Question

It is best not to try to anticipate what a speaker is going to say before she says it.

a) True
b) False

Answer 1

A) True

You want to have an open mind to what the speaker can potentially say

Answer 2

Questions cover wave properties—such as interference types and wave superposition—as well as historical women's rights. The statements regarding wave properties are mostly true, while the one about infinite observed frequency at the speed of sound is false. Lastly, women were indeed considered legal persons before the 19th Amendment, which primarily granted them voting rights.

Step-by-step explanation:

Understanding Wave Properties and the 19th Amendment

Let's look into the properties of waves and a historical fact regarding women's rights to gauge the veracity of each statement.

Interference of waves occurs when two or more waves meet while traveling along the same medium. The statement that there are two types of interference, constructive and destructive, is True. Constructive interference happens when the waves are in phase and their amplitudes add up, while destructive interference occurs when the waves are out of phase and their amplitudes subtract.

The amplitude of a wave can indeed be affected by the amplitude of another wave through interference, but it is not necessary for them to be precisely aligned; they only need to meet or overlap, thus the statement is False.

Concerning frequencies, waves can superimpose regardless of whether their frequencies are the same or different. So the statement that waves can superimpose if their frequencies are different is True.

When a pebble is dropped in water, it creates a series of rings radiating outward from the point of impact. This is an example of a pulse wave, so the statement is True.

As for the Doppler effect, the observed frequency does not become infinite when the source moves at the speed of sound; rather, the frequencies from the source would pile up, leading to a shock wave, so the statement is False.

Lastly, the claim that women were not considered a legal person prior to the ratification of the 19th Amendment is False. While women's legal rights were significantly limited, they were still considered legal persons; the amendment primarily granted women the right to vote.