A meteoroid is moving towards a planet. It has mass m = 0.82×109 kg and speed v1 = 5.6×107 m/s at distance R1 = 1.1×107 m from the center of the planet. The radius of the planet is R = 0.78×107 m. The mass of the planet is M = 5.2×1025 kg. There is no air around the planet. show answer Correct Answer 14% Part (a) Enter an expression for the gravitational potential energy PE1 of the meteoroid at R1 in terms of defined quantities and the gravitational constant G. Assume the potential energy is zero at infinity. PE1 = ( - G M m )/R1 ✔ Correct!show answer Correct Answer 14% Part (b) Calculate the value of PE1, in joules. PE1 = - 2.587 * 10( 17 )PE1 = -2.587E+17 ✔ Correct!show answer No Attempt 14% Part (c) Enter an expression for the total energy E1 of the meteoroid at R1 in terms of defined quantities.

Abird sitting high in a tree is an example of what type of wnergy

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

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?