If the air has a thermal energy of 4.5*10. , what is the air temperature ?

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The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.

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