To ensure a steady flight, the standard golf ball has nearly 400 or dimples on its surface.
a. facets
b. indentations
c. indentures
d. orifices

To ensure a steady flight, the standard golf ball has nearly 400 or 392 indentations or dimples to be exact on its surface. The steady flight of golf ball comes from the combination of pressure drag and the Magnus lift. The drag reduces horizontal speed in the trajectory motion and the Magnus lift provides a backlift that supports during the initial trajectory of the golf ball.

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

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.