The first person to say the Earth orbited the sun was Nicolaus Copernicus
Answer:
The idea behind space expansion is that after the big bang, the universe started infinitely expanding. It's also called metric expansion. Stephen Hawking's A Brief History of Time goes further into detail on this.
Answer:
The answer is below
Explanation:
The speed of the boat in still water is perpendicular to the speed of the water flow. Therefore the speed relative to the ground (V), the speed of flow and the speed of the boat in still water form a right angled triangle. Hence the speed relative to the ground is given as:
V² = 56² + 126²
V² = 19012
V = 137.9 m/s
1 metric ton is bigger than 1 ton. 1 metric ton = 1.102311 tons or 2,204.622 pounds. on ton only = 2,000 pounds.
