Water flows through a rectangular channel 1m side anf 0.5m deep anf the cipolleti weir of crest length 60 cm. If the water level in the channel is 22.5 cm above the weir calculate the discharge over the weir

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.