Ingles
Chapter 5 — Community
On tech addiction and how it is compromising genuine human connection and community, Harari makes the point that it is easier than ever to talk to his cousin in Switzerland but it is harder to talk to his husband over breakfast because he constantly looks at his smartphone instead of at him.
Chapter 6 — Civilization
10,000 years ago, humankind was divided into countless isolated tribes where we knew no more than a few dozen people. With each passing millennium, these tribes
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First computer 1940-1956 systems used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms. These computers were very expensive to operate and in addition to using a great deal of electricity, the first computers generated a lot of heat, which was often the cause of malfunctions. First generation computers relied on machine language, the lowest-level programming language understood by computers, to perform operations, and they could only solve
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Q # 1. The potential is constant throughout a given region of space. Is the electric field zero or non zero in
this region? Explain.
Ans. The electric field intensity is described by the relation:
According to the relation, the electric field is negative gradient of electric potential. If the electric
potential is constant throughout given region of space, then change in electric potential , hence .
Q # 2. Suppose that you follow an electric field line due to a positive point charge. Do electric field
ESS
ESS TEST 1 – DEFINITIONS:
·Open system: system that exchanges ENERGY and MATTER with the outside
·Closed system: system that exchanges only ENERGY with the outside
·Isolated system: system that doesn’t exchange anything with the outside
·Transfer: movement of energy from one place to another
·Transformation: when the energy changes from one form to another
·1st Law of Thermodynamics: energy cannot be created or destroyed, only changes from one form to another
·2nd Law of Thermodynamics: entropy
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A 5.0-kg object slides down a surface inclined at an angle of 30o from the horizontal. Friction may be neglected. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force exerted on the object by the surface is most nearly
·0 kJ
An object moves halfway around a circle of radius R. An inward radial force of magnitude F is The work done on the object by the radial force being exerted on it is
·zero
A person exerts a constant force
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42is a movie based on a true story about the first African American player in the Major League Baseball, it’s directed by Brian Helgeland. Shortly after the WW2 ended many baseball stars returned to the league, but the surprising event that happened during this period was that Branch Rickey the owner of the Brooklyn Dodgers (now known as the LA dodgers) signed Jackie Robinson the first African American to ever play in the MLB. Even though every white fan and player tried to make him quit and stop
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