Answer:
Sea-floor spreading occurs in the oceanic ridges. In there, volcanic activity, together with the gradual movement of the bottom, form new oceanic crust. This allows a better understanding of the continental drift explained by the theory of plate tectonics.
The greatest evidence for Sea-floor spreading is the oceanic trenches, the oceanic ridges, the magma protruding to the surface and the new seafloor.
In previous theories, continents were assumed to be transported across the sea. Harry Hess, in the 1960s, proposed the idea that the seabed itself moves as it expands from a central point. The theory is now accepted, and the phenomenon is thought to be caused by convection currents in the upper layer of the mantle.
Answer: 146.1 kg/m/s
Explanation: Momentum is equal to mass times velocity, so you do 9.74 kg times 15 m/s and get 146.1 kg/m/s.
Answer: 1.4mi/hr²
Explanation:
Blank 1: We know that acceleration is the change in velocity/change in time
Using this, we know that the acceleration will be: (50-15)/25 = 1.4
Blank 2: mi/hr²
The third statement is true:
A neap tide can occur for position A but not position B
Position B is a Spring tide
Answer:
The two fields vary with the inverse of the square of the distance
The gravitational field is always attractive, but the electric field can be attractive if the charges are of
Explanation:
The gravitational field is produced by the attraction of two masses, the electric field is due to interaction between two charges, if they are of a different sign they attract and if they are of the same sign they repel.
The two fields vary with the inverse of the square of the distance
The gravitational field is always attractive, but the electric field can be attractive if the charges are of a different sign and repulsive if the charges are of the same sign.
The gravitational field is important for objects of great masses, it shapes the planets and galaxies, the magnetic field is troublesome for the tamos and molcajetes, it shapes the micro world
