Heat a. Calculate the time required for an
electric water heater to raise
temperature of 10 litres of water
from 15°C to 65°C, if the heating
element takes a current of 10A from
a 240V supply and the efficiency of
the heating process is 80%. Take
specific heat capacity of water to be
4180J/Kg and 1kg of water as 1 litre.​

an electric circuit

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.