A1-l soda bottle contains dissolved carbon dioxide gas. which bottle would have the highest concentration of dissolved gas? a bottle that is sealed a bottle that was opened 1 minute ago a bottle that was opened 1 hour ago a bottle that was opened 1 day ago

This can be understood with the help of Henry's law

Henry's law say that the solubility of gas decreases with decrease in pressure

Thus in case of opened bottle for one day the pressure will be minimum and hence solubility will be least

in case of bottle opened for one hour the pressure will be less however more than bottle which is opened for one day

however in case of sealed bottle the pressure is very high and hence solubility will be maximum

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.