Matter, energy, space, time and gravity

In summary, matter is anything that has mass and takes up space in the solid, liquid, or gas state. Energy is the ability to do work and comes in various forms like light, heat, and electricity. Space is the three-dimensional extent where objects and events occur, often referred to as the universe. Time is a measure of the duration of events and is linked to the concept of space as the fourth dimension. Gravity is the force of attraction between objects with mass, dependent on the object's mass and distance, and is responsible for keeping planets in orbit and holding us to the Earth's surface.
  • #1
Dremmer
92
0
Are these five different things or are they just variations or properties of the same thing?
 
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  • #2
They are different things (which is the reason why they have different names).
Their interaction is the topic of physics.
 
  • #3
Matter is the only one of these that we can perceive directly. We cannot perceive energy, gravity, space or time directly.
 
  • #4
We do not perceive matter directly, we perceive nothing directly.
 
  • #5
Mathematical model that combines space and time is Spacetime that curves (gravity) in presence of matter (mass/energy).
 

1. What is matter?

Matter is anything that has mass and takes up space. It can exist in three states: solid, liquid, and gas. Examples of matter include rocks, water, and air.

2. What is energy?

Energy is the ability to do work. It can come in many forms, such as light, heat, and electricity. Energy is constantly being transferred and transformed, but it can never be created or destroyed.

3. What is space?

Space is the three-dimensional extent in which objects and events occur. It is often referred to as the universe, and it contains all matter and energy.

4. What is time?

Time is a measure of the duration of events. It is often described as the fourth dimension, and it is relative to the observer's frame of reference. Time is a fundamental aspect of the universe and is often linked to the concept of space.

5. How does gravity work?

Gravity is a force of attraction between objects with mass. The more massive an object is, the stronger its gravitational pull. Gravity also depends on the distance between objects, with the force decreasing as the distance increases. This force is what keeps planets in orbit around the sun and holds us to the Earth's surface.

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