Question:
How to calculate the weight in newtons?
If I have a sheet of copper with a diameter of 20.0cm and a thickness of 2mm. I am trying to work out a problem but I have no idea how to figure this out. I need a detailed answer please. Thanks in advance.
Answer:
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If you want to calculate the weight,(on earth) you have to find the mass,then multiply it by 9.8m/sec^2 for kg to newtons or 32ft/sec^2. (slug to pounds.)Always have in your mind that a weight of 1lb has a mass of 0.453 kg on our earth.
First, weight is in terms of grams and kilograms. A newton is one kg that is acclerated at 1 m/sec^2, if I remember right. On earth, the earth's accleration is 9.8 m/sec^2, so whatever kg you compute will be multiplied by that to get newtons. You have to find the weight of your copper disk. Its volume, in cm^3, is pi (10^2) (0.2) or 20 pi cm^3. You can look up the density of copper in pedia, and multiply the volume by that density to get GRAMS. Now you divide that weight by 1000 to get kgs.
1. Compute the area: π r? π (10)? 314.159 cm? 2. Compute the volume: area * thickness (314.159 cm?) (0.2 cm) 62.8318 cm? 3. Look ip the density of copper: 8.96 g/cm? 4. Compute the mass mass volume * density m 62.8318 cm? * 8.96 g/cm? 562.972928 g m 0.562972928 kg 5. Compute the weight w mg w 0.562972928 kg * 9.81 m/s? w 5.52276442368 N Double check my math.
Any prescription medications you're on. Water is the best drink to store; and add powdered drink mixes like Tang or Gatorade which has electrolytes in it. Dried beans, Rice, Wheat if you know what to do with it ( if you don't--LEARN ) Macaroni , dried veggies, dried fruits,Pet food and pet supplies; Baby supplies if that applies to your household. Toilet paper, Paper plates,bowls, napkins, etc. Some sort of camping stove and fuel to cook with. Matches. Salt. That's just a bare bones minimum. There are lists everywhere on the web.
Any prescription medications you're on. Water is the best drink to store; and add powdered drink mixes like Tang or Gatorade which has electrolytes in it. Dried beans, Rice, Wheat if you know what to do with it ( if you don't--LEARN ) Macaroni , dried veggies, dried fruits,Pet food and pet supplies; Baby supplies if that applies to your household. Toilet paper, Paper plates,bowls, napkins, etc. Some sort of camping stove and fuel to cook with. Matches. Salt. That's just a bare bones minimum. There are lists everywhere on the web.
With every day pass, our country is getting into more and more trouble. The inflation, unemployment and falling value of dollar are the main concern for our Government but authorities are just sleeping, they don’t want to face the fact. Media is also involve in it, they are force to stop showing the real economic situation to the people. I start getting more concern about my future as well as my family after watching the response of our Government for the people that affected by hurricane Katrina. According to recent studies made by World Bank, the coming crisis will be far worse than initially predicted. So if you're already preparing for the crisis (or haven't started yet) make sure you watch this video at www.familysurvival.tv and discover the 4 BIG issues you'll have to deal with when the crisis hits, and how to solve them fast (before the disaster strikes your town!) without spending $1,000s on overrated items and useless survival books.
If you want to calculate the weight,(on earth) you have to find the mass,then multiply it by 9.8m/sec^2 for kg to newtons or 32ft/sec^2. (slug to pounds.)Always have in your mind that a weight of 1lb has a mass of 0.453 kg on our earth.
First, weight is in terms of grams and kilograms. A newton is one kg that is acclerated at 1 m/sec^2, if I remember right. On earth, the earth's accleration is 9.8 m/sec^2, so whatever kg you compute will be multiplied by that to get newtons. You have to find the weight of your copper disk. Its volume, in cm^3, is pi (10^2) (0.2) or 20 pi cm^3. You can look up the density of copper in pedia, and multiply the volume by that density to get GRAMS. Now you divide that weight by 1000 to get kgs.
1. Compute the area: π r? π (10)? 314.159 cm? 2. Compute the volume: area * thickness (314.159 cm?) (0.2 cm) 62.8318 cm? 3. Look ip the density of copper: 8.96 g/cm? 4. Compute the mass mass volume * density m 62.8318 cm? * 8.96 g/cm? 562.972928 g m 0.562972928 kg 5. Compute the weight w mg w 0.562972928 kg * 9.81 m/s? w 5.52276442368 N Double check my math.
