Answer:
ω₂ = 5.578 rads⁻¹
Explanation:
The moment of inertia of,
turn table = ![\frac{1}{2}mr^{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7Dmr%5E%7B2%7D)
block = ![mr^{2}](https://tex.z-dn.net/?f=mr%5E%7B2%7D)
By the law of conservation of angular momentum, as no external torque acts on system the total angular momentum of the system when block sits at center and when block at the outer edge must be same.
Also to find ω, ω = 2πf where f is rpm
= 2π×63/60 = 6.597
So
I₁ω₁ = I₂ω₂
(
+
)×6.597 = (
+
)×ω₂
ω₂ = 5.578 rads⁻¹
Answer:
308 m/s
Explanation:
In a closed tube, the length of the tube (L) is related to the wavelength of the standing wave (
) by the relationship
![L=\frac{1}{4}\lambda](https://tex.z-dn.net/?f=L%3D%5Cfrac%7B1%7D%7B4%7D%5Clambda)
In this problem, the length of the tube is L=20 cm=0.20 m, so we can find the wavelength of the standing wave:
![\lambda=4L=4 \cdot 0.20 m=0.80 m](https://tex.z-dn.net/?f=%5Clambda%3D4L%3D4%20%5Ccdot%200.20%20m%3D0.80%20m)
And no we can find the speed of the sound wave by using the following equation:
![c=\lambda f](https://tex.z-dn.net/?f=c%3D%5Clambda%20f)
where
is the frequency of the wave. So, we find
![c=(0.80 m)(385 s^{-1})=308 m/s](https://tex.z-dn.net/?f=c%3D%280.80%20m%29%28385%20s%5E%7B-1%7D%29%3D308%20m%2Fs)
Answer:
Both Technicians A and Technician B
Explanation:
According to Technician A, the bearings are lubricated by being submerged in gear fluid and it is done to keep bearings temperature low and keep friction low as well.
Technician B point of view is also correct as seals prevent any type of impurity to get inside oil. The feature of the oil seal is to forestall something fluid is inner from leaking out the clearance among the shaft and housing. The seal is also be used to save you outside materials, together with dirt, from shifting in via the clearance.
Answer:
Answer:
43.4J
Explanation:
We know that
Work done = total heat energy
But work done is force x distance
=> F = 19 x8.6 = 163.4 J
So the total heat. Will be Heat of cube + heat of floor = 163.4J
So that heat of floor will now be
floor = 163.4 J - 120 J = 43.4 Joules
Explanation:
I believe it is called the Greenhouse effect.