Physics, 27.01.2020 21:31 rosezgomez97
Mradio station krth in los angeles broadcasts on an assigned frequency of 101 mhz with a power of 50,000 w. (a) what is the wavelength of the radio waves produced by this station? answer 1 m (b) estimate the average intensity of the wave at a distance of 8.70 km from the radio transmitting antenna. assume for the purpose of this estimate that the antenna radiates equally in all directions, so that the intensity is constant over a hemisphere centered on the antenna. answer 2 w/m2 (c) estimate the amplitude of the electric field at this distance.
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Physics, 22.06.2019 23:40
Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.
Answers: 3
Physics, 23.06.2019 01:00
What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?
Answers: 3
Physics, 23.06.2019 02:30
Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.
Answers: 2
Mradio station krth in los angeles broadcasts on an assigned frequency of 101 mhz with a power of 50...
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