Gal (unit)

The gal, sometimes called galileo, (symbol Gal) is a unit of acceleration used extensively in the science of gravimetry. The gal is defined as 1 centimeter per second squared (1 cm/s²). The milligal (mGal) and microgal (µGal) refer respectively to one thousandth and one millionth of a gal.

The gal is not part of the International System of Units (known by its French-language initials "SI"). In 1978 the CIPM decided that it was permissible to use the gal "with the SI until the CIPM considers that [its] use is no longer necessary." However, use of the gal is deprecated by ISO 80000-3:2006.

The gal is a derived unit, defined in terms of the centimeter-gram-second (CGS) base unit of length, the centimeter, and the second, which is the base unit of time in both the CGS as well as the modern SI system. In SI base units, 1 Gal is equal to 0.01 m/s².

The acceleration due to Earth’s gravity (see Standard gravity) at its surface is 976 to 983 Gal, the variation being due mainly to differences in latitude and elevation. Mountains and masses of lesser density within the Earth's crust typically cause variations in gravitational acceleration of tens to hundreds of milligals (mGal). The gravity gradient (variation with height) above Earth's surface is about 3.1 µGal per centimeter of height (6994310000000000000♠3.1×10⁻⁶ s⁻²), resulting in a maximum difference of about 2 Gal (0.02 m/s²) from the top of Mount Everest to sea level.

Gal (1969 album)

Gal is the second album by Brazilian singer Gal Costa, released months after the first album Gal Costa.

Track listing

References

General Aircraft GAL.56

Please

Please is a polite expression of request.

Other meanings of please include:

Please may also refer to:

Music

Albums

Songs

Please (Matt Nathanson album)

Please is the debut album by Matt Nathanson, released in July 1993 on Acrobat Records.

Track listing

References

Official Site

Please (Pam Tillis song)

"Please" is a song recorded by American country music artist Pam Tillis. It was released in December 2000 as the first single from the album Thunder & Roses. The song reached #22 on the Billboard Hot Country Singles & Tracks chart. The song was written by Jeffrey Steele, Michael Dulaney and John Hobbs.

Chart performance

References

Degree

Degree may refer to:

As a unit of measurement