🔭 physics

1. **Énoncé du problème** : Nous étudions un modèle d'Ising sur un réseau de N sites avec un moment magnétique \(\vec{\mu}\) pouvant prendre les valeurs \(\pm \mu\) selon l'axe z.

1. **Problem statement:** Three point charges are arranged on a line: $q_3 = +5.00$ nC at the origin ($x=0$), $q_2 = -3.00$ nC at $x=+4.00$ cm, and $q_1$ at $x=+2.00$ cm. Find the

1. **State the problem:** Calculate the net torque acting on a door with width $L=0.6$ m subjected to 6 forces each of magnitude $F=50$ N as shown in the diagram. The hinge is on t

1. **Problem Statement:** Find the area of the parallel plates of a 1.0-F capacitor separated by 1.0 mm, given the permittivity of free space $\varepsilon_0$ in F/m.

1. **State the problem:** We have a capacitor with capacitance $C = 1.0$ F and plate separation $d = 1.00$ mm $= 1.00 \times 10^{-3}$ m. We need to find the area $A$ of the plates.

1. **ปัญหา:** เรือสินค้าลำหนึ่งเดินเรือไปทางทิศ 060° ด้วยอัตราเร็ว 40 กิโลเมตรต่อชั่วโมง ขณะนั้นมีกระแสน้ำไหลไปทางทิศ 150° ด้วยอัตราเร็ว 30 กิโลเมตรต่อชั่วโมง จงหาว่าเรือลำนี้จะเคล

1. **Problem:** A cylindrical roller has a diameter of 48 inches and makes 0.7 revolutions per second. Find the angular speed in radians per second and the linear speed in inches p

1. **Problem statement:** A particle moves along a straight line from a fixed point O with acceleration $a$ proportional to the square of its displacement $r$ from O, given by $$a

1. **Problem 16.19** When a Perspex rod is rubbed on a woollen cloth, the rod acquires a negative electric charge.

1. Masalah ini meminta kita untuk huraikan perubahan kedudukan burung itu. 2. Perubahan kedudukan bermaksud jarak dan arah burung itu bergerak dari kedudukan asal ke kedudukan baru

1. Soalan meminta kita untuk huraikan perubahan kedudukan burung itu. 2. Perubahan kedudukan bermaksud perbezaan antara kedudukan akhir dan kedudukan awal burung.

1. Masalah ini meminta kita mengira perubahan kedudukan burung apabila jarak antara burung dan penyu adalah 9.07 m. 2. Diberi jarak awal burung ialah $1\frac{3}{4}$ m, yang boleh d

1. **بيان المشكلة:** لدينا دائرة كهربائية تحتوي على بطارية ذات جهد داخلي $V_B$ ومقاومة داخلية $r$. عند فتح المفتاح $K$، قراءة الفولتميتر هي 9 فولت، وعند غلق المفتاح تصبح القراءة 8

1. **State the problem:** We need to find the area of the plates of a capacitor given the plate separation $d = 2.0 \times 10^{-3}$ m and the capacitance $C = 1$ F. 2. **Formula us

1. **State the problem:** We need to find the charge stored on either plate of a capacitor with capacitance $4 \times 10^{-6}$ F when connected to a 12 V battery. 2. **Formula used

1. **Problem 7:** A particle of charge 1.8 μC is at the center of a Gaussian cube 55 cm on edge. Find the net electric flux through the surface. 2. **Formula:** According to Gauss'

1. **Problem 7:** A particle of charge 1.8 μC is at the center of a Gaussian cube 55 cm on edge. Find the net electric flux through the surface. 2. **Formula:** According to Gauss'

1. **Problem statement:** Given forces $F_1$, $F_2$, and $F_3$ with the relation $$F_3 = 2F_2 = 3F_1,$$ and distances along the beam segments $AB=5$ cm, $BC=3$ cm, and $CD=4$ cm, w

1. **Problem statement:** Prove that $\lambda' - \lambda = \lambda_c (1 - \cos \theta)$. 2. **Understanding the terms:** Here, $\lambda'$ is the wavelength after scattering, $\lamb

1. The problem is to understand and apply Gauss's Law in electromagnetism. 2. Gauss's Law states that the total electric flux $\Phi_E$ through a closed surface is equal to the char

1. **Problem 1: Brittney's run around the track** Brittney runs 400 m around a track and ends up at the starting point.