Gravity

Earth is more massive than Mars and therefore has greater gravity.

Apollo 8 is not orbiting the moon - it completed 10 lunar orbits during its mission in December 1968. The spacecraft's velocity and direction are precisely calculated and adjusted with thruster burns to maintain its trajectory around the moon.

We can do a quick calculation using Newtonian gravity (which is sufficient here since we are far away from the black hole). We do need some data:

-The distance between the Sun and the centre of our Galaxy is 2.5 x 10^20 meters. Since the distance between the Earth and Sun is completely negligible at this scale we can use this as the distance between the Earth and the black hole.

-The mass of the Earth is about 6 x 10^24 kilograms.

-The mass of the central black hole is about 8 x 10^36 kilograms.

We can now use the following formula:

F = G * m_earth * m_black_hole / distance^2

Where G is some constant named the gravitational constant. If we use this formula we arise at a force of about 7.7 x 10^20 Newtons. This is the force the black hole exerts on the Earth, and it is also the force the Earth exerts on the black hole.

The gravitational pull of a brown dwarf system would be weaker than that of a star system but stronger than that of a planet. It is sufficient to keep the system objects in orbit around the brown dwarf.

Since there is more mass in the uranium nucleus, there would be a proportionally stronger gravitational force in the uranium nucleus. However, the gravitational force is the weakest force, and it is followed in scale by the weak atomic force, the electromagnetic force, and the strong atomic force, which are many orders of magnitude greater, so, in effect, the gravitational force does not even count in the vicinity of the nucleus.

Gravity on Earth is caused by the mass of the planet. Every object with mass exerts a gravitational force on other objects, pulling them towards it. The gravitational force on Earth is what keeps us grounded and determines the weight of objects.

The force of gravity is both everywhere around and inside Earth.

Gravity plays a role in erosion and deposition by influencing the movement of water in streams. Gravity causes water to flow downhill, enabling it to pick up and carry sediment and other materials. This flowing water can erode the streambed and banks, transporting the material downstream. When the water slows down, due to a decrease in gradient or obstacles in the stream, sediment is deposited, forming features like sandbars or river deltas.

It is called infiltration, where water moves from the surface into the soil due to the force of gravity. This process helps recharge groundwater supplies and supports plant growth by providing moisture to the roots.

Theoretically . . . (just like boring the tunnel through the globe in the first place) . . .

The pebble falls faster and faster until it reaches the center of the Earth. Then

it continues in the same direction but slower and slower. Its speed declines to

zero just as it drifts out of the other end of the tunnel. If nobody is there to

catch it, and it falls back into the tunnel, it goes through exactly the same thing

in reverse ... falling faster and faster until it reaches the center of the Earth,

then slower and slower until it drifts out of the tunnel again, right in front of

you, at the spot where you dropped it in the first time.

It's doing a gigantic pendulum, swinging surface-to-surface, fastest at the center

and zero speed at each end, where it reverses.

The period of the pendulum ... from the time you drop it in until it comes back up

in front of you out of the hole in the ground ... is 86 minutes.

Exactly the same period that it would have if it were an artificial satellite in the

lowest conceivable orbit ... the same size as the Earth's radius without running

into mountains or air.

If there's no air resistance and it doesn't run into things, then the size, shape,

mass, or weight of the pebble make no difference, in either exercise.

Mars is approximately 1/2 the diameter of Earth and since it is less massive than Earth, it has only 38% of Earth's gravity.

Gravity is not a physical object that can be located at the core of the Earth; rather, it is a fundamental force of nature that is caused by the mass of objects. The core of the Earth is predominantly composed of iron and nickel, and it is the immense mass of the Earth itself that generates the gravitational force we experience.

Gravity on Earth is a natural force that pulls objects towards the center of the planet. It is a fundamental force of nature that results from the mass of the Earth and all other objects in the universe, causing them to be attracted towards each other.

It's called 'gravity' everywhere on earth... Earths' gravitational pull is the basis for calculating other fields of gravity, with earth gravity being one unit, or 1G.

The force that stopped it is a resistive force. Assuming there are no external force acting on it, Friction is the cause.

When the ball is rolled, a force is applied. According to Newton's second law, F=ma, There is an acceleration, thus increase in velocity. At that same instance, when the ball moves, a natural resistive force, friction is produced. However at the next instance, there is no force pushing the ball, since friction exists when there is velocity, there will be a net force against the direction of travel. Thus generating a Deceleration. This happens till the ball comes to a stop, when it do not have any more speed. "Friction exists when there is motion" - this is a derivation from Newtons Third Law of motion. when the ball is moving it applies some force on ground so the ground also applies an equal and opposite force on the rolling ball. But since the vector component of the force on the ball that set it into motion is larger it keeps rolling till the time the Frictional force can bring it to an complete halt.

The magnitude of that force is printed on the front of every bag of sugar.

Look at it carefully, and you'll find markings like "1 lb" or "5 lb" or "10 lb".

That's code for the gravitational force exerted on that bag when it's full.

Unless your family prefers metric sugar. Then it gets a little more complicated,

because they use mass instead of weight (which is a type of force). To get

the force, multiply the mass printed on the bag in kg by about 9.8 m/s/s.

The answer will be in newtons, which unlike grams and kilograms are

force units.

The specific gravity of black sand can vary, but it is typically in the range of 2.5 to 3.5. This means that it is 2.5 to 3.5 times heavier than an equal volume of water. Black sand is often composed of minerals like magnetite and hematite, which are dense and contribute to its specific gravity.

Sediments carried by gravity are typically coarse-grained and unsorted. These sediments include boulders, cobbles, pebbles, and sand that are transported downhill by mass wasting processes such as landslides, rockfalls, and debris flows.

The direction of magnetic flux or lines of force is from north polarity to south polarity, and a compass needle will always align with that direction, wherever it is used. Since the magnetic polarity of the location we call Magnetic North is a south, a compass needle will point in that direction.

The apparent force of gravity on earth is not the same all over, the spin of the earth means that you weigh less at the equator than at the poles, due to the centripetal force from the earths spin. You will weigh about 0.3% less at the equator. If the earth spun faster still, this difference would be even more apparent.

Specific gravity is equal to the density of the iron ore divided by the density of water. The densities change with temperature, so I will assume a temperature of 4 degrees C for this calculation. At this temperature the density of water is 1000kg/m^3. There are various types of iron ore with varying densities. I found a reference table that states the density if iron ore ranges from 2100 to 2900kg/m^3. I will use the average: 2400kg/m^3. The reference table doesn't give a temperature, but oh well. I would choose 4 degrees C if I could. This gives us:

specific gravity=(2400kg/m^3)/(1000kg/m^3)

=2.4

Notice there are no units. This is a dimensionless parameter. It says iron is 2.4 times as dense as water. It will sink.

The largest tornado on record was the El Reno, Oklahoma tornado of May 31, 2013, which was at times 2.6 miles wide. As with any other tornado, it had absolutely nothing to do with the alignment of the stars or their gravity.

An object doesn't have a single, definite weight. Its weight depends on where it

is and what other masses are nearby, so it can change. You probably know that

whatever your weight is on the Earth, it would be only 1/6 as much on the moon,

so you're familiar with the idea that 'weight' can change.

The Earth has one weight from being 238,000 miles from the moon, and a different

weight from being 93 million miles from the sun.