https://ejercicios-fyq.com/ Ejercicios Resueltos, Situaciones de aprendizaje y VÍDEOS de Física y Química para Secundaria y Bachillerato es SPIP - www.spip.net https://ejercicios-fyq.com/local/cache-vignettes/L144xH25/siteon0-da713.png?1758361862 https://ejercicios-fyq.com/ 25 144 https://ejercicios-fyq.com/Frequency-and-energy-of-light-4330 https://ejercicios-fyq.com/Frequency-and-energy-of-light-4330 2017-12-05T06:11:55Z text/html es F_y_Q Frequency Energy SOLVED <p>If frequency of red light is lower than frequency of blue light, how will their energies compare?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Frequency" rel="tag">Frequency</a>, <a href="https://ejercicios-fyq.com/Energy-671" rel="tag">Energy</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>If frequency of red light is lower than frequency of blue light, how will their energies compare?</p></div> <hr /> <div <div class='rss_ps'><p>The energy of blue light will be higher than the energy of red light. You must remember Planck's equation, which gives us the relationship between these two magnitudes: <br/> <br/> <img src='https://ejercicios-fyq.com/local/cache-TeX/715dd37cc8b71bff8a0e3d0e0bfddb1d.png' style="vertical-align:middle;" width="92" height="16" alt="\color[RGB]{2,112,20}{\bm{E= h\cdot \nu}}" title="\color[RGB]{2,112,20}{\bm{E= h\cdot \nu}}" /> <br/> <br/> <b>This equation establishes that the higher the frequency, the higher the energy</b>.</math></p></div> https://ejercicios-fyq.com/Waves-relation-between-frequency-and-wavelength-3677 https://ejercicios-fyq.com/Waves-relation-between-frequency-and-wavelength-3677 2016-08-23T08:44:14Z text/html es F_y_Q Propagation speed Wavelength SOLVED <p>An electromagnetic wave is travelling through a vacuum. If its frequency is 1 MHz, what will be its wavelength?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Propagation-speed" rel="tag">Propagation speed</a>, <a href="https://ejercicios-fyq.com/Wavelength" rel="tag">Wavelength</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>An electromagnetic wave is travelling through a vacuum. If its frequency is 1 MHz, what will be its wavelength?</p></div> <hr /> <div <div class='rss_ps'><p>The propagation speed of a wave is the product between of its frequency and wavelength. You can solve for the wavelength using the equation: <br/> <br/> <img src='https://ejercicios-fyq.com/local/cache-TeX/8e77d5ad636053e0a09966871bff61cd.png' style="vertical-align:middle;" width="189" height="43" alt="v = \lambda \cdot \nu\ \to\ \color[RGB]{2,112,20}{\bm{\lambda= \frac{v}{\nu}}}" title="v = \lambda \cdot \nu\ \to\ \color[RGB]{2,112,20}{\bm{\lambda= \frac{v}{\nu}}}" /> <br/> <br/> The speed of an electromagnetic wave in a vacuum is the speed of light in a vacuum: <br/> <br/> <p class="spip" style="text-align: center;"><img src='https://ejercicios-fyq.com/local/cache-TeX/b073e9156576cb6265a002b1f1427e7c.png' style="vertical-align:middle;" width="305" height="48" alt="\lambda= \frac{3\cdot 10^8\ m\cdot \cancel{s^{-1}}}{10^6\ \cancel{s^{-1}}} = \fbox{\color[RGB]{192,0,0}{\bm{3\cdot 10^2\ m}}}" title="\lambda= \frac{3\cdot 10^8\ m\cdot \cancel{s^{-1}}}{10^6\ \cancel{s^{-1}}} = \fbox{\color[RGB]{192,0,0}{\bm{3\cdot 10^2\ m}}}" /></p> </math></p></div> https://ejercicios-fyq.com/Sound-s-tone-3622 https://ejercicios-fyq.com/Sound-s-tone-3622 2016-06-30T05:38:35Z text/html es F_y_Q Frequency SOLVED <p>What is the physical magnitude of sound related to tone?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Frequency" rel="tag">Frequency</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>What is the physical magnitude of sound related to tone?</p></div> <hr /> <div <div class='rss_ps'><p>Tone is related to the <b>frequency</b> of the sound wave.</p></div> https://ejercicios-fyq.com/Waves-question-about-sound-3304 https://ejercicios-fyq.com/Waves-question-about-sound-3304 2015-08-26T08:40:46Z text/html es F_y_Q Mechanical wave SOLVED <p>Is sound able to travel through a vacuum?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Mechanical-wave" rel="tag">Mechanical wave</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>Is sound able to travel through a vacuum?</p></div> <hr /> <div <div class='rss_ps'><p><b>No, it is not able to travel through a vacuum</b>.</p> <p>Sound is a mechanical wave, which means it requires a material medium to propagate.</p></div> https://ejercicios-fyq.com/Relation-between-frequency-and-wavelength-3140 https://ejercicios-fyq.com/Relation-between-frequency-and-wavelength-3140 2015-05-08T09:14:21Z text/html es F_y_Q Propagation speed Frequency Wavelength SOLVED <p>A spring is producing waves with a frequency of 4 Hz and a wavelength 0.5 m. What is its velocity? What will be its wavelength if the frequency is doubled? What will be its wavelength if the frequency is reduced to half?