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Home Question Bank Physics Archive 2025 January 04

Physics Questions from Jan 04,2025

Browse the Physics Q&A Archive for Jan 04,2025, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Exercice 04: Déviation minimum . In prisme en verre d'indice \( n=1.5 \), a pour section droite un triangle équilatéral. - Déterminer l'angle de déviation minimum \( D_{m} \) lorsque le prisme est placé dans l'air d'indice \( n_{0}=1 \). -- Quelle est la valeur de l'angle de déviation minimum \( D_{m}^{\prime} \) lorsque le prisme est plongé dans l'eau 1'indice \( n_{1}=4 / 3 \) ? 1. Desde lo conservación de energía: \[ g \cdot(l-H+l \cdot \cos (\phi))=\frac{r^{2}}{2} \] 2. Descomposición de la tensión en la cuerda: \[ T=m \cdot\left(\frac{v^{2}}{T}+g \cdot \cos (\phi)\right) \] 3. Usando \( F_{\text {that }}-T \) 4. Sustituvendo valores: \[ 52.5-15\left(\frac{\sqrt{2}+1}{0.9+9}+1 \cdot \cos \left(\frac{1}{2}\right)\right. \] 1. Desde la conservación de energía: \( g \cdot(l-H+l \cdot \cos (\phi))=\frac{v^{2}}{2} \) 2. Descomposición de la tensión en la cuerda: \( T=m \cdot\left(\frac{v^{2}}{l}+g \cdot \cos (\phi)\right) \) 3. Usando \( F_{\max }=T: \) \( 52.5=m \cdot\left(\frac{v^{2}}{l}+g \cdot \cos (\phi)\right) \) (4) In the opposite figure : AB is a uniform rod connected to a hinge at point A in the wall if the rod is kept in equilibrium by horizontal force act at B , then \( \mathrm{m}(\angle \theta)=\cdots \cdots \ldots . . .{ }^{\circ} \) \( \begin{array}{lll}\text { (a) } 30 & \text { (b) } 45 & \text { (c) } 60\end{array} \) 3.73 ••• Em uma partida de futebol da Copa do Mundo, José está correndo para o gol na direção norte, com velocidade de \( 8,0 \mathrm{~m} / \mathrm{s} \) em relação ao solo. Um jogador do seu time passa a bola para ele. A bola tem velocidade de \( 12,0 \mathrm{~m} / \mathrm{s} \) e se move em uma direção de \( 37,0^{\circ} \) a nordeste em relação ao solo. Quais são o módulo e a direção da velocidade da bola em relação a José? หลอดไฟ 100 วัตต์ มีความเข้มแห่งการส่องสว่าง 25 แคนเดลา ถ้าต้องการความ สว่งบนโต๋ะ อ่านหนังสือเป็น 169 ลักซ์ จะต้องวางตำแหน่งหลอดไฟสูงจากพื้น โตีะเป็นระยะเท่าใด \( \begin{array}{llll}\text { 1) } 0.65 \text { เมตร } & \text { 2) } 0.50 \text { เมตร } & \text { 3) } 0.38 \text { เมตร } & \text { 4) } 0.24 \text { เมตร }\end{array} \) (24) Volume e densità di un cioccolatino Carlo e Federico misurano le dimensioni di un cioccolatino, ottenendo i seguenti valori per i tre spigoli \( a, b \) e \( c \) : \( a=(2,8 \pm 0,1) \mathrm{cm}, b=(2,2 \pm 0,1) \mathrm{cm}, c=(0,9 \pm 0,1) \mathrm{cm} \). Poi misurano la massa \( m \) del cioccolatino, che esprimono come \( m=(10 \pm 1) \mathrm{g} \). Scrivi correttamente il volume \( V \) e la densità \( d \) del cioccolatino. (24) Volume e densità di un cioccolatino Carlo e Federico misurano le dimensioni di un cioccolatino, ottenendo i seguenti valori per i tre spigoli \( a, b \) e \( c \) : \( a=(2,8 \pm 0,1) \mathrm{cm}, b=(2,2 \pm 0,1) \mathrm{cm}, c=(0,9 \pm 0,1) \mathrm{cm} \). Poi misurano la massa \( m \) del cioccolatino, che esprimono come \( m=(10 \pm 1) \mathrm{g} \). Scrivi correttamente il volume \( V \) e la densità \( d \) del cioccolatino. \( -kR^{2}\alpha =\frac{mR^{2}}{2}\times \frac{d^{2}\alpha }{dt^{2}} \) La sonde spatiale Venera 14 a atterri sur la planète Vénus au début des années 1980 . Son poids sur cette planète est égal à 4450 N . - Calculer la masse de la sonde connaissant l'inten- sité de la pesanteur sur Vénus: \( g_{\mathrm{v}}=8,9 \mathrm{~N} / \mathrm{kg} \). 46) Revorésenter un poids à l'échelle
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