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A 8.0-cm -diameter disk emits light uniformly from its surface. 20 cm from this disk, along its axis, is an 9.0-cm -diameter opaque black disk; the faces of the two disks are parallel. 20 cm beyond the black disk is a white viewing screen. The lighted disk illuminates the screen, but there's a shadow in the center due to the black disk.
What is the diameter of the completely dark part of this shadow?
Two long parallel wires carry currents of 3.31 A and 6.17 A. The magnitude of the force per unit length acting on each wire is 3.93 × 10-5 N/m. Discover the separation distance of the wires expressed in millimetres.
Charge 32nC is uniformly distributed along a thin, flexible rod of length 18cm. The rod is then bent into the semicircle shown in the figure (Figure 1) . Evaluate the electric field strength at the dot.
A large circular window and sight-glass is built into the side of a high pressure stirrer tank reactor. The diameter of the round window is 24 inches. The specific gravity of the liquid in the tank is 1.2 and the pressure in the vapor region above th..
a race car starts from rest on a circular track of radius 329 m. the cars speed increases at the constant rate of 0.770
An astronaut is stuck in space with no fuel for his thrusters. He is 250 m away from his ship and only has a heavy wrench in his possession. How long does it take the astronaut to reach his ship
block a of mass 3.6 kg is on block b of mass 6.6 kg. block b is on a frictionless surface and the coefficient of static
a 3.49 kg 25.33 cm diameter turntable rotates at 221 rpm on frictionless bearings. two 700 g blocks fall from above hit
a container is filled to a depth of 22.0 cm with water. on top of the water floats a 28.0-cm-thick layer of oil with
A block of ice weighs 100 N. You can lift the block vertically a distance of 2 m. You can also push the same block up a ramp that is 4 m long, What is the increase in the block's gravitational potential energy in each case
an aluminum rod with a square cross section is l.3 m long and 5.2 mm on edge.a what is the resistance between its
A pulley cable system on a construction site lifts 20,000 N concrete block to a height of 40 m. If this takes 2 minutes what is the power of the pulley cable system
A particle in an infinite one-dimensional square well with walls located at x = 0 and at x = a has a wave function given by the normalized wave function phi (x) = (2/sqrt(a)) [sin ((pi*x)/a)*cos((3*pi*x)/a)] Discover the uncertainty in the position. ..
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