What Hadad can do is be determined or persistent in interconnecting with the doctor in numerous visits for the reason that sometimes a doctor doesn't see all the indications or a fundamental issue in the first visit. He must go see the doctor few times maybe there are a series of test to do to know what is happening to Hadad.
Complete Question
A baseball is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stop watch measures the ball's time in the air until it hits the ground to be 4.3 s. How far does the baseball travel horizontally?
Answer:
The distance covered horizontally is
Explanation:
From the question we are told that
The initial horizontal velocity is
The time taken by the ball in the air is
Generally the distance traveled by the ball is
=>
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Question
Rutherford tracked the motion of tiny, positively charged particles shot through a thin sheet of gold foil. Some particles travelled in a straight line and some were deflected at different angles.
Which statement best describes what Rutherford concluded from the motion of the particles?
A) Some particles travelled through empty spaces between atoms and some particles were deflected by electrons.
B) Some particles travelled through empty parts of the atom and some particles were deflected by electrons.
C) Some particles travelled through empty spaces between atoms and some particles were deflected by small areas of high-density positive charge in atoms.
D) Some particles travelled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.
Answer:
The right answer is C)
Explanation:
In the experiment described above, a piece of gold foil was hit with alpha particles, which have a positive charge. Alpha particles <em>α</em> were used because, if the nucleus was positive, then it would deflect the positive particles. The principles of physics posit that electric charges of the same orientation repel.
So most as expected some of the alpha particles went right through meaning that the gold atoms comprised mostly empty space except the areas that were with a dense population of positive charges. This area became known as the "nucleus".
Due to the presence of the positive charges in the nucleus, some particles had their paths bent at large angles others were deflected backwards.
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2 valence electrons
Explanation:
Electron configuration of nickel (Ni):
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸
The valence electrons are in the electronic shell with the higher principal quantum number (n). In our case, nickel have 2 electrons in the 4s², with the n = 4.
Learn more about:
electrons in the valence level
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