Josh stored an electric potential energy of 2.5J in a vacuum of 1.00m³ by a field E. if the field is reduced to 1/4 of its initial value, how much energy is
stored per cubic meter.
Ans is 0.2J/m³

A professor accelerated an electron of mass 9.1 x 10^15N/C between two
parallel charged plates of separation 1.7cm. Calculate the velocity with
which the electron leaves a hole in the positive plate if it is accelerated near
the negative plate.
Ans is 4.2 x 10^12m/s​

Acetic acid  /əˈsiːtɪk/, systematically named  ethanoic acid  /ˌɛθəˈnoʊɪk/, is a colourless liquid  organic compound  with the  chemical formula  ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called  glacial acetic acid.  vinegar  is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to  polyvinyl acetate  and  cellulose acetate. it is classified as a  weak acid  since it only partially  dissociates  in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7  3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366  chemblchembl539  chemspider171  drugbankdb03166  echa infocard100.000.528ec number200-580-7e numbere260  (preservatives)gmelin reference1380iuphar/bps1058keggd00010  meshacetic+acidpubchem  cid176rtecs numberaf1225000uniiq40q9n063p  un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4)  key:   qtbsbxvteameqo-uhfffaoysa-n  smilescc(o)=o

The answer is b.the gaseous state is electrically positive, while the plasma state is electrically negative. 

It is d, all the other ones say incorrect answer .

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.