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dsp73
3 years ago
6

How long would it take for a penny dropped rom the top of the Empire State Building to reach the ground if the building is 1,249

ft tall? (3.28ft=1m) Round your answer to 3 significant figures.
(please show the formula used and all work!)
Physics
1 answer:
Xelga [282]3 years ago
4 0

Use the formula for distance dropped from rest:

D = 1/2 a t^2 .

With no air resistance, you get about 8.8 sec.

I'm pretty sure you can fill in the missing work.

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explain why applying force to an object does not always result in work being done. 20 POINTS WILL MARK BRAINLIEST
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3 years ago
A double-slit experiment is set up using red light (λ = 706 nm). A first order bright fringe is seen at a given location on a sc
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Answer:

λ = 470.66 nm

Explanation:

for bright fringey_m = \frac{m\lambda D}{d}

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d= distance between the slits

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for dark fringe,we have

y_m = {(m + 1/2)\lambda D}{d}    

Now to get the dark fringes at the same location we should have;

(706)D/d = (m + 1/2)λD/d    

put m = 1

(1 + 1/2)λ = (706)

λ = 470.66 nm

6 0
4 years ago
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Answer:

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Answer:

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Electrical energy.................
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