The answer is D. A planet
Time is being measured in days here so if you want to calculate the rate of increase after one day, substitute 1 for t in your rate equation:
dB/dt = 0.677598 cos(1.232(1))
dB/dt = 0.22
Answer:
4 ohm
Explanation:
The equivalent resistance (Re) of three resistors in parallel is given by;
1/Re = 1/R1 + 1/R2 + 1/R3
Where; R1 = 16 ohm, R2 = 16 ohm, R3 = 8 ohm
1/Re= 1/16 + 1/16 + 1/8
1/Re= (0.0625) + (0.0625) + (0.125)
Re= 4 ohm
Answer:
I = 4.11 10⁻¹² A
Explanation:
For this exercise we can use Ampère's law, which relates the magnetic flux to the current inside the surface and the magnetic permeability
∫ B. ds = μ₀ I
Let's write a surface that is a circle around the neuron, in this case the direction of the field and the displacement vector are parallel, which reduces the scalar product to an ordinary product
∫B ds = μ₀ I
The field is constant so we take it from the integral that is immediate
B ∫ ds = μ₀ I
B 2π r = μ₀ I
I = B 2π r / μ₀
I = 1.28 10⁻¹⁵ 2π 0.0642 / 4π 10⁻⁷
I = 4.11 10⁻¹² A