Answer:
The detector temperature doesn't affect retention time
Explanation:
Retention time is one of the chromatographic parameters. Is defined as the time of a compound spends from injection to detection.
A solute in GC is added to the injector where is volatilized. When volatilized, it pass through a column until the detector.
The detector temperature doesn't affect retention time. To change retention time you must change injector temperature or column temperature. An increase in column or injector temperature results in a decrease in retention time.
Answer:
circuito paralelo
Explanation:
Siempre el circuito en paralelo dara una resistencia menor. Recuerda que las resistencias se suman en el circuito en serie, an cambio en el circuito en paralelo, la corriente se bifurca de manera de circular con mayor intensidad por las ramas que tengan menos resistencia, y tal situacion llevara siempre a producir una menor resistencia equivalente.
The volume of a substance can directly be calculated by
the ratio of mass and density. That is:
volume = mass / density
Since the mass is 4.5 kg or 4500 grams, therefore:
volume = 4500 g / (8.89 g / cm^3)
<span>volume = 506.19 cm^3</span>
Answer:
Explanation:
The kinetic energy of an object is 
, where 
is the mass of the object and 
is the velocity of the object.
The toy car's initial kinetic energy is 
.
After the child applies a 5N force on it in the same direction, its velocity will increase but its mass will stay the same.
To find the final velocity of the toy car, we can use kinematic equation 
We are given 
and 
.
To find acceleration:
.
Now substitute 
into 
to get 
.
Using this, we can find the final kinetic energy of the toy car is 
.
Thus, the change in kinetic energy is 
(one significant figure).
