Physics-
General
Easy
Question
Two pulses in a stretched string whose centres are initially 8 cm apart are moving towards each other as shown in the figure. The speed of each pulse is 2 cm/s. After 2 seconds, the total energy of the pulses will be
- Zero
- Purely kinetic
- Purely potential
- Partly kinetic and partly potential
The correct answer is: Purely kinetic
After 2 sec the pulses will overlap completely. The string becomes straight and therefore does not have any potential energy and its entire energy must be kinetic
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and 
is 
Which of these statements are correct
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Physics-General
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Physics-General
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Chemistry-General
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Tautomerism is the phenomenon in which two structural isomers differing in the relative positions of their atoms are spontaneously interconvertable and can exist in dynamic equilibrium. The two forms in tautomeric equilibrium are called tautomers of each other. The interconvertibility of tautomers is a chemical reaction which involves making and braking of bonds. Tautomers are true isomers, and either of the individual tautomeric forms may be isolated
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Chemistry-General
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Physics-General
