Answer:
If there is no damping, the amount of transmitted vibration that the microscope experienced is = ![5.676*10^{-3} \ mm](https://tex.z-dn.net/?f=5.676%2A10%5E%7B-3%7D%20%5C%20mm)
Explanation:
The motion of the ceiling is y = Y sinωt
y = 0.05 sin (2 π × 2) t
y = 0.05 sin 4 π t
K = 25 lb/ft × 4 sorings
K = 100 lb/ft
Amplitude of the microscope ![\frac{X}{Y}= [\frac{1+2 \epsilon (\omega/ W_n)^2}{(1-(\frac{\omega}{W_n})^2)^2+(2 \epsilon \frac{\omega}{W_n})^2}]](https://tex.z-dn.net/?f=%5Cfrac%7BX%7D%7BY%7D%3D%20%5B%5Cfrac%7B1%2B2%20%5Cepsilon%20%28%5Comega%2F%20W_n%29%5E2%7D%7B%281-%28%5Cfrac%7B%5Comega%7D%7BW_n%7D%29%5E2%29%5E2%2B%282%20%5Cepsilon%20%20%5Cfrac%7B%5Comega%7D%7BW_n%7D%29%5E2%7D%5D)
where;
![\epsilon = 0](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%200)
![W_n = \sqrt { \frac{k}{m}}](https://tex.z-dn.net/?f=W_n%20%3D%20%5Csqrt%20%7B%20%5Cfrac%7Bk%7D%7Bm%7D%7D)
= ![\sqrt { \frac{100*32.2}{200}}](https://tex.z-dn.net/?f=%5Csqrt%20%7B%20%5Cfrac%7B100%2A32.2%7D%7B200%7D%7D)
= 4.0124
replacing them into the above equation and making X the subject of the formula:
![Y * \frac{1}{\sqrt{(1-(\frac{\omega}{W_n})^2)^2})}}](https://tex.z-dn.net/?f=Y%20%2A%20%5Cfrac%7B1%7D%7B%5Csqrt%7B%281-%28%5Cfrac%7B%5Comega%7D%7BW_n%7D%29%5E2%29%5E2%7D%29%7D%7D)
![0.05 * \frac{1}{\sqrt{(1-(\frac{4 \pi}{4.0124})^2)^2})}}](https://tex.z-dn.net/?f=0.05%20%2A%20%5Cfrac%7B1%7D%7B%5Csqrt%7B%281-%28%5Cfrac%7B4%20%5Cpi%7D%7B4.0124%7D%29%5E2%29%5E2%7D%29%7D%7D)
![5.676*10^{-3} \ mm](https://tex.z-dn.net/?f=5.676%2A10%5E%7B-3%7D%20%5C%20mm)
Therefore; If there is no damping, the amount of transmitted vibration that the microscope experienced is = ![5.676*10^{-3} \ mm](https://tex.z-dn.net/?f=5.676%2A10%5E%7B-3%7D%20%5C%20mm)
Answer:
Resistance, ![R=0.529\ \Omega](https://tex.z-dn.net/?f=R%3D0.529%5C%20%5COmega)
Explanation:
Given that,
Voltage of the battery, V = 9 volts
Current produced in the circuit, I = 17 A
We need to find the resistance when shorted by a wire of negligible resistance. It is a case of Ohm's law. The voltage is given by :
![V=IR](https://tex.z-dn.net/?f=V%3DIR)
![R=\dfrac{V}{I}](https://tex.z-dn.net/?f=R%3D%5Cdfrac%7BV%7D%7BI%7D)
![R=\dfrac{9\ V}{17\ A}](https://tex.z-dn.net/?f=R%3D%5Cdfrac%7B9%5C%20V%7D%7B17%5C%20A%7D)
![R=0.529\ \Omega](https://tex.z-dn.net/?f=R%3D0.529%5C%20%5COmega)
So, the resistance in the circuit is 0.529 ohms. Hence, this is the required solution.
Answer: 7200 m
Explanation: The solution is, first convert 15 minutes to seconds.
15 mins x 60 s / 1 min = 900 s
Use the formula for speed which is v= d/t then derive for d.
d = vt
= 8 m/s ( 900s)
= 7200 m
First, we convert kcal to joules:
1 kcal = 4.184 kJ
475 kcal = 1987.4 kJ
Now, calculating the change in internal energy:
ΔU = Q + W; where Q is the heat supplied to the system and W is the work done on the system.
ΔU = -500 + 1987.4
ΔU = 1487.4 kJ
Velocity is about direction traveled in comparison to speed which is just distance with out direction