# Weight and Mass

## Weight and mass are two commonly misunderstood terms in fluid mechanics and mechanics. Weight is the measurement of the gravitational force on an object, while mass is the measurement of the amount of matter in an object.

### What instrument measures mass? Traditionally a balance was used to measure mass. Objects of known or accepted mass was balanced against another object of unknown mass. When the balance was level the two pans had the same mass. The term balance or scales is still used even though there is no balance used. The scales were the pans that the objects sat on. Now electronic balances are used that gauge the mass of the objects. While you can measure mass with a spring loaded scale, it is less accurate than a balance as it relies on a spring loaded to a specific acceleration of gravity for any given mass. A change in altitude will change the results given on the scale, due to the actual change in gravitational force (it is small at only about 0.031% error for every kilometer increase in altitude)*. A balance would experience no such change as the mass of an unknown quantity is compared to the mass of a known quantity, thus negating any effects of gravity. Another instrument that measures mass is an inertial balance. An inertial balance doesn't require gravity to work, so it can be used in space. It measures the mass of an object by attaching it to a spring and seeing how it affects the spring's period of oscillation. Very tiny masses can be measured directly (using a "massometer"). But we normally use scales, which measure weight, which is directly proportional to mass (a property of matter equal to its resistance to a change in speed or direction of travel). The mass of an object is the same everywhere in the universe. Its weight, however, changes depending upon its location: a bowling ball has greater weight on the surface of the Earth than it does on the Moon. Great confusion arises when people interchange units of weight with units of mass. Scientists, particularly physicists, are very careful about not using the terms interchangeably, but regular folks have no choice for practical applications. For example, when you weigh a regulation ten-pin bowling ball, the scale will tell you it "weighs" between 4 and 7 (3.63 to 7.27 actually) kilograms, even though the kilogram is, technically speaking, a unit of mass, not weight. You can also measure the mass of an object using a scale, as long as you factor in the gravitational constant (G). For instance, in an environment with only 1/2 the gravity of That on earth, you would have to double the weight displayed on the scale to determine the actual mass. As an example, 10Kg of lead in a 0.5G environment would only "weigh" 5Kg on a scale...half as much as on earth, even though its mass is unchanged.

### How much is 150 pounds in kilogram? 150 pounds is equal to 68.0388555 Kilograms. 1 Pound = 0.45359237 Kilograms 150 Pounds * 0.45359237 Kilograms = 68.0388555 Kilograms. Algebraic Steps / Dimensional Analysis Formula 150 lb*1 kg 2.2046 lb=68.0388555 kg

### How many grams are in a kilogram? There are 1,000 grams (g) in a kilogram (kg) and 0.001 kilogram equal a gram. The prefix "kilo" (symbol k) in the International System of Units (SI), means one thousand. 1,000 grams in a kilo. 1000 100 1 kg = 1000 g 1 kg = 1000 grams 1 gram = 0.001 kg

### How many pounds are in a kilogram? One lb is 0.454 kg, so a tad more than 2. 1 kilogram = 2.2 pounds. (2.20462262 to be more precise). 22 pounds = 10 kilos The formula to convert kg to lbs 1 kg * 2.2046 lbs = 2.204622622 lbs kg and lbs can't be equated, since they're units of different types of quantities. The "kg" is a unit of mass, whereas the "lb" is a unit of force. On Earth, 1 kg of mass weighs 2.205 pounds. In other places, the same 1 kg of mass has a different weight. Formula: pounds x 0.454 = kilograms

### How much should an 8 month old baby weight? Baby's Age Healthy Weight Range Healthy Height Range 8 Months 7.1 Kg - 10.9 Kg 66.0 cm - 76.0 cm 8 Months 15.6 lbs - 24.0 lbs 26.0 inches - 29.9 inches

### What is the ideal weight for a 47 year old female that is 5'9? For a medium frame allow 100-102 for the first 5' in height and 5 lbs per inch thereafter So, 5'9" female should weigh 145-147 lbs. Weight ranges for health and life insurance charts have bigger ranges because they include small to large frames.

