An object is placed 21 cm from a concave lens of focal length 25 cm. What is the magnification?

A)

-0.54
B)

0.54
C)

-0.32
D)

-0.22
E)

0.22


B

Physics & Space Science

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A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 20° with a speed of 24.5 m/s. What is the minimum coefficient of static friction required for the car not to skid?

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Which of the following statements about degeneracy pressure is not true?

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A box is being pulled across a rough floor at a constant speed. What can you say about the work done by friction?

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