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Question Number 26013 by tawa tawa last updated on 17/Dec/17 Answered by mrW1 last updated on 17/Dec/17 $${F}_{{C}} +{F}_{{A}} \mathrm{sin}\:\mathrm{15}°={F}_{{B}} \mathrm{sin}\:\mathrm{75}° \\ $$$$\Rightarrow{F}_{{C}} ={F}_{{B}} \mathrm{sin}\:\mathrm{75}°−{F}_{{A}}…
Question Number 26009 by tawa tawa last updated on 17/Dec/17 Answered by mrW1 last updated on 17/Dec/17 $${ma}={F}−\mu{mg} \\ $$$$\Rightarrow\mu=\frac{{F}−{ma}}{{mg}}=\frac{\mathrm{10}−\mathrm{5}×\mathrm{0}.\mathrm{1}}{\mathrm{5}×\mathrm{10}}=\mathrm{0}.\mathrm{19} \\ $$ Commented by tawa…
Question Number 25998 by Vandana Narendra last updated on 17/Dec/17 Commented by prakash jain last updated on 17/Dec/17 $$ \\ $$$$\overset{\mathrm{10}{m}} {{A\_\_\_\_\_\_\_\_\_}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\mid \\…
Question Number 25973 by soyebshaikh41@gmail.com last updated on 17/Dec/17 $$\frac{\mathrm{k}.\mathrm{2}^{\mathrm{k}} +\mathrm{2}.\mathrm{2}^{\mathrm{k}} +\mathrm{2k}+\mathrm{4}}{\mathrm{2}}=\left(\mathrm{k}+\mathrm{3}\right)\mathrm{2}^{\mathrm{k}} \\ $$ Answered by prakash jain last updated on 17/Dec/17 $${k}\mathrm{2}^{{k}} +\mathrm{2}\centerdot\mathrm{2}^{{k}} +\mathrm{2}{k}+\mathrm{4}=\mathrm{2}\left({k}+\mathrm{3}\right)\mathrm{2}^{{k}}…
Question Number 25974 by Mr eaay last updated on 17/Dec/17 $${A}\:{cowbell}\:{coffee}\:{at}\:\mathrm{85}°{C}\:{is}\:{placed}\:{in}\:{a} \\ $$$${freezer}\:{at}\:\mathrm{0}°{C}.{The}\:{temperature}\:{of}\:{the} \\ $$$${coffee}\:{decreases}\:{exponentially};{so}\:{that} \\ $$$${after}\:\mathrm{5}\:{minutes}\:{it}\:{is}\:\mathrm{30}°{C}. \\ $$$$\left.{i}.\right){What}\:{is}\:{the}\:{temperature}\:{after}\:\mathrm{3}{minute}? \\ $$$$\left.{ii}\right){how}\:{long}\:{will}\:{it}\:{take}\:{for}\:{the}\:{temperature} \\ $$$${to}\:{drop}\:{to}\:\mathrm{5}°{C}? \\ $$…
Question Number 25969 by soyebshaikh41@gmail.com last updated on 17/Dec/17 $$\mathrm{C}_{\mathrm{0}} +\mathrm{2C}_{\mathrm{1}} +\mathrm{3C}_{\mathrm{2}} +……….+\left(\mathrm{n}+\mathrm{1}\right)\mathrm{C}_{\mathrm{n}} =\left(\mathrm{n}+\mathrm{2}\right)\mathrm{2}^{\mathrm{n}−\mathrm{1}} \\ $$$$\mathrm{using}\:\:\mathrm{Bionomial}\:\mathrm{teorm} \\ $$ Commented by moxhix last updated on 17/Dec/17…
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Question Number 25943 by tawa tawa last updated on 16/Dec/17 Answered by ajfour last updated on 16/Dec/17 $${friction}\:{f}\:=\mu{N}\:=\mu{m}_{{P}} \:{g} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:=\mathrm{0}.\mathrm{5}×\mathrm{10}×\mathrm{10}=\mathrm{50}\:{newtons} \\ $$$${m}_{{Q}} {g}−{T}={m}_{{Q}} {a}\:\:\:\:\:\:\:\:…\left({i}\right)…