The distribution of galaxies in the universe is not regular, but clumpy. galaxies, some of them one billion light years from the sun, tend to clump together into huge supercluster formations. this is an image of the perseus-pisces supercluster. some galaxies are visible with the naked eye, but astronomers discovered these distant galaxies with the of a) space probes. b) satellite imaging. c) manned space craft. d) x-ray and infrared telescopes.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

Name two kinds of practical electric pumps.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)