Bilingual Scientific Lexicon

STEM Concept Dictionary

Standardized symbols, defining mathematical equations, SI & CGS units, dimensional analysis, and scalar/vector classifications.

Molar Mass(মোলার ভর)

NCTB রসায়ন অধ্যায় ৬ / NCERT Class 11

scalar

The mass of a given substance divided by the amount of that substance, measured in g/mol.

Defining Equation:M = \frac{m}{n}

Standard SI Unit:kg/mol (ব্যবহারিক: g/mol)

Dimensional Analysis: [M N^{-1}]

Velocity(বেগ)

NCTB পদার্থবিজ্ঞান অধ্যায় ৩

vector

The rate of change of position of an object with respect to time in a specified direction.

Defining Equation:\vec{v} = \frac{d\vec{r}}{dt}

Standard SI Unit:m/s (মিটার/সেকেন্ড)

Dimensional Analysis: [L T^{-1}]

Acceleration(ত্বরণ)

NCTB পদার্থবিজ্ঞান অধ্যায় ৩

vector

The rate at which the velocity of an object changes over time.

Defining Equation:\vec{a} = \frac{d\vec{v}}{dt}

Standard SI Unit:m/s² (মিটার/সেকেন্ড²)

Dimensional Analysis: [L T^{-2}]

Force(বল)

নিউটোনীয় বলবিদ্যা

vector

An interaction that causes an object of mass m to accelerate in the direction of the net applied force.

Defining Equation:\vec{F} = m\vec{a} = \frac{d\vec{p}}{dt}

Standard SI Unit:N (নিউটন) বা kg·m/s²

Dimensional Analysis: [M L T^{-2}]

Kinetic Energy(গতিশক্তি)

কাজ, ক্ষমতা ও শক্তি

scalar

The energy possessed by an object due to its macroscopic motion.

Defining Equation:E_k = \frac{1}{2}mv^2 = \frac{p^2}{2m}

Standard SI Unit:J (জুল) বা N·m

Dimensional Analysis: [M L^2 T^{-2}]

Power(ক্ষমতা)

কাজ, ক্ষমতা ও শক্তি

scalar

The amount of energy transferred or converted per unit time.

Defining Equation:P = \frac{dW}{dt} = \vec{F} \cdot \vec{v}

Standard SI Unit:W (ওয়াট) বা J/s

Dimensional Analysis: [M L^2 T^{-3}]

Electronegativity(তড়িৎ ঋণাত্মকতা)

পর্যায় সারণী ও রাসায়নিক বন্ধন

constant

A chemical property that describes the tendency of an atom to attract a shared pair of electrons.

Defining Equation:\chi_A - \chi_B = 0.102 \sqrt{\Delta}

Standard SI Unit:এককবিহীন (Dimensionless)

Dimensional Analysis: [M^0 L^0 T^0]

Planck Constant(প্লাঙ্কের ধ্রুবক)

কোয়ান্টাম পদার্থবিজ্ঞান ও পরমাণু মডেল

constant

Fundamental physical constant characterizing the mathematical relationship between photon energy and frequency.

Defining Equation:E = h\nu

Standard SI Unit:J·s (জুল-সেকেন্ড)

Dimensional Analysis: [M L^2 T^{-1}]

Electric Potential(তড়িৎ বিভব)

স্থির তড়িৎ ও চল তড়িৎ

scalar

The amount of work energy needed to move a unit of electric charge from a reference point to a specific point.

Defining Equation:V = \frac{W}{q}

Standard SI Unit:V (ভোল্ট) বা J/C

Dimensional Analysis: [M L^2 T^{-3} I^{-1}]

Electrical Resistance(বৈদ্যুতিক রোধ)

চল তড়িৎ

scalar

A measure of the opposition to current flow in an electrical circuit.

Defining Equation:R = \frac{V}{I} = \rho \frac{L}{A}

Standard SI Unit:\Omega \text{ (ওহম)}

Dimensional Analysis: [M L^2 T^{-3} I^{-2}]