A marathon runner is running across a bridge. She has 10,000 J of kinetic energy, and she has 20,000) of potential energy because she is on the bridge (above the ground). What is her mechanical energy?
30,000
10.000
20,000
15,000

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You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

You can decrease the resistance of a length of wire by