Answer:

Explanation:
As we know that base of the slab is given as


now we know that rate of heat transfer is given as

here we know that

Also we have



Answer:
The vacuum of space
Heat management problems
The difficulty of re-entry
Orbital mechanics
Micrometeorites and space debris
Cosmic and solar radiation
The logistics of having restroom facilities in a weightless
Explanation:
Explanation:
Mg-2+C+4>Mg2C.
Here you divide the four by the two and transfer the two toMg. In reactions like this oxidation numbers are exchanged.
Answer:
a) 
b) 
c) The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.
Explanation:
Given:
- temperature of the inner surface of the wall,

- temperature of the outer surface of the wall,

- temperature of the air outside,

- temperature of the air inside,

- coefficient of heat convection on outside,

- coefficient of heat convection on inside,

a)
The heat flux between the interior air and the wall:
The convective heat transfer rate is given as,




b)
The heat flux between the exterior air and the wall:



c)
The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.
Answer:
1. The number of turns on the secondary output is 18
2. The root mean square power delivered to the transformer is 48 Watts.
Explanation:
A transformer is an electronic device that can be used for increasing or decreasing the value of a given voltage. It consists of primary coils and secondary coil of a definte number of turns. When voltage flows in the primary coil, it induces voltage in the secondary coil. The two types are: step-up and step down transformers.
1. For a given transformer,
= 
where
is the value of the induced voltage in the secondary coil,
is he voltage in the primary coil, and
is the number of turns of the secondary coil,
is the number of turns in the primary coil.
From the question,
= 9.0 V,
= 120 V,
= 240,
= ?
So that,
= 
= 
= 18
The number of turns on the secondary output is 18.
2.
=
× 
= 0.4 × 120
= 48 W
The rms power delivered to the transformer is 48 Watts.