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You put a voltage across a metal wire and examine the progress of a group of electronsthat begin at a certain point. You notice that after 4 secondsthey have gone an average distance of 0.10m in the +x direction through the wire and have spread out to the point where their standard deviation about this location is 10^-3m. They undergo 10^12 collisions per second.
a) What is the average distance gone in the +x direction between any two successive collisions?
b)What is the standard deviation for the average distance traveled between any two successive collisions?
c) If the density of conduction electrons is 10^27 m^3 and the wire has a radius of one millimeter, what is the electrical current through this wire?
David is driving a steady 24 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant while David passes. How far does Tina drive before passing David.
A spring of force constant k=2.5*10^2 N/m is suspended form a rigid support. An object o mass 1.00 kg is attached to the uns How far below the starting point is equilibrium position for the object.
How long will a radar signal take to complete a round trip between earth and mars when the two planets are 0.7 AU apart.
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
A helicopter flies at a constant altitude towing a mass M of 119 kg. The helicopter and the mass have a horizontal acceleration of 2.54 m/s^2. Ignore air resistance find the tension in the cable.
A particle oscillates with S.H.M. The maximum displacement from its mean position is 0.5 meter and frequency of motion is 10 Hz. at time t=0, particle is located at 0.15 meter and has the velocity of 24.0 m/s towards the negative x-axis.
Find out the potential difference between a point.
A 69-kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted in place.
A cell membrane is composed of lipid molecules and approximately 10.48 nm thick. If the dielectric constant of the lipid is k = 5, what is the approximate capacitance of a spherical cell that has a diameter of 10.48 mu m?
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
A three-phase synchronous generator is connected to a step-up transformer T1, which is connected to a 60km long transmission line. As the far end of the line, a step-down transformer bank T2 is connected. The secondary of T2 supplies two loads L..
make Use of a 9.81 m/s^2 for the magnitude of the acceleration due to gravity.
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