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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.
A vertical straight wire carrying an upward 24A current exertsan attractive force per unit length of 8.8e-4 N/m on a secondparallel wire 7cm away. What current (magnitude anddirection) flows in the second wire
suppose a parallel plate capacitor with capacitance c1 is fully charged to a value qo by a battery. the battery which
To stir a mixture of liquids consistently and gently, abiologist designs a simple mechanical system consisting of ahorizontal spring attached to a beaker on the slippery Teflonsurface. What is the required spring constant
A group of particles is traveling in a magnetic field of unknown magnitude and direction. What is the direction of this the magnetic force
A box of mass is sliding down a frictionless plane that is inclined at an angle above the horizontal, as shown in the figure (Figure 2) . What is the work done on the box by the force due to gravity , if the box moves a distance ?
A mass attached to a spring is lifted 10cm and then let go at which point the mass bobs up and down completing 4 oscillations in 10 sec. When does the mass first reach its maximum speed and what is that speed?
a 20 micro f capacitor is fully charged across a 12v battery. the capacitor is then disconnected from the battery and
question an object weighing 335 n in air is immersed in water after being tied to a string connected to a balance. the
One fragment, whose speed immediately after the explosion is zero, falls vertically. Illustrate what is the horizontal speed of the other fragment?
A uniform horizontal beam has a mass of 241 kg and is 10.5 meters long. The beam also carries the following three loads: Load A: 4715 N, 1.26 meters from left end, What are the forces supporting the two ends of the beam
A 42.0-cm diameter wheel, consisting of a rim and six spokes, is constructed from a thin rigid plastic material having a linear mass density of 25.0 g/cm. This wheel is released from rest at the top of a hill 53.0 high. 1.
An 75 kg stuntman jumps from a window of a building situated 25 m above a catching net. Assuming air resistance exerts a 100-N force on the stuntman as he falls; decide his velocity now before he hits the net.
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