Tom has built a large slingshot, but it is not working quite right. he thinks he can model the slingshot like an ideal spring with a spring constant of 45.0 n/m. when he pulls the slingshot back 0.235 m from a nonstretched position, it just does not launch its payload as far as he wants. his physics professor "" by telling him to aim for an elastic potential energy of 14.5 j. tom decides he just needs elastic bands with a higher spring constant. by what factor does tom need to increase the spring constant to hit his potential energy goal?

answer: f

explanation: g

does anyone know or what?

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

no

explanation:

no i dont know how to solve this you should probably try to google the answer