Gravitational force or gravitational pull involves the attraction between objects with mass
Answer:
The Enlightenment.
Explanation:
The Enlightenment took place during the eighteen century and it typically involved a period of philosophical, cultural and intellectual movement in which ideas on nature, reason, humanity and God were emphasized on greatly over science and superstition through meetings that were held at coffeeshops, scientific academies, literary salons, masonic lodges, etc. Some of the influential philosophers of the enlightenment were Adam Smith, John Locke, Jean Jacques Rousseau, David Hume, Baruch Spinoza, Montesquieu, Hugo Grotius, Denis Diderot, Gottfried Wilhelm, Cesare Beccaria, Immanuel Kant etc. The enlightenment was also known as the age of reason or the age of enlightenment.
Hence, the enlightenment was a period in European history when many educated people stressed the importance of learning and reasoning; education was considered the key to understanding and solving society's problems.
We've never discovered any way for wavelengths of light to
appear to get longer after they leave the source, except for
the Doppler effect ... when the observer and the source of
the light are moving apart.
Since we don't know any other way for it to happen, whenever
we see a star or a galaxy whose light is red-shifted, we conclude
that it is moving away from Earth.
If you think about this for a few seconds, there are two things
about it that should blow your mind:
#1). "Red-shifted" means that the wavelengths of the light we see
are longer than the wavelengths of the light that left the star.
How do we know what the wavelength was when it left the star ?
#2). Our whole picture of the "expanding universe" ... which is a
big part of the foundation that supports the whole picture of the
"big bang" ... rests on the red-shift of light from distant galaxies,
and our conclusion that they are all moving away from us.
If we ever discover a DIFFERENT way that light can become
red-shifted, that may be IT for the expanding universe and the
big bang, both. They may both be out the window.
Answer:
11.87
Explanation:
final velocity^2= initial velocity ^2+ 2* Acceleration* distance
Final Velocity^2= 9*9+2*1.5.20
final velocity^2 = 141
final velocity = 11.87