A body of mass m is taken from Earth's surface to a height equal to twice Earth's radius. Change in potential energy is MCQ with Answer and Explanation

Explanation:
Pressure is scalar (no direction), though force is vector. Reason: Pascal's law - fluid pressure transmits equally in all directions, confirming scalar nature. Memory aid: 'Pressure = force/area (scalar division); isotropic in fluids'. Assertion-reason testing fluid mechanics fundamentals, common in competitive exams.

Explanation:
Henry (H) = V·s/A = Ω·s.

Explanation:
Hydrogen bomb (thermonuclear weapon) uses uncontrolled nuclear fusion of hydrogen isotopes, triggered by a fission bomb. Releases enormous energy. Sun also uses fusion. Fission used in atomic bomb.