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Question: A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz.
a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude?
b. What is the intensity of the wave at 5 km?
c. What is the wavelength of the electromagnetic wave?
A bullet is fired horizontally with an initial velocity of 900m/s at a target located 150 m/s which takes .167 seconds to reach. Using the approx value of g=10 m/s2, how far does the bullet fall in this time.
Calculate the linear speed due to the Earth's rotation for aperson at a point on its surface located at 40 degrees N latitude.The radius of the Earth is 6.40 x 10^6 m
A battery of ? = 2.70 V and internal resistance R = 0.700 ? is driving a motor. The motor is lifting a 2.0 N mass at constant speed v = 0.50 m/s. Assuming no energy losses, find the current i in the circuit. Enter the lower current.
Compute the angular momentum of the earth arising from the following motions Earth's orbital motion around the sun
Suppose that a binary-star system consists of two stars of equal mass. What is the mass of each
When chasing a hare along a flat stretch of ground, agreyhound leaps into the air at a speed of 10.9 m/s, at an angle of 25° above the horizontal. What is the range of his leap
A constant net force of 75N acts on an object initially at rest as it moves through a parallel distance of 0.60m. What is the final kinetic energy of the object
A tennis ball is dropped from a height of 190 cm above theground. It has a mass of .0572 kg. How can I figure out the speedof the ball just before it hits the ground, and the speed of theball just before it leaves the ground, using the conservation o..
A discus thrower accelerates a discus from rest to a speed of 24.9 m/s by whirling it through 1.22 rev. Calculate the final angular speed of the discus
1 mole on an ideal gas is at a pressure of 10 atm and a temperature of 30C. What is the volume of that gas in cubic meters
What will transform in terms of the observable properties of the black hole as this process continues
For a string stretched between two supports, two successive standing-wave frequencies are 505Hz and 630Hz . There are other standing-wave frequencies lower than 505Hz and higher than 630Hz.
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