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WHAT DO PHYSICISTS STUDY? WHAT ARE PHYSICAL PROPERTIES? HOW DO PHYSICISTS WORK? BIOGRAPHY: SIR ISAAC NEWTON English, 1642–1727 EQUATIONS APPLIED PHYSICS FIND OUT MORE
Physics is the…
WHAT IS THE UNIVERSE MADE OF? HOW BIG IS THE UNIVERSE? BIG BANGDARK MATTERFIND OUT MOREThe Universe is everything that exists—space and all the stars, planets, and other matter it contains.…
Bill Clinton: Whitewater, Paula Jones, and Monica Lewinsky by Ann-Marie Imbornoni and Tasha Vincent Clinton became the 42nd U.S. president following a turbulent political campaign that…
(Encyclopedia) rainbow, arc showing the colors of the spectrum, violet inside and red outside, which appears when the sun shines through water droplets. It often appears while the sun is shining…
(Encyclopedia) cobalt, metallic chemical element; symbol Co; at. no. 27; at. wt. 58.9332; m.p. 1,495℃; b.p. about 2,870℃; sp. gr. 8.9 at 20℃; valence +2 or +3. Cobalt is a silver-white, lustrous,…
