Study the free body diagram above. Which scenario below can best be described with this free body diagram? A. a cup is at rest o
n a table. B. a car coasts down a hill. C. a child drops a penny from the top of a building. Neglect air resistance. D. a bartender slides a glass of beer to a patron at the end of a bar. Neglect air resistance.
1 answer:
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Answer:
The total charge on the rod is 47.8 nC.
Explanation:
Given that,
Charge = 5.0 nC
Length of glass rod= 10 cm
Force = 840 μN
Distance = 4.0 cm
The electric field intensity due to a uniformly charged rod of length L at a distance x on its perpendicular bisector
We need to calculate the electric field
Using formula of electric field intensity
Where, Q = charge on the rod
The force is on the charged bead of charge q placed in the electric field of field strength E
Using formula of force
Put the value into the formula
We need to calculate the total charge on the rod
Put the value into the formula
Hence, The total charge on the rod is 47.8 nC.
Answer:
1.23917 m
0.14323 s
Explanation:
v = Speed of sound in dry air at 20 °C = 343.5 m/s
f = Frequency of note C# = 277.2 /s = 277.2 Hz
λ = Wavelength
Wavelength = 1.23917 m
Distance the wave needs to travel is 49.2 m
Time = Distance / Speed
Time taken for the sound to travel across the concert hall is 0.14323 s