Answer:
The correct answer is option 'c':Convection.
Explanation:
When we ignite a campfire the heat produced by combustion heats the air above the fire. As we know that if a gases gains heat it expands thus it's density decreases and hence it rises, if we hold our hands directly above the fire this rising hot air comes in contact with our hands thus warming them.
The situation is different if we are at some distance from the campfire laterally. Since the rising air cannot move laterally the only means the heat of the fire reaches our body is radiation.
But in the given situation the correct answer is convection.
Answer: D
Explanation: When you change your transmission fluid you change your filter. When you do that you clean where the filter was. Then you can put the new filter on and the new fluid.
Answer:
See the attached file for the design.
Explanation:
Find attached for the explanation.
Answer:
vacancy formation energy of Ni is 1.400 eV
Explanation:
given data
number of vacancies in Ni = 4.7 x 
atomic weight = 58.69 g/mol
density = 8.8 g/cm³
solution
we get here N that is
N = 
...........1
N = 
N = 
and here no of vacancy will be
Nv = 
.................2
put here value
take ln both side
Qv = 1.400 eV
so vacancy formation energy of Ni is 1.400 eV
