Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli’s equation? Explain.

Does the focal length of a lens change if instead of blue light, monochromatic red light is used to measure it ?

Can Bernoulli’s equation be used to describe the flow of water through a rapid in a river? Explain.

A manometer reads the pressure of a gas in an enclosure as shown in Fig. 10.25 (a) When a pump removes some of the gas, the manometer reads as in Fig. 10.25 (b) The liquid used in the manometers is mercury and the atmospheric pressure is 76 cm of mercury. (a) Give the absolute and gauge pressure of the gas in the enclosure for cases with mercury)

Fill in the blanks using the word{s) from the list appended with each statement: For a' fluid in a steady flow, the increase in flow speed at a constriction follows (conservation of mass / Bernoulli’s principle)

Name two metals which are used for reduction in metallurgical process. Give one chemical equation for each.

Name two metals which are used for reduction in metallurgical process. Give one chemical equation for each.

State and explain Pascal's law of transmission of liquid pressure. Explain how this principle is applied in hydraulic lift.

During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa. At what height must the blood container be placed so that blood may just enter the vein? [Use the density of whole blood from Table 10.1]