PLEASE HELP Which list gives key events regarding the exploration of space in the correct order, beginning with the earliest?(1 point) first humans on the moon, first lander on Mars, first space shuttle flight

first space shuttle flight, Hubble Space telescope launch, last humans on the moon

first humans in space, first space shuttle flights, first humans on the moon

first humans on the Moon, first humans on Mars, launching of the International Space Station

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

Atomic nuclei of almost all elements consist of