Blog

Refine Search

What are some facts about light energy?

Electromagnetic energy, also called electromagnetic radiation, is the flow of photons through space. Photons are the quanta of light, which means they are the smallest possible unit of light. Photons always move at the speed of light, which is approximately 186,000 miles per second. Electromagnetic radiation moves in a wave pattern and exists in a spectrum of different types of energy that correspond to different wavelengths. One of the wavelengths is called visible light because it consists of all the colors visible to humans. The other wavelengths of electromagnetic energy correspond to othe..

Continue Reading

What happens if you don't have enough vitamin C

Also referred to as ascorbic acid, vitamin C plays an important role in the health and repairing of different body tissues, tendons cartilage, teeth, skin and bone. Vitamin C is required in the body to make collagen, which repairs the body tissues. The symptoms of scurvy include pain the joints and muscles, weakness, bleeding and easy bruising. People who experience vitamin C deficiency can use supplements vitamin C foods to treat the condition, as noted by Patient.

Continue Reading

What does the F2 key do?

For instance, Alt + Ctrl + F2 can be used to open the document window in Microsoft Word, while Ctrl + F2 opens the print preview window.\nIf a file or folder is selected, F2 can be used to rename it. F2 is also among the keys that can be used to enter CMOS during the startup process.\nIn Linux systems, F2 used with specific key combinations can accomplish various functions. For instance, Ctrl + Alt + F2 switches between text consoles while Alt + F2 is a shortcut for many things, most notably quitting a hanging program.

Continue Reading

Are there actually cats that roam Disneyland at night?

Disneyland officials seem to have fully embraced the feline presence in the park, but they seem hesitant to make official statements about their unofficial, non-human pest control staff. Still, park visitors frequently photograph the cats.There is a certain amount of public fascination with the Disneyland cats. Actor Ryan Gosling, a former Mouseketeer, has spoken publicly about his apparent belief that Disney breeds these cats with special abilities, making them into "commandos" that patrol the park. There's no indication that this exact scenario is true, but the presence of the cats is c..

Continue Reading

What were some of the diseases Columbus' journey brought to America?

Most of the diseases brought to the Americas by Europeans were highly contagious and spread rapidly among the Native American population, even in cases in which the affected groups had no direct contact with Europeans. Smallpox, a disease for which a significant number of Europeans had already developed an acquired immunity, was the deadliest of the new diseases brought to the American shores. A comparatively much greater loss of life from smallpox occurred among Native Americans than the fatalities suffered by Europe during the widespread bubonic plague, known as the Black Death.Yellow fever ..

Continue Reading

What are the roots of professional football?

The significance of the 1869 game in establishing football as a professional sport is tied to the first time a member of a team was paid. Until this time, athletes were considered amateurs and weren't expected or allowed to receive money for their performances.Almost 80 years after the game a receipt was discovered documenting a payment of $500 to a member of the Allegheny Athletic team and professional football could be traced to its roots.

Continue Reading

What causes hamstring pain?

Hamstring injuries are graded 1, 2 or 3 depending on severity, explains SportsInjuryClinic.com. Grade 1 consists of minor tears in the muscle. Grade 2 is a partial tear. Grade 3 indicates a completely ruptured or torn muscle. Clinicians perform a series of tests to determine the severity of the injury, including a straight leg raise to determine range of motion, resisted knee flexion, a slump test and palpation. Minor hamstring pulls usually heal without treatment, says WebMD. To ease pain and speed healing of minor injuries, the muscle should be rested and crutches should be used to avoid put..

Continue Reading

What is a good traditional Greek dressing recipe?

The olive oil is the dominant ingredient in a Greek salad dressing, and the rest of the dressing is essentially filled out by the addition of the red wine vinegar and a small amount of Dijon mustard. Various ingredients such as garlic, oregano, salt, pepper and basil are very important to the mixture, but they are considered seasonings, and their presence is highly variable in different recipes.\nOne of the most popular ingredient additions to a Greek salad dressing is lemon juice, either from a bottle or freshly squeezed from a ripe lemon. Another common ingredient substitution is switching o..

Continue Reading

What damage can occur from falling on one knee?

The knee is the largest joint in the body, with the upper and lower bones of the knee being separated by the kneecap and two disks called menisci. The femur, the upper leg bone, and the lower leg bones, called the tibia and fibula, are connected to the kneecap by ligaments, tendons and muscles. Fractures to any of the bones of the knee can cause pain, swelling and bruising, and can affect the functioning of the joint, states WebMD. Pain in the injured knee can increase when the area is moved or pressure is applied.\nThe kneecap can become dislocated as the result of a fall, a type of dislocati..

Continue Reading

What is a working product activation code for Microsoft Office 2003?

To locate a lost product activation key, users can download and install a key-finding program such as Keyfinder Thing. Once installed, this program searches the Windows Registry to find, decrypt and display the user's unique product activation key. Alternatively, users may purchase new copies of Microsoft Office, which come with new unique product activation keys. However, as of 2015, Microsoft no longer sells nor supports Office 2003, so the software may be difficult to find.

Continue Reading
Showing 1571 to 1580 of 10000 (1000 Pages)