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  1. The mechanical efficiency of any machine is always ____________________ than 100 percent.

  2. When a pole vaulter flexes the pole, the pole vaulter increases the pole’s ____________________ potential energy.

  3. Wind turbines convert ____________________ energy into electrical energy.

Verified Answer :

  1. less
    23. elastic
    24. wind
    hope it helps

Explanation :22  The mechanical efficiency of any machine is always less than 100 percent.

23. When a pole vaulter flexes the pole, the pole vaulter increases the pole’s elastic potential energy.

24.  Wind turbines convert wind energy into electrical energy.

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