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Home Question Bank Physics Archive 2024 November 13

Physics Questions from Nov 13,2024

Browse the Physics Q&A Archive for Nov 13,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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What is the frequency of a red light with a wavelength of \( 6.50 \times 10^{-7} \mathrm{~m} \) ? \( [?] \times 10^{[?]} \mathrm{Hz} \) \( c=3.0 \times 10^{8} \mathrm{~m} / \mathrm{s} \) What is the frequency of a red light with a wavelength of \( 6.50 \times 10^{-7} \mathrm{~m} \) ? \( [?] \times 10^{[6]} \mathrm{Hz} \) \( c=3.0 \times 10^{8} \mathrm{~m} / \mathrm{s} \) Which choice solves the equation \( c=\lambda \cdot f \) for frequency at the speed of light? \( c= \) speed of light \( \quad \begin{array}{l}\lambda=\text { wavelength } \\ f=\text { frequency }\end{array} \) \( f=\frac{\lambda}{c} \quad f=\frac{c}{\lambda} \) (b) A different ray of light has an angle of incidence (i) of 48 The speed of light in air (c) is \( 3.0 \times 10^{8} \mathrm{~ms}^{-1} \). The speed of light in glass \( (v) \) is \( 2.0 \times 10^{8} \mathrm{~ms}^{-1} \). Calculate the angle of refraction \( (r) \) for this ray of light. 62 Date le grandezze \( A=(85,0 \pm 0,1) \mathrm{cm}, B=(42,6 \pm 0,1) \mathrm{cm} \) e \( C=(22,0 \pm 0,1) \mathrm{m} \), calcola il volume \( V=A \cdot B \cdot C \), determi- nane l'errore relativo e l'incertezza, arrotonda i risultati e scrivi la misura. Typical Exam Question: A heating coil made from 11 metres of wire is connected to a 240 mains supply. The wire has diameter of 0.25 mm and resistivity \( 1.0 \times 10^{-6} \Omega \mathrm{~m} \). (a) Calculate its resistance Which of the following situations is the most dangerous for humans? Group of answer choices A high voltage for a short time A high current for a long time A high current for a short time A high voltage for a long time If you plug an electric toaster rated at \( 110-\mathrm{V} \) into a \( 220-\mathrm{V} \) outlet, current in the toaster will be about half what is should be. more than twice what it should be. twice what it should be. the same as if it were plugged into \( 110-\mathrm{V} \). 3. Un móvil viaja con velocidad de \( 21 \mathrm{~m} / \mathrm{s} \) una distancia de 1.5 km . ¿Cuál es el tiempo requerido? A) \( 71,42 \mathrm{~s} \) B) \( 72,14 \mathrm{~s} \) C) \( 64,25 \mathrm{~s} \) D) \( 74,12 \mathrm{~s} \) 4. ¿Qué representa la pendiente de una linea en una gráfica de distancia-tiempo? A) La aceleración B) La velocidad C) El desplazamiento D) El tiempo total When a \( 10-\mathrm{V} \) battery is connected to a resistor, 2 A of current flow in the resistor. What is the resistor's value? 10 ohms 20 ohms more than 20 ohms 5 ohms 2 ohms
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