Q&A for How to Find Density

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  • Question
    What's the point of finding the density of an object?
    Community Answer
    Knowing how dense an object is will tell you whether or not that object will be able to float in a certain liquid. It can also tell you how much something weighs. Lastly, it can also tell you whether or not there are any impurities in a certain object, such as a crystal.
  • Question
    How do you find the density of an object if it doesn't tell you the volume or the mass?
    Community Answer
    Without the volume or the mass of an object, you can't find the density.
  • Question
    How do I find the density of a rock?
    Community Answer
    Put it on a weight scale and see how much it weighs. Then put it in a graduated cylinder and measure how much it made the water go up. Divide the mass by the volume of the object, and you get the density.
  • Question
    Which instrument do I use for measuring density?
    Donagan
    Top Answerer
    Use a weight scale and something for volume, such as a ruler or a water-displacement kit.
  • Question
    How can a liquid's density be found?
    Donagan
    Top Answerer
    Weigh a container of known volume. Fill it with the liquid. Weigh the container and liquid. Subtract the container's weight from the total weight just measured. That gives you the liquid's weight. Divide the liquid's volume into its weight to find the liquid's density.
  • Question
    How can I find volume?
    Community Answer
    Volume can be found in two ways. The easy way for most people is to measure the length, width, and height. After measuring, multiply the three measurements and there you have it: the volume. Another way is simple too but it is like lab work. In order to find the volume using that method, you will need a graduated cylinder. Once you have it, pour water into the cylinder. For easier measurement, pour the water at a whole number. The next step is to place your object in water and you'll notice the water displacement. Now subtract the original water level from the new water level and the resulting number is your volume!
  • Question
    As a liquid is heated, not up to boiling, how does the motion of its particles change?
    Community Answer
    Its molecules move faster than normal. So therefore, the speed is different in the molecules.If it keeps getting heated up, it will turn into a gas.
  • Question
    What is the density of the earth?
    Donagan
    Top Answerer
    The average density of the Earth is just over 5½ grams per cubic centimeter. That makes it the densest planet in the solar system.
  • Question
    Which measurements are needed to determine the density of a solid?
    Donagan
    Top Answerer
    You would need the weight (mass), and divide that by the volume.
  • Question
    How do I find the density of an irregular object?
    Donagan
    Top Answerer
    Find the volume through water displacement. Weigh the object, then divide its volume into its weight.
  • Question
    How do I calculate the density of an object submerged in water if I know its mass?
    Donagan
    Top Answerer
    If you don't know the object's volume, you would have to use water displacement to find it.
  • Question
    How do I find a density of a liquid?
    Donagan
    Top Answerer
    Weigh an empty container of known capacity. Fill the container with the liquid. Weigh the container again. Subtract the first weight from the second weight. That's how much the liquid weighs. Divide that by the volume inside the container.
  • Question
    How can I measure the density of rubber safety tiles? The size of the tiles is 100 cm x 100 cm x 25 mm.
    Donagan
    Top Answerer
    Weigh a tile, then divide the weight by the volume.
  • Question
    If I'm asked to weigh a powder, what will I need to weigh it?
    Donagan
    Top Answerer
    A sensitive scale (such as a postage scale or a chemistry lab scale) and perhaps a container for the powder.
  • Question
    A ball with a radius of 8 cm and a mass of 600 g is thrown into a lake. Will the ball sink or float?
    Community Answer
    the ball will float. The density of water is 1g/cm3, and by the equation density = mass/volume, we get the density of the ball 0.279, which is less than the density of water and thus floats.
  • Question
    How can I find the density if it only gives me the mass and not the volume?
    Donagan
    Top Answerer
    You can't, unless you can calculate the volume.
  • Question
    How can I find density when given only height of the tube?
    Community Answer
    You can't. You'd need to also know the radius (or diameter or circumference, from which you could calculate the radius) or be given some clue to figure it out.
  • Question
    How do I find the density of an irregular shape piece of wood that floats in water?
    Community Answer
    Tie a sinker onto it and use the displacement method to get its volume together with the sinker i.e 45 centimeters cube. Then, find the volume of the same same sinker using the displacement method i.e sinker =25 centimeters cube after which you have to subtract the total combination of the sinker and piece of wood =45 centimeters cube - sinker alone=25 centimeters cube to get the volume of the piece of wood alone =45-25 = 20 centimeters cube (volume of the irregular piece of wood). Then convert the 20 centimeter cube into grams; 1 gram = 1 centimeter cube; 20 centimeters cube divided by 20 grams.
  • Question
    How can the density of a liquid or a solution be found?
    Donagan
    Top Answerer
    Measure the mass (weight) of the liquid and its volume. Divide the volume into the mass.
  • Question
    A solid cylinder has a diameter of 17.4 mm and length of 50.3 mm, it's mass is 49g. What is its density?
    Donagan
    Top Answerer
    Calculate the volume, then divide it into the mass.
  • Question
    How do I find the density of an irregular solid?
    Community Answer
    The mass you can measure on a balance or a scale, and the volume is the amount of space the object occupies. You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up.
  • Question
    How would I find the density of a tennis ball without using the water displacement method?
    Donagan
    Top Answerer
    Measure the diameter (radius) to find the volume. Weigh it. Divide the volume into the weight.
  • Question
    How do I calculate the water displaced by a cylindrical object given its diameter and height?
    Donagan
    Top Answerer
    The volume of a cylinder is its cross-sectional area multiplied by its height = (πd²/4)h, where d is the diameter and h is the height,
  • Question
    How do I find the volume of a cylinder by water displacement?
    Donagan
    Top Answerer
    You would need a calibrated container for the water, such as a graduated cylinder. Put water in the container, then put the cylinder in the water, noting how much the water rises.
  • Question
    How do I determine whether an object is a liquid or a solid?
    Donagan
    Top Answerer
    A liquid assumes the shape of its container. A solid maintains its own shape regardless of any container that might hold it.
  • Question
    How do I measure density at high temperatures for super alloy?
    Donagan
    Top Answerer
    You would have to be able to determine accurately both the weight and volume of the material at high temperature. Such conditions would not be expected to change a super alloy's weight or volume appreciably.
  • Question
    Should I use the volume of a sphere to determine the density of a particle?
    Donagan
    Top Answerer
    "Particle" is a rather vague term. If the particle is roughly spherical and you can find its radius, yes, you could use the sphere-volume formula.
  • Question
    How do I find the density of a building?
    Donagan
    Top Answerer
    For all practical purposes, you cannot find the density. The only way to do it accurately would be to weigh the building and calculate its volume. A structural engineer might be able to help you estimate the weight.
  • Question
    How can I find the mass of an object of I can't find the weight?
    Donagan
    Top Answerer
    The mass and the weight of an object are essentially the same thing. To calculate the mass of an object, multiply its density by its volume (both being expressed in the same unit of volume).
  • Question
    How can I measure density of coffee beans without putting them in a liquid?
    Donagan
    Top Answerer
    Find their mass by weighing them. The only accurate way to find their volume is by water displacement.
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