ข้อ 31 (Physics - โมมันตัม)

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31) William Herschel, the cosmologist who found Uranus, really named it George after King George the third. It was later renamed after the Greek divine force of the sky, Uranis. 

32) The measure of warmth in the Earth's climate is equivalent to the measure of warmth in the initial 10 feet of the sea. 

33) Werner Heisenberg, who is well known for his vulnerability conditions in quantum material science, almost bombed his doctoral tests since he knew nothing about test procedures. At the point when he was asked how a battery functioned, he had no clue. 

ข้อ 30 (Physics - งานและพลังงาน)

 

ติวเข้มฟิสิกส์ ตะลุยโจทย์ฟิสิกส์ ข้อสอบฟิสิกส์

16)  On the off chance that you put Saturn in water, it would skim. 

17) On the off chance that you mix a pack of cards appropriately, odds are that careful request has never been found in the whole history of the universe. 

18) Since the risky idea of their occupations, the Apollo space travelers couldn't make a difference for disaster protection. Rather they marked a heap of signatures trusting that they got significant in the event that they passed on.

19) The sky is blue since atoms noticeable all around dissipate blue light more than different shades of light. The blue light bobs off those atoms and hits your eyes, making you see blue. 

ข้อ 29 (Physics - งานและพลังงาน)

 

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11) You can't burp in space on the grounds that there's no gravity to isolate fluid from gas in your stomach. 

12) At the point when NASA arrived on defaces three men from Yemen sued them for intruding, asserting that they had acquired the planet from their progenitors. 

Related Topics :

visit : Nikola Tesla - Nikola Tesla top ten inventions.

👉: Facts about magnetism - complete information

Brief history of NASA / NASA space programs

ข้อ 28 (Physics - งานและพลังงาน)

 

Magnetism

The first hand rule deals with the B-field around a current bearing wire, the third hand rule looks at the force on charges moving in a B-field, and the second hand rule is redundant.

Solenoids are stronger with more current or more wire turns or adding a soft iron core.

ข้อ 27 (Physics - งานและพลังงาน)

 

Magnetism

The direction of a magnetic field is defined by the direction a compass needle points.

Magnetic fields point from the north to the south outside the magnet and south to north inside the magnet.

Magnetic flux is measured in webers.

Left hands are for negative charges and Right hands are for positive charges.

ข้อ 26 (Physics - งานและพลังงาน)

 

Electricity

Ionized gases conduct electric current using positive ions, negative ions and electrons.

Electric fields all point in the direction of the force on a positive test charge.

Electric fields between two parallel plates are uniform in strength except at the edges.

Millikan determined the charge on a single electron using his famous oil-drop experiment.

All charge changes result from the movement of electrons not protons. (an object becomes positive by losing electrons)

ข้อ 25 (Physics - งานและพลังงาน)

 

Electricity

A coulomb is charge, an amp is current [coulomb/sec] and a volt is potential difference [joule/coulomb].

Short fat cold wires make the best conductors

Electrons and protons have equal amounts of charge (1.6 x 10-19 coulombs each).

Adding a resistor in parallel decreases the total resistance of a circuit.

Adding a resistor in series increases the total resistance of a circuit.

ข้อ 24 (Physics - งานและพลังงาน)

 

Energy

Mechanical energy is the sum of the potential and kinetic energy.

UNITS: a = [m/sec2], F = [kg•m/sec2] (newton), work = pe= ke = [kg•m2/sec2] (joule)

1ev is an energy unit equal to 1.6 x 10-19 joules

Gravitational potential energy increases as height increases.

Kinetic energy changes only if velocity changes.

Mechanical energy (pe + ke) does not change for a free falling mass or a swinging pendulum. (when ignoring air friction)

Units for Power is [joules/sec] or the rate of change of energy.