Question Number 51325 by peter frank last updated on 26/Dec/18 $${If}\:{a}\:{number}\:{of}\:{little}\: \\ $$$${droplets}\:{all}\:{of}\:{the}\:{same}\: \\ $$$${radius}\:{r}\:{coalesce}\:{to} \\ $$$${form}\:\:{a}\:{single} \\ $$$${drop}\:{of}\:{radius}\:{R}.{show} \\ $$$${that}\:{the}\:{rise}\:{in}\:{temperature} \\ $$$${is}\:{given}\:{by} \\ $$$$\frac{\mathrm{3}{T}}{{pJ}}\left(\frac{\mathrm{1}}{{r}}−\frac{\mathrm{1}}{{R}}\right)…
Question Number 182280 by BHOOPENDRA last updated on 06/Dec/22 Commented by BHOOPENDRA last updated on 06/Dec/22 Commented by BHOOPENDRA last updated on 07/Dec/22 $${can}\:{you}\:{please}\:{try}\:{Mr}.{W} \\…
Question Number 51107 by peter frank last updated on 24/Dec/18 $${A}\:{ball}\:{is}\:{bouncing}\:{down} \\ $$$${a}\:{flight}\:{of}\:{stairs}.{The}\: \\ $$$${coefficiate}\:{of}\:{restitution} \\ $$$${is}\:{e}.{The}\:{height}\:{of}\:{each}\:{step} \\ $$$${d}\:{and}\:{the}\:{ball}\:{descends} \\ $$$${one}\:{step}\:{at}\:{each}\:{bounce}. \\ $$$${After}\:{each}\:{bounce}\:{it}\:{rebounds} \\ $$$${to}\:{heigt}\:\:{h}\:{above}\:{the}\:{next}…
Question Number 50993 by peter frank last updated on 23/Dec/18 $${Prove}\:{newtons}\:{law}\:{of} \\ $$$${cooling}\:{by}\:{stefan}\:{law} \\ $$ Answered by tanmay.chaudhury50@gmail.com last updated on 23/Dec/18 Commented by tanmay.chaudhury50@gmail.com…
Question Number 50973 by Necxx last updated on 22/Dec/18 Answered by mr W last updated on 22/Dec/18 $${see}\:{Q}\mathrm{50913}. \\ $$$${t}_{\mathrm{1}} =\mathrm{2}{e}\sqrt{\frac{\mathrm{2}{h}}{{g}}}=\mathrm{2}\left(\frac{\mathrm{3}}{\mathrm{4}}\right)\sqrt{\frac{\mathrm{2}×\mathrm{20}}{\mathrm{10}}}=\mathrm{3}\:{seconds} \\ $$ Commented by…
Question Number 50967 by ajfour last updated on 22/Dec/18 Commented by ajfour last updated on 22/Dec/18 $${String}\:{is}\:{wrapped}\:{over}\:{cylinder}, \\ $$$${find}\:\boldsymbol{{l}}\:{for}\:{equilibrium}. \\ $$ Answered by ajfour last…
Question Number 50915 by peter frank last updated on 22/Dec/18 $${The}\:{range}\:{of}\:{riffle}\:{bullet} \\ $$$${is}\:\mathrm{1000}{m}\:{when}\:\theta\:{is}\:{the}\:{angle} \\ $$$${of}\:{projection}.{if}\:{the}\:{bullet} \\ $$$${is}\:{fired}\:\:{with}\:{the}\:{same}\: \\ $$$${angle}\:\:{from}\:{a}\:{car}\:{travelling} \\ $$$${at}\:\mathrm{36}{km}/{h}\:{towards}\:{the}\:{target} \\ $$$${show}\:{that}\:{the}\:{range}\:{will} \\ $$$${be}\:{increased}\:{by}…
Question Number 50914 by peter frank last updated on 22/Dec/18 $${prove}\:{that}\:{relative}\:{velocity} \\ $$$${is}\:{reversed}\:{by}\:{a}\:{head}\:{on} \\ $$$${collision} \\ $$ Answered by tanmay.chaudhury50@gmail.com last updated on 22/Dec/18 $${for}\:{collission}\:\:{velocity}\:{are}\:\overset{\rightarrow}…
Question Number 50913 by peter frank last updated on 22/Dec/18 $${A}\:{ball}\:{is}\:{dropped}\:{from} \\ $$$${height}\:{h}.{it}\:{strikes}\:{the}\:{ground} \\ $$$${and}\:{rises},{the}\:{coefficiate} \\ $$$${of}\:{restitution}\:{being}\:\:{e} \\ $$$${what}\:{is}\:{the}\:{total}\:{distance} \\ $$$${it}\:{moves}\:\:{and}\:\:{the}\:{time}\: \\ $$$${before}\:{it}\:{comes}\:{to}\:{rest}? \\ $$$$…
Question Number 50912 by peter frank last updated on 22/Dec/18 $${Show}\:{that}\:{in}\:{collision} \\ $$$${where}\:{kinetic}\:{energy}\:{is} \\ $$$${conserved}\:{linear}\:{momemtum} \\ $$$${is}\:{also}\:{conserved} \\ $$ Answered by tanmay.chaudhury50@gmail.com last updated on…