Read the questions below. check all of the nonscientific questions. how many calories will i use if i swim for thirty minutes? what is the outer part of a cell called? what influence do hormones have on emotions? why do people in my neighborhood have more cats than dogs? how can the position of stars and planets be used to predict the future? how are plants at higher elevations likely to be affected by climate change?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?