Which is easier to lift in the air 1 kg of steel or 1 kg of wool?

Which is easier to lift in the air, 1 kg steel or 1 kg of wool?

In which case more heat is required ? (i) Temperature of 1 kg of water is raised from 30^(@)C to 100^(@)C . (ii) Temperature of 3 kg of iorn, is raised from 30^(@)C to 230^(@)C . (specific heat of iron ="0.12 cal.g"^(-1).^(@)C^(-1) .)

Which one is greater- the force of attraction of 1 kg lead on the earth or the force of attraction of the earth on 1kg lead ?

Amount of energy comes from 1 kg of fat

Find the elastic deformation energy of a steel rod of mass m=3.1 kg stretched by a tensile strain 1.0xx10^-3 . (Density of steel 7.8xx10^3 kg//m^3 )

The number of joules in 1 kg *m is

Amount of heat required to raise the temperature of 1 kg of water by 1^@C is

The total cost of 3 kg mustered -oil and 2 kg coconut -oil is Rs. 104. While the cost of 5kg mustered -oil and 3kg coconut-oil is Rs. 164 . Find the cost of 1 kg each of both mustered -oil and coconut.