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A thin uniform rod is rotating at an angular velocity of9.0 rad/s regarding an axis that is perpendicular to the rod at its center. As the drawing indicates, the rod is hinged at two places, one-quarter of the length from each end. Without the aid of external torques, the rod abruptly assumes a "u" shape, with the arms of the "u" parallel to the rotation axis. What is the angular velocity of the rotating"?
Two identical mandolin strings under 200 N of tension aresounding tones with frequencies of 523 Hz. How many beats per second are heard
The microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 4. 10-14 J/m3. What is the rms value of the electric field of this radiation
A large solar panel on a spacecraft in Earth orbit produces 1.8kW of power when the panel is turned toward the sun. What power would the solar cell produce
when an object is placed 57.0 from a certain converging lens it forms a real image. when the object is moved to 38.0
Two long, parallel wires are separated by a distance of 2.50cm . The force per unit length that each wire exerts on the other is 3.20×10?5N/m, determine the current in the second wire
A car is driven 125.0 km west and then 65.0 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
20g of Uranium Carbide (UC) of density 13.6 g/cm^3 is mixed with 15g of uranium dioxide of density 11.2 g/cm^3, Determine the atom densities of U-235 and U-238 in the fuel mixture
An electric vehicle starts from rest and accelerates at a rate of 1.8 m/s2 in a straight line until it reaches a speed of 29 m/s. How far does the vehicle move from start to stop
A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, determine the net torque acting on it
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How many electrons pass through the wires connected to the patient
White light is shone on a very thin layer ofalcohol (n=1.36), and above the alcohol layer, interference maxima for two wavelengths (and no other in between) are seen: onevioletwavelength of410nm, and oneredwavelength of670nm. What is the thickness..
1 although all atoms have moving electric charges not all materials are magnetic for example copper or wood are not
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