Question Number 163858 by mathls last updated on 11/Jan/22
$${which}\:{object}\:{or}\:{substance}\:{has}\:\:{the}\: \\ $$$$\mathrm{2}{rd}\:{number}\:{velocity}\:{after}\:{light}? \\ $$
Commented by mathls last updated on 11/Jan/22
$${please}? \\ $$
Commented by mathls last updated on 12/Jan/22
$${please}\:{ans}\:{me}! \\ $$