An airplane flies 650 miles in 1 hour 15 minutes. what is its average speed in miles per hour?

20 miles per hour because it is just like a car but in the air.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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