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Question
A car weighs 1,725 kg and is speeding on I-75 at 90 miles per hour. The brake rotors are made of 20 kg of iron and steel composite. The car comes to the crest of a hill and traffic is stopped ahead. The driver slams on the brakes and stops the car just in time. What is the temperature change in the rotors?a. 180 oC
b. 151.7 oC
c. 251.7 oF
d. 300 K
Answer
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