answersLogoWhite

0

🧪

Gravity

One of the four fundamental interactions, gravity is responsible for the fact that any objects with mass attract one another. According to general relativity, it is a space time curvature, but according to quantum mechanics it is the result of exchanges of virtual gravitons.

4,784 Questions

What do you mean by relative density?

Use a container of a particular size (say 1 cubic metre) fill with water and weigh.

The weight (mass) = 1000 kg, so density of water = 1000 kg per cubic metre

>

Repeat with iron = 7850 kilograms, so density = 7850 kg per cubic metre

For the same volume iron is 7.85 times the mass of water

So iron is 7.85 times the density of water

Relative density is the density of a material compared to the density of water.

Why does the sun have the most gravity in your solar system?

The sun, by far, has more mass than anything else in the solar system. The sun contains 99.86% of the mass in the solar system.

What makes a broom stand on its on?

A broom can stand on its own when the bristles are balanced in such a way that the center of gravity is directly over the base. This creates a stable equilibrium that allows the broom to remain upright without falling over.

Does gravity act on marbles?

Yes, gravity acts on marbles just like it does on all objects with mass. The force of gravity pulls the marble towards the center of the Earth, causing it to fall when dropped or roll downwards on an inclined surface.

How does gravity allow a parachute to go up into the air?

Gravity pulls the parachute down towards the ground. When the parachute catches air as it falls, it creates air resistance that slows down the descent, allowing the parachute to glide gently to the ground. So gravity doesn't make the parachute go up into the air, but rather helps control its descent.

What planets gravity is one-fourth the gravity of earth?

Of the planets in our solar system, Mars has the lowest surface gravity of around 38% of earths - over one third. This comes closest to the 25%. We then have moons and dwarf planets, but these have much lower surface gravities.

What will happen to value of g if compound pendulum is taken nearer to the centre of the earth?

The acceleration of gravity decreases as the observation point is taken

deeper beneath the surface of the Earth, but it's not the location of the

compound pendulum that's responsible for the decrease.

Which attributes does the exosphere have?

The answer wanted is surely high temperature and low gravity.

The exosphere is considered to have high temperature because the individual gas molecules of which it is composed are moving fast. However there are very few of them and any solid object in the exosphere will have high temperatures in sunlight and low temperatures in the shade. Gravity is lower than on the surface of the earth. Gravity is inversely proportional to the square of the distance - so an object at 3,500 mile altitude will only feel one quarter of the pull of the same object on the surface.

Why is gravity important in the real world?

Gravity is important in the real world because it keeps our feet on the ground, holds the planets in their orbits around the sun, and affects the flow of water, air, and other natural processes on Earth. Without gravity, life as we know it would not be possible.

How does gravity affect planetary motion?

The mutual gravitational forces that attract a planet and the sun to each other

are responsible for keeping the planet in orbit around the sun.

What evidence proves that gravity is a force at a distance?

We observe planets, moons, comets, and artificial satellites and space probes

moving in relation to the central body within their orbits exactly as we would

expect them to move if the theory of universal gravitation is true.

This evidence supports the theory of force at a distance due to universal gravitation, but

doesn't prove it. It's still "only a theory", which can never be proven, but can be disproven

in half-a-second if we ever see a situation where it's not working that way.

What would happen if the earth's gravity doubled?

A lot of plants and animal could possibly die because of the added weight, building may collapse and people may live through it and eventually adapt to the change as would any other surviving plants and animals.

Why is it the boat is not sinking if the earth has a gravity?

This is simply because of the weight of the water versus the weight of the boat.

The water push upward with a force equal to the weight of the water the boat push away.

It is self stabilizing. The deeper the boat lie, the more water it push away, and the more will the water push back at the boat.

Of course, if you fill the boat, then it will most likely sink, but here again it depends on what material the boat is made of.

If the total volume of materials in boat weigh less than equal volume of water, the boat will still be floating.

How does Fighting Gravity fight gravity?

In order to fight, overcome, prevail, defeat, and triumph over gravity,

you must provide a force greater than it in the direction opposite to it.

Exactly like you do with your arm muscles when you pick up a book from

the table, or with your leg muscles when you walk up some stairs. It's a

ferocious battle against gravity, but you win every time.

Which axes does time and distance place?

Conventially, time is on the x or horizontal axis, distance on the y or vertical axis, the slope of the graph at any point represents the velocity at that point.

How can you calculat the specific gravity of air?

You could measure the weight of a recipient with air, and compare it to one without air (with a vacuum instead).

How does Gravity shape earth?

Originally earth was a weightless liquid blob, which will default to a spherical shape,

add to this the rotation and centripetal swelling at the equator which flattens the poles, then after cooling and solidifying, this pretty much is earth today.

What is the force of gravity on the mass of 0.5 kg hanging on a string in a beaker of water?

The force of gravity acting on it is 4.9 newtons (1.102 pounds), provided the beaker

is in a lab on Earth.

We don't know the buoyant force on it, because we don't know its volume.

Whatever its volume is, you can subtract the weight of an equal volume of water,

and the result is the tension in the string.

What is the center-of gravity for a spherical object?

The center of gravity for a spherical object is located at its geometric center, which is also the center of the sphere. This point is equidistant from all points on the surface of the sphere, making it the point where the force of gravity can be considered to act.

What is the upward force that works against gravity?

Any upward force works against gravity,

since they act in opposite directions.

Does weight vary according to the force of gravity?

yes as the wight is directly proportional to gravity.

In fact, weight itself is a force, as force is F=ma, such as weight on earth (or F) is a persons mass times the acceleration due to gravity on Earth (9.8 m/s2), and the force due to gravity changes depending where you are sense force due to gravity is F=G(m1m2/r2). So changing the mass of the planet changes the "weight" (aka force)