Bartchell
Baba   Bendorf, Rheinland-Pfalz, Germany
 
 
looking for small men for a big guy
Favorite Game
563
Hours played
62
Achievements
Recent Activity
292 hrs on record
last played on 18 Dec
14.2 hrs on record
last played on 17 Dec
100 hrs on record
last played on 14 Dec
Comments
gRUb 4 Apr, 2022 @ 4:51am 
+rep
Stefan-Boltzmann Equation
P = T^4
P = power in watts
T = the temperature of the object in kelvin
T = K^2
The surface temperature of particular object increases from 500K to 2000K. What effect does this have on the rate of transmission of thermal energy from the object
2000/500 = 4 = T
4^4 = 256 = P

The Stefan-Boltzmann relationship can be expressed by considering other variables in the rate of transfer of radiant energy
P = eoA T^4
P = power in watts
A = surface area in m^2
T = the temperature of the object in kelvin
O = the universal constant 5.67 * 10^-8 W m ^-2 K ^ -4
A black plastic water tank (e = .95) holds 1000 L of water at 90 C. The tank is a cube of 1 m length on each side. Estimate the rate of heat loss from the tank, assuming the surrounding environment is at 20 C
90 C = 363 K 20 C = 293
6 * 1 * 1 = 6m^2 SA for a cube
P = .95 * 5.67 * 10^-8 * 6 * (363^4 – 293^4) = 3230 W
it 15 Mar, 2022 @ 11:17pm 
:
large stone slab 17 Dec, 2018 @ 5:53pm 
penie