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Otrada [13]
3 years ago
14

A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is

8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?
Physics
1 answer:
-Dominant- [34]3 years ago
6 0
We will find the mass from 
mass = density x volume 
We are told the density and must find the volume from the dimensions given 
the volume of the washer will be the area x thickness (remembering to convert all measurements to meters) 
if the washer had no hole, its area would be pi (0.0225m)^2 (remember to convert to meters and to use radius) 
the area of the hole is pi(0.00625m)^2 
so the area of the washer is pi[(0.0225m)^2 - (0.00625m)^2] = 1.5x10^-3 m 
the volume of the washer is 1.5x10^-3 m x 1.5x10^-3 m = 2.25x10^-6 m^3 (the thickness of the washer is 1.5 mm = 1.5x10^-3m) 
thus, the mass of the washer = 8598kg/m^3 x 2.25x10^-6m^3 = 0.0189kg = 18.9 grams
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Answer:

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Let's examine the statements, the moment of inertia depends on

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4 0
3 years ago
Why is it important to know the location of active and inactive faults in our country?
Andrew [12]

Answer:

I hope this helps.

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A small object begins a free-fall from a height of =81.5 m at 0=0 s . After τ=2.20 s , a second small object is launched vertica
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Answer:

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Explanation:

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y = y₀ + v₀ t + ½ at²

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193.216 = 61.56t

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The position at that time is:

y = 81.5 − 4.9(3.139)²

y = 33.2

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8 0
3 years ago
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