During a football game, a receiver has just caught a pass and is standing still. Before he can move, a tackler, running at a velocity of +5.20 m/s, grabs and holds onto him so that they move off together with a velocity of +2.90 m/s. If the mass of the tackler is 129 kg, determine the mass of the receiver. Assume momentum is conserved.

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?

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.

Two positive charges are equal. which has more electric potential energy?