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Which of the following statements is true of vibrations? A. Neither ultrasonic nor infrasonic vibrations can be heard by humans. B. The frequency of infrasonic vibrations is much too high to be heard by humans. C. Ultrasonic vibrations have a frequency lower than the range for normal hearing. D. Infrasonic vibrations are used in sonar equipment and to detect flaws in steel castings.
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Neither ultrasonic nor infrasonic vibrations can be heard by humans. - is true of vibrations.
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Asked 6/17/2019 8:23:17 AM
Updated 7/12/2020 9:03:29 AM
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Neither ultrasonic nor infrasonic vibrations can be heard by humans. - is true of vibrations.


Added 7/12/2020 9:03:29 AM
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The transmission of heat requiring the movement of a liquid or a gas is A. radiation. B. transduction. C. conduction. D. convection.
Weegy: The transmission of heat requiring the movement of a liquid or a gas is convection. (More)
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Updated 116 days ago|4/8/2021 2:30:17 AM
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The main difference between turbojets and rocket engines is the fact that A. rocket engines need oxygen from the air. B. rocket engines aren't dependent on oxygen from the air. C. turbojets aren't dependent on oxygen from the air. D. turbojets carry their own supply of oxygen as oxidizers.
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Updated 246 days ago|11/28/2020 4:57:39 PM
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The main difference between turbojets and rocket engines is the fact that rocket engines are not dependent on oxygen from the air.

Added 246 days ago|11/28/2020 4:57:39 PM
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Which one of the following substances is a liquid fuel used in rocket engines? A. Potassium perchlorate B. Liquid oxygen C. Ammonia D. Sodium nitrate
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Updated 246 days ago|11/28/2020 4:57:54 PM
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Liquid oxygen is a liquid fuel used in rocket engines.
Added 246 days ago|11/28/2020 4:57:54 PM
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During the stage of internal-combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, A. the intake valve is open, and the exhaust valve is closed. B. both the intake and exhaust valves are open. C. both the intake and exhaust valves are closed. D. the exhaust valve is open, and the intake valve is closed.
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Updated 361 days ago|8/5/2020 1:05:01 PM
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During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, both valves will be closed.

Added 361 days ago|8/5/2020 1:05:01 PM
This answer has been confirmed as correct and helpful.
Convert the temperature 288 K to degrees Celsius. A. 561°C B. 748°C C. –172°C D. 15°C
Weegy: The temperature 288 K converted to degrees Celsius is 15°C. (More)
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Updated 6/17/2019 7:16:22 PM
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