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An aquarium for larger water animals
A glass aquarium 50 cm by 25 cm is of useful size. Old accumulator cells are suitable, but the glass is not very obvious.
To prepare like an aquarium procure some fine silt from the bottom of a clear stream or pond and wash it carefully in running water. Cover the floor of the aquarium with it to a depth of about 2 cm. Plant a few reeds in this, weighting the roots with a stone or lead ring. Then put in a layer of coarse sand or gravel and some large stones to serve as hiding places for the water insects. Fill with a slow stream of water and permit to stand for a day or two unless clear. Clean water plants should be introduced.
Air dielectric capacitors are used mainly as laboratory standards of capacitance for measurement purposes. The insulating material used in these capacitances is fused silica and th
Explain the absorption and emission transitions of A and B coefficients of Einstein. Assume that N 1 and N 2 be the number of atoms per unit volume along with energy E 1 and
On the planet Newtonia, a simple pendulum having a bob with mass 1.25 kg and a length of 185.0 cm takes 1.42 seconds, when released from rest, to swing through an angle of 12.5 deg
conditions of equilibrium for concurrent force system
Explain interference of light? Write two essential conditions for sustained interference pattern to be produced on the screen. Illustrate a graph showing the variation of intens
what is electron
Automatic gas generator This is a semi-micro Kipps apparatus. The solid reagent (zinc, marble, iron sulphide, etc.) is placed in a large test tube with holes in it, and the aci
What is ground wave?
Given the following image, 1 2 1 1 2 0 0 1 5 1 0 1
what is the meaning of heat capacity
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