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state the conditions under which two forces form a couple and give an example of couple
An atom which has lost one electron would be: (1) Negatively charged () Positively charged (3) Electrically neutral (4) Carry double positive charge Ans: Elec
Whenever there is a relative speed among a source of sound and the listener, the apparent frequency of sound listen by the listener is dissimilar from the real frequency of sound e
ELECTROMOTIVE FORCE – EMF: To make use of electricity by provision of an electric current, the potential different must be maintained. That is, the positive and negative charg
A ball with a mass of 25 grams is dropped from ledge 908 meters above the ground. What is its kinetic energy the instant before it hits the ground? What is the potential energy of
Two thin convex lenses of focal lengths 0.15m and 0.2m are separated by a distance of 0.6m. Determine the effective focal length of the combination.
What is force?
VELOCITY- TIME GRAPH: The graphs which represents the variation of velocity of an object with respect to time is known as velocity- time graph.
Q. W hat will be effect on Newton's rings if; (i) A little oil (µ = 1.65) is introduced between the lens (µ - 1.5) and the glass plate (µ = 1.75). (ii) A Pla
Van der Waals force (J.D. van der Waals): It is the forces which is responsible for the non-ideal behavior of gases, & lattice energy of molecular crystals. There are three ca
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