Question 511 MarkName the quantity whose one of the units is Pascal $(Pa).$AnswerPressure has unit of Pascal $(Pa).$View full question & answer→
Question 521 MarkIf the weight of a body on the earth is $6 N,$ what will it be on the moon$?$AnswerWeight of the body on the surface of moon will be $1N$ approx. as the value of g on the surface of moon is one-sixth that of the earth.View full question & answer→
Question 531 MarkWhich is more fundamental, the mass of a body or its weight? Why?AnswerThe mass of a body is more fundamental because mass of a body is constant and does not change from place to place.View full question & answer→
Question 541 MarkWhat is the scientific name of the ‘upward force’ acting on an object immersed in a liquid?AnswerBuoyant force or upthrust.View full question & answer→
Question 551 MarkWrite the common unit of density.AnswerGrams per cubic centimeter $\left(\mathrm{g} / \mathrm{cm}^3\right)$.View full question & answer→
Question 561 MarkWhat is upthrust?AnswerThe upward force acting on an object immersed in a liquid is called upthrust.View full question & answer→
Question 571 MarkWhat is the relation between pressure, force and area?Answer$\text{Pressure}=\frac{\text{Force}}{\text{Area}}$View full question & answer→
Question 581 MarkName these force: The force which stops you falling through the floor.AnswerReaction force.View full question & answer→
Question 591 MarkName the principle which gives the magnitude of buoyant force acting on an object immersed in a liquid.AnswerArchimedes’ Principle.View full question & answer→
Question 601 MarkWhat type of force is involved in the formation of tides in the sea?AnswerGravitational force (exerted mainly by the moon and to some extent by the sun) is involved in the formation of tides in the sea.View full question & answer→
Question 611 MarkAn iron nail sinks in water but it floats in mercury. Why?AnswerAn iron nail sinks in water but it floats in mercury because density of iron is more than that of water but less than that of mercury.View full question & answer→
Question 621 MarkWhat force is responsible for the earth revolving round the sun?AnswerGravitational force is responsible for the earth revolving round the sun.View full question & answer→