Homework Statement
The value of the Electric field at a distance of 82.8 m from a point charge is 75.3 N/C. Its direction is radially in toward the charge. The Coulomb constant is 8.98755 E9.
Find the magnitude and sign of the point charge at the origin. Answer in units C.
Homework...
hmm...good point, guess i shouldn't do this in my head. well, its 1.41421. Where Do i need to use it? I didn't have r in my final formula? where did i go wrong?
Homework Statement
http://img237.imageshack.us/img237/9041/snapshot20080325182105oh7.th.jpg [Broken]
Homework Equations
I don't know what to do without having x cancel out.
The Attempt at a Solution
Homework Statement
Homework Equations
The Attempt at a Solution
Homework Statement
Three point charges are located at the corner of an equilateral triangle. The Coulomb constant is 8.98755 X 109 N*m2 / C2
What is the strength of the electrostatic force on the top charge? Answer in units of N.
Length of each side is .19m
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Homework Statement
Four point charges are placed at the four corners of a square. Each side of the square has a length L.
Find the magnitude of the electric force on q2 due to all three charges q1 , q2 , q3
and q4. Given L=1 and q= 1.38 μC. Answer in N...
distance is 1.12μm , so
d=(1.12E-9) - (1.2E-9 * .004) =1.11552E-9
& i totally butchered the rest. I'm not sure what its supposed to look like
Fe=8.99E+9 * ? / 1.11552E-9
Then
Fs=kx
Fs*x =K
Homework Statement
A molecule of DNA lies along a straight line. It is 1.12 μm long. The ends of the molecule become singly ionized; negative on one end, positive on the other. The helical molecule acts as a spring and compresses .4% upon becoming charged.
The Coulomb constant is 8.99 X...
Homework Statement
Assume: Take the speed of sound in air to be 341 m/s.
A bat, moving at 6.3 m/s, is chasing a flying insect.
The bat emits a 47 kHz chirp and receives back an echo at 47.73kHz.
At what speed is the bat gaining on its prey? Answer in units of m/s.
Homework Equations...
Homework Statement
A train is moving parallel and adjacent to a highway with a constant speed of 25 m/s. A car, at time t0, is 42 m behind the train, traveling in the same direction as the train at 49 m/s, and accelerating at 4 m/s^2. The train's whistle blows at a frequency of 460Hz. The...