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a) When placed in a water of density 997 kg/m3, a hollow sphere of inner radius 10cm and outer radius 11cm floats with half of its volume below the level of the free surface of the water. Compute the density of the material the sphere is made.
b) When placed in oil this sphere floats 60% of its volume below the level of the free surface of the oil. Compute the density of the oil.
On a frictionless table, a glob of clay of mass 0.42 kg strikes a bar of mass 1.98 kg perpendicularly at a point 0.39 m from the center of the bar and sticks to it. At what angular speed does the bar/clay system rotate about its center of mass afte..
A tuning fork vibrating at 516 Hz falls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork while waves with a frequency of 489 Hz reach the release point? Take the speed of sound in air to be 340 m/s.
suppose a van de graaff generator builds a negative static charge and a grounded conductor is placed near enough to it
You are designing a delivery ramp for crates containing exercise equipment. Calculate the maximum force constant of the spring kmax that can be used in order to meet the design criteria
A quarterback takes the ball from the line of scrimmage, runs backwards for 15 yds, then runs sideways parallel to the line of scrimmage for 13 yds. Find the total magnitude of the football resultant displacement
Two masses connected by a rope are being pulled along a frictionless floor by a Force of 10 N. obtain the tension in the rope connecting the two masses
A series RLC circuit has a resonance frequency of 102.048 Hz. When it is operating at a frequency of w>wo, XL = 15.6 ohms, and Xc = 11.7 ohms. Calculate the inductance for the circuit in units of mH
Every 5 seconds between a lightning flash and the following thunder gives the distance to the flash in miles. Assuming the flash arrives quickly, estimate the speed of sound in m/s from this rule. What would be the rule for kilometers?
A magnetic field has a magnitude of 0.0011 T, and an electric field has a magnitude of 3.6 × 103 N/C. Both fields point in the same direction. A positive 2.3-?C charge moves at a speed of 4.1 × 106 m/s in a direction that is perpendicular to both fie..
One particle has a mass of 4.59 x 10-3 kg and a charge of +7.03 ?C. A second particle has a mass of 8.88 x 10-3 kg and the same charge. Find the initial separation between the particles
If an piece of Iron (c = 450 J/kg C) at 65.00 C is dropped into .250 kg of ethyl alcohol at 25.00 C and the final temperature of the two comes to 35.00 C what was the mass of the piece of iron
Write down your expression in terms of the dipole moment. Express your reply in terms of, and appropriate constants.
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