What is Particle-antiparticle annihilation after watching the video minutephysics Antimatter Explained

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

What happens in a global convection cell

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.