Potential energy = (mass) x (gravity) x (height) .
To raise the 20kg block 6 meters, you need to give it
(20 kg) x (9.8 m/s²) x (6 m) = 1,176 joules
of potential energy.
Your machine takes 2,000 joules of energy to give the block
the 1,176 joules that it takes.
Your machine is only (1176 / 2000) = 58.8% efficient .
The other 'missing' 824 joules of energy doesn't just disappear.
It heats the machine, and the air around it. The final result is
that when you use that machine to lift blocks, you have to use
even MORE energy, to blow cool air on the machine and prevent
it from overheating and breaking.
DNA cannot leave the nucleus because that would risk it getting damaged.
It’s differing from ribose in having a hydrogen atom instead of an OH on one of the carbon atoms
The number is different than the number of chromosomes because us humans normally contain 23 pairs of chromosomes which is a total of 46 chromosomes in each cell. A change in the number of chromosomes can cause problems with growth, development, and function of the body systems.
