Consider a telescope with a small circular aperture of diameter 2.0 centimeters. a.) if two point sources of light are being imaged by this telescope, what is the maximum wavelength lambda at which the two can be resolved if their angular separation is 3.0 x 10^-5 radians? lambda = 490 nm. b.) in this applet, change the settings to match the situation in part a. notice how the diffraction pattern looks when the two sources are at the resolution limit (i. e., just resolved). now change the wavelength to 650 nanometers and the aperture diameter to 1.5 centimeters. use the applet to roughly determine at what angular separation the two points are just resolved. not sure how to get this one.

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

What is the equation for electrical work?

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic