A 60.-kilogram physics student would weigh 1560 newtons on the surface of planet X. What is the
magnitude of the acceleration due to gravity on the
surface of planet X?

26m/s²

Explanation:

Given parameters:

Mass of the student  = 60kg

Weight  = 1560N

Unknown:

Acceleration due to gravity  = ?

Solution:

Weight is a force on a body due to gravity;

  Weight  = mass x gravity

Insert the given parameters and solve;

    1560  = 60 x gravity

    Gravity  =   = 26m/s²

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.