The answer is Air Resistance
The independent variable refers to the type of socks (synthetic socks), the dependent variable is the number of blisters and the control is the two weeks that she switches back to the cotton socks.
<h3>What is the dependent variable?</h3>
In an experiment, the dependent variable is those being tested and changes according to the independent variable.
The control group is the set of experimental conditions that is used to compare a given outcome in an experiment.
In conclusion, The independent variable refers to the type of socks (synthetic socks), the dependent variable is the number of blisters and the control is the two weeks that she switches back to the cotton socks.
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Answer:
Heat
Explanation:
Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.
Hope this helped.
Answer:
Explanation:
Given
Original Frequency ![f=723\ Hz](https://tex.z-dn.net/?f=f%3D723%5C%20Hz)
apparent Frequency ![f'=697\ Hz](https://tex.z-dn.net/?f=f%27%3D697%5C%20Hz)
There is change in frequency whenever source move relative to the observer.
From Doppler effect we can write as
![f'=f\cdot \frac{v-v_o}{v+v_s}](https://tex.z-dn.net/?f=f%27%3Df%5Ccdot%20%5Cfrac%7Bv-v_o%7D%7Bv%2Bv_s%7D)
where
apparent frequency
v=velocity of sound in the given media
velocity of source
velocity of observer
here ![v_0=0](https://tex.z-dn.net/?f=v_0%3D0)
![697=723\cdot (\frac{343-0}{343+v_s})](https://tex.z-dn.net/?f=697%3D723%5Ccdot%20%28%5Cfrac%7B343-0%7D%7B343%2Bv_s%7D%29)
![v_s=(\frac{f}{f'}-1)v](https://tex.z-dn.net/?f=v_s%3D%28%5Cfrac%7Bf%7D%7Bf%27%7D-1%29v)
![v_s=(\frac{723}{697}-1)\cdot 343](https://tex.z-dn.net/?f=v_s%3D%28%5Cfrac%7B723%7D%7B697%7D-1%29%5Ccdot%20343)
![v_s=12.79\approx 12.8\ m/s](https://tex.z-dn.net/?f=v_s%3D12.79%5Capprox%2012.8%5C%20m%2Fs)
i.e.fork acquired a velocity of ![12.8 m/s](https://tex.z-dn.net/?f=12.8%20m%2Fs)
distance traveled by fork is given by
![v^2-u^2=2as](https://tex.z-dn.net/?f=v%5E2-u%5E2%3D2as)
where v=final velocity
u=initial velocity
a=acceleration
s=displacement
![v_s^2-0=2\times 9.8\times s](https://tex.z-dn.net/?f=v_s%5E2-0%3D2%5Ctimes%209.8%5Ctimes%20s)
![s=\frac{12.8^2}{2\times 9.8}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7B12.8%5E2%7D%7B2%5Ctimes%209.8%7D)
![s=8.35\ m](https://tex.z-dn.net/?f=s%3D8.35%5C%20m)
Answer:
because when the plant inhales c02 it exhales oxgen
Explanation: