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Physics
Pressure
Over what area should a force of $100\,N$ act to produce a pressure of $500\,pascal?$
Physics
Pressure
Briefly explain why the tyres of tractors are large and wide?
Physics
Pressure
A sealed tank containing a liquid of density $\rho $ moves with horizontal acceleration $a$ as shown in the figure. The difference in pressure between two points $A$ and $B$ will be

$(A)h\rho g$
$(B)l\rho g$
$(C)h\rho g - l\rho a$
$(D)h\rho g + l\rho a$
Physics
Pressure
Explain why school bags are provided with wide straps to carry them.
Physics
Pressure
A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is
A. Same everywhere
B. Lower in the front side
C. Lower in the rear side
D. Lower in the upper side
Physics
Pressure
A barometer reads $76 cm$ of mercury. If the tube is gradually inclined at an angle of $ 60^\circ $ with vertical, keeping the open end immersed in the reservoir, the length of the mercury column will be
(A) 152 cm
(B) 72 cm
(C) 32 cm
(D) 38 cm
Physics
Pressure
what are the two parameters used to define pressure?
Physics
Pressure
The weight of a man is $750\,N$. The total area of the soles of his shoes is \[250{\text{ }}c{m^2}\]. Find the pressure he applies on the floor
A. 30000 Pa
B. 150 Pa
C. 300 Pa
D. $3 \times {10^6}Pa$
Physics
Pressure
The figure shows a model of perfume atomizer. When the bulb A is compressed, air flows through the narrow tube consequently pressure at the position of the vertical tube reduces. The liquid (perfume) rises in through the vertical tube and emerges through the end. If the excess pressure applied to the bulb in this process be $\Delta P$ then the minimum speed of air in the tube to lift the perfume is

A. $\sqrt {\dfrac{{2{\text{ }}(\Delta P{\text{ }} + {\text{ }}\rho gh)}}{{{\rho _a}}}} \:$
B. $\sqrt {\dfrac{{2{\text{ }}(\Delta P{\text{ }} - {\text{ }}\rho gh)}}{{{\rho _a}}}} \:$
C. $\sqrt {\dfrac{{\Delta P{\text{ }} + {\text{ }}\rho gh}}{{{\rho _a}}}} \:$
D. None of these
Physics
Pressure
Define force and pressure. What do you do to get maximum pressure with a minimum force? Name at least one appliance based on this principle.
Physics
Pressure
The pressure measured by a gauge is.

Physics
Pressure
What is the pressure exerted by the woman weighing \[500N\] standing on one heel of area of $1c{m^2}$ ?
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