noise

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Car with a pickle design in the Zagreb Red Bull Soapbox Race, Zagreb, Croatia, September 14, 2019. (games, races, sports)

10 Unusual Sports

San Francisco, California/USA-1/18/20: Womens March at Civic Center marching with signs of political protest regarding equality also embracing 2020 presidential candidates and celebrating equality

How Does the U.S. Government Define the Difference Between a Protest and a Riot?

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Estimated battle casualties, Normandy invasion, World War II. WWII, D-Day

Estimated Battle Casualties During the Normandy Invasion and Campaign to Liberate Paris (June–August 1944)

Statue of Nostradamus

Nostradamus and His Prophecies

pulmonary veins and arteries, circulation, cardiovascular system, human anatomy, (Netter replacement project - SSC)

13 Questions About How the Human Body Works Answered

noise

radiation

Learn about this topic in these articles:

radar systems

In radar: Receiver noise
The sensitivity of a radar receiver is determined by the unavoidable noise that appears at its input. At microwave radar frequencies, the noise that limits detectability is usually generated by the receiver itself (i.e., by the random motion of electrons at the input of…
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