When light wavelengths hit the retina, we can see colors, mostly we see light because it bounces off surfaces, and that gives them their color.
So, the blank could be "light of wavelengths".
I think it’s Energy is lost when machines don’t work right.
Answer: v = 3.684 m/s
Explanation: The angular frequency (ω) of a loaded spring is given as
ω = √k/m
Where ω = angular frequency, k =spring constant = 11.9 N/m, m = mass of object = 40.1 g = 0.0401 kg.
The velocity of a simple harmonic motion is defied as
v = ω√A² - x²
Where A = Amplitude = 24.7cm = 0.247m and x = displacement.
For our question, we where asked to find velocity at half way, at half way, x = A/2
Hence at half way, x = 0.247/2 = 0.1235 m.
We need to get the value of angular frequency first.
ω = √(11.9/0.0401)
ω = √296.758
ω = 17.22 rad/s.
Then the velocity is
v = 17.22 √0.247² - 0.1235²
v = 17.22 √0.061009 - 0.01525225
v = 17.22 √0.04575675
v = 17.22 × 0.2139
v = 3.684 m/s
As the distance between two charged objects increases, the strength of the electrical force between the objects <em>decreases</em>.
Answer:
![\Rightarrow L=70 .03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20.03472%20cm)
Explanation:
For convenience, let's represent the thermal expansion coefficient by
, i.e.
.
Given that, for steel
°
,
initial length,
, initial temperature,
°
, and the final temperature,
°
.
Let the length of the rod at
°
be
.
Now, change in length, ![\Delta L=\alpha L_0 \Delta T](https://tex.z-dn.net/?f=%5CDelta%20L%3D%5Calpha%20L_0%20%5CDelta%20T)
![\Rightarrow \Delta L=\alpha L_0 (T-T_0)](https://tex.z-dn.net/?f=%5CRightarrow%20%5CDelta%20L%3D%5Calpha%20L_0%20%28T-T_0%29)
![\Rightarrow L-L_0=1.24\times 10^{-5}\times 70 (110-70)](https://tex.z-dn.net/?f=%5CRightarrow%20%20L-L_0%3D1.24%5Ctimes%2010%5E%7B-5%7D%5Ctimes%2070%20%28110-70%29)
![\Rightarrow L-70=1.24\times 10^{-5}\times 70 \times 40](https://tex.z-dn.net/?f=%5CRightarrow%20L-70%3D1.24%5Ctimes%2010%5E%7B-5%7D%5Ctimes%2070%20%5Ctimes%2040)
![\Rightarrow L=70 + 0.03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20%2B%200.03472%20cm)
![\Rightarrow L=70 .03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20.03472%20cm)
Hence, the length of the rod at
°
be
.