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Two straight rods 60 centimeter long and 2 millimeter apart in a current balance carry currents of 18 Amp each in opposite directions. Find what mass must be located on the upper rod to balance the magnetic force of repulsion?
An airplane is flying at 600 km/h at an altitude of 2.0km. how far away is she from being directly below the airplane
Consider a balloon containing hydrogenmolecules at room temperature (20°C) and atmospheric pressure.If the balloon has a spherical shape with radius of 13 cm, what is the number of molecules in the balloon
We did an experiment with newtons third law where we pushed two carts together and measured the force exerted with a computer. We did it with springs in between the carts first, which showed the force of the carts to be equal.
a tiny .5 kg object moves on a frictionlesshorizontal table in a circular path of radius 1.0 m the angular speed is 6.28 rad/s the object is attached to a string ofnegligible mass that passes through a small hole in the table atthe center of the c..
a new planet which has ten times the mass of the earth and four times the radius.a what is the acceleration due to
Thunderclouds typically develop voltage differences of about 1×108 V. Given that an electric field of 3×106 V/m is needed to produce an electrical spark within a volume of air, estimate the length of a thundercloud lightning bolt.
A rail car of mass 4500 kg is moving with a velocity of 12.4 m/s collides with a stationary rail car of mass 6700 kg. What is the velocity of the two cars
A 7.05 bullet traveling at 520 m/s embeds itself in a 1.85kg wooden block at rest on a frictionless surface. Find the amplitude of the subsequent simple harmonic motion
A parallel circuit with a 12kΩ resistor, a 12.0 V battery and a capacitor has a time constant of 55 μs. Compute the capacitance of the circuit? Compute the time it takes for the energy stored in the capacitor to be two thirds of its maximum value?
Two steel guitar strings have the same length. String A has a diameter of 0.59 and is under 410.0 of tension. String B has a diameter of 1.5 and is under a tension of 800.0 . Find the ratio of the wave speeds, VA/ VB, in these two strings
A tuning fork with a frequency of 440 Hz is held above a resonance tube that is partially full with water. Assuming that the speed of sound in air is 342 m/s, for what three smallest heights of the air column will resonance occur?
A parallel-plate capacitor with circular plates of radius 0.20 m is being discharged. At what rate is the electric field between the plates changing
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