Two charges q1 and q2 are separated by a distance d and exert a force f on each other. what new force f′ would exist if q1 is quadrupled and d is tripled? 1. f′ = (9/4) f 2. none of these 3. f′ = 0 4. f′ =(4/9)f 5. f′ =(9/81)f 6. f′ =(81/16)f 7. f′ =(16/81)f 8. f′ =(81/9)f

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) .

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?