Answer:
Center of gravity
Explanation:
Gravity always acts downward on every object on earth . Gravity multiplied by the objects mass produces a force called weight. Although the force of an objects weight acts downwards on every partial of the object , it is usually considered to act as a single force through its balance point , or center of gravity.
They do this so that when you drink it or use it the contaminates that used to be in it dont make you sick
<h3>
Answer:</h3>
The higher is its frequency.
<h3>
Explanation:</h3>
- Electromagnetic waves are types of waves that do not require a material medium for transmission.
- They include radio waves, microwaves, infra-red and gamma rays among others.
- Frequency refers to the number of complete oscillations in one second while wavelength is the distance between two successive crests or trough in a transverse wave.
- The frequency of electromagnetic waves varies inversely to the wavelength.
- Electromagnetic waves with higher frequencies such as x-rays and gamma rays have lower wavelengths.
- Those with higher wavelengths, on the other hand, such as microwaves and radio waves have lower frequencies.
Physical change. Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. ... Physical changes occur when objects or substances undergo a change that does not change their chemical composition.
Answer:
0.132 meters is the wavelength of sounds to which people are most sensitive.
Explanation:
Frequency of the sound human ears are most sensitive to = 
Speed of the sound wave = S = 330 m/s
Wavelength of the sound human ears are most sensitive to = 
0.132 meters is the wavelength of sounds to which people are most sensitive.
