Homework 14-Forces within fluids

The property of water to wet a solid surface when it comes in contact is known as

• Surface tension

• Viscosity

• Capilary action

• Vapor pressure

An ideal fluid is defined as the fluid which is

• Compressible

• Incompressible

• Compressible and viscous

• Incompressible and non-viscous

The most important properties which influences the fluid motion to a great extent is

• Density

• Specific weight

• Specific volume

• Viscosity

Surface tension is

• Line force

• Force per unit surface area

• For per unit volume

• All the above

The correct statement about the viscosity of gases

• changes with temperature but is practically unaffected by pressure

• practically unaffected by temperature but very much affected by pressure

• affected considerably temperature and pressure

• unaffected by temperature and pressure

The capillary rise in case of water-glass is due to

• More cohesive than adhesive forces

• More adhesive than cohesive forces

• More affinity of water for glass

• equal cohesive than adhesive forces

Boiling point is the one at which

• vapour pressure is less than atm. pressure

• vapour pressure is more than atm. pressure

• vapour pressure is equal to than atm. pressure

• There is no relation between vapour pressure and atm. pressure

Evaporation occurs when water changes into 

• transpiration
• snow
• solid
• vapor

When you spray a perfume on your palm, the liquid get evaporated after some time and you will feel cool. This is because evaporation give .....

• heating effect

• magnetic effect

• cooling effect

• warming effect

Change from gas to liquid...

• condensation
• evaporation
• expansion
• movement