Physics, 28.09.2019 18:30 2002kaitlynmull
He total lifetime of the sun is close to 10 billion years. estimate the lifetime of a star three times as massive as the sun, and explain why it is likely or unlikely for complex, multi-cellular life to be able to evolve on a planet in the habitable zone around that star.
Answers: 1
Physics, 21.06.2019 15:30
Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?
Answers: 1
Physics, 22.06.2019 21:40
Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
Answers: 1
Physics, 23.06.2019 06:00
What would be the net charge of 1 gram gold piece after removal of 1% of its electrons
Answers: 3
He total lifetime of the sun is close to 10 billion years. estimate the lifetime of a star three tim...
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