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A radio station with a power of 16kW sends out an omnidirectional wave at 2.1MHz.
a) If the electromagnetic wave has an electric field of .34V/m, what is the magnetic field amplitude?
b) What is the wave intensity 6km away?
c) What is the electromagnetic wave's wavelength?
Harry Potter (55kg) is riding his broom north when a Slytherin casts a spell to knock him from the broom. what is Harry's velocity
A cube of copper with each edge having the dimension 12.7 mm, is put in a vise and squeezed by a force of 215 N exerted by either side of the vise. What is the stress in the copper cube
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An aircraft weighing 892 N is accelerated at 9.9 m/s/s for 5 seconds, What is the force required to launch the aircraft
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
A wedding ring (of diameter 1.99 cm) is tossed into the air and given a spin, resulting in an angular velocity of 23 rotations per second. what is the maximum induced potential difference in the ring
A baseball is thrown upwards with a speed of 15.0 m/s. How long does it take the baseball to reach its maximum height
A 500 g cart is released from rest 1.00 m from the bottom of a frictionless, 30.0 degree ramp. how far does it roll back up the ramp
A baton consists of a 10-cm rod of mass 200 g with small metal spheres, each of mass 100 g, on either end. Calculate the moment of inertia of the baton about an axis through the center of the rod and perpendicular to it
A concave mirror (f = 49 cm) produces an image whose distance from the mirror is one-fourth the object distance. Determine the object distance.
Two electrons are located at two of the vertices of an equilateral triangle, one at each vertex. What is the net electric field at the third vertex
A mass is trapped on the x-axis. Its potential energy is given by U=-2x^3 -3x^2 +12x. Where x is i meters and U is in joules. A) Determine an expression for the force that acts on the mass as a function of position.
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