Final answer:
It is true that lower-ranked data types are converted to higher-ranked types during operations with mixed-type operands. There are two types of interferences, constructive and destructive, in Physics. Knowing only angles of vectors is inadequate for finding their resultant vector, and average speed can be less than average velocity if there is a change in direction.
Step-by-step explanation:
When evaluating an operator with mixed-type operands, such as in programming, it is true that the lower-ranked data type is generally converted to that of the higher-ranked data type to ensure consistency in operations. This process is known as type promotion or type coercion. Regarding the subject of interferences in Physics, the statement is true. There are indeed two types of interference: constructive interference and destructive interference. Constructive interference occurs when two waves combine to form a wave with a larger amplitude, whereas destructive interference occurs when two waves combine to form a wave with a smaller (or nullified) amplitude. In the case of vector addition, the statement is false. Knowing only the angles of two vectors is not sufficient to find the angle of their resultant addition vector; you must also know the magnitude of the vectors. For motion in a straight line, the statement could be true or false depending on the circumstances. The average speed is the total distance traveled divided by the total time, while the average velocity is the total displacement divided by the total time. If there is no change in direction, they could be equal. However, if there is a change in direction, the average speed could indeed be less than the average velocity, which is a vector quantity and takes direction into account.