While repairing an antenna, an astronaut's lifeline to her starship comes loose and she finds herself stranded, floating 100 m from the starship. She cleverly throws a 2.0 kg wrench at 20 m/s in a direction away from the starship. If she and her spacesuit have a combined mass of 200 kg, how long does it take her to coast back to the starship

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?