A. Answer the following questions in about twenty words.
1. How does density of a substance change with temperature ?
2. Define density of a substance. Write its unit. You are given a piece of copper, how will you determine
its density ?
3. How is the floating/sinking tendency of a substance related to its density ?
4. Density of a solid is 3 g/cm². Express it in kg/m3.
5. Calculate volume of 1 kg solid if its density is 0.5 g/cm
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1. With few exceptions, density decreases as temperature increases. Density is mass divided by volume. As you heat something up, its volume usually increases. Its density increases on warming from 0 °C to 4 °C and then decreases at higher temperatures.
2. The density of a substance is its mass per unit volume. The symbol most often used for density is ρ. You can find a sample of copper's density by first weighing it. This will give you the sample's mass. Then, measure the sample's dimensions, in order to determine its volume. Finally, divide the copper sample's mass by its volume, and you will determine the density of the copper.
3. The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
4. If ur r doing g/cm3 to kg/m3, the answer is 0.001. I assume you are converting between gram/cubic centimetre and kilogram/cubic metre.
5. Density=mass/volume
=1 kg/0.5
After conversation-
10/0.5=20 g/cm.
2. The density of a substance is its mass per unit volume. The symbol most often used for density is ρ. You can find a sample of copper's density by first weighing it. This will give you the sample's mass. Then, measure the sample's dimensions, in order to determine its volume. Finally, divide the copper sample's mass by its volume, and you will determine the density of the copper.
3. The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
4. If ur r doing g/cm3 to kg/m3, the answer is 0.001. I assume you are converting between gram/cubic centimetre and kilogram/cubic metre.
5. Density=mass/volume
=1 kg/0.5
After conversation-
10/0.5=20 g/cm.
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