Chapter 7 - Pressure

Question 1

Pressure =

Answer 1

Force/Area

Question 2

I.S Unit for Pressure

Answer 2

Pa/ (N/m^2)

Question 3

The smaller the area, the _______ the pressure

Answer 3

Larger

Question 4

Value of Atmospheric Pressure

Answer 4

1.0 x 10^5 Pa / 76cmHg

Question 5

Characteristics of liquid pressure

Answer 5

Pressure in liquid acts in all direction
Pressure at same depth is the same
Pressure of liquid is depends on Depth

Question 6

Pressure of a liquid =

Answer 6

Density of Liquid x Acceleration due to Gravity x Depth (height)

Question 7

Which two properties of liquid does the hydraulic system made use of?

Answer 7

Liquid is incompressible

If pressure is applied to a TRAPPED liquid, SAME pressure is transmitted to all parts of the liquid

Question 8

What instrument is used to measure Atmospheric Pressure

Answer 8

Barometer

Question 9

Mercury in Barometer

Atmospheric Pressure =

Answer 9

Density of Mercury x Acceleration due to Gravity x Height

? cmHg

Question 10

Why Mercury is chosen to used in barometer?

Answer 10

Mercury has high density and do not wet glass

Question 11

Will the shape of the tube, its diameter, or the angle of tilt affects height of the Mercury column in barometer?

Answer 11

No.

Question 12

Instrument used to measure GAS pressure

Answer 12

Manometer

Question 13

Define Pressure

Answer 13

The force acting per unit area