Average speed is worked out from dividing distance by time.
Answer:
1.30
Explanation:
To calculate the critical angle we have ti use the formula:

where theta_c is the critical angle, n1 is the index of refraction of the material where the light is totally reflected, and n2 is the refractive index of the other material.
By taking n_2 and replacing we obtain:

hope this helps!!
Answer:
atom
Explanation:
Smallest particle of an element that identifies that element is an atom.
Answer: the work will also increase by double
Explanation:
This is because they are directly proportional in the formula w=f x d