what are the S I units of k so that the equation velocity =k × density is dimensionally correct. Keep your answers in basic units​

car a and b are moving in opposite directions

plz mark.me the brainliest i rlly need this kind of yours in exchange

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.

magnified images possible images can be real = projected onto a screen

wavelength divides in half and speed stays the same.