Exam 1: Introduction and Basic Concepts

The density and the specific volume of a simple compressible system are known. The number of additional intensive, independent properties needed to fix the state of this system is

The atmospheric pressures at the top and the bottom of a mountain are read by a barometer to be 93.8 and 100.5 kPa. If the average density of air is 1.25 kg/m³, the height of the mountain is

The pressure drop in a duct is to be measured by a differential oil manometer. If the differential height between the two fluid columns is 3.2 cm and the density of oil is 860 kg/m³, the pressure drop in the duct is

Consider a submarine cruising 30 m below the free surface of seawater whose density is 1025 kg/m³. The increase in the pressure exerted on the submarine when it dives to a depth of 110 m below the free surface is

A pressure gage connected to a tank reads 55 kPa at a location where the atmospheric pressure is 72.1 cmHg. The density of mercury is 13,600 kg/m³. The absolute pressure in the tank is

An orange loses 1.2 kJ of heat as it cools per °C drop in its temperature. The amount of heat loss from the orange per °F drop in its temperature is

The pressure of a gas in a well-sealed vertical frictionless piston-cylinder device is to be increased by adding a mass of 25 kg on the piston. If the diameter of the cylinder is 14 cm, the increase in the pressure of the gas is

During a cooling process, the temperature of an object drops by 20°C. This temperature drop is equivalent to a temperature drop of

Consider an 85-m deep lake. The pressure difference between the top and bottom of the lake is

The average body temperature of a person rises by 4°C during a sickness. The rise in the body temperature in Rankine is