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A large flat disk lies in a horizontal plane, free to rotate about a vertical pivot at its center. A string is attached to the disk 40cm east and 30cm north of the pivot, and pulled directly south-east with a force of 20N. What is the magnitude and direction of the torque exerted on the disk, about the pivot?
A thin glass (n = 1.47)converging lens for which the radii of curvatureare R1 = 15.0 cmand R2 = -13 cm. Determine the area of this image
Three forces in the x-y plane act on a 5.80 kg mass: 15.30 N directed at 59o, 12.20 N directed at 170o, Calculate the direction of the resultant force using the same sign convention as above
A 5.65 kilogram ball hangs from the top of a vertical pole by a 2.05-m-long string. Calculate the angle, between 0° and 90° that the string makes with the pole. Take g = 9.81 m/s2
The chamber of a rock-tumbling machine is a hollow cylinder withmass 60 g and radius 7.1 cm. The chamberis closed off by end caps in the form of uniform circular diskseach of mass 22 g.
The distance between the objective and eyepiece lenses in a microscope is 20 cm. The objective lens has a focal length of 5.0 mm. What eyepiece focal length will give the microscope
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 181 MeV, How many nuclei are in the beam
If points A and B in the figure below are connected to a 10 V battery, what is the power dissipated in each of the resistors assuming that R = 65 .
A particle of mass m strikes a wall at an angle θ with respect to the normal. The collision is inelastic with coefficient of restitution E. Find the rebound angle of the particle after collision with the wall.
a 13.5-kg box slides over a rough patch 1.75 m long on a horizontal floor. just before entering the rough patch the
A block of mass m=5kg is pulled up a frictionless ramp (theta=30degrees) at constant speed v=2m/s by an unknown tension force T. At what rate is the tension force doing work
Suppose you are allowed to use these the same type of lenses with what ever focal length you need. What type of devise you can build with these two lenses?
A wooden block weighing 9 N is at rest ontop of a wooden desk. The coefficient of static friction betweenthe block and the desk is 0.54. Find the minimum horizontal force required to move the block if the following occurs.
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