In which, among the following systems, does no heat or work cross its boundary?

A couple of two bodies produces which type of motion?

Up to which point in a stress-strain curve is Hooke's law applicable?

A solar collector receiving solar radiation at the rate of 0.6 kW/m2 transforms it into the internal energy of a fluid at an overall efficiency of 50%. The fluid heated to 350 K is used to run a heat engine which rejects heat at 313 K. If the heat engine is to deliver 2.5 kW power, the minimum area (in sq. meters) of the solar collector required would be:

In which type of welding is a mixture of Iron oxide and Aluminum used?

The forces which meet at one point but whose lines of action lie on different points are known as ______________.

What is the connecting rod?

A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

Along the neutral axis of a simply supported beam

The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is

According to principle of moments