Ascuba diver, submerged under water looks up and seessunlight
at an angle of 30 degrees from the vertical. atwhat
angle measured from the vertical does the sunlight strike
thesurface of the water? assume water has a refraction index
of1.333.

Explanation:

= Refraction index of water = 1.333

= Refraction index of air = 1

= Angle of sunlight = 30°

From Snell's law we have

The angle measured from the vertical does the sunlight strike thesurface of the water is

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the closer the planet is to the sun, the larger the gravity