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A sign has a mass of 1050 kg, a height h = 1 m and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. A guy wire at 23° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the wall is 1 m. Assume we rely upon friction between the wall and the rod to hold up the sign (there is no hinge attaching the rod to the wall). What is the smallest value of coefficient of friction? such that the sign will remain in place?
A coil of 35 resistor and inductance 20.5H is in series with acapacitor and a 200V(rms), 100Hz source. what is the voltage rms across the coil
Two cars are each traveling at 27.0 m/s, and they are approaching each other. What frequency of is heard by the driver of the other car
two very long coaxial conducting cylindrical shells have a potential difference 800 v. the inner cylinder has radius
an rlc series circuit is in resonance at 75hz . if you halve both the inductance and capacitance whats the new
q1. a hula hoop of radius 1.0m is in a uniform electric field with magnitude 1.4 x 102 nc. its normal is parallel to
The force lightly damped harmonic oscillator of mass, 0.062 kgs, driving force F0 = 4.4 N and linewidth 35 radians/second, Determine the new damping constant
An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If Bx=0, then what is the direction of the magnetic field? I got the positive y direction, but the answer is the negative y direction, why is ..
A billiard ball is moving east at 3.0 m/s. A second, identical billiard ball is shot west at 1.8 m/s. find the speed and direction of the first ball after the collision
A mode-locked, titanium-sapphire laser has a wavelength of 850 nm and produces 100 million pulses of light each second. What is the average power produced by the laser
Four equal masses M are placed at equal intervals, l, along a horizontal straight rod whose mass can be ignored. what is the direction of this force
A disk of radius 1.00 m is rotating with 5.39 rad/s and 5.39 rad/s2. What is the magnitude of the linear acceleration of a point on the outer edge of disk? (Give the answer in three significant figures and SI units)
A 5.000 kg mass starts from rest and slides down on an inclined plane that is 5 degrees above the horizontal. If the body starts from rest and takes 1.25 s to travel a distance along the inclined plane, what is the final velocity of the body
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