Question

Two massless string of length 5 m hang from the ceiling very near to each other as shown in fig. Two

balls A and B of masses 0.25 kg and 0.5 kg are attached to the string. The ball A is released from rest

at a height 0.45 m as shown if the figure. The collision between two balls is completely elastic.

Immediately after the collision , the kinetic energy of ball B is 1 J. The velocity of ball A just after the

collision is​

Answer 1

On Earth, human activities are changing the natural greenhouse. Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.....!

uff ho gaya abb......!