Which of the following describes the work done by a heat engine?

A. Heat input minus heat output

B. Heat input minus work

C. Heat input plus heat output

D. Heat output minus heat input

Which of the following are true for acceleration? A. The symbol used for acceleration is. B. Acceleration is a scalar quantity. C. The SI unit for acceleration is minutes per second. D. Acceleration describes how the velocity changes in time.

If we decrease our the time it takes for a car to travel over the same distance this will A. Increase speed B. Have no effect on velocity or speed C. Decrease the speed D. Decrease the velocity

Describe the main distinguishing features of spiral, elliptical, and irregular galaxies.

Will water pressure be greater 1 meter below a lake or 1 meter below the ocean?

a) The earth travels with an approximate speed of 29.9 km/s (66 900 mi/h) in its journey around the sun. The mass of the earth is 5.98 X 10^24 kg. Find the magnitude of its linear momentum.

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?