A machine has an efficiency of 70%. How much work does the machine do when 20,000 J of work is done on it? 14,000 J
28,600 J
1,400,000 J
2,860,000 J

where is the diagram?

if you insert the diagram ill be able to you

b. the carbon cycle ensures living things have a source of hydrogen

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: