An object has an emissivity of 0.725. At temperature T, it radicates heat at a rate of 10 W. What is its rate of heat radiation at temperature 2 T

Formulate and write a computer program to determine the effects of pressure ratio, minimum/maximum temperature ratio, compressor efficiency, and turbine efficiency on overall cycle efficiency, net-work output per unit mass, and back-work ratio of an

1. You are in a car at a stop sign. The car accelerates from 0 to 45 mph in 4 seconds. What is your car's acceleration?

It takes about four minutes to bake a potato in a 1000 W microwave oven. How much energy is used? Answer:.07kWh

The atomic number of an element is determined by the number of A. electrons. B. protons. C. protons and neutrons. D. neutrons.

What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? Use 1.67*10-27 kg for the mass of a proton, 1.60*10-19 C for the magnitude of the charge on an electron, and 9.

An unknown fluid has a specific gravity of 0.750. What is the volume of 22.5 kg of this fluid? A. 10 L B. 20 L C. 30 L D. 40 L

What kind of tide is responsible for extreme tides

What does the speed of sound depend on? A. Medium that the sound travels through B. Acoustics C. Frequency of the sound D. Loudness of the sound

Which of these is not a source of the shock waves that lead to protostars?

Which kind of information is known about a person if that person's DNA is in a database? A. how old the person is B. where the person was probably born C. some diseases the person might have D. whether the person is likely to commit a crime