Answer:
C. 1.04%
Explanation:
The following information has been provided;
Actual density of gold; 19.3 g/cm^3
Observed/measured density of gold; 19.1 g/cm^3
The formula for percent error is given as;
((actual value - observed value)/actual value)) * 100
![\frac{19.3-19.1}{19.3}*100=1.0363](https://tex.z-dn.net/?f=%5Cfrac%7B19.3-19.1%7D%7B19.3%7D%2A100%3D1.0363)
The percent error of the student's measurement is thus 1.04%
Answer:
t_total = 6.99 s
Explanation:
It asks us how long it takes to hear the sound, for this we must look for the time (t₁) it takes for the sound to reach the microphone, the time it takes for the video signal (t₂) to reach the television and the time (₃) it takes for the TV sound to reach us, so the total delay time is
t_total = t₁ + t₂ + t₂
we look for t1, it indicates that the distance x = 22m
v = x / t
t = x / v
t₁ = 22/343
t₁ = 6.41 10-2 s
time t₂
t₂ = 4500 103/3 108
t₂ = 1.5 10-5 s
time t₃
t₃ = 2/343
t₃ = 5.83 10⁻³
Total time is
t_total = t₁ + t₂ + t₃
t_total = 6.41 10⁻² + 1.5 10⁻⁵ + 0.583 10⁻²
t_total = 6.99 s
All except A. (Answer is B,C,D)
All other administrative job which helps to support and ensure that the medical services of a healthcare organization is running but are not the actual practitioner of first hand treatment to the patient physically.
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
.