Asteel tube (k 15 w/m.°c), with an outside diameter of 7.6 cm and a thickness of 1.3 cm is covered with an insulation material (k-0.2 w/m.°c) 2 cm thick. a hot gas at 330°c with a heat transfer coefficient of 400 w/m2.c flows inside the tube. if the outer surface of the insulation is exposed to cooler air at 30°c with a heat transfer coefficient of 60 w/m2.°c, determine: i) the heat loss from the tube to the air for a 10 m length of tube. il) the outer surface temperature of the insulation material.

Which bonds are found inside a water molecule

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

The energy equivalent of the rest mass of an electron is