Question

1) A carnot's engine absorbs 2000J of heat from the sorce of a heat engine at 227 0 C and rejects 1200J of heat during each cylce to the sink. Calculate (a) Efficiency of the engine (b) Temperature of the sink. rn 2) What is the effect of pressure and temperature on velocity of sound in air? rn 3) Drwa a graph of eq n Fs =-kx,where Fs is the spring force and x is the displacement of block from equilibrium postion . Using the graph find an expression for the P.E of an elastic stretched spring. rn 4) Find the centre of mass of 3 particles at the vertices of an equilateral triangle. The masses of the particles are 100g, 150g, and 200g respectively. Each side of the equialteral triangle is 0.5m long. pls rpli soon

Answer 1

efficiency is 40% o.4 and sin tem 413 c