The mass per unit volume of a substance is called density (density = mass/volume).
Arrange the following in order of increasing density − air, exhaust from chimney, honey, water, chalk, cotton, and iron.
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The volume of 50 g of a substance is 20 cm3 . If the density of water is 1 g cm−3 , will the substance float or sink?
If the density of an object is more than the density of a liquid, then it sinks in the liquid. On the other hand, if the density of an object...
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The force of attraction between two unit point masses separated by a unit distance is called
(d) universal gravitational constant
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Number of individuals of a population in a habitat per unit area is called density and density is measured in different units.
a. Nos. / Vol; b. Coverage / area; c. Biomass / area d. Nos. / area; e. Wt. / area
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Number of individuals of a population in a habitat per unit area is called density and density is measured in different units
a. Nos. / Vol; b. Coverage / area; c. Biomass / area; d. Nos. / area; e. Wt. / area
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Comment on the statement that “colloid is not a substance but a state of substance”.
Common salt (a typical crystalloid in an aqueous medium) behaves as a colloid in a benzene medium. Hence, we can say that a colloidal substance does not represent a separate...
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A dimensionless quantity (a) never has a unit, (b) always has a unit, (c) may have a unit, (d) does not exist.
(c) may have a unit, Explanation: Dimensionless quantities may have units.
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If CP and CV denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then?
(b) : Molar heat capacity = Molar mass × specific heat capacity So, the molar heat capacities at constant pressure and constant volume will be 28CP and 28CV respectively Therefore, 28CP –...
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Consider a planet in some solar system which has a mass double the mass of the earth and density equal to the average density of the earth.
(d) 21/3 W at the planet. EXPLANATION: Since the density is same the volume and hence the radius of the planet will be more than the radius of the earth. Let the...
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Consider a planet in some solar system which has a mass double the mass of the earth and density equal to the average density of the earth,
(d) 21/3 W at the planet. EXPLANATION: Since the density is same the volume and hence the radius of the planet will be more than the radius of the earth. Let the radius...
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What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)?
The correct answer is b. 200
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