Large stainless steel 304 plate initially at 200 C is cooled by air jet at Tair=20 C (both sides). Air velocity is V=50 m/s. The plate dimensions are 1.5 m x 1.0 m x 0.1 m (the plate thickness is 2L1=0.1 m. a) Determine the average heat transfer coefficient, hL b) h(x) at the end of the plate, x=L. c) Calculate temperature at the center of the plate (under the jet) after 3 minutes (180 s) . d) Determine the temperature at the surface of the plate (under the jet) 3 seconds of cooling. Can you assume the heat transfer coefficient is infinite ?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to. in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?