## What is GH in physics?

so ρgh is the gravitational potential energy per unit volume.

## Does work equal MGH?

Work is the energy transferred into or out of a system through the action of a force. Work done against gravity can be found using the equation Work equals Force times height or W = Fh. Since F = mg we can use the equation W = mgh. (m = mass, g = gravity, or 9.81 m/s² and h = height).

## What is density in physics class 9?

The mass of a unit volume of a substance is called its density. Relative density of a substance is defined as the ratio between the density of the substance to the density of water at 40C. Relative density is also known as specific gravity. The relative density of a substance is a pure number without any unit.

## How do u calculate mass?

To find an object’s mass using its weight, the formula is Mass equals Weight divided by the Acceleration of Gravity (M = W ÷ G). Convert the weight measured in pounds to the equivalent in Newtons. In the formula for determining mass based on weight, mass is measured in Newtons.

## What is this symbol ψ?

Psi (uppercase/lowercase Ψ ψ) is the 23rd letter of the Greek alphabet. It is used to represent the “ps” sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 700.

## What is Class 9 Archimedes Principle?

What does Archimedes’ Principle state? Archimedes principle also states that: “When a body is immersed in a liquid, an upward thrust, equal to the weight of the liquid displaced, acts on it.” Thus, when a solid is fully immersed in a liquid, it loses weight which is equal to the weight of the liquid it displaces.

## What unit is density in?

Kilogram per cubic meter

## What is the atomic mass of first 20 elements?

Atomic Mass of First 30 Elements

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

18 | Argon | 39.948 |

19 | Potassium | 39.098 |

20 | Calcium | 40.078 |

21 | Scandium | 44.956 |

## What is Rho in physics?

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 H pressure?

h = depth of fluid. The pressure from the weight of a column of liquid of area A and height h is. The most remarkable thing about this expression is what it does not include. The fluid pressure at a given depth does not depend upon the total mass or total volume of the liquid.

## What is formula of atomic mass?

The formula for atomic mass is given below. Atomic mass = Mass of protons + Mass of neutrons + Mass of electrons.

## What is the SI unit of mass?

The SI unit of mass is the kilogram (kg). In science and technology, the weight of a body in a particular reference frame is defined as the force that gives the body an acceleration equal to the local acceleration of free fall in that reference frame.

## What is Class 9 mass number?

Mass Number or Atomic Mass Since, protons and neutrons reside in the nucleus, thus they are also known as nucleons. (1) Atomic mass of aluminium is 27 u and atomic number is 13, find the number of protons and number of neutrons in aluminium. (2) The atomic number of carbon is 6 and number of neutron is equal to 6.

## What is the formula of mass and weight?

Weight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.

## Who invented electron?

Joseph John Thomson

## Who is the father of electron?

Thomson

## What is the symbol of density called?

rho

## What material has the highest density?

Osmium

## Why is atomic weight not a whole number?

Atomic mass is never an integer number for several reasons: The atomic mass reported on a periodic table is the weighted average of all the naturally occuring isotopes. Being an average it would be most unlikely to be a whole number. The mass of an individual atom in atomic mass units is the mass relative to carbon-12.

## What is atomic number class 9th?

The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. Atomic number = Number of protons.

## Who is the head of Mass General Hospital?

David Torchiana (2003–)

## What do you call the element from atomic number 57 71?

What do you call the element series from atomic number 57-71? Silicon.

## What is density in physics?

Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

## What is G in pressure?

P = ρgh. P = pressure (Pa) ρ = density of a gas or fluid (kg/m3) g = acceleration due to gravity (9.80 m/s2)

## Can you convert weight to mass?

Weight is a force and it can replace force in the equation. The acceleration would be gravity, which is an acceleration. F = m * a. To change from weight to mass divide by gravity (9.8 m/s^2).