You call to a friend from a boat floating in the ocean. Which best describes the changes in the speed of the sound waves as they move from you to below the surface of the ocean? The speed of sound is faster in the water than in the air.
The speed of sound is faster in the air than in the water.
The speed of sound does not change as it moves through the air or water.
The speed depends on how loud you yell.

Answers

Answer 1

Answer:

The correct answer is: The speed of sound is faster in the water than in the air.

The speed of sound is different between those two mediums because they have different densities. Since, water is denser than air, more energy is required to generate a wave but once it stars, it travels faster than it would do in air. Sound waves’ travel can be presented by particles that transmit the energy one to another as they bump. The sound speed is lower in the air (than in water) because particles are far apart, so they travel further before they collide.

Answer 2

Answer:

Answer:

Explanation:

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These two cells have several features in common. They also differ in several ways. The two cells share all but one feature listed below. What is that feature?A) contain DNA B) enclosed in protein capsule C) undergo cellular respiration D) produce proteins in ribosome
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If a change in the body causes more change in the same direction the system is called A. feedback inhibition. B. positive feedback. C. negative feedback. D. neutral feedback.

Answers

Its b an positive feedback.

Natural childbirth is an example of positive feedback. More often than not, negative feedback systems help the body maintain homeostasis.

Which of these is true about DNA, proteins, and the expression of genetic traits?

Answers

Chromosomes are inherited from the parents. One chromosome from each of 23 pairs came from each of the parents. The two chromosomes of a pair (except for the sex chromosomes) contain the same genes, but the genes have small differences. The X and Y Chromosomes determine the organism’s sex. One chromosome pair - the sex chromosomes - is unique. Typically females have two X chromosomes and males have an X and a Y. Mothers always pass an X chromosome on to their children. Whether the father passes on his X chromosome (leading to a pair of X chromosomes) or his Y chromosome (making a mixed set) determines your sex. Chromosomes get shuffled when eggs and sperm are made. Though most adult cells contain two sets of chromosomes, sperm and egg cells are different. These special cells have just one chromosome from each pair. Which chromosome they get from each pair is random, making each sperm or egg cell unique. There is also a bit of mixing before the chromosomes are sorted into individual sperm or egg cells. Chromosomes from each pair in a mother or father, respectively, make contact and exchange pieces of DNA, creating hybrid chromosomes.

Answer:

Explanation:

genes and DNA code for the production of proteins, which can cause traits to be expressed .

(1 point) If the bacteria in a culture double in 3 hours, how many hours will it take before 4 times the original number is present? It will take hours. (Answer should be accurate to within at least t

Answers

Final answer:

It will take 6 hours for 3 times the original number of bacteria to be present.

Explanation:

To find out how many hours it will take for the bacteria to reach 4 times the original number, we need to determine how many times the original number the bacteria will have to double. Since the bacteria double every 3 hours, we can write an equation:

2n = 4

where n represents the number of times the bacteria doubles.

Solving this equation, we find that n = 2.

Since the bacteria doubles every 3 hours, and it will take 2 doublings to reach 4 times the original number, it will take:

2 * 3 = 6 hours

So, the answer is 6 hours

Your question is incomplete, but most probably your full question was:

If the bacteria in a culture double in 3 hours, how many hours will it take before 3 times the original number is present? It will take__________-- hours. (Answer should be accurate to within' at least three digits.)

Learn more about bacteria growth here:

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It will take about 5.05 hours before 4 times the original number of bacteria is present. sorry if I m wrong..

Explanation:

When a raw, shell-less egg was placed in sugar solution, the egg shrank. The egg was brought back to its original size by placing it in water. Which process does the experiment demonstrate? A) osmosis B) diffusion C) dehydration D) reverse osmosis

Answers

A: osmosis. The egg first expanded because it was placed in a hypertonic solution (sugar water), causing the water to exit the egg to balance the higher concentration of solute outside of the egg. Placing it in fresh water creates a hypotonic environment, thereby causing water to rush back in.

Answer:

Explanation:

osmosis

The symbiotic relationship between a flower and the insect that feeds on its nectar is an example ofa. mutualism because the flower provides the insect with food and the insect pollinates the flower.
b. parasitism because the insect lives off the nectar from the flower.
c. commensalism because the insect does not harm the flower and the flower does not benefit from the relationship.
d. predation because the insect feeds on the flower.

Answers

The answer is A. Mutualism. Both the flower and the insect benefit from the relationship; the flower is pollinated and the bee gets nectar.

What happens during interphase?

Answers

Cell is growing and just doing its normal activites

Interphase- the resting phase between successive mitotic divisions of a cell, or be tween the first and second divisions of Meiosis

During this, the cell obtains nutrients and it's considered the living phase of the cell. This is where eukaryotic cells spend most of their time. Interphase is said to be a resting phase.

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Which of the following areas in a secondary lymphoid organ allows intimate contact between blood and the lymphocytes?red pulp of the spleengerminal centers of the lymph nodesHassall's corpuscles of the thymuswhite pulp of the spleen

Unstable atmospheric conditions lead to the formation of lightning and thunder ina. nimbostratus clouds.c. altostratus clouds.b. altocumulus clouds.d. cumulonimbus clouds.