Most waves used for communication purposes rely on geostationary satellites because _____ a) they cannot transmit data at long distances due to curvature of the earth b) they are reflected by the atmosphere c) they are very cheap d) it does not occupy space on the earth’s surface
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Most waves used for communication purposes rely on geostationary satellites because _____
a) they cannot transmit data at long distances due to curvature of the earth
b) they are reflected by the atmosphere
c) they are very cheap
d) it does not occupy space on the earth’s surface
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- 27. What is a characteristic that applies to water AND radio waves? a. They are longitudinal b. They are mechanical c. They can travel in a vacuum d. They transfer energyIf the intensity of light is 6 x 10-2 watts/m? at a distance of 3 meters from the source, what is the intensity of the light at a distance of 9 meters from the source? 3.Submarine detection helicopters are fitted with transmitters which send out sound waves. The reflected signals identify the location of the submarines. Explain why it is common for this transmitter to be suspended from the helicopter by a wire so that it is under water.
- Waves polarization may be linear, or longitudinal happen for sound waves be linear, mechanical, or circular be linear, circular, or eliptical GoogleWhich of the following are waves that can travel without a medium? Select all that apply. visible light seismic waves radio waves O sound waves waves on a lake x-raysHow are mechanical waves different than light waves? Mechanical waves can travel through empty space. Mechanical waves need a medium to travel through Light waves need a medium to travel through Light waves cannot travel through empty space.
- Dolphins can use sonar to detect objects in the sea. How far away is the object from the dolphin if the sonar takes .02 sec to be returned? Sound travels at 1484 m/s in sea water. 60 m 30 m 15 m 7.5 mLight can pass easily through water and through air, but light will reflect from the surface of a lake. What does this tell you about the speed of light in air and in water?There are two main types of waves which are O a transverse waves/ longitudinal waves mechanical waves/ electromagnetic waves
- 67. An airplane (v = 710 m-s“, T = - 54 C°) when the time between seeing above observer and hearing is 9.7 sec, find the altitude. مرتضى غني علي %3D#2. The radio wave from station 103.3 FM can be written as y = 0.721 cos(6.49 x 10°t). Recall that radio waves travel at the speed of light (3.00× 10 m/s). Determine the following: A) Wavelength B) Frequency and period C) AmplitudeDigital signals are more reliable than analog signals. Why? Question 2 options: Analog signals send pulses or segments of information Digital signals are less likely to have wave interference.