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The magnetic field of a plane-polarized electromagnetic wave is given by B=1.2*10^-6 Sin[2pi (z/240 – (t*10^7)/8)] in SI units . The field vector is B_ = B(z,t)[(i^+J^)/ 2^(1/2)]. Find the average power per square meter carried by the EM wave. Write the electric field vector. Compute the Poynting vector.
An 68.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
An ideal transformer has 255 loops in its primary coil and 125 loops in its secondary coil. what is the current in the secondary loop
A binary system consists of stars of masses m and 2m, separated by a distance L=3.00×1011 m. What is the centripetal acceleration of the other star
Electrons in a television's CRT are accelerated from rest by an electric field through a potential difference of 2.9 kV, What is the speed of the electrons
A body is traveling at 5.70 m/s along the positive direction of an x-axis. No net force acts on the body. What is the speed of the forward part
Two very small spheres are initially neutral and separated by a distance of 0.55 m. find Is the force attractive or repulsive
A rotating wheel requires 2.99-s to rotate through 37.0 revolutions. What is the constant angular acceleration of the wheel
Using the definition of entropy change, dQ = T dS, what is the entropy change of the hot reservoir
A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision?
At launch, the Space Shuttle weighs 4.5 million pounds (2.04 million kilograms). As the vehicle starts from rest on the launch pad, what force must this seat exert on him during liftoff
The fastest martial arts punch is 43.3 mph (69.6 km/h) and was achieved by John Ozuna (United States), How much force was generated by his punch
A 15.9g bullet traveling horizontally at 871m/spasses through a tank containing 14.5kg of water and emerges with a speed of 537m/s
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