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A straight wire of length 1 m situated in free space carries a uniform current 10 cos 4p * 106t A.
(a) Calculate the amplitude of the electric field intensity at a distance of 10 km in a direction at right angle to the wire.
(b) Calculate the radiation resistance and the time-average power radiated by the wire.
Astrology is the study that believes and attempts to interpret the powers of heavenly bodies on human affairs. Why do you think astrology is so popular around the world, although it has failed all scientific tests of validity?
An archer fires an arrow by an initial velocity of 21 m/s at an angle of 50 from the horizontal. The arrow lands on a hill that is 5.0 m higher than its initial height. Ignore the effects of air resistance. What speed does the arrow have when it land..
a charge of -4.0 nc is at the origin and a second charge of 11.0 nc is at x 5.00 m. find the magnitude and direction
An illuminated test object is placed on an optical bench and a screen is placed 60 cm away. What is the focal length of the lens.
A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If a timer is started when its displacement is a maximum (hence x=8 cm when t =0), what is the displacement of the mass when t = 3.7s?
Part I: First, put yourself into the time of the American Revolution. What role would you play in the events - for example, a leader, a rebel, a supporter, an artist? You get to decide. How will you respond to the American Revolutionary efforts?
A 650 kg elevator starts from rest. It moves upward for 4.50 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. What is the average power of the elevator motor during this period
a 2 kg block travels around a 0.5m radius circle with an angular speed of 12 rad/s. what is the resulting torque
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
A string with a mass m = 6.00 g and a length L = 5.00 m has one end attached to a wall; the other end is draped over a small, what is the fundamental frequency of its vibration
Write the potential energy equation in the system shown below. The equation is a function of displacment (y) and angular displacement (theta) only. U(y,theta). Only the spring can change length.
A rocket is fired at a speed of 82.0 m/s from ground level, at an angle of 31.0 ° above the horizontal. The rocket is fired toward an 6.95-m high wall, which is located 18.0 m away.
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