How can you calculate the critical angle using the refractive index? (I know that the formula is sin c = 1/n but I'm not sure how to rearrange this so that I only have c on one side).

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

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?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.