In physics class, Anne is designing a small circuit that can operate a mixer. Identify the devices she should use in the circuit
1 answer:
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Answer:
a)
b)
Explanation:
a)
The magnitude of the electric field generated by a charged particle at a distance r is:
With Q the charge of the particle and k the constant ()
So, the electric field generated by q1 knowing that the point 5.0 cm apart the negative charge is apart the positive charge is:
and the electric field generated by q2:
Those are the magnitudes of the electric field, but electric field is a vector quantity, so the direction is important. Electric field generated by negative particles points towards the charge and electric field generated by positive particles points away the particle. So, if we define positive direction towards negative particle (x-axis):
Vector quantities satisfy superposition principle, this is , with E the total electric field.
b) The force is:
,
with q the charge of an electron
Answer:
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Explanation:
From the exercise we know two information. The real speed and the experimental measured by the speedometer
Since the speedometer is only accurate to within 0.1km/h the experimental speed is
Knowing that we can calculate Kinetic energy for the real and experimental speed
Now, the potential error in her calculated kinetic energy is:
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