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Propagation-speed" rel="tag">Propagation speed</a>, <a href="https://ejercicios-fyq.com/Frequency" rel="tag">Frequency</a>, <a href="https://ejercicios-fyq.com/Wavelength" rel="tag">Wavelength</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>A spring is producing waves with a frequency of 4 Hz and a wavelength 0.5 m. What is its velocity? What will be its wavelength if the frequency is doubled? What will be its wavelength if the frequency is reduced to half?</p></div> <hr /> <div <div class='rss_ps'><p>The wave's velocity is: <br/> <br/> <p class="spip" style="text-align: center;"><img src='https://ejercicios-fyq.com/local/cache-TeX/01c027dfa14d6b8ca71d2cd5e077c506.png' style="vertical-align:middle;" width="372" height="37" alt="{\color[RGB]{2,112,20}{\bm{v = \lambda \cdot \nu}}}\ \to\ v = 0.5\ m\cdot 4\ s^{-1} = \fbox{\color[RGB]{192,0,0}{\bm{2\ \frac{m}{s}}}}" title="{\color[RGB]{2,112,20}{\bm{v = \lambda \cdot \nu}}}\ \to\ v = 0.5\ m\cdot 4\ s^{-1} = \fbox{\color[RGB]{192,0,0}{\bm{2\ \frac{m}{s}}}}" /></p> <br/> If velocity is constant, when the frequency is doubled, <b>the wavelength must be halved</b>. <br/> <br/> Similarly, if the frequency is halved, <b>the wavelength must be doubled</b>.</math></p></div> https://ejercicios-fyq.com/Velocity-of-a-wave-2911 https://ejercicios-fyq.com/Velocity-of-a-wave-2911 2015-01-06T07:52:24Z text/html es F_y_Q Propagation speed SOLVED <p>The wavelength of a wave is 0.00015 m and its frequency is 7 000 Hz. What is the velocity of the wave?</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Propagation-speed" rel="tag">Propagation speed</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>The wavelength of a wave is 0.00015 m and its frequency is 7 000 Hz. What is the velocity of the wave?</p></div> <hr /> <div <div class='rss_ps'><p>The velocity of the wave is calculated using the formula: <br/> <br/> <img src='https://ejercicios-fyq.com/local/cache-TeX/6fbb8a552bf0eb59c759959cd2c47a64.png' style="vertical-align:middle;" width="88" height="16" alt="\color[RGB]{2,112,20}{\bm{v= \lambda \cdot \nu}}" title="\color[RGB]{2,112,20}{\bm{v= \lambda \cdot \nu}}" />: <br/> <br/> Therefore, the velocity of the wave is: <br/> <br/> <p class="spip" style="text-align: center;"><img src='https://ejercicios-fyq.com/local/cache-TeX/8c3c129abcc5c0597169cfc0e67a2722.png' style="vertical-align:middle;" width="348" height="37" alt="v = 0.00015\ m\cdot 7\ 000\ Hz= \fbox{\color[RGB]{192,0,0}{\bm{1.05\ \frac{m}{s}}}}" title="v = 0.00015\ m\cdot 7\ 000\ Hz= \fbox{\color[RGB]{192,0,0}{\bm{1.05\ \frac{m}{s}}}}" /></p> </math></p></div> https://ejercicios-fyq.com/Refraction-and-speed-of-light-2759 https://ejercicios-fyq.com/Refraction-and-speed-of-light-2759 2014-10-22T05:02:04Z text/html es F_y_Q Propagation speed Refractive index Refraction SOLVED <p>The refractive index of green light in water is 1.42. What is its speed when it travels through water? <br class='autobr' /> (Velocity of light in a vacuum is 300 000 km/s).</p> - <a href="https://ejercicios-fyq.com/Waves" rel="directory">Waves</a> / <a href="https://ejercicios-fyq.com/Propagation-speed" rel="tag">Propagation speed</a>, <a href="https://ejercicios-fyq.com/Refractive-index" rel="tag">Refractive index</a>, <a href="https://ejercicios-fyq.com/Refraction" rel="tag">Refraction</a>, <a href="https://ejercicios-fyq.com/SOLVED" rel="tag">SOLVED</a> <div class='rss_texte'><p>The refractive index of green light in water is 1.42. What is its speed when it travels through water?</p> <p>(Velocity of light in a vacuum is 300 000 km/s).</p></div> <hr /> <div <div class='rss_ps'><p>The formula for calculating the refractive index is: <br/> <br/> <img src='https://ejercicios-fyq.com/local/cache-TeX/9393c9bdce5c7e01f166d3f9fe43976d.png' style="vertical-align:middle;" width="63" height="44" alt="\color[RGB]{2,112,20}{\bm{n = \frac{c}{v}}}" title="\color[RGB]{2,112,20}{\bm{n = \frac{c}{v}}}" /> <br/> <br/> Solving the equation to determine the speed of light: <br/> <br/> <p class="spip" style="text-align: center;"><img src='https://ejercicios-fyq.com/local/cache-TeX/94fb96afd2b467fe7d92b8bb49bdebbd.png' style="vertical-align:middle;" width="358" height="51" alt="{\color[RGB]{2,112,20}{\bm{v = \frac{c}{n}}}} = \frac{300\ 000\ \frac{km}{s}}{1.42} = \fbox{\color[RGB]{192,0,0}{\bm{211\ 268\ \frac{km}{s}}}}" title="{\color[RGB]{2,112,20}{\bm{v = \frac{c}{n}}}} = \frac{300\ 000\ \frac{km}{s}}{1.42} = \fbox{\color[RGB]{192,0,0}{\bm{211\ 268\ \frac{km}{s}}}}" /></p> </math></p></div>