Q1. Two pellets, each with charge 5 microcoulomb (1 microcoulomb = 0.000001 coulombs), are located 0.5 m apart. What is electrical force between the charges?

Q2. To keep a room at a comfortable 21.0 °C, Carnot heat pump does 325 J of work and supplies it with 2980 J of heat.

(a) How much heat is removed from the outside air by heat pump?

(b) What is the temperature of outside air?

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## Find the horizontal force essential to avoid relative motionIn brief explain the changes that the Sun will go through after it exhausts its core hydrogen. Be sure to describe both the changes occurring in the Sun's core and the changes visible from outside the Sun. What do we mean by the stages we call hydrog.. |

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