In atomic model, negative electrons orbit the positively charged nucleus.
a. dalton's
b. rutherford'sc. thomson's
d. democritus's

I think you are looking for B. That sounds very much like Rutherford's model of the atom.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

happy to

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0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student