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Use the model below to explain how the sound from the ambulance’s siren appears to change as it drives past the girl. Why does the girl hear the sound differently as the ambulance travels past her?
Develop your claim of why the girl hears the sound differently as the ambulance travels past her. *
Answers
Answer:
The girl hears the ambulance sound different. The first part of the picture shows the girl and the sound waves, and they are right in front of her, so she cannot hear them as well. But the second image shows the girl in the middle of the sound waves. This is the strongest and loudest part of the sound waves, so it sounds different to the girl in the image.
Also, in the first image, the sound waves would most likely sound higher than in the second image. The sound would continue to get lower in frequency the father it drove away. This is because of the Doppler Effect. The Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer.
Explanation:
Related Questions
Which molecule is the most common/plentiful molecule in our cells?
Answers
Answer:
water
Explanation:
Cells are composed of water, inorganic ions, and carbon-containing (organic) molecules.
The process of transferring energy during respiration occurs in a series of steps. This prevents too much heat from being released at one time. Maintaining an appropriate temperature is beneficial to an organism because A) enzymes need a proper range of temperatures to catalyze vital reactions B) cellular waste products can only be excreted in cooler temperatures C) hormones can only produce antibodies if temperatures are not excessive D) nutrients diffuse faster into cells when temperatures are lower
Answers
Answer:
A) enzymes need a proper range of temperatures to catalyze vital reactions
Explanation:
Cellular respiration is the process by which living cells synthesize ATP (energy). The synthesized energy is transferred for use in other activities. However, as stated in this question, the process of transferring energy during respiration occurs in a series of steps in order to prevent too much heat from being released at once.
The process whereby the living organism maintains an appropriate internal temperature is called HOMEOSTASIS, which is beneficial and key to an organism's survival because because enzymes need a proper range of temperatures to catalyze vital reactions. Enzymes are proteinous catalysts that gets denatured by certain factors such as high temperature, pH.
where can the fewest h+ ions be found on the pH scale, and the fewest OH- ions
Answers
The lowest [tex]H^+[/tex] concentration on the pH scale would be 14 while that of the [tex]OH^-[/tex] concentration would be 0.
pH ScaleThe pH scale ranges from 0 to 14 with 0 being the most acidic and 14 being the most basic or alkaline.
The more the [tex]H^+[/tex] concentration of a substance, the lower the pH, and the more the [tex]OH^-[/tex] concentration, the higher the pH.
Thus, at the lower extreme of the pH scale, the concentration of [tex]OH^-[/tex] is fewest, and at the higher extreme, the concentration of [tex]H^+[/tex] is fewest.
More on the pH scale can be found here: https://brainly.com/question/1433865
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Anyone like crossword puzzles?!
Answers
What type of infrared waves heat the Earth
Answers
a salmon moves from a salwater ocean to a freshwater river what takes place in the salmon cells as it moves
Answers
Answer:
The cells fill with water because of the movement of water by osmosis.
Explanation:
Answer:
the cells fill with water because of the movement of water by osmosis
Explanation:
The biomolecule described below is a _______________.
a. lipid
b. monosaccharide
c. carbohydrate
d. protein
Answers
Answer: it’s lipid
Explanation:
The biomolecule described below is a lipid because they are large and non-polluting molecules.
What is the main function of lipids?Lipids are responsible for providing energy, being in the form of fat that our body stores the excess energy we consume through food to use in times of need.
They are substances whose main characteristic is the insolubility in polar solvents and the solubility in organic solvents (nonpolar), presenting a hydrophobic nature, that is, aversion to the water molecule.
Lipids have unique characteristics that allow them to be quickly identified, for example because they are large and non-polluting molecules.
See more about Lipids at brainly.com/question/3498396
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Recently in Antarctica, a penguin with all black feathers was
discovered. This trait had never been seen before. What is
the likely source for this "new" trait?
Answers
The penguin in question has a rare genetic mutation called melanism, which makes skin, fur, and feathers black due to a high concentration of the pigment melanin. It's basically the opposite of albinism, which is caused by a lack of pigment.
Give three reasons why the villi in the small
intestine are perfect for absorbing food.
Answers
Answer:
Villi are specialized for absorption in the small intestine as they have a thin wall,
one cell thick, which enables a shorter diffusion path.
They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.
The sodium-potassium pump regulates the amount of sodium and potassium inside of cells, particularly nerve and muscle cells. In this process, an ATP is burned, causing three sodium ions to be pumped out and exchanged for two potassium ions, which are pumped in by a membrane protein. Both ions go against their concentration gradients.
The sodium-potassium pump is an example of
a. phagocytosis.
b. passive transport.
c. active transport.
d. facilitated diffusion.
Answers
Answer:
Active Transport because it needs ATP
One explanation for why polar regions are colder than equatorial regions is that
Answers
Answer:
Sunlight strikes at an different angle
Explanation:
Use the drop-down menus to identify the scientists who match the descriptions below.
found that animals are composed of cells
found that plants are composed of cells
looked at cork through a compound microscope
declared that all living cells can only come from other living cells
called living cells “animalcules
Answers
Answer:
the answers are;
1. Theodor Schwann
found that animals are composed of cells
2. Matthias Schleiden
found that plants are composed of cells
3. Robert Hooke
looked at cork through a compound microscope
4. Rudolph Virchow
declared that all living cells can only come from other living cells
5. Anton van Leeuwenhoek
called living cells “animalcules”
hope this helps! plz put me as the brainiest!
