Gravel Calculator Our gravel calculator provides a rough guide to how much gravel you will need to cover a specific area (such as a driveway). It should help you estimate the amount of stone you will need. The depth will depend on the size of the material as well as its intended use.

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Get priceStep 4: Calculate the plywood surface area. Calculate the surface area of the size of plywood you're using. This example uses 1.2m x 2.4m plywood. Plywood area = length x width. Plywood area = 1.2 x 2.4. Plywood area = 2.88m² Step 5: Calculate how much plywood is needed. Divide the total concrete surface area by the surface area of one piece ...

Get priceTo effectively work out a complex surface area, as shown left. Simply place an imaginary grid of 1” squares over the part, and count the whole squares. Then go around the perimeter and add up all the squares that are more than ½ full. Divide the total by 2 and …

Get price· Calculation of the hydraulic radius for various channel cross section shapes is an important part of using the Manning equation for open channel flow calculations. Three common open channel cross sections, the rectangle, trapezoid, and triangle, are covered in this article. The hydraulic radius for open channel flow is defined as the cross sectional area of flow divided by the wetted perimeter.

Get priceThe area below a rock can also become a source of moisture -in dry weather these spots do not dry out as fast as more exposed soil. SOME ROCKERY IDEAS TO TRY. A dry creekbed can be simply constructed by placing a layer of large pebbles and rocks in the lowest part of the garden or into an area of natural drainage such as a small gully or ...

Get price· Volume of the sphere = 4πr2. Surface area of sphere = 4 3πr3. Where, r = radius. π = 22 7. We know that the diameter of the ball is 8.5 .So the radius will be, 8.5 2 = 4.25. (As the radius is half the diameter) Let's calculate.

Get priceHow to Calculate Cross-sectional Area. If you are curious about what exactly is cross sectional area of three-dimensional objects, this article will be an informative read. Here, you will also find a list of formulas for cross sections of various geometrical objects.

Get price· The rate of heat loss of a body is proportional to this surface area; therefore in order to calculate the surface area of your rock, what you need to do is raise its temperature to a known value and then calculate how long it takes for the rock to lose temperature. From this measurement you can calculate how fast the rock is losing heat energy.

Get priceWhen building a retaining wall, DIY landscapers need accurate estimates on the amount of stone blocks, cap stones, and gravel needed to complete the project. Getting a landscaping estimate will help you plan for the cost of materials and labor to build the retaining wall, which will help you save time and money.

Get price· How to Calculate a Corrugated Metal Roof. Corrugated metal roofing is used through out the world, from Alaska to Australia to India. Its appeal owes much to the simplicity and strength of the ...

Get priceThe surface area of each rock, y, was estimated based on rock weight, x, using an equation specifically developed for riprap limestone: y = 373.13x 0.6367 where y is surface area in cm 2 and x is...

Get priceCalculating the surface area of plating anodes 1998. Hi, I will be using titanium anode baskets in a 50 gallon copper tank. The baskets are 9 inch wide and 8 inches high by 1 inch deep. How do I calculate the anode surface area if filled with 1 inch copper chunks.

Get priceFill from the bottom of the trench up to a few inches below the surface to leave room for top soil. Calculate French drain gravel needed here. For decorative purposes, install pea gravel at least 2″ deep. For decorative purposes, install river rock at least 2″ deep.

Get price· Calculation of the hydraulic radius for various channel cross section shapes is an important part of using the Manning equation for open channel flow calculations. Three common open channel cross sections, the rectangle, trapezoid, and triangle, are covered in this article. The hydraulic radius for open channel flow is defined as the cross sectional area of flow divided by the wetted perimeter.

Get priceTruncated pyramid or frustum of a pyramid is a pyramid whose vertex is cut away by a plane parallel to the base. The distance between the bottom and the top bases is the truncated pyramid height h.This page calculates volume of any truncated pyramid whose bottom and top bases are rectangles with sides a, b and c, d respectively. This truncated pyramid has 6 faces: base, top and 4 lateral faces.

Get priceThe area below a rock can also become a source of moisture -in dry weather these spots do not dry out as fast as more exposed soil. SOME ROCKERY IDEAS TO TRY. A dry creekbed can be simply constructed by placing a layer of large pebbles and rocks in the lowest part of the garden or into an area of natural drainage such as a small gully or ...

Get price· There are three main ways of measuring specific surface area. The first is through adsorption, which is where particles of a gas, liquid or dissolved solid stick to the material being measured; a common example of the process is when moisture is "soaked up" by silica gel.A complex formula known as the BET equation can calculate the surface area by using data observed during …

Get price· How to Calculate a Corrugated Metal Roof. Corrugated metal roofing is used through out the world, from Alaska to Australia to India. Its appeal owes much to the simplicity and strength of the ...

Get price· Wetted area (S_wet): The exposed surface area of each component to the fluid it is passing through. Form Factor (FF): Calculated from known geometry and usually comes from empirical data and approximations. This is often the factor that varies most in the different drag methodologies.

Get priceLateral Surface Area = a√(a 2 + 4h 2) Base Surface Area = a 2; Total Surface Area = L + B = a 2 + a√(a 2 + 4h 2)) = a(a + √(a 2 + 4h 2)) Rectangular Prism Surface Area Volume = lwh; Surface Area = 2(lw + lh + wh) Sphere Surface Area

Get price· As time goes by, rockeries continue to grow and change, looking more and more natural. Take a little time to perfect your rockery now to enjoy this unique garden feature year after year. Build a rockery in 7 simple steps: Find the perfect location: Before you build a rockery, it’s important to find the perfect location for your plants to thrive.

Get price· The Rockwell hardness is calculated using the following formula: Rockwell Hardness, HRC = [0.2 – permanent depth of indentation (mm)] x 500. The Rockwell hardness test was developed to be less destructive and cheaper than the Brinell test. Measuring hardness using differential depths helps to eliminate errors due to surface imperfections.

Get price· This video demonstrates how to find the minimum amount of material needed to manufacture a can (closed cylinder) required to hold a given volume of liquid.

Get price· How to Calculate a Corrugated Metal Roof. Corrugated metal roofing is used through out the world, from Alaska to Australia to India. Its appeal owes much to the simplicity and strength of the ...

Get priceTo effectively work out a complex surface area, as shown left. Simply place an imaginary grid of 1” squares over the part, and count the whole squares. Then go around the perimeter and add up all the squares that are more than ½ full. Divide the total by 2 and …

Get priceThe surface area of a closed cylinder can be calculated by summing the total areas of its base and lateral surface: base SA = 2πr 2. lateral SA = 2πrh. total SA = 2πr (r + h) where r is radius and h is height. Jeremy has a large cylindrical fish tank that he bathes in because he doesn't like showers or bath tubs.

Get price· Calculation of the hydraulic radius for various channel cross section shapes is an important part of using the Manning equation for open channel flow calculations. Three common open channel cross sections, the rectangle, trapezoid, and triangle, are covered in this article. The hydraulic radius for open channel flow is defined as the cross sectional area of flow divided by the wetted perimeter.

Get priceThe basic SI unit of force is the newton, which has the symbol N.One newton is defined as the force necessary to give a mass of 1 kg an acceleration of 1 m/s2. The acceleration due to gravity is normally taken as 9.81 m/s2. This is the acceleration imparted to a 1 kg force by its own weight…

Get price2nd Feb, 2015. Jay Mody. GlobalFoundries Inc. I think it depends on your application etc.. Typically, we prefer to use "Image Rq" and "Image Rmax" which is same as Rz I believe and is the sum of ...

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