Answer:
Sirius
Explanation:
On the HR diagram Sirius is the closet.
Answer:
15volts
Explanation:
According to ohms law, the current passing through a metallic conductor at constant temperature is directly proportional to the potential difference across its ends. Mathematically,
E = IRt
E is the source voltage
I is the total current
Rt is the effective resistance.
Before we can get the voltage drip across a load, we must know the current flowing through it.
Given E = 90V
Rt = 5+10+15 (for a series connection)
Rt = 30Ω
I = E/Rt
I = 90/30
I = 3A
Note that In a series connected circuit, same current but different voltage flows through the circuit.
Therefore the current in the 5Ω resistor is also 3A.
To get the voltage drip across the 5Ω resistor we use the formula
V=IR
V = 3(5)
V = 15volts
To solve the problem it is necessary to apply the concepts related to the flow rate of a fluid.
The flow rate is defined as
Where,
v = Average speed (m / s)
And also as
Where,
V = Volume
t = time
Let's start by finding the total volume according to the given dimensions, that is to say
The entire cycle must be completed in 50 min = 3000s
In this way we know that the must be filled in 3000s, that is to say that there should be a flow of
Using the relationship to find the speed we have to
Replacing with our values,
Therefore the air speed in the duct must be 4.88m/s