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<span>This problem is solved by the law of effusion, which states that the rate of effusion is ~ 1/sqrt(molecular weight). Calculate the molecular weights of the different gases:
HBr = 80.91 g/mol
NO2 = 46.0055 g/mol
C2H6 = 30.07 g/mol
Thus, the approximate relative rates are HBr ~ 0.112, NO2 = 0.1474 and C2H6 = 0.1824.
Answer: C2H6 effuses fastest.</span>
Answer:
0.3 m
Explanation:
When a person is myopic it means that light rays from distant object are focused in front of retina so in order to correct this, we use concave lens. The concave lenses focuses these rays on the retina.
Wearing glasses will not change the eye in any way. The diverging lens is simply used to form an image of the object at a distance where the myopic person can see it clearly. Another myopic individual that is not wearing a lens can see clearly objects that fall between their near point and their far point, as well as an individual wearing glasses can see images that fall between their near point and their far point.
Lens' power= -3 diopters = 1/ focal length,f.
Therefore, f= 1/-3 = - 0.3
Far point = -(-0.3) = 0.3 m
