If you throw a 0.25-kg ball with a force of 20n what's the acceleration of the ball

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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