1. The speed of light in a material is 1.93 x 10 8 m/s. What is the index of refraction of the material? 2. Light travels from water (index of refraction 1.33) into crown glass (index of refraction 1.52) at an angle of incidence of 42.0 degrees. Find the angle of refraction in the crown glass. (Ans: 35.8 degrees)
3. Determine the index of refraction of a liquid material if the angle of incidence in air is 40.0 degrees and the angle of refraction in the material is 25.9 degrees?

can someone solve and do working of these 3 questions please thanks alot.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

What is the celsius value for 65 farenhiet