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## Homework Statement

Hi Guys,

Just started a Mechanical Engineering Course and in my Physics this came up, I'm really confused and dont know were to start. I was wondering if anyone could shead any light on the subject. Thanks guys.

Three of the fundamental constants of physics are the speed of light, c = 3.0 × 10⁸ m/s, the universal gravitational constant, G = 6.7 × 10ˉ¹¹m³·kgˉ¹·sˉ², and planck’s constant,

h = 66 × 10ˉ³⁴kg·m²·sˉ¹.

Find a combination of these three constants that has the dimensions of time. The time is called Planck time and represents the age of the universe before which the laws of physics as presently understood cannot be applied.

Using the formula for the planck time derived in part (a), what is the time in seconds?