As a 5.00-kg sample of liquid mercury is cooled into a solid, it liberates 157kj of energy. what is the original temperature of the mercury? for mercury, the melting point is 234 k the heat of fusion is 11.3kj/kg and the specific heat is 140j/kg. k. 410 k
690 k
157 k
378 k

True or false graphs must include scales that increase by the same amount

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

What is the increase in density of a medium due to wave travel?