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3 years ago

List how many significant figures the numbers contain. A. 205 cm. B. .00004 cm. C. 20 cm. D. 20. Cm.

1 answer:

7 0

A. 205 cm
This has 3 significant figures: 2,0 and 5.

B. 0.00004 cm
This has 1 significant figure: 4

C. 20 cm
This has 2 significant figures: 2 and 0.

D. 20. cm
This has 2 significant figures: 2 and 0

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580 nm light shines on a double slit with d=0.000125 m. What is the angle of the third dark interference minimum(m=3)?

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0.796 degree

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4 years ago

4. Sally applies a horizontal force of 462 N with a rope to drag a wooden crate across a floor with a constant speed. The rope t

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Answer:

-6,329.5Joules

Explanation:

Complete question:

Sally applies a horizontal force of 462N with a rope to drag a wooden crate across a floor with a constant speed the rope tied to the crate is pulled at an angle of 56.0degree and sally moves the crate 24.5m. What work is done by the floor through the force of friction between the floor and crate.

Work done = Fd cos theta

F is the horizontal force

d is the distance covered

theta angle of inclination

Substituting into the formula

Workdone = 462(24.5)cos 56

Workdone = 11,319(0.5592)

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3 years ago