In a fluid, all the forces exerted by the individual particles combine to make up the pressure exerted by the fluid
Due to fundamental nature of fluids, a fluid cannot remain at rest under the presence of shear stress. However, fluids can exert pressure normal to any contacting surface. If a point in the fluid is thought of as a small cube, then it follows from the principles of equilibrium that the pressure on every side of this unit of fluid must be equal. but if this were not a case, the fluid would move in the directions of the resulting force, So the pressure on a fluid at rest is isotropic.
Hope This Helps :D <span />
Answer:
![F_o=437Hz](https://tex.z-dn.net/?f=F_o%3D437Hz)
Explanation:
From the question we are told that:
Frequency of Turning fork ![F_t=440Hz](https://tex.z-dn.net/?f=F_t%3D440Hz)
Number of beats detected
Generally the equation for Original frequency
of the string is mathematically given by
![F_o=F_t-F_b](https://tex.z-dn.net/?f=F_o%3DF_t-F_b)
Where
Beat frequency
![F_b=1Hz*n\\F_b=1Hz*3](https://tex.z-dn.net/?f=F_b%3D1Hz%2An%5C%5CF_b%3D1Hz%2A3)
Therefore
![F_o=440-3](https://tex.z-dn.net/?f=F_o%3D440-3)
![F_o=437Hz](https://tex.z-dn.net/?f=F_o%3D437Hz)
We have,
- Mass of both students is 60 kg
- Surface area of heels of one student say A is 0.45 cm² = 0.45/10000 m²
- Surface area of heals of another student say B is 74 cm² = 74/10000 m²
And we know that,
Here, area is provided but the force applied will be due to the acceleration of gravity so,
- F = ma
- F = 60 × 9.8
- F = 588
Now, let us calculate the pressure applied by both students;
Pressure(Student A)
- P = 588/0.45 × 10000
- P = 58800 × 10000/45
- P = 1306.6 × 10000
- P = 1306000.0 pascal
Pressure(Student B)
- P = 588/74 × 10000
- P = 5880000/74
- P = 7837.83
From the above two solutions we can say that, Pressure(Student A) > Pressure(student B)
And thus we can also say that,
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Answer:
b.) All these technologies use radio waves, including high-frequency microwaves
d.) Microwave ovens emit in the same frequency band as some wireless Internet devices.
e.) The radiation emitted by wireless Internet devices has the shortest wavelength of all the technologies listed above.
f.) All these technologies emit waves with a wavelength in the range of 0.10 to 10.0 m.
Explanation:
For option D. The frequency range of microwave ovens is 2450 MHz = 2.4 GHz, which intersects with wireless internet technology with range of 2.4 to 2.6 GHz.
For E, wavelenght and frequency are inversely proportional. Wireless internet service has the greatest frequency band and hence the shortest wavelenght band.
For F, in all these radiations, the highest Freq is 2.6 GHz and the lowest is 40 MHz. Wavelenght is speed of light (3x10^8 m/s) divided by the frequency.
2.6 GHz = 2.6x10^9 Hz
Wavelenght = 3x10^8 ÷ 2.6x10^9 = 0.1 m
40 MHz = 40x10^6
Wavelenght = 3x10^8 ÷ 40x10^6 = 7.5 m
<span>This would be chemical energy that is
converted to heat. The heat from the wick melts the wax which gets
absorbed in the wick and then gets burnt (which is really oxidation) to
produce heat energy.</span>