Sty 8 Tor F The density of ice is the same as that of liquid

Sty 8. (Tor F) The density of ice is the same as that of liquid water at the same temperature. 9. Derive the relationship between specific weight and density using Newton\'s 2d La (F- 10. All of the following are true except a) The density of water is greatest at 4 b) Specific weight can be found by multiplying density and gravitational acceleration. c) The densities of objects on the moon are the same as they are on earth. d) The specific weights of objects on the moon are the same as they are on earth 11. Dividing the specific weight by the mass density of a liquid yields a) the specific gravity of the liquid b) the weight of the liquid. c) the gravitational acceleration d) none of the above. 12. Define absolute viscosity 13. (T or F) Newtonian fluids were consumed in great quantities by Sir Isaac Newtonian. 14. Kinematic viscosity a) is the proportionality constant relating shearing stress to the rate of angular deformation. b) is expressed in units of stress times the time interval (Nsec m). c) is found by dividing the absolute viscosity by the mass density at the same temperature d) is not related to the density of a fluid 15. Shear stresses in water are related to all of the following except a) The surface tension of the water b) The velocity difference hetween adjacent layers c) The distance between adjacent layers d) The temperature of the water.

Solution

1)

False. The density of ice and water differ at the same temperature. For example, the density of ice is 0.916 g/cm³ at 0 °C, whereas water has a density of 0.99 g/cm³ at the same temperature.

2)

Density = Mass/ Volume

Using newtons law, F = ma

can be written as W = M x g ==> = W/g

==> Density = W/(g x V)   but ( W/ V = sp. wt)

==> Sp. wt = Density x g

3)

d) is false

The specific weights of objects on moon and earth vary due to o change in gravitational pull.

4)

Sp. wt = Density x g

==> Density / sp wt = g ( Gravitational constant)

5)

Absolute viscosity is also known as dynamic viscosity. It can be defined as the measurement of the fluid\'s internal resistance to flow when the liquid is in the state of motion.

6)

TRUE>>!!!!

If in this case, the Newtonian fluid means water.

But false, if the statement means the origins of the name Newtonian fluids.

7) C)

kinematic viscosity id the ratio of absolute viscosity to the mass density.

8) A)

Shear stress doesn\'t depend on the surface tension