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2. Electromagnetic spectrum - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_spectrum

   Frequencies observed in astronomy range from 2.4 × 10 23 Hz (1 GeV gamma rays) down to the local plasma frequency of the ionized interstellar medium (~1 kHz). Wavelength is inversely proportional to the wave frequency, [ 1 ] so gamma rays have very short wavelengths that are fractions of the size of atoms , whereas wavelengths on the opposite ...

3. Attention deficit hyperactivity disorder - Wikipedia

   en.wikipedia.org/wiki/Attention_deficit...

   Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.

4. Lithium-ion battery - Wikipedia

   en.wikipedia.org/wiki/Lithium-ion_battery

   A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.

5. Mister Ten Per Cent - Wikipedia

   en.wikipedia.org/wiki/Mister_Ten_Per_Cent

   Mister Ten Per Cent is a 1967 British comedy film directed by Peter Graham Scott and starring Charlie Drake, Derek Nimmo and Wanda Ventham. [1] It was written by Mira Avrech, Charlie Drake, Norman Hudis and Lew Schwarz.

6. Legality of cannabis by U.S. jurisdiction - Wikipedia

   en.wikipedia.org/wiki/Legality_of_cannabis_by_U...

   Notes: · Reflects laws of states and territories, including laws which have not yet gone into effect. Does not reflect federal, tribal, or local laws. · Map does not show state legality of hemp-derived cannabinoids such as CBD or delta-8-THC, which have been legal at federal level since enactment of the 2018 Farm Bill

7. Economy of the Confederate States of America - Wikipedia

   en.wikipedia.org/wiki/Economy_of_the_Confederate...

   The main prewar agricultural products of the Confederate States were cotton, tobacco, and sugarcane, with hogs, cattle, grain and vegetable plots. Pre-war agricultural production estimated for the Southern states is as follows (Union states in parentheses for comparison): 1.7 million horses (3.4 million), 800,000 mules (100,000), 2.7 million dairy cows (5 million), 5 million sheep (14 million ...