A person holds a rifle horizontally and fires at a target. The bullet leaves the muzzle of the rifle with a velocity of 420 m/s. Two seconds later the person hears his bullet strike target. What is the distance between the shooter and the target ? ( Given , temperature = 25 ° C )

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?