Practice every past-year question.

1. A
   $\sqrt{\dfrac{GM}{R}}$
2. B
   $2\sqrt{\dfrac{GM}{R}}$
3. C
   $\sqrt{\dfrac{2GM}{R}}$
4. D
   $\sqrt{\dfrac{GM}{2R}}$

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1. A
   $s$-block
2. B
   $p$-block
3. C
   $d$-block
4. D
   $f$-block

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1. A
   $10\ J$
2. B
   $10000\ J$
3. C
   $0.1\ J$
4. D
   $1000\ J$

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1. A
   2.42
2. B
   1.54
3. C
   1.36
4. D
   1.50

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1. A
   50 cm
2. B
   75 cm
3. C
   25 cm
4. D
   22 cm

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