The displacement vector from your house to the library is 520 m long, pointing 40 ∘ north of east.What are the x-component (x-axis is directed from west to east) of this displacement vector?What are the y-component (y-axis is directed from south to north) of this displacement vector?
Answers
Answer:
398.3 m, 334.2 m
Explanation:
The magnitude of the displacement vector is
v = 520 m
And its direction is
measured as north of east.
The x-component of this vector is given by:
While the y-component is given by
Final answer:
The x-component of the displacement vector (east-west direction) is approximately 398 m and the y-component (north-south direction) is approximately 334 m.
Explanation:
Displacement vectors contain both magnitude and direction information. In the case of a displacement vector 520 m long, pointing 40 degrees North of East, we can break it down into x and y components using trigonometric functions, specifically cosine and sine.
For the x-component (east-west direction), we can use the cosine function because it gives us the adjacent side in a right triangle, which is the east-west direction in our case. Therefore, the x-component will be:
520 m * cos(40) = 398m (rounded to nearest unit).
For the y-component (north-south direction), we can use the sine function because it gives us the opposite side in a right triangle, which is the north-south direction in our case. Hence the y-component will be:
520 m * sin(40) = 334 m (rounded to nearest unit).
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Rutherford's experiment conclude that: atoms are not solid, atoms are hollow and most of the space is vacuum and the positive charge in an atom is not spread evenly .
What is conclusion of Rutherford's experiment?
Rutherford's observations lead him to draw the following conclusions:
- Most of the space in an atom is unoccupied since a significant portion of the -particles bombarded towards the gold sheet went through the sheet without any deflection.
- Because some of the -particles were somewhat deflected by the gold sheet, the positive charge in an atom is not spread evenly. An atom's positive charge is confined to a very small volume.
- Only a few of the -particles had deflection angles that were nearly 180 degrees, meaning that very few of the -particles were deflected back. As a result, in relation to the total volume of an atom, the positively charged particles' volume is extremely small.
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Rutherford's model of the atom (ESAAQ) Rutherford carried out some experiments which led to a change in ideas around the atom. His new model described the atom as a tiny, dense, positively charged core called a nucleus surrounded by lighter, negatively charged electrons.
B.) Solid sodium chloride is a good conductor of electric current.
C.) Sodium chloride has a low melting point.
D.) Liquid sodium chloride is a good conductor of electric current.
Answers
NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.c Thus, option D is correct.
What best describes the properties of sodium chloride?
The ions (Na+& Cl) are free to move around and can thus function as charge carriers, since the motility of individual atoms or molecules in liquid state is significantly larger than that of solid state. Because of the free ions, molten sodium chloride is a good conductor of electricity.
The charged particles (ions) in solid “[NaCl]” cannot move because they are bound by powerful electrostatic forces, making it a poor conductor of electricity. They cannot conduct electricity as a result.
Therefore, NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.
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D. because sodium chloride is an ion
first of all , sodium chloride is salt and we all know that it is not malleable.
sodium chloride is an ion which do conduct electricity but not when they are solid.....they only do so when they are molten or aqueous ( dissolved in water )
sodium chloride is an ion. ions have high melting points.
D is true because as i have mentioned above , ions will conduct electricity when dissolved in water / aqueous or molten.......... HOPE IT HELPED !!!!!!
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b. 30 to 60 years
c. 60 to 120 years
d. 150 to 500 years
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Answer:
Big bang describes an ever expanding model of the universe.
Steady state theory explains a universe that always existed in the same state.
Explanation:
The two theories Big bang and Steady state are two of the theories that explain the origin of the universe in two different ways.
The Big bang model states that the universe is ever expanding and began from a singularity. It says that from that time universe is ever expanding creating new clusters of galaxies.
This was proved using mathematical formulae and models .
Steady state theory states that the density of matter remains unchanged due to the creation of matter. Observable universe is the same at any point of time is its summary.
Answer:
The big bang is the theory that describes how the universe emerges, it tells us that in the beginning all the space was contained in a space that was too small, and from there, it expanded rapidly until it reached the state of the universe that we know today, and that continues in expansion.
The theory of the oscillating universe describes a universe that begins and ends cyclically, it beging with something like the big bang, end ends in what is known as the big crunch, and so on. It says that the universe did not have a beginning but has always been restarting.
The theory of the static or steady state universe describes a type of universe uniform in space and time. And in which the universe has always remained the same regardless of where it is observed, wich is different from the other theories since the big bang theory says the universe had a beginning. In this theory it is claimed that the universe is homogeneous and isotropic. This theory is not very popular today.