Answer:
Velocity = 120 km/h in north
Speed = 120 km/h
Explanation:
Given data:
Distance = 300 km north
Time taken = 2.5 hr
Speed and velocity = ?
Solution:
Speed = distance / time
Speed = 300 km / 2.5 h
Speed = 120 km/h
Velocity = change in position / change in time
Velocity = 300 km north / 2.5 hr
Velocity = 120 km/h in north
Answer:
FAS concentration = 1.61*10^-4M
Explanation:
Beer Lambert's law relates the absorbance (A) of a substance to its concentration (c) as:
![A = \epsilon lc----(1)](https://tex.z-dn.net/?f=A%20%3D%20%5Cepsilon%20lc----%281%29)
where ε = molar absorption coefficient
l = path length
A plot of 'A' vs 'c' gives a straight line with slope = εl
In addition absorbance (A) is related to % Transmittance (%T) as:
A = 2-log%T----(2)
For the FAS solution, the corresponding calibration fit is given as:
y = 3678(x) + 0.056
This implies that the slope = εl = 3678
It is given that %T = 25.6%
![A = 2-log(25.6)=0.592](https://tex.z-dn.net/?f=A%20%3D%202-log%2825.6%29%3D0.592)
Based on equation(1):
![c = \frac{A}{\epsilon l}=\frac{0.592}{3678}=1.61*10^{-4}M](https://tex.z-dn.net/?f=c%20%3D%20%5Cfrac%7BA%7D%7B%5Cepsilon%20l%7D%3D%5Cfrac%7B0.592%7D%7B3678%7D%3D1.61%2A10%5E%7B-4%7DM)
Solutions of acids and bases are good conductors of electricity because they are capable carrying current. Solutions of such substances have ions in the solution which can carry current through out the solution. Hope this answers the question.
Answer:
C. 10 W.
Explanation:
Hello!
In this case, since the power the person uses to lift the 10-N load is computed by using the formula:
![P=\frac{W}{t}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7BW%7D%7Bt%7D)
Whereas W is the work and t the time; we can compute the work by multiplying the force applied in 1 m:
![W=10N*1m=10J](https://tex.z-dn.net/?f=W%3D10N%2A1m%3D10J)
Now, we divide it by the time to obtain:
![P=\frac{10J}{1s}=10W](https://tex.z-dn.net/?f=P%3D%5Cfrac%7B10J%7D%7B1s%7D%3D10W)
Since joules over seconds are watts.
Best regards!