What portion (division) of a meter stick is a centimeter?
2 answers:
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Answer:
<em>10.75 A</em>
<em>The current is in opposite direction since it causes a repulsion force between the wires</em>
Explanation:
Force per unit length on the wires = 4.30×10^−5 N/m
distance between wires = 2.6 cm = 0.026 m
current through one wire = 0.52 A
current on the other wire = ?
Recall that the force per unit length of two wires conducting and lying parallel and close to each other is given as
=
where is the force per unit length on the wires
= permeability of vacuum = 4π × 10^−7 T-m/A
= current on the first wire = 0.520 A
= current on the other wire = ?
r = the distance between the two wire = 0.026 m
substituting the value into the equation, we have
4.30×10^−5 = =
4.30×10^−5 = 4 x 10^-6
= (4.30×10^-5)/(4 x 10^-6) = <em>10.75 A</em>
<em>The current is in opposite direction since it causes a repulsion force between the wires.</em>
Answer:
T = (99.78 ±0.05) ºC
Explanation:
This problem refers to the procedure to perform the measurements and their correct reporting.
Suppose that the thermometer used has an appreciation of 0.1ºC and the values of 5 measurements resulted in
# T (ºC)
1 99.8
2 99.7
3 99.7
4 99.8
5 99.9
the processing calculate mean value
T_average = ∑ / n
T_average = (99.8 + 99.7 + 99.7 + 99.8 + 99.9) / 5
T_average = 99.78ºC
the absolute error or uncertainty of the measurement is half the appreciation of the instrument
ΔT = ± 0.05ºC
so the result must be written
T = (99.78 ±0.05) ºC