answer the following-
1)what we measure from spring balance mass or weight?
2)how does the pressure exerted by liduid change with depth and density?
3)how does pressure exerted by the atmosphere change with height above the ground?
answer the following-
1)what we measure from spring balance mass or weight?
2)how does the pressure exerted by liduid change with depth and density?
3)how does pressure exerted by the atmosphere change with height above the ground?
1) A spring balance measure weight as g i.e acceleration due to gravity varies so spring balance can only measure a relative quantity and mass is a absolute quantity.
2) Liquid pressure = weight density x depth
pressure depend on both density and depth. more the depth more the pressure similarly for density .
3) Air pressure at any height in the atmosphere is due to the force per unit area exerted by the weight of all of the air lying above that height. Consequently, atmospheric pressure decreases with increasing height above the ground.
1) A spring balance measure weight as g i.e acceleration due to gravity varies so spring balance can only measure a relative quantity and mass is a absolute quantity.
2) Liquid pressure = weight density x depth
pressure depend on both density and depth. more the depth more the pressure similarly for density .
3) Air pressure at any height in the atmosphere is due to the force per unit area exerted by the weight of all of the air lying above that height. Consequently, atmospheric pressure decreases with increasing height above the ground.
