speed=frequency*wavelength, so frequency=speed/wavelength. frequency=80*0.2
Frequency = 16 Hz
Answer:
Approximately (approximately ) assuming that the magnetic field and the wire are both horizontal.
Explanation:
Let denote the angle between the wire and the magnetic field.
Let denote the magnitude of the magnetic field.
Let denote the length of the wire.
Let denote the current in this wire.
The magnetic force on the wire would be:
.
Because of the term, the magnetic force on the wire is maximized when the wire is perpendicular to the magnetic field (such that the angle between them is .)
In this question:
- (or, equivalently, radians, if the calculator is in radian mode.)
- .
- .
- .
Rearrange the equation to find an expression for , the current in this wire.
.
Answer:
He can throw it away from himself.
Explanation:
Newtons Third Law says that everything has an equal, yet opposite reaction on other objects.
I solved it and got 374.2N so i would put 375N
sorry i didn’t get any of the ones on there, i probably made a mistake.
A. Move 2 m east and then 12 m east; displacement is 14 m east and the distance is 14 m
B. Move 10 m east and then 12 m west, the displacement is 2 m west and the distance is 22 m.
C. Move 8 m west and then 16 m east; the displacement is 8 m east and the distance is 24 m
D. Move 12 m west and then 8 m east; the displacement is 4 m and the distance is 20 m