When people use plastic combs on their hair, the combs become negatively charged. which statements about this situation are true

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

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?