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If 200 grams of water is to be heated from 24.0 degrees to 100.0 degrees to make a cup of tea, how much heat must be added?
Q = C x m x dT Q = 4.18 x 0.2 x (100 - 24) Q = 73.112 J/g.C
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With Method two it metions it can also be used with the radius. However in the explanation it only shows side length. So would I use the same formula but use the radius instead of the side length?
The radius of a hexagon is the same as the side length, because the circle is inscribed in the hexagon. So just use the same formula and plug it in.
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How do I find the area of a sector if I know the diameter and the arc length?
Divide the diameter by 2. That gives you the radius. Multiply the radius by the arc length, then divide by 2 again. That gives you the sector area.
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How do I find the angle of a sector if I have arch length and radius?
Double the radius, then multiply by pi. That gives you the circumference. Divide the length of the arc by the length of the circumference. That gives you the fraction of...
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How many yards of concrete in an area 8 feet x 5 feet x 5 inches deep?
First multiply 8 by 5 by 5/12 = 16.67 cubic feet. Then divide by 27 (or multiply by 0.037) to find cubic yards.
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How many cubic feet are in a hole 104 feet wide by 208 length by 14 feet tall?
Multiply 104 x 208 x 14 to find the answer.
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In the above example cosθ was 1/√2. But here cosθ can be 45 degrees or 315 degrees. Why is that the answer is not 315?
When you find the angle between 2 vectors, the angle is always going to be between 0° and 180°.
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What is the area of a semicircle with the radius of 1.4 m?
Given a radius of circle = 1.4m. As we know, the area of semicircle=((pie)*r*r)/2=(3.14*1.4*1.4)/(2)=3.078 m square.
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How do I find the radius of a sphere if I know its volume is three times its surface area?
Write an equation whereby the volume [(4πr³) / 3] is set equal to three times the surface area (4πr²). Thus, [(4πr³) / 3] = 12πr². Divide both sides by 4π,...
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Two solid spheres A & B are made of the same material. The radius of B is 3 times the radius of A, and the surface area of A is 20 cubic cm. How do I calculate the surface area of B?
The surface area (S) of a sphere equals 4πr², where r is the radius. Using that equation to solve for r: r = √(S / 4π). Now substitute 20 for...
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