Question 1 : A petrol engine has a work output of 96kJ per minute. What is the power I put if the engine efficiency is 20%? Question 2 : A crane lifts a load of 500kg to a height of 120m in 16s. If the power input is 45 000W, what is the efficiency of the motor used in the crane?
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Physics, 22.06.2019 13:10
Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above
Answers: 3
Physics, 22.06.2019 18:10
Aa a of 22 m/s at an of 36.9 .be . a. b. c. (3)x y of? (3)go? (4) () it to to ?
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Physics, 23.06.2019 04:31
The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)
Answers: 2
Physics, 23.06.2019 12:30
Write a brief essay describing the minimum requirements for any electric circuit. within your essay,
Answers: 1
Question 1 : A petrol engine has a work output of 96kJ per minute. What is the power I put if the en...
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