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algol13
2 years ago
7

Which of the following displays has the highest hz frequency

Physics
1 answer:
Ganezh [65]2 years ago
3 0

Answer:

Plasma

Explanation:

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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
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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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Which of the following statements describes the law of inertia?
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B. objects remain in the same state of motion unless a force acts on them

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If a 20kg object is moved across the floor and the coefficient of friction is 0.255. What is the frictional force?
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