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Answer 1

Answer:

1*The mass density (ρ) of a substance is the mass of one unit volume of the substance. ... The relative density is the ratio of the mass of the substance in air at 20 °C to that of an equal volume of water at the same temperature.✔✔✔✔

2*----The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.✔✔✔✔Mass does not change with location. To find an object's mass using its weight, the formula is Mass equals Weight divided by the Acceleration of Gravity (M = W ÷ G). Convert the weight measured in pounds to the equivalent in Newtons.----extra calculation------3*Spring balance is used to measure the weight of the body whereas beam balance is used to measure the mass of the body. Since the mass of the body remains the same on earth as well as on moon but the acceleration due to gravity differs✔✔✔✔☺Subscribe ----my channel ----Singh adi army lover----youtube----like lion