Solar panels generate electricity using photovoltaic cells that receive sunlight. to protect these cells from moisture while allowing sunlight to pass through, engineers must design a cover for the solar panel that is 1. waterproof and transmits light.

2. very flexible and reflects lights.

3. stronger than steel and bends light.

4. cold to touch and absorbs light

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

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?