Three wires are made of copper having circular cross sections. Wire 1 has a length l and radius r. Wire 2 has a length l and radius 2r. Wire 3 has a length 2l and radius 3r. Which wire has the smallest resistance?

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) .

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.