An object is in static equilibrium if

An object is in static equilibrium if the following is true:

+ the sum of the forces on it in each direction is zero.

+ the sum of the forces on it in each direction is zero.+ the sum of the torques on it in each direction is zero.

+ the sum of the forces on it in each direction is zero.+ the sum of the torques on it in each direction is zero.+ it's linear momentum is zero (i.e. it's not moving).

electromagnetic waves travel through space with vacuums. give me brainliest if right.

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.