Gravity

Einstein's view of gravity is built upon Newton's but extended to some special situations where Newton's Laws (postulations?) have been shown or suggested not to apply. In particular in the presence of extremely high gravitational forces such as occur close to a black hole and as velocities approach the speed of light.

As good as. If you weigh 100 lbs on earth, you would weigh 16.54 lbs on the moon. One sixth of 100 equals 16.6666.... Close enough.

Yes. Gravity doesn't depend on the presence of air, water,

jello, or anything else. None of them makes any difference.

Groundwater is primarily replenished by precipitation infiltrating into the ground. Gravity does play a role in how groundwater moves through the subsurface, as it causes the water to flow downward due to the force of gravity, but it is not the primary power source for groundwater.

Gravity declines as a function of the square of the distance from a mass. Earth's gravity is less and less as one goes further away, but is never zero. A quarter of a million miles from earth, gravity is still strong enough to hold the moon. Earth has very tiny affects on the orbits of Mars and Venus, millions of miles away.

About four million miles away from earth, gravity is about one millionth that at the surface. A 200 pound man would feel a weight of just 1/5000 pound or about the weight of a grain of sand at the surface.

There are areas of space near the Earth (and every gravitationally significant object in the solar system, such as other planets and significant moons) in which the effects of Earth's Gravity are balanced against and neutralized by (and equivelantly neutralizing) the effect of the Sun's gravity, enabling an object to 'hover' at a fixed point relative to earth instead of having to maintain an orbit. These are called Lagrangian points.

The distance between two masses is directly proportional to the gravitational force between them. For example, the further you are from Earth's surface, the weaker Earth's gravitational force is on you.

Source: high school physics

The strength of the gravitational forces between the Earth and

an object on or near it is called the "weight" of the object.

In reality, there are two equal and opposite forces going on. The Earth

attracts the object toward it, with a force that is the weight of the object

on Earth. At the same time, the object attracts the Earth toward it, with

a force that is the weight of the Earth on the object.

The forces are equal. When the object is our body, we obsess about the

first one. Nobody ever talks about the second one.

We can calculate the gravity on any planet or star by using this formula

g = GM/r2

where

M is mass of the planet or star

G is universal gravitational constant

g is acceleration due to gravity & r is the radius of the planet or star.

Mass of Jupiter is 1.9 X 1027 kg

Radius of Jupiter is 7 x 107 m

Putting the values in formula we get

g = (6.673 x 10-11) x (1.9 x 1027)/(7 x 107)2

= 26m/s2

Gravity causes the body to accelerate towards the ground, while air resistance opposes this motion by pushing against the body as it falls. The interaction between gravity and air resistance determines the overall speed and trajectory of the falling body.

Gravity is essential for keeping us grounded on the Earth, enabling objects to have weight, and keeping our planet and solar system in balance. It also plays a crucial role in important phenomena such as tides, orbits, and the formation of galaxies. Without gravity, life as we know it would not exist.

Gravity is the force that pulls objects with mass towards each other. It affects all objects with mass, causing them to attract one another. The strength of gravity between two objects depends on their mass and the distance between them.

It depends on the size of the container holding the air. If a container is bigger, it

will need more air to reach 150 psi. If a container is smaller, it will need less air to

reach 150 psi.

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HONK ! Beulah the buzzer is upset with that concept.

Put any amount of air you want into the container, and seal her up good and tight.

No matter how much or how little air is in there, and no matter what the inside

volume of the container is, I can bring it to 150 psi, or to any other pressure you

choose, by adjusting the temperature of the container and its contents. You want

more pressure ? Just heat the container. You want less pressure ? Just cool it and

the pressure will drop until the air inside freezes. Works with any gas.

If you want to know the weight of a sample of air, you have to specify the mass.

If you don't know the mass, then we need the pressure and the temperature.

Lacking either of those figures, the weight could be anything.

Planes stay in the air due to the principles of aerodynamics. The wings of the plane create lift as they move through the air, counteracting the force of gravity pulling the plane down. This balance allows the plane to stay airborne.

Earth's moon is roughly 1.2% the mass of earth.

To allow air to flow into the can while you drink out of it, preventing a vacuum from forming and making it easier to pour. The second hole creates a smooth pour by reducing the glugging sound as the liquid flows out.

The variables that affect friction include the types of surfaces in contact, the force pressing the surfaces together, the roughness of the surfaces, and the presence of any lubricants or contaminants.

Mountain climbers use a combination of techniques and equipment to manage friction and overcome gravity while climbing. They rely on proper technique, using their hands and feet to maintain contact with the rock surface, as well as specialized equipment like ropes, harnesses, and anchors to provide security and support in challenging terrain. Eliminating friction entirely would be difficult and dangerous, so climbers focus on minimizing it through proper technique and using equipment effectively.

Without gravity, life as we know it would be drastically different. Objects would float around randomly, making it difficult to move or interact with our environment. Our bodies and biological processes have evolved to function in a gravitational environment, so without it, we would likely struggle to survive.

The force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This relationship is described by Newton's law of universal gravitation: F = G * (m1 * m2) / r^2, where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

If the lamina is in two dimensions (i.e. not curled round into a third dimension) then the centre of gravity will be somewhere within the flat shape. The position of the centre of gravity will depend on the distribution of mass across the lamina.

If the lamina is curled round into a third dimension then the centre of gravity will be somewhere within the volume enclosed, fully or partially, by the lamina; this may or may not be on the lamina.

Some forces around the house include gravity acting downwards, friction between surfaces, tension in strings or wires, and compression in structures like walls and floors. These forces are constantly at play, influencing how objects move and interact within the household environment.

None of the statements on the list that accompanies the question is incorrect.

The gravitational acceleration at the surface of the Earth is 9.8 meter per second per second. To convert between weight (in Newtons) and mass (in kilogram) a factor of 9.8 (or roughly 10) is required.