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A horizontal platform P is held by several rigid bars which are connected to a vertical wire. The period of oscillation of the platform is found to be 2.2 s when the platform is empty and 3.8 s when an object A of unknown moment of inertia is placed on the platform with its mass center directly above the center of the plate. Knowing that the wire has a torsional constant K = 20 lb . ft/rad, determine the centroidal moment of inertia of object A.
Two point charges totaling 7.50 µC exert a repulsive force of 0.250 N on one another when separated by 0.583 m. what is the smallest and largest charge
A student drops two metallic objects into a 32 g steel container holding 169 g of water at 29C. One object is a 486 g cube of copper that is initially at 58C, and the other is a chunk of aluminum that is initially at 6.9C. To the student’s surpris..
Objects with masses of 295 kg and a 595 kg are separated by 0.300 m. Find the net gravitational force exerted by these objects
An RLC circuit has a resistor (R=175 ohms), a capacitor (C=4.78 microFarads) and an inductor (L=32.1mH). The frequency of the current is 652 Hz. What is the total impedance in the circuit
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. (a) Assume that the Earth is a conducting sphere with charge on its surface.
A gremlin is a tiny mythical creature often blamed for mechanical failures. Suppose for a moment that a shrewd physicist catches one such gremlin and makes it work for her instead of against her.
a two-stage missile is fired vertically from rest with acceleration as shown in the graph. in 15 sec the first stage a
The box is open at the top and has edge length L = 66 cm. Find out (a) the x coordinate, (b) the y coordinate, and (c) the z coordinate of the center of mass of the box.
Two small insulating spheres with radius 5.50×10?2m are separated by a large center-to-center distance of 0.555m, What is the direction of the electric field at this point
An electron moves with horizontal velocity of 3.0 x 10^6 m/s as it enters a deflector inside a TV tube. Find the constant acceleration provided by the deflector
Two point like identical positive charges, all of mass .3 g are suspended as a pendulum and placed in the uniform electric field of a magnitude E=5*10^5 N/C directed upward. A length of a string is 30 cm. What is the magnitude of all charge?
What is the separation between the two atoms in this molecule if we model them as point masses? The mass of hydrogen is 1.67* 10^-27 kg and nitrogen is 2.33*10^-26 kg
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