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An AM radio station broadcasts with a power of 28 kW at a frequency of 870 kHz. Find the intensity of the radio wave at a point 19 kilometer from the broadcast antenna.
(W/m2)
The centers of a 13.0 kglead ball and a 50.0 g lead ballare separated by 11.0 cm. What gravitational force does each exert on the other
A baseball player hits a double and ends up on second base. A baseball "diamond" is a square, each side of length 27.4 m, with home plate and the three bases on the four corners. What is the magnitude of the player's displacement?
Problem 12.30: Singing in the shower. We all sound like great singers in the shower, due to standing waves, What are the wavelengths of the first two overtones for this shower
The Moon has one fourth of the diameter of the Earth with just 1.25 % of its mass. Calculate the gravitational acceleration on the surface of the Moon
A converging lens with a focal length of 12.9 cm and a diverging lens are placed 25.5 cm apart, with the converging lens on the left. What is the focal length of the diverging lens
A block slides down a frictionless inclined ramp. If the ramp angle is 15o and the length of it is 19 meter, obtain the speed of the block as it reaches the end of the ramp
The escape speed from the Earth is 1.12*104 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth's atmosphere would, at this speed, be able to escape from the Earth's gravitational field and be lost to the atmos..
At the equator, near the surface of the Earth, the magnetic field is about 34.0 µT northward, and the electric field is about 290 N/C downward in fair weather. Discover the gravitational, electric, and magnetic forces on an electron by instantaneous ..
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 91 kg and a length L = 3.2 m, What is the location of the center of mass of the system
A freight train has a mass of 1.3 * 10^7 kg. how long doesit take to increase the speed of the train from rest to 90km/h
The weight of passengers on a roller coaster increases by 53 as the car goes through a dip with a 40 radius of curvature
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of..
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