Identification Label the following examples of electricity as either “N” for naturally
occurring electricity, or "H" for human-harnessed electricity.
1. Lightning
2. Getting shocked as you walk across carpet and touch a
doorknob
3. Crank flashlight
4. Charging a cell phone
5. Clothes sticking to each other in the dryer
6. Turning on a television
7. Hair standing straight up after removing a wool hat

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?