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(i) Lead balls are spherical in shape.
(ii) Rain leaves and a globule of mercury placed on glass plate are spherical.
(iii) Hair of shaving painting brush, when goes in water spread out, but as soon as it is taken out. Its fur sticks together.
(iv) A greased needle saved gently on the free surface of water in a beaker does not sink.
(v) Likewise, insects may go on the free area of water without drowning.
(vi)Bits of computer gum go irregularly when engaged on water surface.
Q. The radioactive isotope 84Pa214 undergoes a successive disintegration of two α decays and two β decays. Find the atomic number and the mass number of the resulting isotope.
It makes sense that copper should be used because it could heat up faster, making the event more efficient.
A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the momentum of the car?
derivation by calculas method of Snth = (Sn – Sn -1) = u + a/2 (2n – 1)
Sliding versus Static Friction: Friction force is the force exert by a surface as an object moves crosswise it or makes an effort to move across it. Two types of friction force
Number of electrons in the outermost orbit of the element of atomic number 15 is: (1) 1 (2) 3 (3) 5 (4) 7 Ans: 5
The operation of a logic gate or circuit can be shown in a table which have all possible inputs and their corresponding output is known as the truth table. To write the truth table
What is a capacitor ? A capacitor is basically a two conductors conencted with an insulator.... It stores great amount of charge!
Helium gas with a volume of 2.60 L, under a pressure of 1.30atm and at a temperature of 41.0 degrees, is warmed until both pressure and volume are doubled. a)What is the final temp
what is tortional pendulum?
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