A = **area**. A = nucleon number (atomic mass) a = acceleration.

In the field of physics, the letter 'T' is often used to denote the **period of oscillation** (commonly reffered to as simply 'period'). The period of oscillation can be defined as the duration of time between one wave and the next one passing the same spot. Its units are usually expressed in seconds.

The definition of H is H = B/μ − M, where B is the **magnetic flux density**, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization.

Mathematically, Hooke's law states that the **applied force F equals a constant k times the displacement or change in length x**, or F = kx. The value of k depends not only on the kind of elastic material under consideration but also on its dimensions and shape. Britannica Quiz. Physics and Natural Law.

delta z - this is **the midpoint of the rectangle**. **z(x,y) = A + Bx + Cy**.

In general physics, delta-v is a change in velocity. The Greek uppercase letter Δ (delta) is the standard mathematical symbol to represent **change in some quantity**.

watt. ω, ω **rotational velocity**, rotational speed.

newton, **absolute unit of force in the International System of Units** (SI units), abbreviated N. It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second.

In an electric circuit, R stands for **Resistance**. Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).

The Coulomb constant, the electric force constant, or the electrostatic constant (denoted k_{e}, k or K) is **a proportionality constant in electrostatics equations**. In SI units it is equal to 8.9875517923(14)×10^{9} kg⋅m^{3}⋅s^{−}^{2}⋅C^{−}^{2}.

A = **area**. A = nucleon number (atomic mass) a = acceleration.

John Dalton

Isotopes are **two or more forms of the same element that contain an equal number of protons but different numbers of neutrons in their nuclei**, and hence differ in relative atomic mass but not in chemical properties.

As such, it has the same atomic number as hydrogen, which means you break the tie on atomic mass -- **deuterium is higher priority than hydrogen** but lower than everything else.

Isotopes are **the atoms of an element which have the same number of protons but different numbers of neutrons**. In other words, you can say that the isotopes have the same atomic number, as the number of protons remain the same, but they have different atomic masses due to the different number of neutrons.

The mass of one mole of a substance is **equal to that substance's molecular weight**. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams.

Nomenclature. Equations. **Mass number**. A = (Relative) atomic mass = Mass number = Sum of protons and neutrons. N = Number of neutrons.

**No, it's not in CBSE**. The topics which are removed by CBSE in current syllabus are. Transistor as an oscillator, transistor as switch, atomic masses, isotopes,isobars,isotones,human eye, Image formation and accomodation, correction of eye defects, van de graaff generator.

A mole is defined as **that amount of substance which has mass equal to gram atomic mass if the substance is atomic or gram molecular mass if the substance is molecular**. 1 mole of carbon atoms =12 grams. 1 mole of sodium atoms = 23 grams. 1 mole of Oxygen atom = 16 grams. 1 mole of Oxygen molecule = 32 grams.

**Z is used to signify the atomic number or proton number of an atom**. Z = # of protons of an atom. A is used to signify the atomic mass number (also known as atomic mass or atomic weight) of an atom. A = # protons + # neutrons. A and Z are integer values.

Atomic Mass of First 30 Elements

ATOMIC NUMBER | ELEMENT | ATOMIC MASS |
---|---|---|

1 | Hydrogen | 1.008 |

2 | Helium | 4.0026 |

3 | Lithium | 6.94 |

4 | Beryllium | 9.0122 |

Dated : 17-May-2022

Category : Education