipped or ignored. c) prove that your results were incorrect the first time. eliminate d) check to see if the procedure was correct and nothing was left out.

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.

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Name two kinds of practical electric pumps.