Atoms are electrically neutral because they have equal numbers of protons positively charged and electrons negatively charged.if an atom gains or loses one or more electrons it becomes an ion
Answer:

Explanation:
The frequency and the wavelength of a wave are related by the equation

where
v is the speed
f is the frequency
is the wavelength
For the sound wave in this problem, we have
f = 634 Hz (frequency)
(wavelength)
Therefore, the speed of the wave is

The speed of sound in air depends on the temperature according to the equation

where T is the temperature.
In this problem, we know the speed, so we can calculate the temperature:
B
A qualitative observation describes the characteristics of a substance without quantifying them.
I believe your answer would be friction...