A person with limited accommodation is prescribed lenses of power –3.0 diopters for distant vision. Bifocal inserts are added to these lenses to allow vision at 50 cm. What is the power of the inserts?
a. –1.0 diopters
b. 2.0 diopters
c. 5.0 diopters
d. 50 diopters
e. This does not work with negative diopter distance lenses.
b
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Refer to Figure 6-13 Block A has a mass of 5.00 kg, block B has a mass of 3.00 kg and block C has a mass of 2.00 kg. The pulleys are ideal and there is no friction between block B and the table. What is the tension in the string connecting blocks B and C?
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a. half c. quarter b. eighth d. whole
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