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(MC) Read this excerpt from Abraham Lincoln’s Gettysburg Address and then answer the question that follows: (1) Four score and seven years ago, our fathers brought forth upon this continent a new nation: conceived in liberty, and dedicated to the proposition that all men are created equal. Now we are engaged in a great civil war … testing whether that nation, or any nation so conceived and so dedicated … can long endure. We are met on a great battlefield of that war. (2) We have come to dedicate a portion of that field as a final resting place for those who here gave their lives that this nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we cannot dedicate … we cannot consecrate … we cannot hallow this ground. The brave men, living and dead, who struggled here have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember, what we say here, but it can never forget what they did here. What does President Lincoln imply by the line in bold? (5 points)  

Which of the following describes a covalent bond?

Periodic Table – Ptable – Properties-2.html If you had to draw the Lewis Dot Structure for Potassium, it would look like:

Periodic Table – Ptable – Properties.html Using the periodic table, determine the number of valence electrons  for the element Oxygen (O)

Which of the following best explains why noble gases are chemically unreactive?

Why does ice float on water?

Sodium (Na) and Chlorine (Cl) form an ionic bond because:

A Model X Tesla runs full self-driving (FSD) mode on the US-290W highway. Suddenly, its vision system detected a car trying to come out from an intersection. Since the two cars are in a direct collision path, the FSD has sent a signal to the power modulator of the drive system to break. However, the other car stopped at the right moment. Therefore, FSD has again sent a signal to drive control to accelerate. According to this equation, Tm – Tl = Jdωdt. What conditions satisfied the dynamics of the Tesla electric drive? Select all that apply.

A motor drive connected to an elastic clutch. The initial load torque was positive when the drive was in forward operation. After a while, the drive is in the reverse direction; therefore, the load torque becomes negative.  

An electric drive can convert dissipated heat energy to power. In this case, the drive should operate under which quadrant (s)?