the resistance of air depends to a great extent on the shape of the body
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A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle θ with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is
16
Sep
A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle θ with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is 3 different shapes [...]
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5×10^−2N (see figure). The length of the slider is 30cm and its weight negligible. The surface tension of the liquid film is
16
Sep
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5×10^−2N (see figure). The length of the slider is 30cm and its weight negligible. The surface tension of the liquid film is 3 different shapes are gives. Identify the combination of air resistances which truly represents the physical [...]
The rate of steady volume flow of water through a capillary tube of length ‘ l ‘ and radius ‘ r ‘ under a pressure difference of P is V . This tube is connected with another tube of the same length but half the radius in series. Then the rate of steady volume flow through them is (The pressure difference across the combination is P )
16
Sep
The rate of steady volume flow of water through a capillary tube of length ‘ l ‘ and radius ‘ r ‘ under a pressure difference of P is V . This tube is connected with another tube of the same length but half the radius in series. Then the rate of steady volume flow [...]
We have two (narrow) capillary tubes T1 and T2 . Their lengths are l1 and l2 and radii of cross-section are r1 and r2 respectively. The rate of flow of water under a pressure difference P through tube T1 is 8cm^3/sec. If l1=2l2 and r1=r2 what will be the rate of flow when the two tubes are connected in series and pressure difference across the combination is same as before (=P)
16
Sep
We have two (narrow) capillary tubes T1 and T2 . Their lengths are l1 and l2 and radii of cross-section are r1 and r2 respectively. The rate of flow of water under a pressure difference P through tube T1 is 8cm^3/sec. If l1=2l2 and r1=r2 what will be the rate of flow when the two [...]
A liquid is flowing in a horizontal uniform capillary tube under a constant pressure difference P . The value of pressure for which the rate of flow of the liquid is doubled when the radius and length both are doubled is
16
Sep
A liquid is flowing in a horizontal uniform capillary tube under a constant pressure difference P . The value of pressure for which the rate of flow of the liquid is doubled when the radius and length both are doubled is 3 different shapes are gives. Identify the combination of air resistances which truly represents [...]
When a body falls in air, the resistance of air depends to a great extent on the shape of the body, 3 different shapes are gives. Identify the combination of air resistances which truly represents the physical situation. (the cross sectional areas are the same).
16
Sep
When a body falls in air, the resistance of air depends to a great extent on the shape of the body, 3 different shapes are gives. Identify the combination of air resistances which truly represents the physical situation. (the cross sectional areas are the same). 3 different shapes are gives. Identify the combination of air [...]