An automobile engine has an efficiency of 19.0%. If it produces 23.0 kJ of mechanical work per second, the heat rejected per second from the engine is closest to: (a) 77.0 kJ (b) 81.5 kJ (c) 86.5 kJ (d) 92.0 kJ (e) 98.1 kJ

How does the direction of the lift on a plane compare with its weight as it flies at a constant speed and altitude? A. Lift acts downward, and weight acts upward. B. Both lift and weight act downward. C. Both lift and weight act upward. D.

What is the mass of 5 moles of gold

Q2. Quantities in physics are either scalars or vectors. (a) Use the correct answers from the box to complete the sentence. acceleration direction distance speed time Velocity is _in a given

When you push a toy car it eventually stops this is due to something called

How are sky maps made?

Which element in period 3 on the periodic table is a metallioid

Your 300 mL cup of coffee is too hot to drink when served at 87.0 degrees Celsius. What is the mass of the ice cube, taken from a - 15.0 degrees Celsius freezer, that will cool your coffee to a pleasant 65 degrees Celsius?

How can the same material bend in one situation but break in another

According to Newton's first law of motion, what would happen to a car traveling at a constant velocity of 55 MPH to the west in the absence of an unbalanced force?

The Appalachian mountain range in the Eastern United States was once much taller than the Rocky mountain range in the Western United States.