it is 4:3. a simple google search would have led you to the answer though. Maybe you should consider that next time.
Each LED in the display must be powered separately with a current source. The required current depends on the ratings of the LED and the desired brightness level. The usual grubby 7-segment display will accept 10-20mA and be adequately bright over that range. Most 7-segment displays have 8 or 9 LEDs (one for each segment, one for the decimal, and sometimes one for a high left-side decimal). Most displays have common cathodes and independent anodes. Each anode will typically be powered independently of the others, often by the output of a microcontroller or converter/driver chip (BCD to 7 seg or binary to 7 seg). As these outputs are often un-limited voltage sources, a limiting resistor must be used in series with the output powering each LED. Calculating the resistor value is simple. Use the formula R = (Vsrc-Vdrop)/Iseg, where Vsrc is the source voltage of the output, Vdrop is the forward voltage drop of the LED (Typically you can approximate this to 2V for most LEDs.), and Iseg is the current desired. Assuming you have 12V outputs and want around 15mA driving each LED, the resistors should be (12-2)/0.015, or 666ohms. (680ohms is the nearest standard value.)
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The term surd traces back to al-Khwārizmī, who referred to rational and irrational numbers as audible and inaudible, respectively. This later led to the Arabic word "أصم‎" (asamm, meaning "deaf" or "dumb") for irrational number being translated into Latin as "surdus" (meaning "deaf" or "mute").
There is an area of study called history of mathematics.Mathematics has a history of over 4000 years, and a lot of what we study today has its roots in the distant past.History can help us to understand how mathematics got to be the way it is today. There are two very broad factors influencing the development of mathematics.One is practical problems that need to be solved. Arithmetic evolved to meet the needs of trade. The earliest geometry is supposed to have come about because of problems in measuring land. In later times, the development of cannons required the development of ballistics, and also of new types of fortification to resist the new weapons. Many times in history, the most powerful country in economic and military power has also been the leading country in mathematics.The other factor is developments internal to mathematics. A famous example is the discovery that the side of a square and the length of its diagonal cannot be expressed as the ratio of whole numbers (in more modern language, that the square root of 2 is irrational). This was a purely theoretical discovery with no practical consequences. But it undermined the geometry of the time of the Pythagoreans, which was based on whole number ratios. It led mathematicians to create a new theory that can be found in Euclid's Elements, and that theory eventually contributed to our modern understanding of real numbers.
In 1800, Gabriel Prosser organized and lead a large slave rebellion in Richmond, Virginia. Prosser ended up being betrayed and he and thirty-five of his followers were hanged. In 1831, Nat Turner led the only effective rebellion in the United States in Southampton, Virginia. Sixty whites were killed before Turner and his followers were captured and hanged.
Black Hawk
Led a rebellion in Virginia with more than 50 followers and attacked four plantations and killed about 60 whites. eventually captured and executed.
Bacon's Rebellion was precipitated by what Bacon perceived as unfair treatment by William Berkeley, Governor of Virginia. Berkeley excluded Bacon from his government.
the rebellion was led by daniel shay
Wu Wang led the rebellion.
Whiskey rebellion
Daniel Shay led the rebellion that undermined the article of confederation.
shays rebellion
The Boxer Rebellion
The first rebellion against King James II was led by the Duke of Monmouth, who was beheaded after the rebellion was stopped. Another rebellion was led against him by Archibald Campbell, who was also executed by beheading.
Slavery