### How much does one gallon of water weigh? Weight of 1 US Gallon of water = approx. 8.35 lb (about 3.785 kg) Weight of 1 Imperial gallon (i.e. UK measure) of water weighs 10 pounds (4.536 kg) by definition, at a specified temperature and pressure.

### How much does a cubic yard of gravel weigh? A cubic foot of dry, loose gravel with 1/4" to 2" stones is 105 pounds per cubic foot. So, a cubic yard is that times 27, or 2835 lb. (There are 27 cubic feet in a cubic yard.)

### How many kilograms are in one pound? 1 pound is 0.453592 kilograms On earth, one kilogram of mass weighs about 2.205 pounds (rounded), and 0.4536 kilogram (rounded) weighs one pound.

### How do you convert is183 pounds to kg? It is 83.007 kg (approx.). Kilogram is the SI unit of mass and pound is an imperial unit of mass. To convert from pound to kg, multiply the pound unit by 0.453592.

### How do you convert litres into pounds? There is no equivalence. A pound is a measure of mass. A litre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid. If you are not convinced, consider a litre of air. How many pounds? Next consider a litre of water. How many pounds? The masses of equal volumes of the two substances will clearly be very different. There is no direct conversion between mass and volume: You need to know the density of the substance to enable you to carry out the conversion. If you can find the density of the substance (grams) then to convert the amount of litres to pounds: Convert it to kilograms to maintain the same unit Multiply the number of kilograms by 2.20462 (pounds/ kilogram) The result will be the amount of litres of the substance in kilograms

### How many pounds is 100 Kilograms? 100 kilograms = 220.462262 pounds 1 kg is equal to 2.2046 pounds. If you multiply 100 by 2.2 the answer is 220 pounds, or more precisely 220.4623 pounds.

### What is the formula to convert kg to pounds? Kilogram is the SI unit of mass and pound is an imperial unit of mass. To convert from kg to pound, multiply the kg unit by 2.20462.

### How many grams are in a tablespoon? It depends on what you're measuring. What's the tablespoon holding? Butter or oregano? Sugar or salt? Molten lead or feathers? Grams are a unit of mass (or weight) and a tablespoon is a unit of volume. Therefore it depends entirely on what you are measuring -- it depends on the density of the substance. A tablespoon of lead will be much heavier than a tablespoon of feathers (although a gram of lead and a gram of feathers weigh exactly the same!). Similarly, a tablespoon of butter weighs a different number of grams than a tablespoon of salt. See the Web Links for a handy automatic conversion calculator. Just enter the food item, the units you have, and the units you want... and presto! For instance (for US tablespoon): 1 tablespoon of water weighs 14.79 grams 1 tablespoon of table salt weighs 18.25 grams 1 tablespoon of butter weighs 14.19 grams 1 tablespoon of oil (canola or soy) weighs 13.62 grams 1 tablespoon of sugar (granulated) weighs 12.5 grams 1 tablespoon of sugar (brown) weighs 13.8 grams (packed) Some other useful conversions: 16 tablespoons = 1 cup 3 teaspoons = 1 tablespoon 28.35 grams = 1 dry ounce 1 US tablespoon = 14.7867648 ml

### What is mass divided by weight? ### How much is 69 pounds in kg? It is 31.298 kg (approx.). Kilogram is the SI unit of mass and pound is an imperial unit of mass. To convert from pound to kg, multiply the pound unit by 0.453592.

### How many units 1 N equals 1 kg X 1? A Newton ( N ) is defined as the force necessary to move 1 kilogram by 1 meter per second square ( the last term making it an acceleration; ie force ) N = (1kg x 1m ) / s^2

### How many kl are there in a ton? kl means kiloliter, this is a unit of volume. A ton is a unit of mass. There is no standard conversion from one to the other.

### How many grams of cinnamon does a teaspoon hold? You cannot directly really convert g (a solid measurement) to ml or teaspoonfuls (a liquid measurement). In an ounce, however, is 30ml or 28.3g. 30 ml is 2 tablespoonfuls, 3 teaspoonfuls in a tablespoon. I would say it is approximately 5g since there are 5ml in a teaspoonful and 28.3 and 30 aren't too far apart.