Suppose a motor connected to a 120 V source draws 20.0 A when it first starts. (a) What is its resistance (in â¦)?
(b) What current (in A) does it draw at its normal operating speed when it develops a 100 V back emf?

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

Why is the use of carbon-14 limited