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Which of the following reactions does not lead to the formation of an ester?

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A woman of mass 50 kg skis down a slope inclined at 45 degrees with respect to the horizontal. If the coefficient of kinetic friction between her skis and the snow is 0.2, what is the net force acting on the skier?
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A transformation takes a thermodynamic system from state A to state B, exchanging with the surrounding heat Q_1 = 250 kJ and work L_1 = 100 kJ. Another transformation brings the same system between the same initial and final states with heat exchange Q_2 = 100 kJ. What is the value of the work exchanged in the second transformation?
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A cyclist accelerates from rest to a final velocity of 20 m/s over a distance of 200 m with uniform acceleration. After reaching this final velocity, the cyclist maintains a constant speed for the next 100 m. The total time taken by the cyclist to cover the distance of 300 m3 is
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A parallel plate capacitor is made of two plates separated by a distance of 1 mm. The capacitor is connected to a battery that maintains a constant potential difference of 12 V across the plates. The space between the plates is filled with air, and the dielectric constant of air is approximately 1. Determine the force on a charge of 2×10−6 C placed between the plates.
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