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A rectangular copper strip measures 1.0mm in the direction of a uniform 2.9T magnetic field. When the strip carries a 7.3A current at right angles to the field, the Hall potential across the strip is 1.2muV. Find the number density of free electrons in the copper.
If a boat and its riders have a mass of 1500kg and the boat drifts in at 1.4m/s how much work does Sam do to stop it
q1. a 4.00 x 100 g glass coffee cup is 22.0 c at room temperature. it is next plunged into hot dishwater at the
A charged isolated metal sphere of diameter 20.0 cm has a potential of 9000 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere
Light rays in a material with index of refrection 1.25 can undergo total internal reflection, Find this material's index of refraction when the required critical angle is 67.9°
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 2.20 × 10-11 m. Determine the kinetic energy of the electron.
A 3.8×10-24-kg particle is vibrating with simple harmonic motion with a period of 1.3×10-5 s and a maximum speed of 1.55×103 m/s. A) Calculate the angular frequency. B) Find the maximum displacement of the particle. I know the answer to part A) 48..
The speed of a transverse wave on a string is 450 m/s and the wavelength is 0.18 m. The amplitude of the wave is 2mm. How much time is necessary for a particle of the string to move through a total distance of 1 km.
A uniform-density 8 kg disk of radius 0.20 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with the constant force of 45 N through a distance of 0.7 ..
To test the effects of high acceleration on the human body, NASA has constructed a large centrifuge at the Manned Spacecraft Center in Houston. what must be the speed of the capsule
One of the moons of a planet orbits at a distance of 9375 km from the center of the planet. what is the period of the moon
A monoenergetic beam of neutrons, cp = 4 X 1 0 10 neutrons/cm2-sec, impinges on a target 1 cm2 in area and 0. 1 cm thick. How many neutron interactions per second occur in the target
Calculate the Q-value, recoil energy of the daughter nucleus and the kinetic energy of the alpha particle in the following alpha decays
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