Answer:
Frequency determines the pitch we perceive. Amplitude determines the volume, and loudness perceived (see more detail below)
Explanation:
A most fundamental wave shape is the sine (or cosine). A sine wave has three parameters: (1) frequency, (2) phase, and (3) amplitude. Out of the three, two play a role in your question, as follows.
The frequency, namely the number of periods (repetitions) per second, is perceived by our ear of "the pitch." The higher the frequency, the higher the pitch. However, our ears perceive pitch as a logarithm of the physical frequency. Every doubling of the frequency causes us to hear the pitch to increase by one octave.
The volume is determined by the amplitude of the wave. The higher the amplitude (positive or negative) the higher the volume. Our ears perceive volume as "loudness" and, again, not linearly - some frequencies are perceived as louder than others, even though they have the same physical volume. Frequencies between about 200 and 2000 Hz are perceived as louder than the rest of the audible spectrum (between 20 and 20000 Hz).
Interestingly, the phase does not play all too prominent role in perception, at least as far as music and speech are concerned.
Answer: E = 7,490.6 N/C
Explanation:
If we have a field E, and a particle with a charge q, the force that the particle experiences is:
F = E*q
In this case, we know that the force is:
F = 1.2*10^(-15) N
And we know that the particle is a proton, where the charge of a proton is:
q = 1.602*10^(-19) C
Then we can replace these two values in the equation to get:
1.2*10^(-15) N = E*1.602*10^(-19) C
We just need to isolate E.
(1.2*10^(-15) N)/(1.602*10^(-19) C) = E
7,490.6 N/C = E
That is the strength of the electric field.
Answer:
she should add solute to the solvent
Explanation:
Given data :
Mass of the sodium chloride, = 20.0 g
Concentration of the solution = 10 g/L
Volume of 20.0 g of sodium chloride = 7.50 mL
Now, from the concentration, we can conclude that for 10 g of sodium chloride volume of the solution is 1 L
thus, for 20 g of sodium chloride volume of the solution is 2 L or 2000 mL
also,
Volume of solution = Volume of solute(sodium chloride) + volume of solvent (water)
thus,
2000 mL = 7.5 mL + volume of solvent (water)
or
volume of water = (2000 - 7.5) mL
or
volume of water = 1992.5 mL
or
volume of water = 199.25 L ≈ 199 L
Answer: True
Explanation: When light is reflected off lets say a mirror it is bent and changes direction to bounce off of another wall or object. For example if you take a flash light and shine it into a mirror the light reflects into a different direction your welcome
Elements<span> in the same </span>group<span> in the periodic table </span>have similar chemical properties<span>. This is because their atoms </span>have<span> the same number of electrons in the highest occupied energy level. </span>Group<span> 1 </span>elements<span> are reactive metals called the alkali metals.</span>Group<span> 0 </span>elements<span> are unreactive non-metals called the noble gases.
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