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40問 • 2年前
  • tokkijijii
    • 通報

    問題一覧

  • 1

    ______ have the longest wavelength in the electromagnetic spectrum

    Radio waves

  • 2

    Radio waves are produced by ________________

    Making electrons vibrate in antenna

  • 3

    _____ are used for broadcasting by local radio stations

    Medium and high frequency waves

  • 4

    _________ is converted by a microphone into patterns of electric current variations called audio-frequency (AF) signals

    Sound

  • 5

    In medium and high frequency waves, sound is converted by a microphone into patterns of electric current variations called ______________

    Audio frequency (af) signals

  • 6

    High frequency radio waves called ______

    Radio frequency (rf)

  • 7

    AM

    Amplitude modulation

  • 8

    In _________, the amplitude of the radio waves (rf carrier) changes to match that of the audio-frequency (af) signal

    Amplitude modulation (am)

  • 9

    Can be sent over long distances

    Amplitude modulation (am)

  • 10

    __________ provide a higher quality broadcasting including stereo sound

    Very high frequency waves

  • 11

    In _________, the frequency waves provide a change to match that of the signal

    Frequency modulation (fm)

  • 12

    Sound portions are carried by

    Am waves

  • 13

    Picture portions are carried by

    Fm waves

  • 14

    _____ have a very wide range of wavelength

    Radio waves

  • 15

    The whole region of the radio waves is divided into smaller regions of ________

    Wavebands

  • 16

    _______________ are suitable for communication over great distance

    Low frequency waves

  • 17

    Range of earth's limits

    80km

  • 18

    To extend the range of radio waves, ______ is used

    Repeater

  • 19

    ____________ can be reflected by the ionesphere and these waves can be transimtted over great distances

    High frequency waves

  • 20

    Applicatiins of microwaves

    Satellite communication, Radar, Terrestrial communication, Microwave oven

  • 21

    Radio waves travel in _______ line

    Straight

  • 22

    Layer of the atmosphere composed of ionizer gases

    Ionosphere

  • 23

    _____ travel around the earth at an altitude of 35,000 km above the equator, speed of 11,300 km/h and revolve around the earth every 24 hrs

    Communication satellites

  • 24

    Altitude of communication satellites

    35,000 km

  • 25

    Speed of communication satellites

    11,300 km/h

  • 26

    They revolve around the earth every ?

    24 hrs

  • 27

    _______ have short wavelengts and are reflected by small objects

    Microwaves

  • 28

    RADAR

    Radio detection and ranging

  • 29

    Radar aystem consists of _____, ______, and a _____

    Antenna, Transmitter, Receiver

  • 30

    The _____ whirls around continuously to scan the surrounding area

    Antenna

  • 31

    ______ sends out a narrow beam of microwaves in short pulses

    Transmitter

  • 32

    A distant object reflects some of the signal back to the ______

    Receiver

  • 33

    ________ is now used because of its wide range of channels and clearer sound and picture

    Catv or cable tv

  • 34

    ______ are used to transmit television news coverage from mobile broadcast vehicles back to the station

    Microwaves

  • 35

    Vehicles used by broadcasting companies

    Broadcast vehicles

  • 36

    _____ is a radio transmitter and receiver that has microwaves

    Cellphone

  • 37

    _________ is a very sophisticated radio but still a radio

    Cellular phone

  • 38

    Cellphone is the answer to emerging demand for _______

    Mobile communication

  • 39

    It penetrate the food from being heated

    Microwave oven

  • 40

    Thus creating _________ which then produces heat will cook the food in a microwave oven

    Molecular friction

    • Constellations

    Constellations

    tokkijijii · 88問 · 2年前

    Constellations

    Constellations

    88問 • 2年前
    tokkijijii

    World History - Kabihasnang Tsino

    World History - Kabihasnang Tsino

    tokkijijii · 24問 · 3年前

    World History - Kabihasnang Tsino

    World History - Kabihasnang Tsino

    24問 • 3年前
    tokkijijii

    World History (bp)

    World History (bp)

    tokkijijii · 46問 · 3年前

    World History (bp)

    World History (bp)

    46問 • 3年前
    tokkijijii

    World History (bp2)

    World History (bp2)

    tokkijijii · 37問 · 3年前

    World History (bp2)

    World History (bp2)

    37問 • 3年前
    tokkijijii

    World History - Current Events (bp)

    World History - Current Events (bp)

    tokkijijii · 43問 · 3年前

    World History - Current Events (bp)

    World History - Current Events (bp)

    43問 • 3年前
    tokkijijii

    World History (nb)

    World History (nb)

    tokkijijii · 122問 · 3年前

    World History (nb)

    World History (nb)

