Answer: T = -0.213°c
Heat flow = 38.2 w/m²
Explanation:
given data:
Wood = 0.031m thick
Styrofoam = 0.023m thick
Wood = k ( 0.080W/m.k)
Styrofoam = k (0.010W/m.k)
Temperature of wood = -15°c
Temperature of styrofoam = 19°c
(a) heat flow in wood and styrofoam must be equal
KAdT/ L = KAdT/ L
0.080 * A * ( T - ( -15) ) / 0.031 = 0.010 * A * ( T - ( 19°c) ) / 0.023
T = -0.213°c
(b) heat flow
H = KAdT / L
H = 0.080 * A * ( -0.213°c - ( -15°c) ) / 0.031
= 38.2 w/m²
A because energy can not be created or destroyed ONLY transformed from one from of energy to another
Answer:
both side charges will exert force on central charge towards left so the two forces add up. Thus resultant force on centre charge is
F = 9×10^9 x 8×10^-6×10×10^-6/16
+
9× 10^9 × 10×10^-6×12×10^-6/64
= 9× 10^9 × 10^ -12/16 (80+30)
=6.18 × 10^-2 N
or
= 0.06 N
Answer:
Mechanical energy is the ordered movement of the molecules as a single unit. Thermal energy is the random movement of the molecules. Mechanical energy can be 100% converted to thermal energy, but thermal energy cannot be fully converted to mechanical energy.
1.) core- the central region where nuclear reactions consume hydrogen to form helium
2.) radiative zone- the section of solar interior between the innermost core and the outer convective zone.
3.) convection zone- where light (photons) is created.
4.) photosphere- the visible surface of the sun that we are most familiar with
5.) chromosphere- second most outer layer of the sun. due to low density it is relatively transparent and only apparent during eclipses.
6.) corona- an aura of plasma that surrounds the sun and other stars but is usually hidden by the bright light of the sun’s surface.
