Answer:
The amount of sodium- 24 remain after 90 hours of decay is 8.90 gram
Step-by-step explanation:
Given as :
The amount of sodium-24 = 900 gram
The decay rate of sodium is 5 %
The time period for its decay = 90 hours
Or,
Or, Final value of sodium -24 = 900 g ×
Or, Final value of sodium -24 = 900 g ×
∴ Final value of sodium -24 = 8.899 gram
Hence The amount of sodium- 24 remain after 90 hours of decay is 8.90 gram Answer
<u>Answer</u>-
<em>The total capacitive reactance of the circuit is </em><em>7.96 Ω.</em>
<u>Solution-</u>
Two capacitors, a 20 mF and a 30 mF, are connected in parallel to a 400 Hz source.
The effective/equivalent capacitance of the circuit is,
As, when capacitors are connected together in parallel, the equivalent capacitance in the circuit is equal to the sum of capacitance of all the individual capacitor.
We know that,
Where,
= Capacitive Reactance (in Ω)
f = frequency (in Hz)
C = Capacitance (in F)
Here given,
= ??
f = 400 Hz
C = 50 mF = F
Putting the values in the formula,
Therefore, the total capacitive reactance of the circuit is 7.96 Ω.