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Bowling balls can be made from a variety of substances and are required to have a circumference of roughly 27.0 inches. The construction of the ball typically consists of a high density core surrounded by a lower density shell. Suppose a bowling ball floats in water with half of its volume submerged. If the specific gravity of the shell is 0.600 and the specific gravity of the core is 0.260, calculate the thickness of the shell.
The 4 block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 77.
The bullet lodges in the forehead of the victim and comes to a rest. If the victim's head has a mass of 5 kg and was at rest before impact, what is the stress on the cervical vertebra
What is speed of the command module
Compute the velocity of the electron assuming that hydrogen is described by the Rutherford-Bohr model
A 2 meter wire carrying 0.9 A of current is at a 90 degree angle to a magnetic field. compute the strength of the field
A +45?C point charge is placed 42cm from an identical +45?C charge. How much work would be required for an external force to move a +0.70?C test charge from a point midway
An investigator collects a sample of a radioactive isotope with an activity of 4.4×105Bq . 72hourslater, the activity is 1.2×105Bq. What is the half-life of the sample
A positive charge moves in a region where the magnetic field is uniform, has a magnitude of 60 uT and points in the positive x direction. what is the radius of the resulting path
A thin film of MgF_2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular acceleration of the wheel
consider an electron with an initial speed v0 = 32 Mm/s (1 Mm = 1 megameter = 1000 km = 1E6 m), What distance d (in m) will the electron travel before it stops
imagine that you spill a cup (250 g) hot water, initially at 75 C, onto the cold ground on a winter fay, Calculate the net change in the entropy of the universe due to this process, and comment on the result
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