🔭 physics

1. The problem is to calculate the voltage $V$ given the expression: $$50 \times 4 \times 10^{-3} \times 0.8 \times 15\pi$$ 2. Calculate the product of the constants first: $$50 \t

1. Find the velocity at $t=2$ seconds for $s(t) = 2t^2 - 5t + 3$. Velocity is the derivative of displacement:

1. Problem: Find velocity at $t=2$ given displacement $s(t)=2t^2 - 5t + 3$ Step 1: Recognize that velocity $v(t)$ is the first derivative of displacement $s(t)$ with respect to tim

1. **Problem statement:** (a) Define specific heat capacity, specific latent heat, and thermal equilibrium.

1. **Exercice 01 : Calcul de la puissance, énergie et prix journalier** Le problème donne 20 lampes de 150 W chacune, allumées 8 heures par jour. Le coût de 1 kW est 0,75 DH.

1. **Problem statement:** Calculate the curvature radius $\rho$ at time $t=2$ seconds given velocity $\mathbf{v}$ and acceleration $\mathbf{a}$. 2. The formula for curvature radius

1. **State the Problem:** We have a 7.5-kg block resting against a vertical wall with friction coefficients\n static friction $\mu_s = 0.45$, kinetic friction $\mu_k=0.35$, and an

1. **State the problem:** A soccer ball is kicked with initial velocity $v_0=25$ m/s at an angle $\theta=40^\circ$ above the horizontal. We need to find a. Time of flight

1. **Problem:** Two charges $q_1 = -0.25 \times 10^{-6} C$ at $x=0$ and $q_2 = 6 \times 10^{-6} C$ at $x=1\,m$ on x-axis. Find point $x$ where electric field is zero. 2. **Solution

1. **Problem statement:** Find the voltage $V_2$ across the resistor $R_2 = 3\ \Omega$ and the current $I_4$ through resistor $R_4 = 8\ \Omega$ in the given circuit.

1. Problem 5: Given point charges $q_1, q_2, q_3$ inside a spherical Gaussian surface $S$ of radius $R$, and charge $q_4$ outside $S$, we analyze the total electric flux through $S

1. **State the problem:** Given a circuit with total resistance $$R_T = 4\ \Omega$$, currents and resistances $$I_1 = 4\ A$$, $$R_1 = 10\ \Omega$$, $$R_2 = 20\ \Omega$$, and unknow

1. **Problem statement:** We want to solve parts c and d related to a volume with given parameters. 2. Given data:

1. السؤال الأول: حساب التيار $I_1$ في الدائرة الكهربائية المعطاة مع مقاومات 5 أوم متصلة ومصدر جهد 12.5 فولت ومقاومة داخلية $r=1.25\ \Omega$. 2. نبدأ بتحليل الدائرة: مجموع المقاومات

1. The problem is to calculate the energy released per kilogram (J/kg) by a system where the fall height difference is 800 m and the specific heat capacity is 4200 J/kg °C. 2. Give

1. The problem asks to describe the concept of electric dipole with an illustration. An electric dipole consists of two equal and opposite charges, +q and -q, separated by a small

1. Statement of the problem: Before a load is applied the open-circuit terminal voltage is 40 V, and when a load of 500 \Omega is attached the terminal voltage falls to 38.5 V. Wha

1. The problem asks: What is friction? 2. Friction is a force that opposes the motion of an object when it is in contact with another object or surface.

1. **State the problem:** An object falls from rest with displacement given by $s = 16t^2$, where $s$ is the distance fallen in feet after $t$ seconds. We need to find: (a) The ave

1. **Indicate type of force for each action:** - Screwing in a light bulb: **Turn or Twist** (forces involved twist motion)

1. **Problem statement:** Given an AC circuit with voltage sources and components as follows: - $e_1 = e_3 = 220\sqrt{2} \sin 314t\ (V)$