A heat 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

Of the following machines, which is not related to the others? ramp screw lever

Technician A says that low pressure smoke installed in the fuel system can be used to check for leaks. Technicians B says that nitrogen under low pressure can be installed in the fuel system to check for leaks. Which technician is correct? A.

Who is Issac Newton's? What is gravitation?

At t = 0 the components of a radio-controlled car's velocity are vx = 0.5 m/s and vy = 1.2 m/s. Find the components of the car's velocity at t = 4.

The ice cube melting is an example of a and the water evaporating is an example of a

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff

A 15.0 m long plane is inclined at 30.0 degrees. If the coefficient of friction is 0.426, what force is required to move a 40.0 kg mass from rest at the bottom on the plane to the top of the plane with a final velocity of 8.00 m/s?

In a pig-calling contest, a caller produces a sound with an intensity level of 60 db. how many such callers would be required to reach the pain level of 120 db? 2 incorrect: your answer is incorrect.

Why is the use of scientific names important in biology?

1) what is a calorie?