Determine the magnitude of the current flowing through a 4.7 kilo ohms resistor if the voltage across it is (a) 1mV (b) 10 V (c)
1 answer:
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Answer:
Explanation:
firstly we have to find the frequency and then the angular frequency.
The frequency will be:
The angular frequency is:
ω
ω
ω
Now we can apply simple pendulum relationship
ω
make g the subject of the formula
Answer:
The correct answer is D. s₂=4s₁
Explanation:
The distance of a particle is given by:
where
s₀ is the initial position when t=0
v₀ is the initial speed when t=0
a is the constant acceleration
t is the time in seconds
Then, the position s₁ is given by:
As the particle starts from rest v₀=0 and we consider s₀=0, s₁ will be:
Furthermore, the position s₂ is:
In this case t₁=10 s and t₂=20 s (10 seconds later). In other words t₂=2t₁.
We replace the value of t₂ in the second equation (s₂):
Finally, we divide s₂ by s₁ to get the ratio: