An electric field greater than about 3×106V/m causes air to break down (electrons are removed from the atoms and then recombine,
2 answers:
Answer:
Voltage, V = 3000 volts
Explanation:
Given that,
Electric field,
The gap between your finger and the doorknob is 1 mm
We need to find the voltage between your finger and the doorknob. We know that the relation between voltage and electric field is given by :
V = 3000 volts
So, the voltage between your finger and the doorknob is 3000 volts. Hence, this is the required solution.
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Answer:
DS = 13865.7[J/K]
Explanation:
We can calculate the energy of the rock, like the potential energy relative to the lake level. Which can be calculated by means of the following expression of the potential energy:
Therefore:
This energy is transformed into thermal energy.
we shall remember that isothermal heat transfer processes are internally reversible, so the entropy change of a system during one of these processes can be determined, by the following expression.
T = 5 + 278 = 283[K]
DS = 3924000 / 283
DS = 13865.7[J/K]
Answer:
The net charge is
Solution:
As per the question:
Mass of the plastic bag, m = 12.0 g =
Magnitude of electric field, E =
Angle made by the string,
Now,
To calculate the net charge, Q on the ball:
Vertical component of the tension in the string,
Horizontal component of the tension in the string,
Now,
Balancing the forces in the x-direction:
(1)
Balancing the forces in the y-direction:
where
g = acceleration due to gravity =
Thus
Use T = 0.1357 N in eqn (1):