Arihant Physics by D.C Pandey

Two rain drops of same radius r falling with terminal velocity v merge and from a bigger drop of radius R. The terminal velocity of the bigger drop is Two rain drops of same radius r falling with terminal velocity v merge and from a bigger drop of radius R. The terminal velocity of the [...]

A block of wood floats in water with 4/5​th of its volume submerged, If the same block just floats in a liquid. The density of the liquid is (in kg/m^3) A block of wood floats in water with 4/5​th of its volume submerged If the same block just floats in a liquid. The density of [...]

A cubical vessel of height 1m is full of water. What is the amount of work done in pumping water out of the vessel? (Take g=10m/s^2) A cubical vessel of height 1m is full of water. What is the amount of work done in pumping water out of the vessel? (Take g=10m/s^2) September 17, 2020 [...]

A body floats in water with 40% of its volume outside water. When the same body floats in an oil. 60% of its volume remains outside oil. The relative density of oil is: A body floats in water with 40% of its volume outside water. When the same body floats in an oil. 60% of [...]

An object weights m1​ in a liquid of density d1​ and that in liquid of density d2​ is m2​. The density d of the object is An object weights m1​ in a liquid of density d1​ and that in liquid of density d2​ is m2​. The density d of the object is September 17, 2020 [...]

A stone of relative density k is released from rest on the surface of a lake. If viscous effects are ignored, the stone sinks in water with an acceleration of A stone of relative density k is released from rest on the surface of a lake. If viscous effects are ignored the stone sinks in [...]

Mass of solid floating in liquid is m1 and mass of liquid is m2. Base area is A. Then pressure at bottom is p0+(m1+m2)g/A Reason : Upward force on liquid from base of vessel is pA, where p is pressure at bottom. Mass of solid floating in liquid is m1 and mass of liquid is [...]

Assertion A solid is floating in a liquid of density p1. when the solid melts its density becomes p2 in liquid state. If p1 > p2 level of liquids will increase after melting. Reason In liquid state volume always increases after a solid melts. Upthrust will remain same September 17, 2020 Category: Arihant Physics by [...]

Assertion : A solid is floating in a liquid . If temperature is increased and expansion of solid is ignored, then fraction of volume immersed will increase. Reason : By increasing the temperature density of liquid will decrease. Assertion : A solid is floating in a liquid . If temperature is increased and expansion of [...]

Assertion : If water is filled in a balloon and this is immersed in water itself. Then volume of water displaced is equal to the volume of water filled in the balloon. Reason : Volume of a liquid displaced is equal to the volume of solid immersed in that liquid. Assertion : When an ideal [...]