**Momentum** is a measurement of mass in motion: how much mass is in how much motion. It is usually given the symbol p. This simple relationship means that doubling either the mass or velocity of an object will simply double the momentum.

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## What does P stand for in physics?

p = pressure. p = momentum. π = 3.14. Pa = pascal (pressure)

## Why do they use p for momentum?

In the letter Brown asks why the letter “p” is used for momentum. Clearly, were the letter “m” used, there might well be confusion with mass. The German word for momen- tum is der Impuls [sic] and the French is l’impulsion. For this reason the Germans and French chose “p” for momentum.

## What is current formula?

The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## What does V mean in P MV?

In symbols, linear momentum p is defined to be p = mv, where m is the mass of the system and v is its velocity. Newton’s second law of motion in terms of momentum states that the net external force equals the change in momentum of a system divided by the time over which it changes.

## Why is J used for impulse?

The vector quantity for impulse is represented by the letter “J”, and since it’s a change in momentum, its units can be one the same as those for momentum, [kg·m/s], and can also be written as a Newton-second [N·s].

## What is SI unit current?

Unit of electric current: ampere (A) The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×10^{−}^{19} when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆ν_{Cs}.

## What is current unit?

The SI unit of current is ampere which measures the flow of electric charge across a surface at the rate of one coulomb per second. Since the charge is measured in coulombs and time in seconds, so the unit is coulomb/Sec (C/s) or amp. Meanwhile, the formula for electric current is given as follows: I = V/R.

## What is resistivity formula?

Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.

## What is Ø in physics?

Ø is used for the empty set and I think they should have use ∆Q not ØQ. ∆ is used to denote a finite amount of something:∆t-some amount of time, ∆x some distance in the x direction,∆Q some charge.

## What does D in physics stand for?

“d” means change in the limit that the change is infinitestimal. in your particular exapmle: really means “average” current because that’s total change in charge over total change in time: in fact it means., now when in the limit of very small change. ie.