Answer:
A. Atoms of the same element that have different numbers of nutrions.
Type one space between the number and the units, and then enter the units in the correct format. For example, a velocity would be entered as "1.2 m/s", not "1.2m/s".
<h3>What is velocity?</h3>
The pace at which an object's direction changes when it is traveling is referred to as its velocity and is measured by a particular unit of time and from a particular point of view. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that deals with the motion of bodies.
<h3>What is an example of velocity?</h3>
Velocity can be defined as the rate at which something moves in a specific direction. as the speed of a car driving north on a highway or the pace at which a rocket takes off.
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Answer:
Ptolemy proposed a model, he reference system is centered on the Earth
Copernicus, proposed a deferent system, this system is centered on the Sun, where it is at the origin of the system
Explanation:
Thousands of years ago, Ptolemy proposed a model to explain the movement of the planets and stars in the sky, in this model the reference system is centered on the Earth, so each body is orbiting in different spheres around the Earth as its center, this system had very complicated calculations and curves to be able to explain the orbits of the planets.
More recently Copernicus, proposed a deferent system, this system is centered on the Sun, where it is at the origin of the system, in this system the movement of the planets are ellipses, which is a much simpler explanation and has been widely accepted, in current systems the reference system is fixed in the bodies more massive, since this simplifies the explanation of the movements.
The answer is C
BeacUse solubility means the total of what one substance can dissolve
Answer:
- As an ice cube melts, its shape changes as it acquires the ability to flow. ... A physical change is a change to a sample of matter in which some ... The salt may be regained by boiling off the water, leaving the salt ... The resulting mixture is a solution with a pale green color. ... Answer b: chemical change.
Explanation: