# Physical Science

By: Ernest Capraro
1 meter = 3.280839895... feet. You can calculate this amount yourself, as well as other conversions between units if you know a few basic factors.1 inch = exactly 2.54 centimeters, by definition.100 cm = 1 m, also exact, by definition12 inches...
 By: Jimmy Nightingale The Potato ConspiracyLast night I saw an alien. My wife did too. She calls them 'potato men' on account of their uncanny resemblance to certain tuberose vegetables. Well, perhaps you need to squint a little to appreciate the likeness but there is no denying the...
How scientists know that water was once on Mars
By: Nancy Houser
An interest in Mars began in the 1870s with the Italian astronomer, Giovanni Schiapparelli, who used a telescope to observe the Martian canals. After that an amateur astronomer and American businessman by the name of Percival Lowell founded an Arizona observatory, where his own observations...
Exploring the ozone layer
By: Wanderer
Ozone in Two PlacesThe type of oxygen we are familiar with is diatomic oxygen, O2, the one we breathe. There is another molecular form of oxygen known as ozone, given by the chemical formula O3. It is now common to hear about the hole in...
By: Shawn Vilmaire
Electronics has certain basic components that can be found in almost all circuits. The Resistor, the Capacitor, and the inductor are the most common components found in most simple circuits. We will be focusing on the resistor and its equations in a series DC circuit...
By: Ernest Capraro
The basic formula used to define force is: Force = mass x acceleration. Using S.I. units, mass has units of kilograms (kg) and acceleration is meters/second squared (m/s2). That gives force units of kg*m/s2, which are a bit awkward to work with. Instead...
By: Ebey Soman
Acids can be defined several ways. The most commonly used definition is the Arrhenius definition. An acid is a compound that releases H+ ions in solution.According to the Arrhenius definition, a base is a compound that releases OH- ions in solution.When an acid...
Exploring levitation
By: Ann Albanese
There are so many stories about people who have the ability to rise into the air. Some have been said to be blessed and others were possessed. Levitation is a phenomenon of psychokinesis (PK) in which objects, people, and animals are lifted into the air...
By: Timothy Root
There is actually a new show called the big bang theory, it is really hard to watch, watching this show is like having a headache but you know what the ironic thing is, the show is funny.The problem is, most people do not want...
By: Ernest Capraro
A projectile is any object that, once set into motion, has no forces acting upon it other than gravity (and air resistance, though we ignore it whenever possible). A projectile will follow a parabolic path until it hits something (at which point another force acts...

1 91 92 93 94 95 547