Aheat engine does 300 j of work during one cycle. in this cycle 900 j of energy is wasted.
what is the efficiency of the engine?
a. 0.25
b. 0.33
c. 0.50
d. 0.75

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Which of the following examples illustrates static friction? a box sits stationary on a ramp. a ball rolling on the lawn eventually comes to rest. a car rounds a curve on a road. a fish swims upstream.