Question

The mass of a solid iron cube of side 4 cm is to be determined. Out of the four spring balances available, the one best suitable for this purpose would have what range? Density of iron is 7.8 g/cc. Range = 0 to 1000 g, and least count = 10g Range = 0 to 100 g, and least count = 1g Range = 0 to 100 g, and least count = 25g Range = 0 to 100 g, and least count = 5g

Answer 1

Volume of cube = $side^{3}$
                             = $(4cm)^{3}$
                              =$64cm^{3}$

Density = Mass/Volume
So,         Mass = Volume * Density
 
Mass of Cube=$64cm^{3}$*7.8g/$cm^{3}$
                       = 449.2 g
Hence, the most suitable Spring Balance is one that has
Range = 0 to 1000 g, and least count = 10g

Answer 2

Answer:

Range = 0 to 1000 g, and least count = 10g

Explanation: