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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

How much gravity is on Mercury in newtons?

The acceleration due to gravity on Mercury is approximately 3.7 m/s^2. To calculate the force of gravity (weight) in Newtons, one would multiply an object's mass in kilograms by the acceleration due to gravity (3.7 m/s^2).

What is the center of gravity of a rock of 8kg?

The center of gravity of a rock is the point where the force of gravity can be considered to act. For a symmetrical rock with uniform density, the center of gravity would be at the geometric center of the rock. So, for an 8kg rock, the center of gravity would be located at the halfway point between the top and bottom of the rock, vertically through its mass.

What is the specific gravity of nickel if 2.35 cm3 of nickel has the same mass as 20.9 mL of water at room temperature?

The specific gravity of nickel can be calculated by dividing the density of nickel by the density of water at room temperature. First, find the density of water by dividing its mass (20.9 g) by its volume (20.9 mL). Then, find the mass of 2.35 cm3 of nickel by multiplying its volume by the density of water. Finally, divide this mass by the volume of nickel (2.35 cm3) to find the density of nickel.

What is the force of gravity between two 74kg physics students that are sitting 85cm apart?

F = G M1 M2 / D2

G = 6.673 x 10-11 M3 Kg-1 Sec-2

M1 = M2 = 74 kg

D = 0.85

F = (6.673 x 10-11) x 74 x 74 / (0.85)2 = 0.000 000 505 76 newton

(about 0.000 001 82 ounce of force)

This calculation assumes that their centers of mass are 85cm apart, which

is quite cozy. If instead it's their elbows that are 85cm apart, then the force

between them is considerably less.

How fast does an object need to travel to defy gravity?

An object leaving the surface of the Earth would need to move at about 11.2 km

(7 miles) per second ... about 34 times the speed of sound!

If it did that, (and if there were no air dragging on it), then it could shut off the

rocket engines, and gravity could never pull it back to earth.

If the object is already some distance above Earth's surface, then the required

speed is less.

Does Mass and weight are related to one another through the effect gravity has on an object ture or false?

True. Mass and weight are related through the effect gravity has on an object. Mass represents the amount of matter in an object, while weight is the force of gravity acting on that object. Weight is directly proportional to mass and the acceleration due to gravity.

How do you unfreeze the touch screen on your samsung gravity t phone?

If the touch screen on your Samsung Gravity T phone is frozen, try restarting the device by holding down the power button until it reboots. If that doesn't work, you can also try removing the battery for a few seconds and then reinserting it to see if that resolves the issue.

What is Silver's Specific Gravity?

The specific gravity of silver is 10.49. This means that silver is 10.49 times denser than water.

Tiny stones made of calcium salts that roll in response to changes in gravitational pull are called?

Otoliths. These tiny stones are located in the inner ear and help animals maintain balance and orientation by detecting changes in gravity.

What is the formula 32 ft per second squared used for?

The formula 32 ft per second squared is used to represent the acceleration due to gravity on Earth. It is commonly used in physics calculations to determine the change in velocity of an object falling freely near the surface of the Earth.

What tool could be used to determine the area of a block?

You can use a tape measure to measure the length and width of the block and then multiply these two dimensions to calculate the area. Alternatively, you can also use a laser distance measuring tool for more accurate measurements.

What is the density of something that has a specific gravity of 1.15?

1.15 times the density of water, in whatever units you choose.

What happens to the peopleriversplants'sea if the earth stops moving?

If the Earth suddenly stopped rotating, people and objects would experience a sudden shift in momentum, causing devastating effects such as tsunamis, extreme weather patterns, and changes in gravitational pull. The rivers would also be affected, with water flow patterns disrupted and potentially leading to flooding or droughts. Plants and sea life may struggle to adapt to the abrupt changes in temperature, sunlight exposure, and water currents.

Where is the center of gravity in human body?

It varies from person to person and with the position the person is in at the time. For a person standing upright, it's usually somewhere in the vicinity of the navel.

Is gravity the greatest force on earth?

Yes, gravity is the force that governs the motion of objects on Earth. It is responsible for keeping objects grounded and controlling the orbits of celestial bodies. However, there are other forces at work such as electromagnetic forces and nuclear forces that also play important roles in various phenomena.

How does gravity cause fluid pressure?

Gravity creates a vertical pressure gradient within a fluid due to the weight of the fluid above a specific point. This pressure gradient causes the fluid to move from higher to lower pressure areas, thereby influencing fluid flow and distribution. In the case of bodies of water, gravity also contributes to hydrostatic pressure at different depths.

If an object is thrown in an upward direction from the top of a building 160 ft high at an initial speed of 21point82 mph what is its final speed when it hits the ground?

g = 9.81 m/s^2 , 160 feet = 48.768 metres, 21.82 mph = 9.754 metres/sec.

it passes top of building on way down at same speed so :

u = 9.754 m/s

v = ?

g = 9.81 m/s^2

s = 48.768 metres

if : v = square root of (u^2 +( 2 * g * s))

then : v = 32.434 m/s ( 72.55 mph )

Why are mass and weight used synonymously on earth?

Because on a bathroom scale, you often measure your 'weight' by pounds or kilograms. But really, it should be measured in newtons. Pounds and kilograms are used for mass. So you are really measuring your mass on a scale, not your weight.

What is better high or low gravity oil?

Each of them has advantages and benefits when it's used for different purposes in

different applications.

If one or the other was clearly better for all applications, then that's the one that

everybody would buy, and the other one wouldn't be manufactured or sold.

What do mass and gravity have in common?

The letter "a".

Other than the trivial answer above I'm not sure they can be said to have anything "in common". They're clearly related through the Law of Universal Gravitation, but that's not quite the same thing.

What force is anti gravity?

There is no force called "anti-gravity" in mainstream physics. Gravity is a fundamental force of nature that attracts objects with mass towards each other. Anti-gravity is a concept in science fiction that refers to hypothetical technologies or physical phenomena that could counteract or negate the effects of gravity.

How do you incerse the gravity?

Increasing gravity is not possible as it is a natural force determined by the mass of an object. Gravity can be simulated in various ways, such as using centrifugal force or creating environments with artificial gravity in science fiction settings, but these methods do not actually increase gravity itself.

What are the three main sources of gravity in our galaxy?

The three main sources of gravity in our galaxy are stars, dark matter, and gas clouds. Stars contribute a significant portion of the mass within the galaxy and thus exert a strong gravitational pull. Dark matter, which is invisible and comprises a large portion of the galaxy's mass, also contributes to gravitational forces. Gas clouds, although less massive than stars and dark matter, still have significant gravitational effects within our galaxy.

How are mass and weight measured when there is no gravity?

Objects always have mass whether they are in a gravity environment or not. Weight is determined by how much gravity there is.

You would take the mass and multiply by the gravitational constant of that environment. Earth is 9.8, the moon is 1.6 so you can see that your weight would be 1/6 on the moon as it is on earth.

If there is no gravity you can oscillate a spring, strap yourself to it, oscillate the spring again. Then do some fancy math to determine your mass. (saw it on a NASA video once)

Is it true that the gravity of all object big or small can be felt?

Yes, the gravity of all objects, regardless of their size, exerts a force that can be felt by other objects. The strength of the gravitational force depends on the mass of the object and the distance between objects.