# Physics Scalar

Jun 17th, 2015
Studypool Tutor
Price: \$10 USD

Tutor description

- is a simple physical quantity that does not depend on direction, and is therefore not changed by coordinate system rotations (in Newtonian mechanics), or by Lorentz transformations (in relativity).

Word Count: 637
Showing Page: 1/5
Scalar - is a simple physical quantity that does not depend on direction, and is therefore not changed by coordinate system rotations (in Newtonian mechanics), or by Lorentz transformations (in relativity).Examples:For example, the distance between two points in space is a scalar, as are the mass, charge, and kinetic energy of an object, or the temperature and electric potential at a point inside a medium. On the other hand, the electric field at a point is not a scalar in this sense, since to specify it one must give three real numbers that depend on the coordinate system chosen. The speed of an object is a scalar (e.g. 180 km/h), while its velocity is not (i.e. 180 km/h north). The gravitational force acting on a particle is not a scalar, but its magnitude is.Examples of scalar quantities in Newtonian mechanics:electric charge and charge densitymass and mass densityspeed, but not velocity or momentumtemperatureenergy and energy densitytimepressureentropynegentropyVector - is a concept characterized by a magnitude and a direction, and which sums with other vectors according to the Parallelogram law. A vector can be thought of as an arrow in Euclidean space, drawn from an initial point A pointing to a terminal point B. This vector is commonly denoted by indicating that the arrow points from A to B. In this way, the arrow holds all the information of the vector quantity the magnitude is represented by the arrow's length and the direction by

## Review from student

Studypool Student
" The best tutor out there!!!! "

1828 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors