Amachine is supplied energy at a rate of 4,000 w and does useful work at a rate of 3,760 w. what is the efficiency of the machine? a. 97 percent b. 96 percent c. 94 percent d. 92 percent

your answer is  C. 94 percent

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dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb