<Tr> <Td> 35 </Td> <Td> 351.88 </Td> <Td> 1.1455 </Td> <Td> 403.2 </Td> </Tr> <Tr> <Td> 30 </Td> <Td> 349.02 </Td> <Td> 1.1644 </Td> <Td> 406.5 </Td> </Tr> <Tr> <Td> 25 </Td> <Td> 346.13 </Td> <Td> 1.1839 </Td> <Td> 409.4 </Td> </Tr> <Tr> <Td> 20 </Td> <Td> 343.21 </Td> <Td> 1.2041 </Td> <Td> 413.3 </Td> </Tr>

What is the dimension of velocity of sound