Value of g or weight at a depth below the earth's surface

1. A.
   6400 km
2. B.
   800 km
3. C.
   1600 km
4. D.
   3200 km

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1. A.
   $\frac{Rn}{n-1}$
2. B.
   $\frac{R(n-2)}{n-1}$
3. C.
   $\frac{R(2n-1)}{n}$
4. D.
   $\frac{R(n-1)}{2n-1}$

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1. A.
   300 N
2. B.
   250 N
3. C.
   200 N
4. D.
   150 N

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1. A.
   $\frac{R(1-2n)}{n}$
2. B.
   $\frac{R(1-n)}{2n}$
3. C.
   $\frac{R(n-1)}{n}$
4. D.
   $\frac{R(2n-1)}{2n}$

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1. A.
   $g$
2. B.
   $3g$
3. C.
   $\frac{2g}{3}$
4. D.
   $\frac{g}{3}$

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1. A.
   $\frac{R(n - 1)}{n}$
2. B.
   $\frac{R(n + 1)}{n}$
3. C.
   $\frac{Rn}{(n - 1)}$
4. D.
   $\frac{R}{n}$

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1. A.
   $\frac{R(n - 1)}{n}$
2. B.
   $\frac{R(n + 1)}{n}$
3. C.
   $\frac{R(n - 1)^{2}}{n}$
4. D.
   $\frac{R(n + 1)^{2}}{n}$

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