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The Question & Answer (Q&A) Knowledge Managenet

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Table of Contents

- How do you calculate frequency?
- How do you find the frequency of a wavelength?
- What is the frequency of 1?
- What is Hz formula?
- What is the frequency of space?
- What are the dimensions of frequency?
- What are dimensional constants?
- Is Pi a dimensional constant?
- What are dimensional constants give examples?
- Are constants dimensionless?
- How many constants are there?
- Can a quantity have constant value and be dimensionless?
- Are all constants dimensionless or Unitless Why?
- Which are dimensionless quantities?
- Can a quantity have dimensions but still have no units?
- Are all constants of physical quantities Unitless or dimensionless give examples?
- Does the magnitude of a dimensionless quantity depend upon the system of units used?
- Can two different physical quantities have same dimensions?
- Can a quantity have neither unit nor dimension?
- Can a quantity have two sets of dimensions?
- What is the difference between unit and dimension?
- What are the dimensions of rate of flow?

To calculate frequency, divide the number of times the event occurs by the length of time. Example: Anna divides the number of website clicks (236) by the length of time (one hour, or 60 minutes).

Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v/f.

Frequency is equal to 1 divided by the period, which is the time required for one cycle. The derived SI unit for frequency is hertz, named after Heinrich Rudolf Hertz (symbol hz). One hz is one cycle per second.

Physical value | symbol | unit |
---|---|---|

Cycle duration | T = 1 / f | second |

Frequency | f = 1 / T | hertz |

Wavelength | λ | meter |

Wave speed | c | meter per second |

Exactly 47.71 MHz. The entire universe would begin to contract and the world as we know it would end.

It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. Frequency is measured in hertz (Hz) which is equal to one event per second….

Frequency | |
---|---|

In SI base units | s−1 |

Derivations from other quantities | f = 1 ∕ T |

Dimension |

[də′men·chən·əl ′kän·stənt] (physics) A physical quantity whose numerical value depends on the units chosen for fundamental quantities but not on the system being considered.

As a first step, we list the variables and dimensional constants (if any) assumed to be relevant. (a). as required and expected. The reader can also easily verify that both π1 and π2 in (e) are indeed dimensionless, i.e., their dimensions are 1.

Those constant which have dimension but constant value called dimensional constants , example of these constant like gravitational constant, electric field constant , efsonal(€) ,etc there are many dimension constants .

example, universal gravitational constant, Planck’s constant etc. do have dimensions.

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Yes, there are other quantities that are dimensionless, but have a unit. a dimensionless quantity will always be independent of the base units — meter, second, kilograms, kelvin, candela, moles, ampere.

Answer. All constants are unit less and we know the system or constant which ar2 unit less are always going to be dimensionless because we derive the dimension of a system from its unit only …..

All pure numbers are dimensionless quantities, for example 1, i, π, e, and φ. Units of number such as the dozen, gross, googol, and Avogadro’s number may also be considered dimensionless.

No, a quantity can’t have dimensions without having unit because dimensions are derived from units but the inverse isn’t true. A quantity can have unit without having dimensions.

Answer: You can also arrange the speed of light, Planck’s constant and the elementary charge to form a dimensionless number, the so-called fine structure constant .

Does the magnitude of a physical quantity depend on system of units chosen ? Yes. The magnitude of a physical quantity depends on system of units chosen.

Answer Expert Verified. no . for example both torque & energy has the same dimensions ML^2T^-2 . but they r diff physical quantity.

Answer: [A] Quantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they does not possess dimensional formulas. B a physical quntatity neither having units nor dimensions are trigonometric ratios,strain , specific gravity etc.

Yes, most definitely! The dimension of a physical quantity is a matter of convention which is established by the system of units. The Coulomb has dimensions of charge, Q, but the statcoulomb has dimensions of L3/2M1/2T−1.

Dimensions are physical quantities that can be measured, whereas units are arbitrary names that correlate to particular dimensions to make it relative (e.g., a dimension is length, whereas a meter is a relative unit that describes length).

Rate of flow is defined as the quantity of a fluid flowing per second through a section of a pipe or a channel. Rate of flow is also known as Discharge Q. Putting these values in above equation we get, Dimensional Formula of Rate of Flow= M0L3T-1.