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# 1. The nucleus of a 125Xe atom is about 12fm in diameter (1fm = 10−15 m). Treat the nucleus as if it's a point

charge concentrated at its center. What is the acceleration of a proton 2.0fm from the surface of the nucleus? You may need to look up some properties of 125Xe.

2. The nucleus of a 23Na atom is about 7fm in diameter (1fm = 10−15 m). Treat the nucleus as if it's a point charge concentrated at its center. What is the acceleration of a proton 5.0fm from the surface of the nucleus? You may need to look up some properties of 23Na

3. The nucleus of a 68Zn atom is about 10fm in diameter (1fm = 10−15 m). Treat the nucleus as if it's a point charge concentrated at its center. What is the acceleration of a proton 13.0fm from the surface of the nucleus? You may need to look up some properties of 68Zn.

4. A D = 2mm diameter ball of 63Cu starts neutrally-charged and then is charged to Q = +50nC. What fraction of its electrons have been removed? The density of 63Cu is roughly ρ = 8900kg/m3.

5. A D = 10−1 m diameter ball of 197Au starts neutrally-charged and then is charged to Q = +1 µC. What fraction of its electrons have been removed? The density of 197Au is roughly ρ = 19g/cm3.

6. A D = 0.01mm diameter ball of 195Pt starts neutrally-charged and then is charged to Q = +500nC. What fraction of its electrons have been removed? The density of 195Pt is roughly ρ = 22g/cm3.

7. A small metal bead A has a charge of q = 25nC. It is touched to a possibly different metal bead B, initially neutral. When the two beads are then placed 5.0cm apart, the force between them is 5.4×10−4 N. What are the charges qA and qB on the beads assuming qB > qA?

8. A small metal bead A has a charge of q = 60nC. It is touched to a possibly different metal bead B, initially neutral. When the two beads are then placed 3×10−1 m apart, the force between them is 7×10−3 N. What are the charges qA and qB on the beads assuming qB < qA?

9. A small metal bead A has a charge of q = 5 µC. It is touched to a possibly different metal bead B, initially neutral. When the two beads are then placed 8×10−2 m apart, the force between them is 2×10−2 N. What are the charges qA and qB on the beads assuming qB > qA?

These are some practice questions we got but im not sure how to approach them, i would really appreciate help on answering these questions

1.acceleration=3.4610 28 m/s 2 2.accelaration=0.5510 28 m/s 2... View the full answer

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