help me with this give me an answer I don't know how to solve it please Calculating the speed of light in a medium: What is the speed of light in a rectangular prism if its index of refreaction is 1.5? Given: speed of light in a vacuum v = 3.00 x 108 m/s Index of refraction of ethyl alcohol n = 1.5 Required: Find the speed of light in the prism. Analysis and Solution:

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

Anions are negative charged ions

The answer is 4 i don't know if its right let me see.

Idon't know hope someone you