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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.
The topic for the project is Newton's Law of Cooling, although you may choose a different title. The aim is to research how the temperature of a hot object is lost when it is kept
A diffraction grating used at normal incidence provides a spectral line of certain order with wavelength 6000A 0 superimpose on another spectral line of wave length 5000A 0 of th
Conductor: Conductors are those substances which permit electric current to passes easily by them. e.g. Metal, impure, water etc.
what is the energy value of a candle
The thrust developed to propel the jet ski shown in Fig is a result of water pumped through the vehicle and exiting as a high-speed water jet. For the conditions shown in the Fig,
Que: Completely un-polarized light of intensity Io is occurrence on a polarizer whose polarization direction makes an angle of 15.0 degrees amid respect to the vertical. What i
The process of changing of a heavy nucleus into two lighter nuclei of comparable masses (after bombardment with a energetic particle) with liberation of energy is known as nuclear
Two cars head out in the similar direction. Car A starts 1.0 min before car B. The position-time graphs for both cars are shown in the accompanying figure. a. How far apa
A virtual image can be formed by one or more of the following single mirrors? Identify them. a) Plane mirror b) Concave spherical mirror c) Convex spherical mirror
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