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Careful measurements of local variations in the acceleration due to gravity can reveal the locations of oil deposits. Assume that the Earth is a uniform sphere of radius 6370 km and density 5500 kg/m3, except that there is a spherical region of radius 1.2 km and density 830 kg/m3, whose center is at a depth of 2.4 km. Suppose you are standing on the surface of the Earth directly above the anomaly with an instrument capable of measuring the acceleration due to gravity with great precision. What is the ratio of the acceleration due to gravity that you measure compared to what you would have measured had the density been 5500 kg/m3 everywhere? (Hint: Think of this as a superposition problem involving two uniform spherical masses, one with a negative density.) Ratio = 1 ?
A non-uniform bar 5 meters has a center of gravity 1 meters from the heavy end. If it is placed on the edge of a block 1 meters from the light end and a weight of 1497N is placed at the light end of the bar, it will be balanced. What is the weight..
A beam of light with red and blue components of wavelengths 670 nm and 425 nm, respectively, what is the index of refraction of the blue light
a 45.6 g sample of a conducting material is all that is available. the resistivity of the material is measured to be
The rotor in a certain electric motor is a flat, rectangular coil with 88 turns of wire and dimensions 2.33 cm by 4.20 cm, What is the average power of the motor
q1. two thin wedding bands each with mass m and radius r are welded together so that each ring passes through the
I place a 4cm-high object 10cm in front of a 10cm focal length concave lens. How tall is the image
A charge of -270e is uniformly spread through the volume of a sphere of radius 2.10 cm. What is the volume charge density in that sphere
A helium-neon laser beam has a wavelength of 633 nm in air. What is the wavelength of the light in that liquid
On planet Tehar, the freefall accelration is the same as that on Earth, but there is also a strong downward eletric field that is uniform close to the planet's surface. A 2 kg ball having acharge of 5 micro Coulombs is thrown upward at a speed of ..
atom X moves to the right at .99c and atom Y moves to the left at .99c according to an observer
now three masses m1 3.1 kg m2 9.3 kg and m3 6.2 kg hang from three identical springs in a motionless elevator. the
A heavy crate is attached to the wall by a light rope. Another rope hangs off the opposite edge of the box. If you slowly increase the force on the free rope by pulling on it in a horizontal direction, which rope will break? Ignore friction and th..
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