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vivado [14]
3 years ago
9

A balloon used in surgical procedures is cylindrical in shape. as it expands outward, assume that the length remains a constant

. find the rate of change of surface area with respect to radius when the radius is (answer can be left in terms of π).
Physics
1 answer:
DochEvi [55]3 years ago
6 0
A cylinder's volume is π r² h, and its surface area is 2π r h + 2π r².  Since there is no length and radius. Let is denote the length by 80 mm and 0.30 mm radius.
Surface area, A = 2 (pi) r * 80 = 160(pi)r 
dA / dr = 160 (pi)
160.0π mm^2/mm is the answer.
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Any two application of gravity
Brrunno [24]

Answer:

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Well our first application has helped us to send satellites around the solar system with what Nasa calls gravity assist. Using a particular planets gravity to slingshot a satellite to another destination. Look it up.

The next application much simpler but here on Earth. There are many hydro-electric power stations in use all over the world. Water is stored at a high level and released falling 100s of metres to a turbine where it generates electricity.

Hope that helps.

Explanation:

5 0
3 years ago
A heating element has a resistance of 180 Ω and draws a current of 1.60 A. What is its power?
iragen [17]

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5 0
2 years ago
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9. How does the length of the hypotenuse in a right triangle relate to the lengths of the legs? (2 points)
konstantin123 [22]
<span>The pythagorean theorem addresses the length of the hypotenuse in relation to the length of the legs. The square root of the length of the hypotenuse is equal to the sum of one leg squared plus the other leg squared. In other words, A squared plus B squared equals C squared where A and B are the lengths of the legs of the triangle and C is the length of the hypotenuse.</span>
6 0
3 years ago
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A large pot is placed on a stove and 1.2 kg of water at 14°C is added to the pot. The temperature of the water is raised evenly
CaHeK987 [17]

Answer:

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3 0
3 years ago
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zysi [14]

Answer:

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Explanation:

The strength of the electrostatic force exerted on a charge is given by

F=qE

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In this problem,

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So the strength of the electrostatic force is

F=(-3.0\cdot 10^{-6}C)(1.5\cdot 10^4 N/C)=-0.045 N

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