State the relationship between object distance, image distance,and focal length of a spherical mirror.
The relationship between object distance, image distance, and focal length of a spherical mirror is given by 1/f=1/v+1/u Where f=... View Article
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Magnification equals – (v/u) why minus sign is here?
Magnification equals -(v/u). The negative sign indicates the type of image formed. The image is inverted when there is a... View Article
Define linear magnification produced by a mirror
Linear magnification produced by a spherical mirror is the ratio of the size of the image formed by the mirror... View Article
At what distance from a concave mirror of focal length 10cm should an object 2cm long be placed in order to get an erect image 6cm tall?
Given Focal length of concave mirror (f) = -10 cm Height of the object (ho) = 2 cm Height of... View Article
When the carbon dioxide is increase it increase the earth tempeature. Explain
When the carbon dioxide is increasing it increases the earth temperature. The increase in carbon dioxide causes global warming. Global... View Article
Prove that (x^a/x^b) ^1/ab ( x^b /x^c) ^1/bc (x^c/x^a) ^1/ca= 1
Given: (xa/xb)^1/ab( xb /xc)^1/bc(xc/xa)1/ca We need to prove the gives equation is unity that si 1 LHS=(xa/xb)^1/ab( xb /xc)^1/bc(xc/xa)1/ca Using... View Article
Define Principal focus of a convex mirror
Answer: Convex Mirror is a curved mirror where the reflective surface bulges out towards the light source. This bulging out... View Article
Why is ice at 273 Kelvin more effective in cooling than water at the same temperature.
Ice is more effective than water at the same temperature. The reason behind this is cooling takes place at the... View Article
What is the working principle of an electric generator
The electric motor, generator, and transformers all work on the principle of electromagnetic induction. The electric motor converts electrical energy... View Article
Gasses completely fill the vessel in which they are kept. Give reasons
In gases the arrangement of atoms are irregular and the movement is continuous in a random motion. So a gas... View Article
Define sol
A sol is a heterogeneous mixture in which the suspension can be seen easily. A sol will not scatter a... View Article
Different between prokaryotic and eukaryotic cell
Prokaryotic Eukaryotic Organisms are always unicellular Organisms are always unicellular and multicellular Nucleus is absent Nucleus is present Cell division... View Article
Why does Mercury has a convex meniscus?
Why does Mercury have a convex meniscus? Solution Mercury has a convex meniscus because the cohesive forces in liquid mercury... View Article
Make the greatest and the smallest 4-digit number using any four different digits with the given conditions. (a) 4 is always in the thousands place. (b) 0 is always in the hundreds place. (c) 6 is always in the ones place.
Solution (a) 4 is always in the thousands place. Greatest: 4999 Smallest: 4000 (b) 0 is always in the hundreds... View Article
Explain why lead carbonate is does not react with dil. HCl
The lead carbonate is does not react with dil. HCl because the initial reaction causes the formation of a layer... View Article
A person with with defective eye cannot see closer objects clearly because the image is formed on
A person with with defective eye cannot see closer objects clearly because the image is formed beyond retina. This phenomenon... View Article
Starting from (-1) × 5 write various products showing some pattern to show (-1) × (-1) = 1
Answer: Starting from (-1) × 5 write various products showing some pattern to show (-1) × (-1) = 1 According... View Article
Write all possible two digit number that can be formed by using the 3, 7 and 9 if the repetition of the digit is allowed
Answer: We know that a two-digit number has two places. The ten’s position can be occupied in three different ways... View Article
How we can write 7452283 in International system .
Answer: In the Indian system, lakhs are written after thousands, whereas in the International system, millions are written after thousands. The... View Article
State the necessary condition for autotrophic nutrition and name the by-product. Mention the source of their by product.
Autotrophic nutrition takes place through the process of photosynthesis. Carbon dioxide, water, chlorophyll pigment, and sunlight are the necessary conditions... View Article
