Answer:
entire wall temperature difference = 29.29 K
Explanation:
given data
temperature difference steel ΔT = 17.79 K
steel L = 1.471 cm
lead L = 2.416 cm
to find out
temperature difference across wall
solution
we know that here heat transfer by steel and lead are same
and
heat transfer = k×A×ΔT / L ................1
so
H( lead) = H (steel)
k×A×ΔT / L = k×A×ΔT / L .................2
here we know
k for steel = 14.4 W/mK
k for lead = 36.6 W/mK
so put here all value in equation 2
k×ΔT / L = k×ΔT / L
36.6×ΔT / 2.416 = 14.4×17.79 / 1.471
ΔT = 11.50 K
so
entire wall temperature difference = 11.50 + 17.79
entire wall temperature difference = 29.29 K
We all know that a soccer ball is composed of matter, and matter is made up of particles of atoms such as protons and electrons, and matter of soccer ball can also be made up of waves of electrons and protons. This is now in a realm of quantum mechanics were everything defies our logic and common sense. Atoms can be defined as particle and also as a wave, they called it particle wave duality, it means atoms behave as wave and a particle. This is the trickiest part, Imagine that you are not observing the flight of the soccer ball, it actually behave as a wave as it moves in its trajectory, but at the moment that you are going to observe the flight of the soccer ball, it will behave as a particle as you see on its trajectory, becoming a ball or a particle, and that is the weird of part of quantum mechanics, the world of subatomic particles defies all common sense or logic. Remember that we will never see the wave like motion of any particle, because nature always plays a trick on our mind or senses.
Answer:
It is C and 100 percent sure about it
Answer:
Positive direction
Explanation:
We know that the direction of flow of current is always opposite the direction of the flow of electrons. Assuming that the electrons move in negative direction then the current will flow in the positive direction.
Answer:
metal B
temperature flow from high region to low . metal B has more temperature than others
