Which explains why light bends when it passes from air to water?

a) it generates more energy.

b) it is reflected.

c) it generates heat.

d) it changes speed.

The correct answer is "it changes speed".

Explanation:

Refraction: it is the phenomenon which occurs when the light rays travel from one medium to the another medium.

In refraction, the light rays get bend due to the change in the speed of light rays.

In reflection, the light ray is reflected back in the same medium. The light ray reflected back after striking the obstacle without getting absorb or transmit in it.

Therefore, light bends when it passes from air to water due to change in the speed.

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).