It's in the middle of the cell, and houses the chromatin.

Part of homeostasis. Sweat cools off the body by exerting waste through sweat glands. The body gets rid of the stuff we don't need, and cools the body off at the same time.

Black holes are formed as a result of a whole lot of matter being condensed to extreme conditions. Super-massive black holes are formed as a result of stars going super-nova, and then collapsing under their own weight. Microscopic black holes are formed as a result of high energy particles colliding with one another. For example, … Read more

It's the atmosphere reflecting the light. Blue is the shortest wavelength.

Velocity is the speed and direction on an object. Most commonly the term "velocity" is used to describe the speed of an object. For example, a car might have a velocity of 5 m/s. That means that the car's speed is 5 meters per second. It's really just a fancy word for "speed" used in … Read more

Physics is basically the study of matter and energy, as well as forces and motion. It is truly a universal science. Physics applies to pretty much anything you can think of.

There are an estimated 750,000,000,000,000,000 solar systems throughout the entire visible universe. It makes sense logically and mathematically that we're not the only carbon-based life forms in the universe. It would be nearly impossible that we are seeing as how vast space really is.

As for the theory that aliens are visiting Earth, that's … Read more

The moon landings were perhaps the best documented events in human history:

• hours of footage
• thousands of pictures
• nearly a half ton of moon rocks
• millions of eye witnesses

There is no reason to think that they were faked, or that someone landed on the moon before Armstrong. The only two countries that had a space program in the … Read more

Well, molecules are made of atoms. An atom is the smallest singular object. A molecule is the collection of two or more atoms.

• mass
• color
• temperature
• density
• volume
• weight
• smell

Pretty much anything you can think of that has to do with its physical appearance.

An alloy is basically a solid mixture of two or more different elements.

There are magnesium alloys, titanium alloys, nickel alloys, zinc alloys and copper alloys. For example, brass is an alloy of copper and zinc.

If you know the figures of the distance between the Earth and the moon, and the speed of light, it isn't that difficult to figure out:

Distance: 239,000 miles
Speed of Light = 186,000 miles per second

Time = Distance/Rate

Time = 239,000 / 186,000
… Read more

It's all due to gravity, and inward pulling force, and pressure, and outward pushing force. What happens is all the matter is being pulled into the core or center as a result of gravity, which is created by mass. Remember Newton's 3rd law! Pressure, a pushing force, is created as a result. So we have … Read more

There are a whole bunch of answers to this question that vary greatly. In many cultures, the beginning is a mythological story. The two most commonly accepted theories along the average person would be:

• The Big Bang Theory: The idea that all energy in the universe was once confined to a singularity, and … Read more