Atoms of the same element that have different numbers of neutrons are called ____.
A) isotopes
B) compounds
C) neutrino elements
D) molecules
Answers
what conditions are important for plants to be able to grow
Answers
Answer:
sunlight, soil, water
Explanation:
Which of the following is NOT a function of the catalyst?
Answers
Answer:
the correct Question is B-
Explanation:
A catalyst increases the rate of a chemical reaction by decreasing activation energy. So I used the power of marking out the ones i knew were incorrect. Hope this helps.
What came first: chicken or egg?
Answers
Answer:
egg
Explanation:
Compare and contrast sexual and asexual reproduction, including the advantages and disadvantages of each process.
Answers
Answer:
What are the advantages and disadvantages of both asexual and sexual reproduction?
Comparison chart
Asexual Reproduction Sexual Reproduction
Advantages Time Efficient; no need to search for mate, requires less energy Variation, Unique., organism is more protected
Disadvantages No variation - if the parent has a genetic disease, offspring does too. Requires two organisms, requires more energy
Answer:
Prokaryotes and eukaryotes vs. only eukaryotes
Mitosis and binary fission vs. meiosis
Both forms of reproduction
Two vs. four cells produced
Diploid vs. haploid cells produced
Advantages or disadvantages of each
Explanation:
Someone can please describe to me the process a cell is living if the cell membrane is damaged
Answers
Answer:
When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.
Explanation:
Which of these are alive?
A).potato.
B).potato chips.
C)gym socks.
Answers
Answer:
A) potato
Explanation:
Active transport occurs in cells, for example, when the Na-K pump is at work. Any process that involves active transport most often involves the
Select one:
a. movement of molecules without any predictable pattern.
b. movement of molecules from a lower concentration to a higher concentration.
c. movement of molecules from a higher concentration to a lower concentration.
d. movement of molecules from a lower to higher concentration and then back to the point of origin.
Answers
Because active transport occurs against concentration gradient, hence it's unpredictable!
This diagram shows DNA fingerprints for a child and four adults.
Which adult is most likely a parent of the child?
Answers
Answer:
probably parent 4 but I could be wrong bc look at the bottom of the scans the match kind of.
Explanation:
Answer: Adult 4
Explanation: There patterns match they are similar. :)
5
Energy for active transport comes from a cells'
(3 Points)
O Golgi Apparatus
Mitochondria
Nucleus
Lysosomes
Answers
Answer:
Nucleus :)Explanation:
I am trying to dissolve popcorn butter and milk into water. I notice the milk
dissolves, but the popcorn butter does not. Why is this? *
Answers
Answer:
Because butter is an oil-like substance. Water is a combination of hydrogen and oxygen, oil on the other hand is not. For the two to mix the oil would have to break the hydrogen chain but that is not possible because then the water won't be water.
So most fats repel water, just think about it being hydrophobic :)
Hope that helps and have a great day!
Which of the following is a carbohydrate serving as a structural component in the cell walls of Plants?
O Fructose
O Phospholipids
O Cholesterol
O Cellulose
Answers
Answer:
Cellulose, because,
Fructose is the monosaccharide so it cant give plant structural support
Phospholipids are not carbohydrates they are Lipids
Cholestrol is a type of steroid so it is not carbohydrate
Look at the images of different rocks.
Which two rocks have a fine-grained texture?
1 and 5
2 and 3
3 and 5
4 and 1
Answers
Answer:
1 and 5
Explanation:
Image 1 and 5 actually show fine-grained textures of rocks.
Fine-grained textures actually indicates that magmas that are formed at or near the earth's surface cool rapidly. It's known that when magmas cool fast, they prevent very large crystals from growing. When hand samples of fine-grained rocks are taken, they appear homogeneous throughout the rock.
Answer:
1 and 5
Explanation:
*EXTRA POINTS*
If the volume of a gas decreases, what happens to the pressure?
If the volume of a gas increases, what happens to the pressure?
Answers
Answer:
Boyle's law. If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas (Figure 1).
Explanation:
amino acids are linked together to make proteins by removing a molecule of in a process called
Answers
In a full Sentence: Amino acids are linked together to make proteins by removing a molecule of water in a process called dehydration synthesis .
What organ in the circulatory system is made up of cardiac tissue?
O The stomach
O The lungs
O The skin
O The heart
Answers
Answer:
the heart
Explanation:
Cardiac muscle tissue is only found in your heart, where it performs coordinated contractions that allow your heart to pump blood through your circulatory system.
The energy for cellular respiration comes from the glucose that was made during photosynthesis
Answers
Answer:
True
Explanation:
Glucose and oxygen that are made with the process called photosynthesis are then used as starting products for cellular respiration. This cellular respiration later makes carbon dioxide and water are then in combination with sunlight the starting products for new photosynthesis.
In a food web, the arrows point from one organism to the organism it eats. True or false
Answers
Answer:
False
Explanation:
In a food wed the arrows point to the animal that will eat the organism it's pointing away from