Symptoms and causes. Symptoms. Most muscle cramps develop in the leg muscles, particularly in the calf. Besides the sudden, sharp pain, you might also feel or see a hard lump of muscle tissue beneath your skin. Muscle cramps usually disappear on their own and are rarely serious enough to require medical care. However, see your doctor if your cramps:
Because Philippines is an English word (other countries have other spellings - for example Filipiny). Filipino starts with an F because they're named after the Spanish king Filip II. AND, the local spelling here is Pilipino. The name Philippines and its Spanish counterpart, Filipinas, are derived from the name of King Phillip II.
The f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography. It is also known as the focal ratio, f-ratio, f-stop, or relative aperture. The f-number is commonly indicated using a hooked f with the format f/N, where N is the f-number.