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Citrus2011 [14]
1 year ago
6

Wanda and marita are drinking bottles of water. each girl sounds a different musical note by blowing across the top of her bottl

e. what is a good hypothesis that could lead to new experimentation? it is more fun to play musical notes with carbonated water than with normal spring water. if the lid on a bottle is tightly closed, then blowing across the top of the bottle will not make a musical note. blowing across the top of a bottle can make a musical note. if there is less water in the bottle, then the note played is lower because there is more air to move around.
Biology
2 answers:
nignag [31]1 year ago
8 0

Answer:

answer is D

Explanation:

frozen [14]1 year ago
7 0

If there is less water in the bottle, then the note played is lower because there is more air to move around.

Using two different media (air and water) in glass bottles show how the speed of vibrations affects pitch.

Pitch is the way that your ear and brain order sounds based on their frequency (vibrations per second).

Rapid vibrations (high frequency) that reach your ear are categorized as a "higher" pitch, while slower vibrations (low frequency) are categorized as a "lower" pitch.

When you tap a glass of water with a pencil or spoon the water molecules vibrate and create sound waves through the water. More water means slower vibrations and a deeper tone.

The bottle with the most water will have the lowest pitch while the bottle with the least water will have the highest.

When Wanda and Marita blow across the top of the bottle, they set the air molecules vibrating and produce sound waves. In this case, more water results in a higher pitch, as opposed to tinkling the bottle. When the bottle has a small amount of water in it, the air molecules have lots of room and vibrate slower. Adding more water gives them less space to vibrate in, making them vibrate faster and producing a higher pitch.

To learn more about the pitch please click on the link brainly.com/question/18636575

#SPJ4

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Image is not avilable fo rthe question. The image is attached below:

The phylogenetic tree shown here displays the major clades of chordates.

Which statements about the phylogenetic tree are true?

A) Organism (c) is a common ancestor of lampreys and lungfishes.

B) Birds and ray-finned fishes have a notochord and jaws.

C) Lancelets and coelacanths are more closely related than are chimaeras and coelacanths.

D) Mammals and turtles are more closely related than are lungfishes and sharks.

E) Rays and frogs have vertebrae.

F) Descendants of organism (d) have limbs with digits.

G) Hagfishes, lungfishes, and frogs have lobed fins.

H) Organism (a) is a common ancestor of all chordates.

Answer:

B, D, F, E, H.

Explanation:

A phylogenetic tree is a diagram representing evolutionary relations between species. Phylogenetic trees are not conclusive evidence nor theories. In a phylogenetic tree the pattern of branching illustrates how organisms or other groups developed from a set of similar ancestors.

Some of the examples of phylogenetic tree are as following:

  • A notochord and jaws includes in birds and ray-finned fishes.  
  • Mammals and tortoises are closer to one another than lungfish and sharks are.  
  • Organic Descendants (d) have wings.  
  • Rays and frogs are columned vertebrally.  
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Hence, the true options are B, D, F, E, H.

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