Which two gases in the atmosphere are essential to life on Earth? *

Nitrogen and Helium

Oxygen and Carbon Dioxide

Neon and Argon

Hydrogen and Helium

Since you've determined that the power supply is a 700W dual rail, what does that make the maximum output power?

Why are there more lines in the sun's spectrum than in the hydrogen spectrum?

Two identical sine waves are superimposed on one another creating a beat pattern. How far out of phase are the two waves? The speed of sound is 340 m/sec. a. 180 b. 10 c. 90 d. 360

Which of the following would decrease the resistance in a wire? Increase the thickness of the wire Increase the mass of the wire Decrease the thickness of the wire Decrease the mass of the wire

An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine the power output and the rate of heat rejection.

If you were told an atom was an ion, you would know the atom must have a

When a potential difference of 13 V is placed across a resistor, the current in the resistor is 1.4 a. What is the resistance of the resistor?

Person with a mass of50 kg jumps up from the earth with an acceleration of 20 newtons. what is his acceleration?

The electron are accelrated to a speed of 2.40*10^7 in 1.8*10^-9, the force experinced by an electron?

You are given two positively charged particles, of equal magnitude, separated by a distance, "d". What will happen to the force field between the two particles when "d" is doubled?