<h2>
Hello there! :)</h2>
It's very wonderful to help you today!
Answer:
The resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
Explanation:
The resistance of the wire goes up as the temperature goes up.
By Ohm's law, we have the relationship between the resistance of a conductor R, the current flowing through it, I, and the voltage across it, V,
![V=R~x~I](https://tex.z-dn.net/?f=V%3DR~x~I)
As described, the current through the wire decreases so, to maintain the same voltage, the resistance must increase when the wire is heated. Let's say R1 is the resistance before heating the wire and R2 is the resistance after,
![V=R_{1} x~I_{1} =R_{2}~} x~I_{2}](https://tex.z-dn.net/?f=V%3DR_%7B1%7D%20x~I_%7B1%7D%20%3DR_%7B2%7D~%7D%20%20x~I_%7B2%7D)
Let's solve for R2,
![R_{2} =\frac{I_{1} }{I_{2} }~x~R_{1}](https://tex.z-dn.net/?f=R_%7B2%7D%20%3D%5Cfrac%7BI_%7B1%7D%20%7D%7BI_%7B2%7D%20%7D~x~R_%7B1%7D)
In this case, I1 = 0.3A and I2 = 0.26A,
![R_{2} =\frac{0.3A}{0.26A} ~x~R_{1} =1.15R_{1}](https://tex.z-dn.net/?f=R_%7B2%7D%20%3D%5Cfrac%7B0.3A%7D%7B0.26A%7D%20~x~R_%7B1%7D%20%3D1.15R_%7B1%7D)
Hence, the <u><em>resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.</em></u>
Answer:
892 Hz or 842 Hz
Explanation:
Given
The frequency of first guitar is 867 Hz
Beat is produced for every 0·04 s
∴ Beat has a time period of 0·04 s
<h3>Beat frequency is defined as the inverse of the time period of the beat </h3>
Beat frequency = 1 ÷ (Time period) = 1 ÷ 0·04 = 25 Hz
Let the frequency of the second guitar be f Hz
<h3>Beat frequency is defined as the absolute difference between the two frequencies</h3>
∴ Beat frequency = (867 - f) or (f - 867)
First case
25 = 867 - f ⇒ f = 842 Hz
Second case
25 = f - 867 ⇒ f = 892 Hz
∴ Possible frequencies of second guitar could be 892 Hz or 842 Hz
Answer:
A.The direction in which light is bent
Explanation:
That why I the topic thin lenses we learn how to draw Ray's of light
A star will ultimately become a black hole when it collapses due to end of fuel.
<h3>Which star becomes a black hole?</h3>
When a star burns through the last of its fuel, the object may collapse, or fall into itself. For smaller stars which are about three times the sun's mass, the new core will become a white dwarf but when a larger star collapses, it turns into a black hole.
So we can can conclude that a star will ultimately become a black hole when it collapses due to end of fuel.
Learn more about star here: brainly.com/question/10597324
8 km is not a speed. And even if it were, we would still need to know how much time Charlie spent running.