Answer:
A -Added when in the same direction
Subtracted when in opposite directions.
Explanation:
The triangle <span>in the first law of thermodynamics, represents energy that moves from a hot object to a cooler object.</span>
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
I would say radio waves infared rays and xray