Athick plate made of stainless steel is initially at a uniform temperature of 300 c. the surface is suddenly exposed to a coolant at 20 c with a convective surface coefficient of 110 w/m2⋅k. evaluate the temperature after 3 min of elapsed time
(a) at the surface
(b) a depth of 50 mm
work this problem both analytically and numerically.

What is the difference between electrically neutral objects and electrically charged objects

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value