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A bead is able to slidealong a small wirein the form of a parabola. the parabola is rotating with constant angular velocity about it vertical symmetrical axis. write down the equation of motion of the bead.
Electrons are ejected from a certain metallic surface with speeds ranging up to 4.2 105 m/s when light with a wavelength of ? = 615 nm is used. What is the work function of the metal?
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below, Find the magnitude of the net force exerted by the wire on the crooked tooth
How man electrons are present in a 1.5C charge? Determine the mass of the 1.5 C charge. 1e=9.1x10^-31kg. determine the resistivity constant if the wire has a cross sectional area of 2x10^-5 m^2
Two identical guitar strings are prepared such that they have the same length (2.43 m) and are under the same amount of tension. find the wave propagation speed on the guitar strings
A long straight wire carries a 40.0 A current in the +x direction. What is the force on the electron at this instant
A coil with an inductance of 16.8 H and a resistance of 5.5 ? is suddenly connected to a resistanceless battery with an ? = 194.0 V. What is the rate at which thermal energy is appearing
A 0.123-kg ball is dropped from a height of 1.19 m and lands on a light (approximately massless) cup mounted on top of a light, What is the required spring constant of the spring
A 1.4 kg object at x= 2.00m, y = 3.10m moves at 3.96 m/s at an angle of 45 degrees north of east. Calculate the magnitude of the object's angular momentum
A volltage drop of 0.00039 V is measured across a 1.2 m long piece of copper wire when 10 mA of current passes through it. What is the resistivity of copper
Earthquakes at fault lines in Earth's crust create seismic waves, which are longitudinal (P-waves) or transverse (S-waves). Estimate the average bulk modulus of Earth's crust given
A group of charges is found in space. At a distance of 100 cm from the group of charges, the total electric flux through a Gaussian sphere is found to be 517 N·m2/C. What is the potential along the Gaussian sphere
A resistor of unknown resistance and a 48.0-? resistor are connected across a 128.0-V emf device in such a way that an 10.0-A current flows
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