This theory was first proposed by Nicolaus Copernicus. Copernicus was a Polish astronomer. He first published the heliocentric system in his book: De revolutionibus <span>orbium </span>coelestium<span> , "On the revolutions of the heavenly bodies," which appeared in 1543.</span>
1st derivative gives velocity;
d r(t)/ dt = 2t i + 6 j + 4/t k
2nd derivative gives acceleration;
d^2 r(t)/ dt^2 = 2 i - 4/ t^2
Speed ;
Square root of (4 t^2 + 36 + 16/ t^2)
For a given time, like 2 seconds, t will be 2. And answer of speed will be scalar.
The Nazca plate will move under the south american plate. i know its late but it will help others!
Answer:d
Explanation:
Alpha particles are heaviest among alpha, beta and gamma so they have least amount of Penetration compared to both.
Gamma Particles are lightest among three so they can Penetrate most .
The order of Penetration is given by
Alpha< Beta < Gamma
If friction is acting along the plane upwards
then in this case we will have
For equilibrium of 100 kg box on inclined plane we have
also for other side of hanging mass we have
now we have
In other case we can assume that friction will act along the plane downwards
so now in that case we will have
also we have
now we have
<em>So the range of angle will be 23.45 degree to 37 degree</em>
