1. How will you recognize the magnet & magnetic material & non-magnetic material?
Ans: Drag one piece of material over another. There is no attractive force in the
middle portion of the magnet.
OR
Get a piece of thread and tie up with the one bar and check for poles. If it iron bar
then it moves freely and if it is magnetic bar then it fix in one direction according to
poles.
2. If one tyre of a car suddenly gets stolen…. and after sometime u find the tyre
without the screws how will u make ur journey complete?
Ans: Open 3 screws, 1 from each tyre and fix the tyre.
3. How can u measure a room height using a thermometer?
Ans: temp varies with height. but its dependent on various other factors like
humidity, wind etc.
4. What is the height of room if after entering the room with a watch ur head
strikes a hanging bulb?
Ans: Oscillate the hanging bulb. Calculate the time period for one complete
oscillation by Simple Harmonic Motion (SHM) of the handing bulb. Put it in the
formula T=2 * 3.14 * (L/G)^1/2
L will be the length of the hanging thread.
Add the L with ur height to get the height of the room.
OR
Ans: Drop it from the room and find the time at which it strikes the floor. Using
physics formula s = (at^2)/2 (IM NOT SURE ABOUT THIS ONE)
5. Color of bear…. if it falls from 1m height in 1s.
Ans: We get ‘g’ perfect 10 which is only in poles…hence polar bear…color White
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