Mitochondria is the cell organelle the provides energy to function it also helps in respiration .It is called also as the power house of the cell
Answer/solution:
Given :
Mass =5kg
T 1 =20 C,T 2 =100 ∘C
ΔT=100−20=80 ∘C
Q=m×C×ΔT
where C= specific heat capacity of water
=4200J/(kgK)
Q=5×4200×80
=1680000 Joule.
=1680KJ
Answer:
The eyepiece comprises a converging lens that is a magnifying lens. The lens has a short focal length,
This lens magnifies this image.
Explanation:
In lenses such as those in microscopes and telescopes, the objective forms an image with the following features:
1. Image is real
2. Image is diminished in size
3. Also, the image formed is upside-down.
The eyepiece comprises a converging lens that is a magnifying lens. The lens has a short focal length,
This lens magnifies this image.
Answer: False
Explanation:
Relative to the concept of radiations, a black body is an object capable of absorbing any form of electromagnetic radiation irrespective of its frequency or angle of incidence when incident on such object.
However, the same cannot be said about real bodies as real bodies are those which reflect all rays incident on them completely and uniformly in all directions.
One very important characteristic of black bodies is that they are ideal emmiters.
The concept of emmisivity is brought about by the existence of real bodies .
This is due to the fact that they are only able to emit radiation at a fraction of the black body energy levels.
Please note that by convention, the emmisivity of a real body is always less thaan 1.
As such they are not able to emit as much radiation as a black body at the same temperature.