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Electrostatic clamps are used for holding workpieces while they are being machined, for holding silicon wafers during electron beam microfabrication, etc. They comprise an insulated conducting plate maintained at a potential of several thousand volts covered with a thin insulating sheet. The workpiece or the wafer rests on the sheet and is grounded. It is advisable to apply a film of oil to the sheet to prevent sparking.
One particular type operates at 3000 volts and has a holding power of 2 atmospheres (2 x 10^5 pascals). If the insulator is Mylar (relative permittivity = 3.2), what is its thickness?
What is the upward force exerted by the ground on him treating it as a constant? Find work done by normal reaction from ground.
A 11 g bullet is fired into a 12 kg wood block that is at rest on a wood table. The block, with the bullet imbedded slides 5.0cm across the table. The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the speed of the bullet?
A turtle ambles leisurely-as turtles tend to do-when it moves from a location with position vector r1,x = 1.49 m and r1,y = -2.77 m in a lettuce garden to another location, find the magnitude of the turtle\'s average velocity
a 112-cm-long rod is rotating around its center. its mass is 291 g and its angular velocity is 30 rads. suddenly for no
The cable supporting a 1950 kg elevator has a maximum strength of21920 N. What maximum upwardacceleration can it give the elevator without breaking
A gamma-ray telescope intercepts a pulse of gamma radiation from a magnetar, a kind of star with a spectacularly large magnetic field. The pulse lasts 0.16 s and delivers 9.5 x10 -6 J of energy vertically to the 59-m 2 surface area of the telescope..
Determine what is the magnitude of electrical field 0.1 centimeter from the centre of a sphere of radius 40 centimeter with a total positive charge of 26 μC
a 1300- kg car rolling on a horizontal surface has speed v 60kmh when it strikes a horizontal coiled spring and is
Light passes through a diffraction grating with 3550 lines/cm and forms a first-order maximum at an angle of 12.07°. At what angle will the second maximum appear
electrons produced by a certain device are observed to travel in a circular path with a radius of 2.0 cm when placed in
The ripples in a certain groove 16.3 centimeters from the center of a33-rpm phonograph record have a wavelength of 1.26 millimeters. Find what will be the frequency of the sound emitted
For the wires shown in the Figure below, the wires on the left carry a current of I1 = I2 = 1.6A (out of the page), the wire on the right carries a current of I3 = 3.2A (into the page), a = 0.16 m and b= 0.34 m.
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