(σx/2) + (1/2) × √(σx² + 4 τ²xy)

(σx/2) - (1/2) × √(σx² + 4 τ²xy)

(σx/2) + (1/2) × √(σx² - 4 τ²xy)

(1/2) × √(σx² + 4 τ²xy)

**The ultimate analysis of coal consists of the determination of the percentage of****According to Kelvin-Planck's statement, a perpetual motion of the __________ is impossible.****The process is adiabatic, if the value of n in the equation pvn = C, is****The entropy may be expressed as a function of****The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained…****In the below figure, curve D represents_________.****When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel,…****For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute…****The processes occuring in open system which permit the transfer of mass to and from the system, are…****Which of the following gas has the highest calorific value?****The standard value of atmospheric pressure taken at sea level is****When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce…****The point of contra flexure is a point where****The compression ratio for Diesel engines is****In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress…****For the same maximum pressure and temperature,****Strain energy is the****In S. I. units, the value of the universal gas constant is****In a free expansion process,****According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.****A column is said to be a short column, when****Carbonisation of coal consists of****When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from…****Which of the following materials is most elastic?****In the below figure, the stress corresponding to point D is****The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l…****Reversed Joule cycle is known as****The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends.****A fletched beam is used to****The amount of heat required to raise the temperature of __________ water through one degree is called…**