Question Number 16134 by Tinkutara last updated on 18/Jun/17 $$\mathrm{The}\:\mathrm{mathematical}\:\mathrm{expression}\:\mathrm{which} \\ $$$$\mathrm{is}\:\mathrm{true}\:\mathrm{for}\:\mathrm{the}\:\mathrm{uncertainty}\:\mathrm{principle}\:\mathrm{is} \\ $$$$\left(\mathrm{1}\right)\:\left(\Delta{x}\right)\:\left(\Delta{v}\right)\:\geqslant\:\frac{\mathrm{h}}{\mathrm{4}\pi} \\ $$$$\left(\mathrm{2}\right)\:\left(\Delta\mathrm{E}\right)\:\left(\Delta{x}\right)\:\geqslant\:\frac{\mathrm{h}}{\mathrm{4}\pi} \\ $$$$\left(\mathrm{3}\right)\:\left(\Delta\theta\right)\:\left(\Delta\phi\right)\:\geqslant\:\frac{\mathrm{h}}{\mathrm{4}\pi} \\ $$$$\left(\mathrm{4}\right)\:\left(\Delta{x}\right)\:\left(\Delta\mathrm{m}\right)\:\geqslant\:\frac{\mathrm{h}}{\mathrm{4}\pi} \\ $$ Terms of Service…
Question Number 81657 by zainal tanjung last updated on 14/Feb/20 $$\:\:\underset{\mathrm{0}} {\overset{\mathrm{3}} {\int}}\frac{\mathrm{x}+\mathrm{1}}{\left(\mathrm{x}^{\mathrm{2}} +\mathrm{2x}\right)^{\mathrm{15}} }=…. \\ $$ Commented by Tony Lin last updated on 14/Feb/20…
Question Number 147176 by Lewis junior last updated on 18/Jul/21 Answered by Olaf_Thorendsen last updated on 18/Jul/21 $$\left(\mathrm{1}\right) \\ $$$$\left(\mathrm{a}\right)\:\mathrm{Soit}\:{x}\in\mathbb{R}_{+} ^{\ast} . \\ $$$$ \\…
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Question Number 16081 by Tinkutara last updated on 17/Jun/17 $$\mathrm{A}\:\mathrm{spherical}\:\mathrm{balloon}\:\mathrm{of}\:\mathrm{21}\:\mathrm{cm}\:\mathrm{diameter} \\ $$$$\mathrm{is}\:\mathrm{to}\:\mathrm{be}\:\mathrm{filled}\:\mathrm{with}\:\mathrm{hydrogen}\:\mathrm{at}\:\mathrm{NTP} \\ $$$$\mathrm{from}\:\mathrm{a}\:\mathrm{cylinder}\:\mathrm{containing}\:\mathrm{the}\:\mathrm{gas}\:\mathrm{at} \\ $$$$\mathrm{20}\:\mathrm{atmosphere}\:\mathrm{at}\:\mathrm{27}°\mathrm{C}.\:\mathrm{If}\:\mathrm{the}\:\mathrm{cylinder} \\ $$$$\mathrm{can}\:\mathrm{hold}\:\mathrm{2}.\mathrm{82}\:\mathrm{litres}\:\mathrm{of}\:\mathrm{water},\:\mathrm{calculate} \\ $$$$\mathrm{the}\:\mathrm{number}\:\mathrm{of}\:\mathrm{balloons}\:\mathrm{that}\:\mathrm{can}\:\mathrm{be} \\ $$$$\mathrm{filled}\:\mathrm{up}. \\ $$ Answered…
Question Number 16079 by Tinkutara last updated on 17/Jun/17 $$\mathrm{An}\:\mathrm{open}\:\mathrm{flask}\:\mathrm{contains}\:\mathrm{air}\:\mathrm{at}\:\mathrm{27}°\mathrm{C}.\:\mathrm{To} \\ $$$$\mathrm{what}\:\mathrm{temperature}\:\mathrm{it}\:\mathrm{must}\:\mathrm{be}\:\mathrm{heated}\:\mathrm{to} \\ $$$$\mathrm{expel}\:\mathrm{one}-\mathrm{fourth}\:\mathrm{of}\:\mathrm{the}\:\mathrm{air}? \\ $$ Commented by ajfour last updated on 18/Jun/17 $${is}\:{it}\:\mathrm{127}°{C}\:? \\…
Question Number 16044 by Tinkutara last updated on 17/Jun/17 $$\mathrm{A}\:\mathrm{particle}\:\mathrm{is}\:\mathrm{projected}\:\mathrm{horizontally} \\ $$$$\mathrm{with}\:\mathrm{speed}\:{u}\:\mathrm{from}\:\mathrm{point}\:{A},\:\mathrm{which}\:\mathrm{is}\:\mathrm{10} \\ $$$$\mathrm{m}\:\mathrm{above}\:\mathrm{the}\:\mathrm{ground}.\:\mathrm{If}\:\mathrm{the}\:\mathrm{particle}\:\mathrm{hits} \\ $$$$\mathrm{the}\:\mathrm{inclined}\:\mathrm{plane}\:\mathrm{perpendicularly}\:\mathrm{at} \\ $$$$\mathrm{point}\:{B}.\:\left[{g}\:=\:\mathrm{10}\:\mathrm{m}/\mathrm{s}^{\mathrm{2}} \right] \\ $$$$\mathrm{Find}\:\mathrm{horizontal}\:\mathrm{speed}\:\mathrm{with}\:\mathrm{which}\:\mathrm{the} \\ $$$$\mathrm{particle}\:\mathrm{was}\:\mathrm{projected}. \\ $$…
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Question Number 81545 by TawaTawa last updated on 13/Feb/20 Commented by mathmax by abdo last updated on 14/Feb/20 $${i}\:{can}\:{t}\:{miss}\:{tawa}\:\:{because}\:{i}\:{have}\:{left}\:{physic}\:{for}\:{a}\:{long}\:{time}… \\ $$ Commented by mathmax by…