    122問 • 3年前
    tokkijijii

    Volcanoes

    Volcanoes

    tokkijijii · 33問 · 2年前

    Volcanoes

    Volcanoes

    33問 • 2年前
    tokkijijii

    Bulkan

    Bulkan

    tokkijijii · 10問 · 2年前

    Bulkan

    Bulkan

    10問 • 2年前
    tokkijijii

    Energy from the volcanoes

    Energy from the volcanoes

    tokkijijii · 15問 · 2年前

    Energy from the volcanoes

    Energy from the volcanoes

    15問 • 2年前
    tokkijijii

    Mga katangian ng makatutulong upang maisasabuhay ang kagalingan sa paggawa

    Mga katangian ng makatutulong upang maisasabuhay ang kagalingan sa paggawa

    tokkijijii · 27問 · 2年前

    Mga katangian ng makatutulong upang maisasabuhay ang kagalingan sa paggawa

    Mga katangian ng makatutulong upang maisasabuhay ang kagalingan sa paggawa

    27問 • 2年前
    tokkijijii

    Kasipagan

    Kasipagan

    tokkijijii · 13問 · 2年前

    Kasipagan

    Kasipagan

    13問 • 2年前
    tokkijijii

    Pamamahala sa paggamit ng oras

    Pamamahala sa paggamit ng oras

    tokkijijii · 8問 · 2年前

    Pamamahala sa paggamit ng oras

    Pamamahala sa paggamit ng oras

    8問 • 2年前
    tokkijijii

    Paikot na daloy ng ekonomiya

    Paikot na daloy ng ekonomiya

    tokkijijii · 25問 · 2年前

    Paikot na daloy ng ekonomiya

    Paikot na daloy ng ekonomiya

    25問 • 2年前
    tokkijijii

    Ugnayan ng pangkalahatang kita, pag-iimpok at pagkonsumo

    Ugnayan ng pangkalahatang kita, pag-iimpok at pagkonsumo

    tokkijijii · 16問 · 2年前

    Ugnayan ng pangkalahatang kita, pag-iimpok at pagkonsumo

    Ugnayan ng pangkalahatang kita, pag-iimpok at pagkonsumo

    16問 • 2年前
    tokkijijii

    Implasyon

    Implasyon

    tokkijijii · 18問 · 2年前

    Implasyon

    Implasyon

    18問 • 2年前
    tokkijijii

    Dahilan ng implasyon

    Dahilan ng implasyon

    tokkijijii · 10問 · 2年前

    Dahilan ng implasyon

    Dahilan ng implasyon

    10問 • 2年前
    tokkijijii

    Patakarang Piskal

    Patakarang Piskal

    tokkijijii · 21問 · 2年前

    Patakarang Piskal

    Patakarang Piskal

    21問 • 2年前
    tokkijijii

    Patakarang pananalapi

    Patakarang pananalapi

    tokkijijii · 48問 · 2年前

    Patakarang pananalapi

    Patakarang pananalapi

    48問 • 2年前
    tokkijijii

    問題一覧

  • 1

    ______ have the longest wavelength in the electromagnetic spectrum

    Radio waves

  • 2

    Radio waves are produced by ________________

    Making electrons vibrate in antenna

  • 3

    _____ are used for broadcasting by local radio stations

    Medium and high frequency waves

  • 4

    _________ is converted by a microphone into patterns of electric current variations called audio-frequency (AF) signals

    Sound

  • 5

    In medium and high frequency waves, sound is converted by a microphone into patterns of electric current variations called ______________

    Audio frequency (af) signals

  • 6

    High frequency radio waves called ______

    Radio frequency (rf)

  • 7

    AM

    Amplitude modulation

  • 8

    In _________, the amplitude of the radio waves (rf carrier) changes to match that of the audio-frequency (af) signal

    Amplitude modulation (am)

  • 9

    Can be sent over long distances

    Amplitude modulation (am)

  • 10

    __________ provide a higher quality broadcasting including stereo sound

    Very high frequency waves

  • 11

    In _________, the frequency waves provide a change to match that of the signal

    Frequency modulation (fm)

  • 12

    Sound portions are carried by

    Am waves

  • 13

    Picture portions are carried by

    Fm waves

  • 14

    _____ have a very wide range of wavelength

    Radio waves

  • 15

    The whole region of the radio waves is divided into smaller regions of ________

    Wavebands

  • 16

    _______________ are suitable for communication over great distance

    Low frequency waves

  • 17

    Range of earth's limits

    80km

  • 18

    To extend the range of radio waves, ______ is used

    Repeater

  • 19

    ____________ can be reflected by the ionesphere and these waves can be transimtted over great distances

    High frequency waves

  • 20

    Applicatiins of microwaves

    Satellite communication, Radar, Terrestrial communication, Microwave oven

  • 21

    Radio waves travel in _______ line

    Straight

  • 22

    Layer of the atmosphere composed of ionizer gases

    Ionosphere

  • 23

    _____ travel around the earth at an altitude of 35,000 km above the equator, speed of 11,300 km/h and revolve around the earth every 24 hrs

    Communication satellites

  • 24

    Altitude of communication satellites

    35,000 km

  • 25

    Speed of communication satellites

    11,300 km/h

  • 26

    They revolve around the earth every ?

    24 hrs

  • 27

    _______ have short wavelengts and are reflected by small objects

    Microwaves

  • 28

    RADAR

    Radio detection and ranging

  • 29

    Radar aystem consists of _____, ______, and a _____

    Antenna, Transmitter, Receiver

  • 30

    The _____ whirls around continuously to scan the surrounding area

    Antenna

  • 31

    ______ sends out a narrow beam of microwaves in short pulses

    Transmitter

  • 32

    A distant object reflects some of the signal back to the ______

    Receiver

  • 33

    ________ is now used because of its wide range of channels and clearer sound and picture

    Catv or cable tv

  • 34

    ______ are used to transmit television news coverage from mobile broadcast vehicles back to the station

    Microwaves

  • 35

    Vehicles used by broadcasting companies

    Broadcast vehicles

  • 36

    _____ is a radio transmitter and receiver that has microwaves

    Cellphone

  • 37

    _________ is a very sophisticated radio but still a radio

    Cellular phone

  • 38

    Cellphone is the answer to emerging demand for _______

    Mobile communication

  • 39

    It penetrate the food from being heated

    Microwave oven

  • 40

    Thus creating _________ which then produces heat will cook the food in a microwave oven

    Molecular friction