Answer:
Einstein's 1915 general theory of relativity holds that what we perceive as the force of gravity arises from the curvature of space and time. The scientist proposed that objects such as the sun and the Earth change this geometry.
Explanation:
Clarify what you mean by ratios?
Answer;
C. outer core.
Scientists think that the outer core, made of liquid iron and nickel, moves to produce Earth’s magnetic field
Explanation;
-The earth's magnetic field is believed to be generated deep down in the Earth's core. The outer core, a 2,000 km thick layer of iron, nickel, and small quantities of other metals. It has lower pressure than the inner core which means the metal here is fluid.
-In the Earth, the liquid metal that makes up the outer core passes through a magnetic field, which causes an electric current to flow within the liquid metal. The electric current, in turn, creates its own magnetic field—one that is stronger than the field that created it in the first place.
Answer:
The polar coordinate of is .
Explanation:
Given a point in rectangular form, that is , its polar form is defined by:
(1)
Where:
- Norm, measured in meters.
- Direction, measured in sexagesimal degrees.
The norm of the point is determined by Pythagorean Theorem:
(2)
And direction is calculated by following trigonometric relation:
(3)
If we know that and , then the components of coordinates in polar form is:
Since and , direction is located at 3rd Quadrant. Given that tangent function has a period of 180º, we find direction by using this formula:
The polar coordinate of is .