Review the content given in the image below and summarize the key points. PHYSICS-IC It is independent

Review the content given in the image below and summarize the key points.

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PHYSICS-IC It is independent of : a) amount of the fluid b) shape of the container etc., So, PHYS if a given liquid is filled in vessels of different shapes up to same height. the at the base in each vessel will be same, though the volume or weight of the liquid pressure will be different in different vessels. (A) At the base, P = Pg = Pc but wA < WB <Wc (weight) (iv) in a static liquid at same level, the pressure will be same at all points provided, the points are in communication with one another. This is why, the height of liquid %3D %3D is the same in vessels of diffeent shapes (B) %3D %3D %3D %3D Here PA = Pg = Pc = Pp = Pg and h, = hg = hc = h, = hg %3D %3D %3D B hA hB hc hp hE (C) B E: Fig. 2.6 = PD PE = Pc %3D PA PB Also, hA hg hc hp he %3D %3D Fig. 2.7 (v) In case of a fluid, P = Po + hpg. So, if P, is changed by APo, then the increase in pressure at a given point is AP= AP + A(hpg)= AP, (:. hpg is a constant for a given point). %3D Barometer is used Therefore, 'if an external pressure is applied to an enclosed fluid it is tranmitted to measure to every point in the fluid, undiminished'. This is known as Pascal's law atmospheric (vi) Barometer is used to measure atmospheric pressure while manometer can be used to measure the pressure difference, i.e., gauge-pressure. pressure Measurement of Pressure using Barometer and pressure difference using manometer Atmospheric pressure and Gauge Pressure The pressure of the atmosphere at any point is equal to the weight of a column of air of unit cross sectional area extending from that point to the top of the atmosphere. At sea level it is 1.03 x 10 Pa (1 atm). Italian scientist Evangelista Torricelli devised a method for measuring atmospheric pressure. A device with along glass tube closed at one end and filled with mercury is inverted into a trough Manometer is used to measure the of mercury as shown in Fig. 2.8(a). This device is known as mercury barometer. The space above pressure difference the mercury column in the tube contains only mercury vapour whose pressure P is so small Fig. 2.8 (a) that it may be neglected. The pressure inside the column at point M must be equal to the pressure at point N, which is at the same level. 46 ELITE SERIES for Sri Chaltanya Jr. ICON Students %3D 1114 1111 11 PHYSICS-IC It is independent of : a) amount of the fluid b) shape of the container etc., So, PHYS if a given liquid is filled in vessels of different shapes up to same height. the at the base in each vessel will be same, though the volume or weight of the liquid pressure will be different in different vessels. (A) At the base, P = Pg = Pc but wA < WB <Wc (weight) (iv) in a static liquid at same level, the pressure will be same at all points provided, the points are in communication with one another. This is why, the height of liquid %3D %3D is the same in vessels of diffeent shapes (B) %3D %3D %3D %3D Here PA = Pg = Pc = Pp = Pg and h, = hg = hc = h, = hg %3D %3D %3D B hA hB hc hp hE (C) B E: Fig. 2.6 = PD PE = Pc %3D PA PB Also, hA hg hc hp he %3D %3D Fig. 2.7 (v) In case of a fluid, P = Po + hpg. So, if P, is changed by APo, then the increase in pressure at a given point is AP= AP + A(hpg)= AP, (:. hpg is a constant for a given point). %3D Barometer is used Therefore, 'if an external pressure is applied to an enclosed fluid it is tranmitted to measure to every point in the fluid, undiminished'. This is known as Pascal's law atmospheric (vi) Barometer is used to measure atmospheric pressure while manometer can be used to measure the pressure difference, i.e., gauge-pressure. pressure Measurement of Pressure using Barometer and pressure difference using manometer Atmospheric pressure and Gauge Pressure The pressure of the atmosphere at any point is equal to the weight of a column of air of unit cross sectional area extending from that point to the top of the atmosphere. At sea level it is 1.03 x 10 Pa (1 atm). Italian scientist Evangelista Torricelli devised a method for measuring atmospheric pressure. A device with along glass tube closed at one end and filled with mercury is inverted into a trough Manometer is used to measure the of mercury as shown in Fig. 2.8(a). This device is known as mercury barometer. The space above pressure difference the mercury column in the tube contains only mercury vapour whose pressure P is so small Fig. 2.8 (a) that it may be neglected. The pressure inside the column at point M must be equal to the pressure at point N, which is at the same level. 46 ELITE SERIES for Sri Chaltanya Jr. ICON Students %3D 1114 1111 11

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Key points are 1 Pressure is independent of amount of liquid and shape of container ... View the full answer