Question

If the mass of a cube of side 4 cm is 512 grams, find its density :
(i) in S.I. units
(ii) in c.g.s units

Answer 1

Density

Explanation:

side of cube = 5 cm

Volume = 5 * 5* 5 = 125 cu. cm. = 0.000125 cu. m.

mass = 512 gm = 0.512 kg

density = mass / volume

In SI units,  kg/m3  

Density = 0.512 / 0.000125 = 4096  kg/m3

In CGS units, density is grams per cubic centimeter = 512 / 125 = 4.096 gm/cm3

Answer 2

Answer:

force which produces unit acceleration in unit mass In SI, force is measured in newton (N).

force which produces unit acceleration in unit mass In SI, force is measured in newton (N).Force is said to be I N, if it produces an acceleration of I ms-² in a body of mass 1 kg.

force which produces unit acceleration in unit mass In SI, force is measured in newton (N).Force is said to be I N, if it produces an acceleration of I ms-² in a body of mass 1 kg.The C.G.S. unit of force is dyne. If m = 1 g;a = | cms-² : F= l dyne.

force which produces unit acceleration in unit mass In SI, force is measured in newton (N).Force is said to be I N, if it produces an acceleration of I ms-² in a body of mass 1 kg.The C.G.S. unit of force is dyne. If m = 1 g;a = | cms-² : F= l dyne.Hence, force applied is said to be 1 dyne if it produces an acceleration of 1 cms-² in a mass of 1g, 1 N = 10^-5 dyne.