🔭 physics

1. **Problem (31):** Given moments $M_B=8$ N.cm and $M_C=12$ N.cm for forces acting in plane of $\triangle ABC$, find $M_D$.\n\nSince moments relate proportionally to distances in

1. Problem (36): Given two rods AO and OB each 50 cm long with forces acting as follows: 16\sqrt{2} N force at 45° downward/right along AO, 20 N horizontal left along AO, and 30 N

1. Stating the problem: We are asked to formulate and solve a linear motion problem using algebra. 2. Linear motion involves an object moving at a constant speed. The fundamental f

1. সমস্যা: তাপের এককে ভরের একক দিয়ে ভাগ করলে কোন একক পাওয়া যায়? 2. প্রথমে দেখি প্রশ্নের অর্থ: তাপের একক (যেমন: জুল, J) থেকে ভরের একক (যেমন: কিলোগ্রাম, kg) দিয়ে ভাগ করলে আমরা কি কি

1. প্রশ্নটি হলো: যদি তামার আপেক্ষিক তাপ ক্ষমতা $400\,\text{kg}^{-1}K^{-1}$ হয়, তাহলে 5 কেজি তামারের মোট তাপধারণ ক্ষমতা কত হবে? 2. আপেক্ষিক তাপ ক্ষমতা বা নির্দিষ্ট উত্তাপ হল 1 কিলো

1. **State the problem:** We want to determine the focal length $f$ of a given lens using the experiment described, to check if it can replace a damaged spectacle lens. 2. **Explai

1. **State the problem:** Determine the focal length $f$ of a given lens to check if it can replace a damaged spectacle lens. 2. **Given:** Hypothesis focal length range is $8.0\te

1. **State the problem:** We have three groups measuring the length of a board with given trial measurements. The actual length is 2.5 m.

1. The diffusion equation, often written as $$\frac{\partial u}{\partial t} = D \frac{\partial^2 u}{\partial x^2},$$ describes how a substance diffuses over time along one spatial

1. **State the problem:** Given the speed-time graph of a car, find: a) Acceleration during first 8 seconds.

1. The problem states a vehicle travels between two towns, Lobi and Pojo, covering the first half of the distance at 60 km/h and the second half at 90 km/h. The total distance is 3

1. Given a gas at constant volume, pressure and temperature are related by Gay-Lussac's Law: $$\frac{p_1}{T_1} = \frac{p_2}{T_2}$$ 2. From the first heating step, initial temperatu

1. **State the problem:** We are given a volume of air in a tyre: $4000$ cm$^3$. We need to calculate the pressure $p$ in Pascals (Pa). 2. **Assume ideal gas behavior and apply Boy

1. **State the problem:** We have air initially at atmospheric pressure $P_1 = 100000$ Pa. It is pumped into a tyre where the pressure is $P_2 = 550000$ Pa and volume is $V_2 = 300

1. The problem involves finding the volume of air in two conditions: at atmospheric pressure and inside a tyre. 2. Typically, the volume inside the tyre, $V$, can be related to atm

1. We are given that the initial pressure $p_1 = 500000$ Pa and initial volume $V_1 = 10$ cm$^3$. The atmospheric pressure is $p_2 = 100000$ Pa. 2. Using Boyle's Law, which states

1. প্রশ্নটি বুঝে নিই: হেমিলটনের নিচে থেকে অর্থাৎ হেমিলটনের অনুক্রমে গতির সমীকরণ (Hamilton's equations) প্রতিষ্ঠা করতে হবে। 2. হেমিলটনের গাণিতিক কাঠামো হলো $H(q,p,t)$ যেখানে $q$ হলো

1. مسئله را بیان کنیم: سرعت قایق در آب راکد $v_b=100$ متر در دقیقه است. 2. فاصله رفت و برگشت $d=1200$ متر است.

1. State the problem: Which diagram satisfies the vector equation $\vec{C}=\vec{A}+\vec{B}$? 1. Explain the criterion: The sum $\vec{A}+\vec{B}$ is formed by placing $\vec{B}$ head

1. **State the problem:** We have a trap door hinged at point A with width 100 cm.

1. **Problem statement:** A girl uses a spanner of length 20 cm and pulls at right angles with a force of 50 N. We need to calculate the moment of her pull. 2. **Understanding the