Plz i need i will give u brainlest plz what do active solar heat systems have that passive systems do not have? a. fans and pumps b. tubes for conducing heat c. areas to collect sunlight d. solar collectors

Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

What must occur for air masses to form fronts