Answer:
The electric field between the plates is 1875 V/m.
Explanation:
Given that,
Separated d=1.6 cm
Potential of negative plate = 0 V
Potential halfway between the plates = 15 V
We need to calculate the total potential
Using formula of potential
Put the value into the formula
We need to calculate the electric field between the plates
Using formula of electric field
Direction is negative as the field always points from positive to negative plate
Hence, The electric field between the plates is 1875 V/m.
Potassium is the 19th element so it is B
Ohm’s law says V=IR so if V is 120 and I is 1.7 divide voltage by current and your left with roughly 71
To determine whether an object is in motion or not, you first
need to specify a reference point, because there's no such
thing as "real" motion, only motion relative to something.
Once you've named the reference point, you have to look at
the object at two different times. Each time you look at it, you
measure its distance and direction from the reference point.
If there's any difference in these measurements from one time
to the next, then the object has had average motion during the
period between the two observations.
That's the best you can do ... find average motion during some
period of time. You can never definitely tell whether or not the
object ever stopped during that time. But you can sneak up on
it by making the time period between the two observations shorter
and shorter.
