Gravity

Specific gravity relative to what? I assume you mean water.

Bromine has a density of 3.11 gm/c^3, which is 3.11 times that of water. That could work for whatever you are doing.

gravity is something that holds you down, anti-gravity is when you have no weight.

Or to say it another way -- Gravity is real it exists in this universe. anti-gravity is fictitious it only exists in the imagination.

Edit: Gravity is the universal attraction between massive objects. As postulated by Einstein it is a positive warpage of space-time by energy densities (recall mass / energy equivalency). Anti-gravity would be just the opposite; a negative warpage of space-time brought on by an energy density less than zero. This negative "mass" would appear to be repulsive to ordinary bodies.

Vacuum itself does not have gravity. In a vacuum, there is an absence of matter and gas particles, so there is no medium for gravity to act upon. Objects in a vacuum are subject to the gravitational pull of nearby massive bodies like planets or stars.

Gravity is a natural force that exists between any two objects with mass. It is described by the theory of general relativity proposed by Albert Einstein, which posits that gravity is a result of the curvature of spacetime caused by mass and energy. In other words, gravity is not controlled by any external force or mechanism, but rather is an inherent property of mass and its interaction with spacetime.

The force increases by a factor of 4. If we're talking about gravity, the gravitational force is a function of the masses and the square of the distance between them. As distance decreased by a factor of 2 (since it was cut in half), then the force increases by a factor of 2 squared, and that's 4. Gravitational force increases by a factor of 4 when distance between two gravimetrically attracted objects is decreased by a factor of 2 (cut in half).

A mass structure can have only one center of gravity, which is the point where the entire weight of the structure is considered to act. This point represents the average location of the mass distribution of the structure.

Because (1) It extends to arbitrarily long distances, unlike some other forces. (2) Unlike electricity and magnetism, which also extend to arbitrary distances, it is always attractive. The result is that the (tiny) contributions of lots of individual particles contribute to one great force.

The force of a sun's gravity can decrease as it's mass decreases as it's hydrogen is converted into energy, and the gravity of a sun large enough can increase if it supernovas and then collapses in on itself to form a black hole, but gravity on earth can't really change unless there is some cataclysm, such as the earth being broken into pieces by a collision with another world or something to change it's mass.

No. Forces always come in pairs. When gravity pulls you and the earth together there are two forces. The earth pulls on you and you pull on the earth. However, because you have so much less mass, you move lots. The earth being so massive moves very little. Are you familiar with F=ma? Or, more useful here a = F/m. The F (force) is the same on both you and the earth, but you are dividing by very different m's so you get very different a's.

Dilute gravity refers to a situation where the effects of gravity are weak, such as in regions where the gravitational field is low compared to standard conditions on Earth. This can happen at extreme distances from massive objects like planets or stars, where the gravitational pull is significantly reduced.

The answer is relative to what you are throwing, a half deflated helium balloon might stay up for 6 seconds with the slightest throw, whereas a 5 pound weight would have to be hurled pretty hard to have the same hang time. What you really want to research is terminal velocity to find your answer

Gravitation, or gravity, is one of the four fundamental interactions of nature (along with the strong force, electromagnetism and the weak force), in which objects with mass attract one another.

The vestibular system within the inner ear provides information to the brain about the body's position with respect to gravity. This system includes structures that detect head movements and changes in head orientation, helping to maintain balance and posture. The signals sent by the vestibular system contribute to our sense of spatial orientation and help in coordinating movement.

Yes. Objects deeper in a gravity well see things further away as moving faster; likewise, objects far away see objects deep in the well moving more slowly.

This has real consequences here on Earth: a plane flying high in the sky is in a shallower region of Earth's gravitational well, while a ground station is deeper. We can place perfectly synchoronized clocks on the station and on the plane, and send the plane round the world, and actually see that the clocks have shifted out of sync.

Gravity is the weakest of all the interactive forces and cannot be easily described by mathematics in the same way as electromagnetism and the strong and weak nuclear forces. Currently, physicists cannot fully explain why gravity is so incredibly weak in comparison to other forces.

Gravity is a force that pulls two objects together.

Gravity exists between two objects that have mass.

Gravity exists in the whole universe

two masses involved- weight and mass and the distance.

The ball experiences greater air resistance when it is going faster due to increased drag force. This is because at higher speeds, there is more air flowing past the ball, leading to a larger resistance force acting in the opposite direction of its motion.

The quick and dirty: Because the points along the equator are the earth's surface points, generally speaking, that are farthest from the axis of rotation. It is similar to this idea. Imagine that you are spinning a bicycle wheel on its axle. Points along the tire surface are moving more rapidly than points on a spoke very close to the axle. The points on the tire are covering a longer distance over the same period of time.

Gravity bends time,space and light, so the first thing that's certain is that we won't see stars because their light bends around earth.

Light from stars would reach our planet even if the force of gravity increased by a factor of a thousand. The curving of a path of light by mass is inward TOWARDS that mass.

The main effect would be that everything would weigh more -- animal, vegatable, and mineral. Animals without sufficient muscle strength to overcome the increased weight would not be able to move. Plants and rock formations that could not sustain the added weight would fall to the surface.

The perception of the pull of gravity and linear acceleration is the result of the forces acting on objects. Gravity causes objects to be attracted to the center of mass of another object (like the Earth), while linear acceleration results in a change in an object's velocity over time. These forces can be felt by objects and cause them to move in a predictable manner.

The easiest experiment to measure gravitational field strength is to use a simple pendulum. By measuring the period of oscillation of the pendulum, you can calculate the gravitational field strength based on the known length of the pendulum and the formula for the period of a simple pendulum.