In May 2019, the kilogram was redefined for the first time in 130 years. It will now be redefined as a fundamental property of nature, called what?

(A) Planck's constant

(B) electrical constant

(C) Gravitational constant

(D) magnetic constant

Three of the fundamental constants of physics are the speed oflight, c= 3.0 x 10^8 m/s, the universal gravitational constant,G=6.7 x 10^-11 m^3*kg^-1*s^-2, and Plancks constant, h=6.6 x 10^-34kg*m^2*s^-1
(a) Find a combination of these three constants that has thedimensions of time. This time is called the Planck time andrepresents the age of the universe before which the laws of physicsas presently understood cannot be applied.
(b) Using the formula for the Planck time derived in part (a), whatis the time in seconds?

The speed of light c is approximately 2.998×10⁸m/s m/s. What equation relates to the speed of light to other fundamental electromagnetic constants?

The speed of light c is approximately 2.998 10^8 m/s. What (rather remarkable!) equation relates the speed of light to other fundamental electromagnetic constants?