I can't particularly place what Icelandic contributed.
But every other culture contributed majorly.
So I would go for option b.
B) 7.87 m/s
The gravitational pull is the rate of change of velocity which is the acceleration. Formula for acceleration is;
![a = \frac{final \: velocity - initial \: velocity}{time \: taken}](https://tex.z-dn.net/?f=a%20%3D%20%20%5Cfrac%7Bfinal%20%5C%3A%20velocity%20-%20initial%20%5C%3A%20velocity%7D%7Btime%20%5C%3A%20taken%7D%20)
Given:
• Initial velocity = 0m/s; I dropped the ball, and didn't throw it, so it was at rest firstly
• Time taken = 2.40s
• Acceleration = 3.28m/s^2
We're require to find the final velocity, at which the ball hit the ground with. Ignoring air resistance, keep in mind that the velocity of an object increases as it comes closer to the ground.
![3.28 = \frac{final \: velocity - 0}{2.40}](https://tex.z-dn.net/?f=3.28%20%20%3D%20%20%5Cfrac%7Bfinal%20%5C%3A%20velocity%20-%200%7D%7B2.40%7D%20)
![3.28 \times 2.40 = final \: velocity](https://tex.z-dn.net/?f=3.28%20%5Ctimes%202.40%20%3D%20final%20%5C%3A%20velocity)
Force is (mass × acceleration) measured in Newton
Pressure is the 'force' per unit area measured in Newton/m^2 (pascal)
C real,inverted and smaller than the object
Our year would now be 2.8 times longer, we would also be receiving only 1/4 of the energy from the sun that we currently do. This means that we’d now be out beyond the orbit of Mars and right at the edge of the asteroid belt, and things would rapidly get very cold with temperatures expected to drop by around 50 degrees Celsius on average, and that’s with our current atmospheric composition which would not be stable in the new conditions. And also, any living thing on earth would die.