Two balls of masses ‘m’ each are raised to height ‘h’ and ‘2h’ respectively. what will be the ratio of their potential energies

Protons and neutrons are found within the nucleus of an atom

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

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.