An 800-N billboard worker stands on a 4.0-m scaffold supported by vertical ropes at each end. If the scaffold weighs 500 N and the worker stands 1.0 m from one end, what is the tension in the rope farthest from the worker?

a. 450 N
c. 800 N
b. 500 N
d. 850 N


A

Physics & Space Science

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Photon A has a higher energy than photon B. Given this information, which of the following statements is true?

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The basic function of a carburetor of an automobile is to atomize the gasoline and mix it with air to promote rapid combustion. As an example, assume that 30 cm3 of gasoline is atomized into N spherical droplets, each with a radius of 2.0 × 10^?5 m. What is the total surface area of these N spherical droplets?

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A hydrogen atom is excited to the n = 9 level. Its decay to the n = 6 level detected in a photographic plate. What is the frequency of the light photographed? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)

A) 5910 nm B) 5910 Hz C) 5.08 × 1013 Hz D) 3.28 × 10-9 km

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In a one-dimensional system, a standing wave is the result of ________

A) two equal amplitude, equal wavelength waves traveling in the same direction. B) two waves of different amplitude, but equal wavelength traveling in the same direction. C) two waves of different frequency, but equal amplitude traveling in the same direction. D) two waves of different frequency, but equal amplitude traveling in opposite directions. E) two equal amplitude, equal wavelength waves traveling in opposite directions.

Physics & Space Science