If the Universe started as a singularity, it would mean that started out . all mass and energy, spread out across the galaxy a portion of mass and all energy, in a point all mass but no energy, spread out across the galaxy all mass and energy, in a point

What is the scientific definition of energy that relates to work

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

In a good thermo flask the main cause of heat loss is