### Find the amount of time shell is in motion

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Q. The brick wall of a building has dimensions of by and is thick. How much heat ?ows through the wall a period when the average inside and outside temperatures are, in that order.

Q. A shell is fired from the ground with an initial speed of 1.58 x10^3 m/s at an initial angle of 51° to the horizontal.

(1) Neglecting air resistance, find the shell's horizontal range.

(2) Find the amount of time shell is in motion.

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