2.14x 1022 kg
the 22 is a xponet of ten
For the given wave speed, the frequency is 2.0 Hz
<h3>What is frequency?</h3>
The frequency is the number of cycles per second in the sinusoidal wave.
Given is the length of the string L = 40cm, the wave speed v =320 cm/s, then the wavelength is
λ =4L
λ =4 x 40 cm =160 cm.
The frequency is related to the wavelength as
f =v/λ
f =320/160
f=2.0 Hz
Thus, the frequency is 2.0 Hz.
Learn more about frequency.
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The correct answer is D. Amount of time and area of physical contact between the substances.
Explanation:
Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.
Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-
Technically, both B and D are correct when transmitted through solids, but your answer (and the answer I got from taking the test) will be
D) Longitudinal
Hope this helps!
Answer:
The electric potential is 
Explanation:
From the question we are told that
The length of the rod is 
The total charge of the rod is 
The length from the center is 
The diagram illustrating the setup for this question is shown on the first uploaded image
From the diagram the potential at point A 
is mathematically represented as
Where K is the coulomb constant with a value 
where q is the charge in charge the rod relative to its distance from A is mathematically represented as
This a small unit length of the rod
So 
=> ![V = k\frac{q}{L} ln [\frac{4}{2} ]](https://tex.z-dn.net/?f=V%20%3D%20%20k%5Cfrac%7Bq%7D%7BL%7D%20%20ln%20%5B%5Cfrac%7B4%7D%7B2%7D%20%5D)
Substituting values
