Answer:
today's species evolved from those of the past.
Explanation:
By comparing fossils of a specie from long ago to those of today, we can conclude that today's species evolved from those of the past.
- Fossils are the preserved remains of ancient life forms found within sedimentary bed layers.
- These fossils helps scientists to understand ancient life forms.
- According to the discovery of Charles Darwin, organisms have evolved and are still evolving.
- Understanding past life forms gives a way to characterize present day species better.
Answer: well the time it takes to fall 100m is the same time it takes to travel 65m horizontally.
The time to fall vertically, t is sqrt(2d/g). [this comes from d = 1/2at^2]
so t = sqrt(2*100/9.8) = 4.52s.
The vertical speed at that time is g*t = 9.8*4.52 = 44.3m/s
The horizontal speed is the horizontal distance over the same 4.52s, = 65/4.52 = 14.4m/s.
so the final velocity is = sqrt(44.3^2 + 14.4^2) = 46.6m/s
Explanation: yes
Answer: The satellite, if it is orbiting at a certain speed once launched into space, will continue to orbit at that same speed until it collided with some other force, such as debris or something along those lines. In space, with the amount of gravitational pull that surrounds the earth, once something falls into orbit, it will continue to orbit the same way as it began. The earth will continue to pull the satellites towards itself with the same amount of force, and so will keep its orbit consistent.
Explanation:
Answer:
The string is more likely to break when the circle is vertical
Explanation:
The string is more likely to break when the circle is vertical because tension in the string is the same throughout the circular motion and it is equal to mrw^2 when it is rotated in the horizontal plane while tension in the string is maximum and is given by mrw^2+mg when in the vertical plane.