Q4. What are the different ways in which human being use rocks ?

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.