What is quanta (keep it very simple)

How air particles exert a pressure on the inside of the balloon

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

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?