Which sentence correctly states Boyle’s law?

A.
The pressure on a gas varies inversely with its volume at constant temperature.
B.
The pressure on a gas varies directly with its volume at constant temperature.
C.
The pressure on a gas varies directly with its temperature at constant volume.
D.
The pressure on a gas varies inversely with its temperature at constant volume.
E.
The volume of a gas varies directly with its temperature at constant pressure.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.