A basketball player pushes down with a force of 50 N on a basketball that is inflated to a gauge pressure of 8.0 × 104 Pa. What is the diameter of contact between the ball and the floor?

A)

2.8 cm

B)

1.4 cm

C)

1.7 cm

D)

2.1 cm

E)

5.6 cm


A

Physics & Space Science

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Single-Slit Diffraction: A beam of light of wavelength 610 nm passes through a slit that is 1.90 µm wide. At what the angle away from the centerline does the second dark fringe occur?

A. 11.4° B. 9.35° C. 12.2° D. 39.9° E. 18.7°

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What power contact lens is needed to correct for farsightedness where the uncorrected near point is 75 cm?

A) +2.7 D B) -2.7 D C) +5.3 D D) -5.3 D

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A boat at anchor is rocked by waves whose crests are 40 m apart and with wave speed 10 m/s. These waves reach the boat once every

A) 400 s. B) 30 s. C) 4 s. D) 0.25 s.

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Two parallel wires run in a north-south direction. The eastern wire carries 15.0 A southward while the western wire carries 6.0 A northward. If the wires are separated by 30 cm, what is the magnetic field direction at a point between the wires at a distance of 10 cm from the western wire?



A. 3.0T
B. 6.0T
C. 15T
D. 27T
E. 90T

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