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Question Number 78342 by mhmd last updated on 16/Jan/20 $${sppose}\:{that}\:\left({R},+,.\right){be}\:{aring}\:{and}\:{we}\:{have}\:{the}\:{ring}\:\left({R}×{Z},+^{'\:} ,.^{'} \right)\:{prove}\:{that}\:\left({R}×\mathrm{0},+^{'} ,.'\right)\:{it}\:{was}\:{ideal}\:{in}\:\left({R}×{Z},+^{'} ,.^{'} \right) \\ $$$${and}\:{prove}\:\left(\mathrm{0}×{Z},+,.\right){be}\:{isomorphic}\:{in}\:\left({Z},+,.\right) \\ $$$${and}\:{if}\:{a}\in{R}\:{identity}\:{element}\:\left({a}^{\mathrm{2}} ={a}\right){prove}\:{that}\:\left(−{a},\mathrm{1}\right){be}\:{identity}\:{element}\:{in}\:{the}\:{ring}\:\left({R}×{Z},+^{'} ,.^{'} \right) \\ $$$${pleas}\:{sir}\:{help}\:{me}\:{am}\:{neding}\:{this}\:{pleas}? \\…
Question Number 12812 by tawa last updated on 01/May/17 Answered by sandy_suhendra last updated on 02/May/17 $$\left.\mathrm{1}\right)\:\mathrm{V}=\pi\mathrm{r}^{\mathrm{2}} \mathrm{t} \\ $$$$\:\:\:\:\:\mathrm{350}=\mathrm{3}.\mathrm{14}×\mathrm{r}^{\mathrm{2}} ×\mathrm{8}.\mathrm{5} \\ $$$$\:\:\:\:\:\mathrm{r}^{\mathrm{2}} =\mathrm{13}.\mathrm{11} \\…
Question Number 12801 by tawa last updated on 01/May/17 Answered by sandy_suhendra last updated on 01/May/17 $$\left.\mathrm{1}\right)\:\mathrm{molar}\:\mathrm{gas}\:=\:\frac{\mathrm{2}.\mathrm{8}}{\mathrm{22}.\mathrm{4}}\:=\:\mathrm{0}.\mathrm{125}\:\mathrm{mol} \\ $$$$\mathrm{molar}\:\mathrm{mass}\:\mathrm{of}\:\mathrm{gas}\:=\:\frac{\mathrm{8}}{\mathrm{0}.\mathrm{125}}\:=\:\mathrm{64}\:\mathrm{gram}/\mathrm{mol} \\ $$$$\mathrm{vapour}\:\mathrm{density}\:=\:\frac{\mathrm{molar}\:\mathrm{mass}\:\mathrm{of}\:\mathrm{gas}}{\mathrm{molar}\:\mathrm{mass}\:\mathrm{of}\:\mathrm{H}_{\mathrm{2}} }\:=\:\frac{\mathrm{64}}{\mathrm{2}}\:=\mathrm{32}\:\:\:\:\: \\ $$$$\left.\mathrm{2}\right)\:\mathrm{Mg}\:+\:\mathrm{2HCl}\:\rightarrow\:\mathrm{MgCl}_{\mathrm{2}} \:+\:\mathrm{H}_{\mathrm{2}}…
Question Number 78332 by Lontum Hans last updated on 16/Jan/20 $$\mathrm{Find}\:\mathrm{the}\:\mathrm{values}\:\mathrm{of}\:\mathrm{k}\:\mathrm{and}\:\mathrm{n}\:\mathrm{for}\:\mathrm{which}\:\mathrm{x}^{\mathrm{3}} \mathrm{and}\:\mathrm{higher}\:\mathrm{powers}\:\mathrm{of}\:\mathrm{x}\:\mathrm{are}\:\mathrm{negligeble} \\ $$$$\mathrm{given}\:\mathrm{that}\:\left(\mathrm{1}+\mathrm{kx}\right)^{\mathrm{n}} =\mathrm{1}+\mathrm{2x}+\mathrm{6x}^{\mathrm{2}} . \\ $$ Commented by mr W last updated on…
Question Number 78314 by mfwajoel1 last updated on 15/Jan/20 $${resolve} \\ $$$$\left\{_{{logx}_{{y}} ={logy}_{{x}} } ^{{x}^{{y}} ={y}^{{x}} } \right. \\ $$ Commented by john santu last…
Question Number 12773 by tawa last updated on 01/May/17 Answered by mrW1 last updated on 01/May/17 $${Q}\mathrm{7} \\ $$$$\Rightarrow{Answer}\:{C} \\ $$ Commented by mrW1 last…
Question Number 78256 by SmNayon11 last updated on 15/Jan/20 $$\mathrm{Evaluate}\:\Sigma\mathrm{a}_{\mathrm{1}} \mathrm{a}_{\mathrm{2}} \mathrm{a}_{\mathrm{3}} \: \\ $$$$\mathrm{as}\:\mathrm{a}\:\mathrm{function}\:\mathrm{of}\:\:\mathrm{a}_{\mathrm{i}} \: \\ $$$$ \\ $$$$ \\ $$ Terms of Service…
Question Number 12683 by tawa last updated on 29/Apr/17 $$\mathrm{A}\:\mathrm{coil}\:\mathrm{of}\:\mathrm{inductance}\:\mathrm{0}.\mathrm{12Hz}\:\mathrm{and}\:\mathrm{resistance}\:\mathrm{4}\:\Omega\:\mathrm{is}\:\mathrm{connected}\:\mathrm{across}\:\mathrm{a}\:\mathrm{240}\:\mathrm{v},\: \\ $$$$\mathrm{50}\:\mathrm{Hz}\:\mathrm{is}\:\mathrm{supplied}\:.\:\mathrm{Calculate}\:\mathrm{the}\:\mathrm{current}\:\mathrm{on}\:\mathrm{the}\:\mathrm{load}\:\left(\pi\:=\:\mathrm{3}.\mathrm{142}\right). \\ $$ Answered by ajfour last updated on 29/Apr/17 $${I}_{{rms}} =\frac{{E}_{{rms}} }{{Z}} \\…
Question Number 12672 by tawa last updated on 28/Apr/17 Answered by sandy_suhendra last updated on 28/Apr/17 Commented by sandy_suhendra last updated on 28/Apr/17 $$\Sigma\mathrm{F}_{\mathrm{y}} =\mathrm{0}…