Angel has rubbed a balloon with wool to give it a charge of -1.0x10 C. He then
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acquires a plastic rod with a charge of 4.0x10 C. He holds the rod a distance of
50cm above the balloon. What is the force of attraction between the rod and the
balloon?

explanation:

i think option no d is the correct answer

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

1 is the answer to this problem