A spring (with spring constant k = 45 N/m) is compressed by 0.2 meters. A 0.5 kg ball is placed on top and the spring is released in a perfect energy transfer. How
high will the ball go? (show your work and conservation df energy equations)

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

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?

Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?