The direction of an electric field is defined as the direction of the force on a ... - either positive test charge, or a negative test charge
- negative test charge
- positive test charge

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.

If the pressure in a gas is doubled while its volume is held constant. true or false

Bonds within one water molecule are examples of