Air at 27 ºC and 5 atm is throttled by a valve to 1 atm. If the valve is adiabatic and the change in kinetic energy is negligible, what is the exit temperature of the air?

A car travels at 20 meters per second. What is its rate in kilometers per hour? 72 kilometers per hour 5.6 kilometers per hour 1.2 kilometers per hour 56 kilometers per hour

Which words describe the composition of the inner planets? Select three options,

Give an example of a scientific hypothesis. Explain how you would test it, and how it could be falsified (proved untrue).

Support that P (e) = 0.76, P (F) = 0.45, and P (E and F) = 0.32. What is P (E or F) ?

When you burn natural gas in the laboratory, methane burns. What numbers fill in the blanks to balance this equation? ___CH4 + ___O2? ___CO2 + ___H2O A. 1, 2, 2, 1 B. 1, 2, 1, 2 C. 2, 4, 2, 4

Why does it take 10 times more energy to grow a kilogram of beef than a kilogram of wheat?

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is Nm. If the same force moves the same cart three times that distance, the work done is Nm. NextReset

1. Identify this mystery element: I am very reactive, I desperately want to get rid of my electron. When I make a compound with Chlorine it is table salt. Who am I? 2. Identify this mystery element. I am amazing and have no cares in the world.

Since all stars begin their lives with the same basic composition, what characteristic most determines how they will differ? 1. location where they are formed 2. time they are formed 3. luminosity they are formed with 4. mass they are formed with 5.

What primarily involves heat transfer by convection?