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Antennas for radio transmission and reception are particularly effective if they're about a half-wavelength long. What's the appropriate length for an FM antenna, taking 98 MHz as a typical FM frequency? (You may have used such an antenna with your FM receiver.)
A system consists of three particles, each of mass 5.85 g, located at the corners of an equilateral triangle with sides of length 18.0 cm. What is the potential energy of the system?
If a satellite is placed in orbit about the earth at adistance 2.7 times the earth's radius, what will its velocity be? How many days will it take to circle the earth
One afternoon, you are playing on a wooden basketball court with a hula-hoop to amuse yourself. find the hoop's speed just before it hits the wall
An electron on from the sun enters the earth's magnetic field high above its surface and undergoes a cicular motion. Calculate the raduis of the circle
A 206 n sign hangs from the end of a 3.30 m long bar. find the two forces exerted by bolts A and B
The current through a 908 ohm resistor is 189 mA; to the nearest volt, what is the potential difference across the resistor
Use Equation m
If we drop a small metal sphere into the water and watch its motion, it will quickly reach terminal velocity. what is the Reynold's number of this sphere
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 6.75 10-7 m, What is the maximum acceleration of the eardrum
Two carts with masses of 10.60 kg and 2.50 kg, respectively, move in opposite directions on a frictionless horizontal track with speeds of 6.70 m/s and 3.50 m/s, in that order. The carts stick together after colliding head-on. Find the final speed of..
A rock is projected from the edge of the top of a building with an initial velocity of 17.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 93 m from the base of the building. The accelerati..
A converging lens can be used as a lighter (on a sunny day). If you want to use it to light a match, where should you put the match, What is the radius of the mirror
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