Which elements do hydrogen fuel cells combine to produce electricty

How many centimeters are in 24 meters

Doubling which quantity would cause the largest increase in a spring's elastic potential energy?

What do waves transfer from place to place? a) motion b) energy c) matter d) water

Dr. Halite combined sodium metal with chlorine gas to make sodium chloride (table salt). the chemical reaction used up all of the metal and all of the gas. If Dr.

A rock with mass m = 3.60 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 15.

Can a simple machine's efficiency ever be greater than 100%? Explain your answer.

A fishbowl has a circular opening with a diameter of 13 cm. The fishbowl sits upright on a table in a magnetic field of 0.00110 T that is directed downward. What is the flux through the glass of the bowl? -1.5*10^-5 Wb -4.5*10^-4 Wb 0.0 Wb -5.

Why do cars need a cooling system in conjunction with the engine

A runner starts from rest and has an acceleration of 3 m/s2. How fast is she running after 1.1 seconds

Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?