Example image of eyePlorer eyePlorer map for 'Scalar (physics)': Coordinate system Lorentz transformation Physical quantity Physics Euclidean vector Number Product (mathematics) Quantity Units of measurement Orthonormality Metric (mathematics) Charge (physics) Electric potential Mass Temperature Direction (geometry) Distance Force Gravitation Magnitude (mathematics) Speed Velocity Charge density Electric charge Theory of relativity Current density Energy density Pressure Stress-energy tensor Improper rotation Proper length Proper time Pseudoscalar Pseudovector Triple product Magnetic monopole Central force Foot-pound (energy) Graviscalar Isoscalar Linear entropy Lorentz scalar Metre per hour Metre per second Optical scalars Outline of energy Rotation of axes Top quark condensate Weyl scalar Advection