Afootball punter accelerates a football from rest to a speed of 10m/sec during the time in which his toe is in contact with the ball (about 0.2 sec). if the football has a mass of 0.5 kg, what average force does the punter exert on the ball?

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 is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Explain why you think this diagram shows what happened to the carbon in the biodome.