1
Long enough!
1 h, 10 m, 30 s
LENGTH OF A FOOTBALL feild
15 m divided by 2.5 m s-1 is 6 s.
Sarah M. H. Gardner has written: 'The fortunes of Margaret Weld'
2
100 seconds. 1 m/s 3x108
M. M. Hosseinioun has written: 'The influence of welding parameters and parent plate metallurgical characteristics on solidification of austeniticstainless steel weld metals'
As long as you like. 10 sqm is a measure of area. In the form of a rectangle, it could be 1 m * 10 m which would make it 10 m long. But it could also be 0.1 m * 100 m making it 100 m long or 0.01 m * 1000 m making it 1000 m long or 0.001 m * 10000 m making it 10000 m long. There is no limit to its length.
3-4 business days.
1 m = 100cm100/20= 5 times.