In an internal combustion engine (either gasoline or diesel), the upstroke of the piston reduces the volume of the cylinder. using the kinetic theory of matter, what happens to the temperature and pressure of the air/fuel blend in the cylinder?
a. the volume is forced smaller, the temperature goes up and the pressure goes
up
b. the volume is forced smaller, the temperature goes up and the pressure goes
down
c. the volume is forced smaller, the temperature goes down and the pressure
goes up
d. the volume is forced smaller, the temperature goes down and the pressure
goes down
Answers: 1
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You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.
Answers: 2
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