An antiproton is the anti-particle of the proton. It has the same mass as a proton, but has a charge of -1.60 x
10-19 C and is made of antimatter. Whenever matter
and antimatter come into contact they will annihilate
and convert 100% of their mass into energy. If 285
protons collided with an equal number of antiprotons,
the total energy released would be x10-7 J.

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b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

i don't know that i agree with that but what's the question ?

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.