A particular engine takes in 10000 j of heat, does 2000 j of work, and as it runs discharges heat. its own energy is the same when it has finished as when it started. how much heat did it discharge if this is a closed system

Which is not part of John Dalton's atomic theory? a. All elements are composed of atoms. b. Atoms of different elements have different masses. c. All atoms of the same element have the same mass. d. Atoms are made up of smaller particles.

A farm tractor tows a 3300-kg trailer up a 14" incline with a steady speed of 2.8 m/s. what force does the tractor exert on the trailer (ignore friction.)

Which example represents the impact of religion on culture in the United States? A. children receiving counseling at school B. farmers celebrating a rich harvest C. teachers raising an informed citizenry D. banks and offices closing on Sunday

Which diagram represents an object at static equilibrium?

True or False: Unlike a fixed pulley, a moveable pulley multiplies the input force

When a light shines through an object it is called

A man goes from his house to office with a speed of 57km/hr and returns to the house with a speed of 83km/hr in his car. Calculate the average speed of the car.

Identify several factors in the environment that can affect physical fitness levels.

Do Brain cells act and look like skin cells? Why or why not?

A taxi hurries for 1 3/4 hours with a constant speed of 84 mph and then for another 1 hour 45 minutes with a constant speed of 24 mph. what is its average speed for the total trip?