A refrigerator has a coefficient of performance equal to 4.2. How much work must be done on the refrigerator in order to remove 250 J of heat from the interior? (a) How much work is done on the gas in each cycle? [work] (b) How much heat is exhausted into the hot reservoir in each cycle? [heat]

When an ideal gas increases in volume at constant pressure, the average kinetic energy of the gas molecules

A heat engine performs the reversible cycle abca with 9.0 moles of an ideal gas, as shown in the figure. Path ca is an adiabatic process. The temperatures at points a and b are 300 K and 500 K, respectively. The volume at point c is 0.20 m3. The adiabatic constant of the gas is 1.60. What is the thermal efficiency of this engine?      η=[eta]

A commercial with exposition, conflict, rising suspense, climax, and resolution with product identification is also known as a

In 3GPP 5G systems, frequency range 1 (FR1) covers frequencies above 10 GHz. 

Which of the following might be intended to reduce the cell size?

Which of the following is a cause for frequency selectivity?

Cell sectorization increases the capacity of a cellular system, while cell splitting reduces the capacity. 

 In a cellular network with smaller cells more hand-offs are experienced compared to large cells. 

A disadvantage of marketing public relations is that