Physics
It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because

Centre of gravity and centre of equilibrium fall within the feet
Centre of gravity falls within the body
Resultant weight of buckets is zero
Weights of buckets are balanced

ANSWER DOWNLOAD EXAMIANS APP

Physics
Superconductors are substances which

offer no resistance to the flow of electricity
conduct electricity at low temperature
conduct electricity at high temperatures
offer high resistance to the flow of current

ANSWER DOWNLOAD EXAMIANS APP