Our first goal is to measure and compare the angular momentum of the two-disk system before and after the small disk is dropped on the larger disk. Begin by measuring the angular speed of the large disk before the small disk is added. Calculate this initial angular momentum using the masses given above. Then, measure the angular speed of the two disks rotating together. Using this new velocity, calculate the final angular momentum of the two-disk system. Calculate the percent difference:

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Ineed the answer to question 1 , i’m desperate

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer