9.81 m/s

3 What is the force of gravity between the earth and mass of 20 kg placed on its surface? [Ans. 196 N]

This law can be summed up with the equation F = ma, where F is the force, m is the mass of the object, and a is acceleration. Using this law, we can calculate the force of gravity of any object on the surface of the earth, using the known acceleration due to gravity.

The mass of an object refers to the amount of matter that is contained by the object; the weight of an object is the force of gravity acting upon that object.

9.8 m/s2

Mass– the amount of matter than an object is made of. Mass does not change with gravity. Weight– the amount of gravity acting on (pulling down on) an object (or mass). Gravity– a natural force that pulls objects downward.

A force is a push or a pull. Gravity exerts a force of attraction between any two objects. The more mass (matter) an object has, the more gravity it has. Weight is the measure of gravitational force acting on an object.

So, in general, low reps with heavy weight tends to increase muscle mass, while high reps with light weight increases muscle endurance. Lifting heavy weights builds muscle, but constantly upping the weight exhausts the body. The nervous system must also adjust to the new fiber activation in the muscles.

Volume is dependent on pressure, i.e., the same mass will have a greater density if it is compressed to a smaller volume because it makes the denominator of the density equation smaller. Gravity is a force that can compress matter, so the answer to your original question is YES, gravity does affect density.

Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth’s gravity comes from all its mass.

The Earth’s Moon has considerably less mass than the Earth itself. Not only is the Moon smaller than the Earth, but it is only about 60 percent as dense as Earth. Thus, the gravitational attraction on the Moon is much less than it is here on Earth, and a person weighs less on the Moon.

The Moon’s surface gravity is weaker because it is far less massive than Earth. A body’s surface gravity is proportional to its mass, but inversely proportional to the square of its radius. “Weight” measures the gravitational attraction the planet exerts on your body.

Although you can jump very high on the moon, you’ll be happy to know that there’s no need to worry about jumping all the way off into space. In fact, you’d need to be going very fast – more than 2 kilometres per second – to escape from the moon’s surface.

1.62 m/s²

So when the moon formed, it formed like a planet. Though volcanic activity on the moon ended about 3 billion years ago, the Apollo missions picked up thousands of earthquakes on the moon, or moonquakes. Moonquakes tell us that the moon is not geologically dead. It’s still acting like a planet today.

The Moon is the only extraterrestrial body for which we have samples with a known geologic context. A handful of lunar meteorites have been recognized on Earth, though their source craters on the Moon are unknown….Elemental composition.

Diamonds are common in highly shocked ureilites, and most are thought to have been formed by either the shock of the impact with Earth or with other bodies in space. However, much larger diamonds were found in fragments of a meteorite called Almahata Sitta, found in the Nubian desert of Sudan.

There, a type of material called kimberlite magma forces its way up from deeper in Earth’s mantle, cracking the solid rock. As it rises, the magma collects fragments of rocks, like floodwaters picking up silt and gravel. Some of these fragments contain diamonds.

In these meteorites, called SNCs, many important elements have been detected. Magnesium, Aluminium, Titanium, Iron, and Chromium are relatively common in them. In addition, lithium, cobalt, nickel, copper, zinc, niobium, molybdenum, lanthanum, europium, tungsten, and gold have been found in trace amounts.

Breathing on Mars Without a pressure suit, no amount of breathable oxygen delivered by any means will sustain oxygen-breathing life for more than a few minutes. In these conditions humans die within minutes unless a pressure suit provides life support.