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Question: A 3 GHz line-of-sight microwave communication link consists of two lossless parabolic dish antennas, each 1 m in diameter. If the receive antenna requires 10 nW of receive power for good reception and the distance between the antennas is 40 km, how much power should be transmitted?
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. find the size of the image of the tree on your retina
A room containing 275 m3 of air at 1.00 atm pressure is to be humidified.- Determine the mass of water that must be added to the room air.
A proton (charge +e) moves a distance d = 0.50 m in a straight line between points a and b in a linear accelerator. Determine the potential difference
A positive charge of 0.800 µC is located in a uniform field of 1.15 × 105 N/C. How close are the two charges
An electron moves into a uniform magnetic field B = 0.182mT with initial speed with v = 12000m/s, What is the radius of the helical motion
Your friend has a near point of 129 cm, How close can she hold a magazine and still read it clearly
The speed of light in polythene is 1.99 x 108 m/s. What is the index of refraction of polythene
the track for a racing event was designed so that riders jump off the slope at 30 angle from a height of 5 ft. the
A Physicist must determine the mass = m of a block of a wood without a scale. He pulls the block of wood up a ramp angle = 30 degreesusing a rope. find the mass of the block
An object is 17.3 centimeter from a concave mirror of focal length 8.10 centimeter. Compute what is the image distance
Describe the relationship between stellar luminosity and surface temperature as portrayed in the Hertzsprung-Russell diagram for Main Sequence stars, Giant stars and White Dwarf stars.
a 100 kg wrecking ball savings on a 15.0 m long cable. if is swings from rest 4.0 m above the lowest piont, what is the tension in the cable at the lowest point
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