Calculate the efficiency of an engine in a power plant operating between 40 ° c and 320 °

c. remember that the efficiency is a decimal number less than 1.

What describes a basic principle of nature that always occurs under certain conditions.

A man is riding his 4-wheeler at 60 km/hr. If he is riding it constantly at this rate for 1.5 hours, how far did he ride?

Which instrument is used to measure altitudes in aircraft's?

Gwendolyn has a mass of 17 kg. she is riding her scooter at 1.15 m/s to the right when she runs into maya. maya has a mass of 13 kg and is standing on her scooter but not moving. when they collide, the girls grab onto each other and move together.

An unknown element is found to have two naturally occurring isotopes, 200X and 210X with atomic masses of 200.028 and 210.039 respectively. If the percent abundance of 200X is 40.00%, what is the average atomic mass of X.

Spiral galaxy rotation curves are generally fairly flat out to large distances. Suppose that spiral galaxies did not contain dark matter.

How are the functions of the cytoskeleton and the cell wall similar

1. How many electrons does the K level of an atom hold?

A puck traveling at 6 m/s in the + x direction hits a wall and bounces back. Right after the collision with the wall it is traveling in the - x direction at 6 m/s.

Sunlight, wind, and running water are essentially "free." Yet renewable energy sources are a very small part of our energy consumption. Why is this?