Which questions? i need to see the actual question, did you like upload them to your profile now?
Answer:
59.4 N
Explanation:
The force exerted on a current-carrying wire due to a magnetic field perpendicular to the wire is given by
where
I is the current in the wire
L is the length of the wire
B is the strength of the magnetic field
Here in this problem, we model the strike as a current-carrying wire, so we have:
I = 49,500 A is the current
L = 1 m is the length (we want to find the force per each meter of length)
is the strength of the magnetic field
Therefore, the force on each meter of the current due to the magnetic field is:
Answer:
90.6 A
Explanation:
From ohm's law,
V = IR.................... Equation 1
Where V = Voltage of the source, I = current through the person, R = Total resistance
Make I the subject of the equation,
I = V/R............... Equation 2
From the question,
R = Resistance of the appliance + Resistance of the skin
R = 2552+96 = 2648 ohms.
Given:
V = 240 V, R = 2648 Ω
Substitute into equation 2
I = 240/2648
I = 0.0906 A
I = 90.6 mA.
Hence the current through the person = 90.6 A.
Average speed = (distance covered) / (time to cover the distance)
Tissa covered 60 meters in 10 seconds. Her average speed was
(60 m) / (10 sec) = 6 m/s.
That's the slope of the dotted line.
Lilly covered 60 meters in 8 seconds. Her average speed was
(60 m) / (8 sec) = 7.5 m/s .
That's the slope of the solid line.
Lilly covered the same distance in less time, and both girls
arrived at the finish line together. Technically, in science talk,
we would say that Lilly ran "faster", and her average speed
was "greater".
We can detect that by looking at the graph, because Lilly's line
has the characteristic of being "steeper", and we know that the
slope of the line on a distance/time graph is "speed".
