Which statement is not true for a magnetic field? O A. A magnetic field occurs near a wire that has no current.
OB. A magnetic field is produced by a magnet with two poles.
O c. A magnetic field loops from the north pole to the south pole.
O D. A magnetic field occurs near a current-carrying wire.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon