<h2>v = 2.5J/c</h2>
Explanation:
<h2>Given:</h2>
<h3>Energy = E = 20J</h3>
<h3>Charge = Q = 8C</h3>
<h2>Require :</h2>
___________
<h3>Potential Difference = V = ?</h3>
<h2>Formula :</h2>
____________
<h2>V =

</h2>
<h2>Solution:</h2><h3>_________</h3>
<h2>V =

</h2>
<h3>V = 2.5V</h3>
.
.
.
<h2>

</h2>
Answer:
The possible range of wavelengths in air produced by the instrument is 7.62 m and 0.914 m respectively.
Explanation:
Given that,
The notes produced by a tuba range in frequency from approximately 45 Hz to 375 Hz.
The speed of sound in air is 343 m/s.
To find,
The wavelength range for the corresponding frequency.
Solution,
The speed of sound is given by the following relation as :

Wavelength for f = 45 Hz is,


Wavelength for f = 375 Hz is,


So, the possible range of wavelengths in air produced by the instrument is 7.62 m and 0.914 m respectively.
Answer:
15000kgm/s
Explanation:
Given parameters:
Speed of the car = 12m/s
Mass of car and passengers = 1250Kg
Unknown:
Momentum of the car = ?
Solution:
Momentum is the quantity of motion a body posses;
Momentum = mass x velocity
Now insert the given parameters and solve;
Momentum = 12 x 1250 = 15000kgm/s
Answer:

Explanation:
Halogen group:This group contains Cl,F,Br and I
There are 7 electrons in the outermost shell of each element of halogen family.
Each element of this family required one electron to fill their complete outermost shell.
We know that

Cl=17=
Therefore, the general configuration for atoms of the halogen group is given by

They lower the average density of their body; because of the air it feels like a slight decrease in the weight.