Question Number 193883 by byaw last updated on 22/Jun/23
$$ \\ $$If a 9000kg water flows in a minute through a pipe of cross sectional area 0.3m², what is the speed of water in the pipe?
Answered by Subhi last updated on 22/Jun/23
$${mass}\:{flow}\:{rate}=\frac{{m}}{{t}}=\frac{\mathrm{9000}}{\mathrm{60}}=\mathrm{150}\:{kg}/{s} \\ $$$$\frac{{m}}{{t}}\:=\:\rho{Av}\:=\:\mathrm{1000}×\mathrm{0}.\mathrm{3}{v}=\mathrm{300}{v}=\mathrm{150} \\ $$$${v}\:=\:\frac{\mathrm{150}}{\mathrm{300}}=\frac{\mathrm{1}}{\mathrm{2}}\:{m}/{s} \\ $$
Commented by York12 last updated on 22/Jun/23
$${sir}\:{how}\:{can}\:{I}\:{reach}\:{you}\:{out}\: \\ $$$$ \\ $$$$ \\ $$
Commented by byaw last updated on 22/Jun/23
$$\mathrm{please}\:\mathrm{how}\:\mathrm{did}\:\mathrm{you}\:\mathrm{get}\:\mathrm{the}\:\mathrm{1000}\:\mathrm{in}\:\mathrm{1000}×\mathrm{0}.\mathrm{3}{v}\:? \\ $$$$\rho{Av}\:\mathrm{stands}\:\mathrm{for}? \\ $$$${v}\:\mathrm{is}\:\mathrm{velocity}? \\ $$$${A}\:\mathrm{is}\:\mathrm{cross}−\mathrm{section}\:\mathrm{area}? \\ $$$$\rho\:\mathrm{is}\:\mathrm{pressure}? \\ $$
Commented by Subhi last updated on 22/Jun/23
$$\rho\:{is}\:{the}\:{denisity} \\ $$$$\frac{{m}}{{t}}=\frac{\rho{v}}{{t}}=\frac{{denisity}×{length}×{area}}{{time}}={denisity}×{area}×{velocity}=\rho{Av} \\ $$
Commented by Subhi last updated on 22/Jun/23
$${I}\:{think}\:{you}\:{have}\:{discord} \\ $$$${my}\:{user}\:{name}\:{is}\:{Ahmed}\:{subhi}\:{or}\:{Ahmed}\:{Subhi}#\mathrm{5797} \\ $$$${send}\:{me} \\ $$$$\:\cancel{\underline{\underbrace{\boldsymbol{\mathrm{N}}}}} \\ $$
Commented by byaw last updated on 23/Jun/23
$$ \\ $$A(-1, 2), B(3, 5) and C(4, 8) are the vertices of triangle ABC. Forces whose magnitudes are 5N and 3√10N act along (AB) ⃗ and (CB) ⃗ respectively. Find the direction of the resultant of the forces.
please help.