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A 4.5V battery is connected to a wire made of three segments of different metals connected one after another: 12cm of copper wire, then 12cm of iron wire, then 15cm of tungsten wire. All of the wir
To measure signal propagation in a nerve in the arm, the nerve is triggered near the armpit. The peak of the action potential is measured at the elbow and then, 4.3 later, 23 away from the elbow at
Four identical particles of mass 0.975 kg each are placed at the vertices of a 4.29 m x 4.29 m square and held there by four massless rods, which form the sides of the square. What is the rotational
Derive an equation for centripetal acceleration starting with a particle moving with constant speed in a circle of radius r. In the space provided utilize vector calculus to derive this expression i
If the diameter of a lens is reduced, what happens to the magnification produced by the lens? I know that M = H'/H which would lead me to beleive that H is diameter and that they are inversley propo
The escape velocity of a bullet from the surface of planet Y is 1631 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.57 times that of Y, and its rad
The lifting force does work in raising the helicopter. An 790-kg helicopter rises from rest to a speed of 7.3 m/s in a time of 3.7 s. During this time it climbs to a height of 7.7 m. What is the ave
A truck is traveling at 11.1 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 14.0° with respect to the horizontal. The coefficient of kinetic friction between
A 3.80 muF capacitor that is initially uncharged is connected in series with a 7.60 k Ohm resistor and an emf source with 130V negligible internal resistance. Just after the circuit is completed, wh
What is the resistance in an RL circuit with L = 38.21 mH if the time taken to reach 83.0% of its maximum current value is 1.79 ms?
The ball travels straight upward. In the absence of air resistance, to what maximum height above the ground does the ball rise?
A slingshot fires a pebble from the top of a building at a speed of 11.1 m/s. The building is 30.5 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the p
A 16.0-mW helium-neon laser emits a beam of circular cross section with a diameter of 2.85 mm. (a) Find the maximum electric field in the beam. How would you determine the intensity if you knew the
A rescue helicopter lifts a 70-kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 12 m. a(a) What is the ten
An object undergoing parabolic motion travels 125 m in the horizontal direction before returning to its initial height. If the object is thrown initially at a 30° angle, determine the x componen
In both motions, net work is performed due to the combined action of the forces, and (a) Is more net work done during the dive or the climb? Explain your answer.
Find the wavelength of a particle of mass m and charge q accelerated through a potential difference V for the non-relativistic case and for the relativistic case. (no bullshit copied answers that h
Captain Carmen fires a pistol at captain black but the lead ball misses and hits the oak mast. If the .05kg ball is going a speed of 9 m/s, and the frictional force is 120N, then how deep will the b
If the magnetic dipole moment of the earth has magnitude 8.00 x 1023 J/T and we assume that the radius of the circular path taken by the charged particles is 3.50 x 106 m, what is the current produced
A current is now set up in the rod and the magnitude and direction of the current is such that weight of the rod is now offset and the tension in the springs is relaxed. Determine the magnitude of t
A copper strip 5.0 cm long, 1.3 cm wide and 2.0 mm thick moving in the x-y plane. The strip is in a magnetic field given (in vector form) by B = 4.6 T (-k). The Hall potential VH between points A an
If 60% of U.S. petroleum use goes for transportation, and 1% of this goes for buses, how much oil could be saved per year if all buses were eletrified (assuming the electrical energy was generated
What will a spring scale read for the weight of a 54- woman in an elevator that moves in free fall?
The amount of charge that is induced to flow around the circuit is measured to be 7.0 × 10-3 C. Find the magnitude of the magnetic field.