Does a gravitational field has an energy density like an electric field?
The gravitational field does have an energy density, like any other field.
What is gravitational energy density?
Energy density is a measure of the energy stored in the field per unit volume of space. Let us use the similarity between the gravitational and electric fields to construct a gravitational energy density term. We begin by noting how the permittivity of free space enters into the expression for E: E = kQ/r2. 4.
Does density affect gravitational field strength?
Objects that are denser have a greater concentration of mass, thus creating a larger gravitational pull than a same-sized object with lower density—i.e., a cubic foot of solid rock will exert a larger pull on its surroundings than a cubic foot of ocean.
Where is the gravitational field the strongest?
Earth’s Gravity is strongest on the ground, usually at sea level, and weaker as you move away from the core, eg the peak of Mt. Everest. The gravity at the poles is stronger than the equator, partly because the obloid earth is slightly wider, but only by a small ratio.
Why does gravitational field strength vary?
An object’s gravitational field strength depends on its MASS. The Moon has less mass than the Earth, so its gravitational field is much weaker – approx 1/6th of the Earth’s. This means that we could jump higher on the Moon, and objects would fall more slowly, as they experience a weaker gravitational force.
Does gravitational field have mass?
From the quantum perspective, that means gravity behaves like a particle with no mass; this hypothetical particle is called a graviton. Gravitons are to gravity what photons are to light, and the two types of particles have a lot in common.
How is gravitational energy calculated?
The equation or formula for calculating gravitational potential energy is: GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on earth), and h is the height above the ground in meters.
Does higher density mean higher gravity?
Density is a measure of how much mass is concentrated in a given space. For example, a container filled with a more dense material like granite rock has more mass and thus more gravitational attraction than that same container filled with water.
Does density relate to gravity?
Specific gravity is in direct relationship with density. It is the ratio of an object’s density, and its contact substance. For example, if you want to place an object in water, the specific gravity would tell you if it would float or not.
Where on earth is gravity weakest?
the equator
The force of gravity is weakest at the equator because of the centrifugal force caused by the Earth’s rotation and because points on the equator are furthest from the center of the Earth. The force of gravity varies with latitude and increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles.
Does gravitational field strength vary?
The weight of an object and the gravitational field strength are directly proportional. For a given mass, the greater the gravitational field strength of the planet, the greater its weight….Gravity on other objects in space.
| Space object | g, gravitational field strength (N/kg) |
|---|---|
| Neptune | 11.7 |
| Pluto (dwarf planet) | 0.49 |
Is gravitational field strength the same as gravity?
gravity force (weight) is measured in newtons (N) mass is measured in kilograms (kg) gravitational field strength (g) is measured in newtons per kilogram (N/kg)