The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. If you are sitting in a space ship and another space ship explodes, you would hear nothing. So, in order for sound to travel, there has to be something with molecules for it to travel through. On Earth, sound travels to your ears by vibrating air molecules. In deep space, the large empty areas between stars and planets, there are no molecules to vibrate. There is no sound there.
Total current flow in circuit=0.75
Current flow through third resistor=0.75-(0.24+0.22)
=0.29
There are not enough electrons in atoms to affect the total mass, so the total mass is just the weight of the protons and neutrons.
