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jeka94
3 years ago
11

Which of the following phenomena is taking place when sound waves are reflected from a surface along parallel lines?

Biology
1 answer:
Ksivusya [100]3 years ago
7 0
D. Focusing Sound waves reflected in flat surfaces like walls, floors and ceilings results to uneven dispersion of sounds by creating locations with high intensity and another with low intensity. This process is called Focusing and can be undesirable in auditoriums.
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Question 4 (1 point) If 18 grams of oxygen reacts completely with 4 grams of hydrogen, we would expect how many grams of water?
Lisa [10]

Answer:

C.22 grams because mass cannot be created or destroyed

Explanation:

Reaction equation:

        2H₂  +   O₂    →   2 H₂O

Mass of oxygen  = 18g

Mass of hydrogen  = 4g

The mass of water produced is 22g according to law of conservation of mass.

The law states that " in a chemical reaction, mass is always conserved"

 The sum of the mass of product  and reactants must always be the same.  

6 0
3 years ago
I dont know what to do can someone please help me ASAP
ANTONII [103]

Answer:

In the explanation. :)

Explanation:

Human powered generators are the best source for the rescue team. We cannot always depend on the sun. What if the sun is not out that day? What if it's a rainy day? What if the sun is what's causing the rescue team to come out? Human powered generators are sometimes untrustworthy, but at the same time we know that at least it's a step away. We don't have to wait all-day for the sun to help out. Of course, the energy from the sun is always going to be there and won't cause anybody hurt, harm, or danger, but at the same time we can always convert to human powered generators and they'll work just as perfect.

Hope this helps, have a great day!

4 0
3 years ago
How are
maksim [4K]

Answer:

Both are anaerobic processes that break down glucose to make ATP and recycle NAD+ to glycolysis. Lactic acid fermentation produces lactic acid, alcoholic fermentation produces alcohol and carbon dioxide.

Explanation:

5 0
3 years ago
Which of these is mismatched? e: A. roundworm - complete digestive tract B. cnidarian - nematocyst C. sponge - collar cell D. pl
STALIN [3.7K]

Answer:

Option E

Explanation:

The flukes also called flatworms or platyhelminthes have a false body cavity or pseudocoelum which exist as patches between the body wall and the intestine, they do not originated mainly from the mesoderm like the true body cavity.

6 0
3 years ago
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Due to climate change, places that used to be colder are now warming up, allowing new invasive species to establish themselves.
dangina [55]

Answer:

Warming leads to longer life spans for the animals because none die due to exposure to the cold.

Explanation:

3 0
2 years ago
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