Bob is studying waves in science and learns that the energy of a wave is directly proportional to the square of the waves
amplitude. If the amplitude of a wave changes from 2m to 1m, what should he predict as the effect on energy of the wave?
A. The energy is halved.
B. The energy is doubled.
C. The energy is quartered
D. The energy is quadrupled.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

2b2t

explanation:

2b2t