Which contributions did Galileo make to the model of the solar system? Check all that apply.

1.a mathematical model for the orbits of the planets
2.scientifically accurate data on planetary orbits
3.data that showed that planets reflected sunlight similar to Earth’s moon
4.the idea that stars are other suns that do not move
5.observations of the moons of Jupiter rotating around the gas giant

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

The speed of light can be used to measure the