Maria _______ al mercado. A. compra B. prueba C. otra D. dulce
Updated 7/25/2019 1:26:17 PM
Confirmed by Sting [7/25/2019 1:26:11 PM]
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The main purpose of the turbine in a turbojet engine is to A. drive the compressor. B. compress the air. C. reduce the temperature of the exhaust gas. D. increase the velocity of the exhaust gases
Weegy: The main purpose of the turbine in the turbojet engine is to drive the compressor. User: Which one of the following indicates a drop in temperature? A. The alcohol in a thermometer expands. B. The column of liquid in a thermometer moves up three degrees. C. The brass on a bent bimetallic strip is on the outside curve. D. A bimetallic strip bends so that the steel is on the outside curve. Weegy: A bimetallic strip bends so that the steel is on the outside curve -indicates a drop in temperature. User: If a substance forms crystals when it solidifies, its _______ points are the same. A. melting and freezing B. evaporation and condensation C. melting and condensation D. evaporation and freezing Weegy: If a substance forms crystals when it solidifies, its melting and freezing points are the same. User: A temperature of 20°C is equivalent to approximately A. –6°F B. 136°F. C. 68°F D. 32°F Weegy: A temperature of 20?C is equivalent to approximately: 68?F. (More)
Updated 91 days ago|1/24/2024 6:29:07 AM
A temperature of 20°C is equivalent to approximately 68 degrees Fahrenheit.
Solution:
To convert Celsius to Fahrenheit, you can use the formula:
F = {9}/{5}C + 32, ( C = 20 ):
F = {9}/{5} × 20 + 32
F = 36 + 32
F = 68

So, 20°C is equivalent to 68°F.
Added 91 days ago|1/24/2024 6:29:07 AM
The work of which scientist(s) helped to explain light's ability to propagate through a vacuum? A. Davisson and Germer B. Maxwell C. Newton D. Fresnel, Fraunhofer, and Arago
Weegy: The work of Davisson and Germer helped to explain light's ability to propagate through a vacuum. User: What part of the human ear contains the eardrum? A. The lower ear B. The inner ear C. The outer ear D. The middle ear Weegy: The function of the eardrum in the middle ear is to vibrate with the frequency of received sounds. User: A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes A. nine times lower. B. three times higher. C. three times lower. D. nine times higher. Weegy: A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes: nine times as low. [ ] User: Which of the following statements is true of vibrations? A. The frequency of infrasonic vibrations is much too high to be heard by humans. B. Ultrasonic vibrations have a frequency lower than the range for normal hearing. C. Neither ultrasonic nor infrasonic vibrations can be heard by humans. D. Infrasonic vibrations are used in sonar equipment and to detect flaws in steel castings (More)
Updated 91 days ago|1/24/2024 6:27:29 AM
Neither ultrasonic nor infrasonic vibrations can be heard by humans.- is true of vibrations.
The middle ear of the human ear contains the eardrum.

Added 91 days ago|1/24/2024 6:27:29 AM
Which of the following solid fuels has the highest heating value? A. Bituminous coal B. Coke C. Lignite D. Wood
Weegy: Bituminous coal has the highest heating value. User: If a tank filled with water contains a block, and the height of the water above point A within the block is 0.6 meters, what's the pressure at point A? A. 3.85 kPa B. 5.88 kPa C. 7.84 kPa D. 9.80 kPa (More)
Updated 11/9/2020 7:50:30 PM
If a tank filled with water contains a block, and the height of the water above point A within the block is 0.6 meters, P=pgh P= 1000 kg/m3*9.8 m/s2*0.6m= 5.88kPa is the pressure point.
If a sound is refracted away from the surface of the earth, this indicates that the A. air is cooler than the ground. B. wind is blowing in the direction of the sound. C. ground is cooling faster than the air. D. air has high humidity
Weegy: When a sound from a source is refracted away from the surface of the earth, it gives an indication that the: air is cooler than the ground. User: The longest wavelength within the visible spectrum is _______ light. A. blue B. violet C. red D. orange Weegy: The longest wavelength within the visible spectrum is RED light. User: Your brother is insisting that you'll never hear a sound produced behind a barrier wall at the end of your yard. You notice that the door within the wall is open and quickly explain to him that the sound will be able to reach you due to A. focusing. B. reverberation. C. diffraction. D. diffusion. Weegy: Your brother is insisting that you'll never hear a sound produced behind a barrier wall at the end of your yard. You notice that the door within the wall is open and quickly explain to him that the sound will be able to reach you due to: diffraction. User: Which of the following would not increase the velocity of a sound wave in air? A. Increasing the temperature of the air B. Increasing the wind speed in the direction the wave is traveling C. Lowering the density of the air D. Lowering the humidity of the air (More)
Updated 7/18/2019 5:09:31 PM
Lowering the humidity of the air would not increase the velocity of a sound wave in air.

If a light wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is A. 40 degrees. B. 90 degrees. C. 80 degrees. D. 0 degrees.
Weegy: If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is 40 degrees. User: The temperature in a room is 56°C. What would the velocity of a sound wave be at this temperature? A. 364.6 Hz B. 265.2 Hz C. 1856.2 Hz D. 459.2 Hz (More)
Updated 4/3/2022 12:31:18 PM
The temperature in a room is 56 C. The velocity of a sound wave be at this temperature would be 364.6 Hz. Solution: v 331.4 + 0.6 (56); v 365 m/s.
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