Carlos set up three full vials beside one another and added drops to see the surface tension of different liquids. Which event could be a source of error? A. The vials were different shapes.
B. The liquids that spilled over the edges could mix on the table.
C. The vials were made of the same material.
D. The air temperature vaired when someone opened the window

the answer is b ) square root of 5

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )