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At night an underwater scuba diver aims his flashlight beam toward the surface at an angle of 45 degrees with?

January 2, 2010 | By Admin In Physics | Comments(0)
scuba
Michael B asked:


At night an underwater scuba diver aims his flashlight beam toward the surface at an angle of 45 degrees with the normal. Upon emerging, the beam angle will be?

a. less than 45 degrees.
b. 45 degrees.
c. more than 45 degrees.
d. impossible to predict.

Filed under: Physics

Is Swimimg a requirement for scuba diving?

January 1, 2010 | By Admin In Swimming & Diving | Comments(0)
scuba diving
teclishk asked:


Is it a must to know swimming before you do scuba diving? or you can learn both together?
I just wonder, if you do not know how to swim at all, is it possible to do scuba diving? since I think that it is a totally different technique.

Filed under: Swimming & Diving

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