A body on the surface of the earth weighs 400 lb. The radius of the earth is about 4,000 miles. If this same body were placed on a 4,000 mile high tower, its weight would be

a. 100 lbs
b. 200 lbs
c. 400 lbs
d. 800 lbs
e. 16,000 lbs


A

Physics & Space Science

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Which theory best describes today's current thinking about the birth of a solar system?

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Propped cantilever beam AB has moment M1 applied at joint B. Framework ABC has moment M2 applied at C. Both structures have con-stant flexural rigidity EI. If the ratio of the applied moments M1/M2 5 3/2, the ratio of the reactive moments MA1/MA2 at clamped support A is approximately:


(A) 1
(B) 3/2
(C) 2
(D) 5/2

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The symbol indicating the mass number of a nucleus is A

a. True b. False Indicate whether the statement is true or false

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A single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum

If monochromatic light of 530.0-nm wavelength is used for the illumination, what is the width of the slit? A) 825 nm B) 791 nm C) 757 nm D) 723 nm E) 689 nm

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