Atelescope that uses optical lenses is referred to as a telescope

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

With i really need the correct answer!

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation