Homework Statement
An object with a charge of 0.920 C is placed at the center of a regular tetrahedron with 4 equivalent surfaces. What is the electric flux through one surface of the tetrahedron?
Homework Equations
For an n-sided polygon
Electric Flux = Charge / (n)(Eo)
The...
Homework Statement
A common flashlight bulb is rated at 0.3 A and 3.3 V (the values of current and voltage under operating conditions). If the resistance of the bulb's tungsten filament at room temperature (20.0 degrees Celsius) is 1.10 Ohms , estimate the temperature of the tungsten...
Homework Statement
The current in the electron beam of a computer monitor is 410 µA. How many electrons per second hit the screen?
Homework Equations
The Attempt at a Solution
A beam current of 410µA means that 410µC of charge strike the screen per second. This is equivalent to...
Homework Statement
Two charges, -20.6 microC and +4.2 microC, are fixed in place and separated by 3.3 m.
(a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the position of the positive charge.
(b) What would be the magnitude...
Homework Statement
In the figure below , what is the electric field at point P?
Homework Equations
F = k*(q1*q2)/r^2
The Attempt at a Solution
F = k*(2q^2) / (2d + d)^2
That is my attempt, but it's not a possible answer.. Any help is appreciated.
Homework Statement
Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 19°C as a source of heat and rejects waste heat to the water 0.100 km below the surface where the temperature is 4.1°C.
Homework Equations
eta = 1 - Tc / Th
The Attempt at...
Homework Statement
The displacement (in meters) of a wave is y = 0.37 sin((pi)t - 3.88(pi)x), where t is in seconds and X is in meters.
What is the displacement y when t = 34.4 s and x = 6.7 m?
Homework Equations
y = 0.37 sin(t - 3.88x)
The Attempt at a Solution
y = 0.37...