3 years ago

Exercise 28.41

1 answer:

5 0

Part A.
In order for the net magnetic field at the center of the circles to be zero, the individual magnetic fields produced by the wires must cancel each other. So in terms of direction, they must be opposite. The answer is:
The currents direction must be counterclockwise

Part B
We have the relationship:
I₁/D₁ = I₂/D₂

10/24 = I₂/38

I₂ = 15.83 A

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An object is dropped from a height of 25 meters. At what velocity will it hit the ground?

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Data:
h=25 m
v₀=0 m/s
g=9,8 m/s²

we use this formula
h=h₀+v₀.t+(1/2).g.t²
25 m=0 m+0 m/s.t+(1/2).(9,8 m/s²).t²
25 m=4,9 m/s².t²
t²=25 m /4,9 m/s²
t²=5,1 s²
t=√(5,1 s²)=2,26 s

Now, we calculate the última velocity
v=v₀+gt
v=0 m/s+9,8 m/s².(2,26 s)=22,14 m/s≈22 m/s

solution: c.) 22 m/s

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4 years ago

A force vector has a magnitude of 599 newtons and points at an angle of 40.8° below the positive x axis. What is the x scalar co

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Answer:

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