Answer:
First, let's define the coordinate axes: positive x direction is to the right, positive y direction is to upwards, and z direction is out-of-the plane (towards you).
If the particle is moving with velocity in the presence of an external E-field, than according to the below formula E-field pushes the positive charge in the direction of the field, which is upward.
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If the velocity of the particle is unchanged, this means that the particle does not have an acceleration, so net force applied to the particle is zero.
We know that the force caused by the E-field is upwards, so an equal amount of another force is directed downwards. This second force is caused by magnetic field.
This is the magnitude of the magnetic field.
For the direction of the magnetic field we can use right-hand rule with the following equation:
Here, is in the x-direction. is in the (-y)-direction.
According to the right-hand rule, B-field should be in the z-direction (out-of-the plane, towards you.)
Explanation:
Watch in the diagram above that a downward vector will provide a partial or full cancellation of an upward vector.
And a leftward vector will provide a partial or full cancellation of a rightward vector.
In this case, as the meanings of the vectors are opposite, one of the forces receives the negative signal and thus a piece of the other vector is drawn, as shown in the figure. And to know the module of the resultant force, if it subtracts the modules of the forces.
Answer:
(in order to have a net force of 8 N, right) B. 8 Newtons
If a potassium atom loses one electron than it becomes a +1 charge, because the electrons are negative and the nucleus is positive (the positive comes from the protons). The protons and electrons balance out so it has a neutral charge, but if the atom loses an electrons it has a positive charge, but if the atom gains an electron than it becomes negative. the charge (+/- and the number) of the atom depends on how many electron the atom gains/loses.
the answer is (D.) +1
I hope this helps.
Answer:
the 5 pound ball on ice choice b
If C.) is meant to be refraction, it's C.)