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A possible means for making an airplane invisible toradar is to coat the plane with anti-reflective polymer. If radarwaves have a wavelength of 3.59cm and the index of refraction ofthe polymer is n= 1.54, how thick must the coating be?
A 80-kg driver can decrease his rotation rate in a flip from an initial rate of 3.0rev/s to a final rate of 1 rev in 2 sec by straightening his body. find his final moment of inertia, then find his initial moment of inertia
If you had a single polarizer, how might you determine whether or not light from a room light was polarized when emitted from the bulb.
The nonconducting spherical shell is replaced with a thin metal spherical shell of diameter 8 cm and a charge of 1.00, What is the net electric field at 50 cm on the positive x axis
The distance traveled is dependent on the initial velocity, the acceleration and the time of travel. What is the distance traveled during the last second
An athlete at the gym holds a 2.5 kg steel ball in his hand. His arm is 70 cm long and has a mass of 4-kg. What is the magnitude of the torque about his muster if he holds his arm straight out to his side, parallel to the floor.
Two cars B and C approach car A in opp directions with a speed of 54 km/h each. At a certain instant, when the distance AB is equal to AC, both being 1km, B decides to overtake A before C does.
An elevator (cabin mass 530 kg) is designed for a maximum load of 3100 kg, and to reach a velocity of 2.6 m/s in 3 s. what is the tension the elevator rope has to withstand
A total charge of 1.96 μC is distributed uniformly over anentire region, giving a charge per volume of 245μC/m3. A Gaussian surface encloses 1.23μC of that charge. What is the volume of that entireregion?
Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, find the electric potential energy of this system of charges
A copper rod has a length of 1.4 m and a cross-sectional area of 3.8 10-4 m2. One end of the rod is in contact with boiling water and the other with a mixture of ice and water. What is the mass of ice per second that melts
A 4.0-mm -diameter wire carries a 10A current when the electric field is 8.6×10?2V/m. What is the wire's resistivity
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to five times the Earth's radius before coming to rest momentarily
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