Write any two activities which require more than a bucket of water.

Solution: Let the length of the shorter side be x metres. Thus the length of the longer side=(x+30) m Length of the diagonal=(x+60)m Each angle of a rectangle=90 degrees By Pythagoras Theorem, (diagonal)2=(shorter side)2+(longer side)2 (x+60)2 ...

The required velocity is √(gr)

It would make it more difficult for us to walk on a soapy floor because layer of soap makes floor smooth. The coating of soapy water reduces the friction and...

This statement is quite correct. Modern farming methods require chemical fertilisers, pesticides and modern farm equipments. All of these are manufactured in industry.

(i) Brushing your teeth (ii) Washing a handkerchief

(i) Bubbles of air came out from the bottle.  (ii) Some water entered the bottle. 

(c) mg is not greater than mv2/r Explanation : At the top position the weight of the water mg acts downward to bring it down while due to inertia water tries to escape upward...

(c) mg is not greater than mv2/r Explanation : At the top position the weight of the water mg acts downward to bring it down while due to inertia water tries to...

(a) Refraction is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one medium to...

(c) A = C + 3, D = B – 4, E = F – 6  C = E + 2, F = D + 3  On adding, we get A =...