When is fluorescence strong?
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A man asks his friend to meet him at the airport at 3.00pm,to drive him to an appointment.he catches an earlier plane,and arrives at the airport at 2.00pm.he decides to start walking and is picked up en route by his friend.he arrives twenty minutes early for his appointment.how long did he walk?
Explain the Heat Vaporisation?
How fast can a shadow move ? If a moth fly's in front of a very bright room temperature light powerful enough to light up Saturn like the sun could it's shadow move faster then light if there was no light diffusion.
What is the difference between emf & current
Why is battery used in a motor car ?
What generates seismic waves?
Explain the Wet and Dry Hygrometer ?
What seven colors appear to be white when mixed together?
Why dies water rise in the trees ?
Why is the temperature of the body regulated by the skin ?
Is a sewing needle magnetic or non magnetic?
Explain the Friction and Equilibrium ?