If a ship captain sounds a foghorn toward a huge object that in front of the ship and hears the echo 4.6 s later, how far away is the object ? (air temperature is 20 C) Think about this one . If you make a mistake, the ship could run into that huge object Someone help I really need help I hope someone answer

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luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

reserve is the answer