Q25) A room whose length is 10 m and its width is 8 m, using ceramic as its floor. The size of the
ceramic is 20 cm x 20 cm. The amount of ceramics on the floor in the room is_

2000 pieces

Explanation:

The number of tiles is given by dividing the area of room by the area of each tile. In this case,

thw areas are as shown below

Area of room is 8*10= 80 m2

Converting dimensions of tiles from cm to m then

Area of tiles is 0.2*0.2= 0.04 m2

No of tiles is 80/0.04=2000 tiles

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force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach