Answer:
false.
so·nar
/ˈsōˌnär/
Learn to pronounce
noun
a system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected.
"a weak sonar signal"
Answer:
0.3106 seconds
Explanation:
Frequency= 20,000-Hz
The speed of echoes sounds can be calculated using the expression below;
Y= ( 2x/t) ...........................eqn(1)
t= overall time taken
x = maximum depth = 230m
Y= speed of echoes sounds
Speed of sound in water= 1,481 m/s which is a constant with little variation.
If we substitute the given values into eqn(1) we have
1481 = (2× 230)/ t
1481 × t= 460
t=460/1481
t=0.3106 seconds
Hence, the minimum time between pulses (in fresh water) is 0.3106 seconds
Whats atoms are found in human fat?
Fatty acids are constructed from the chemical elements carbon, oxygen and hydrogen. Fatty acids can be divided into a carboxylic acid head group–hence fatty acid–linked to a long chain of carbon atoms.
does that help?
If a firm hires 10 workers at $9 per hour each and the 11th worker will be hired only if the wage rate falls to $8 per hour, the marginal wage rate must be _____.
Multiple Choice
−$2
$2
−$2.20
$2.20
Answer:
-2 USD
Explanation:
A homo-zygous round seeded plant is crossed with a homo-zygous wrinkled seeded plant. Round R is dominant to wrinkled r.What alleles would be in the gametes of the round seeded plant?
A. R,r
B. RR
C. Rr
D. R,R
How can carbon can be stored for a short time in the natural cycle?
Answer:
The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.
the empirical (scientific) method of study is based on ______
Answer:
Empirical research is based on observed and measured phenomena and derives knowledge from actual experience rather than from theory or belief.
Key characteristics of empirical research:
- Specific research questions to be answered
- Definition of the population, behavior, or phenomena being studied
- Description of the process used to study this population or phenomena, including selection criteria, controls, and testing instruments (such as surveys).
The gene for fur color in mice has two alleles, the allele for gray fur
(G) is dominant to the allele for black fur (g). What would be the
phenotype of a mouse with genotype gg?
A Gray fur
B black fur
C Gray fur with the black spot
D Black fur with the gray spot
Why is the ability to adjust conclusions when necessary important Io critical thinking?
Answer:
When new information leads to new and different conclusions, it is important to be able to adapt to the most up-to-date conclusions.
hope this helps bye-bye
The __________________ is the tunnel that cuts through the external auditory meatus delivering sound to the ear drum or the _____________________.
Answer:
The auricle (pinna) is the visible portion of the outer ear. It collects sound waves and channels them into the ear canal (external auditory meatus), where the sound is amplified. The sound waves then travel toward a flexible, oval membrane at the end of the ear canal called the eardrum, or tympanic membrane.
Explanation:
Which phrase best describes what a soil horizon is?
A the bottom layer of a soil profile
B each layer of a soil profile
C the place where two soil profiles meet
D the place where a soil profile meets bedrock
Answer:
I suppose the answer is C
Each layer of a soil profile best describes a soil horizon.
What is a soil horizon?A soil horizon is a layer of soil within a soil profile. A soil profile is a vertical section through the soil, showing the different layers, or horizons, of soil that make up the soil. Soil horizons are typically classified based on their physical, chemical, and biological properties, and they can vary in thickness and composition depending on factors such as climate, vegetation, and the underlying geology.
Some common soil horizons include the surface horizon, the subsoil, and the parent material.
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What is the difference between refraction and reflection?
Answer:
Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another.
Explanation:
which fungus does contain mycelium?
Answer:
Mycelium is part of the fungi kingdom and is the network of threads, called hyphae, from which mushrooms grow. Not all mycelia fruit mushrooms, depending on the environmental conditions, but all mushrooms come from mycelia.
Explanation:
PLEASE HELP WITH THIS ONE QUESTION
Answer:
D
Explanation:
as only one phosphate is removed hence the name ADP which stands for adenineDIphosphate. Hope this make sense :)
Drag and drop the ocean zones to order them from shallowest to deepest
Abyssal zone
Sunlight zone
Midnight zone
Twilight zone
How does the water cycle transfer energy through an ecosystem?
Answer:
Water also moves through the living organisms in an ecosystem. Plants soak up large amounts of water through their roots. The water then moves up the plant and evaporates from the leaves in a process called transpiration. The process of transpiration, like evaporation, returns water back into the atmosphere
Explanation:
my dad is a science teacher
Answer:
water gains energy in condensation and releases it in evaporation
Imagine that you have separated the cells of different sponges and mixed them up in a lab. Describe the experiment and your predicted results.
Answer:
2
Explanation:
Because if you add 1 to 8 you get 9 then subtract 9 by 7 then and your answer is 2
Answer:
Songes are mixed up in a cell bowl
Explanation:
Part C
Now, set the mass of both balls to be equal. Increase the distance between them by pulling one of
the balls away from the other. To pull a ball away, click on the ball and drag it. What happens to
the force arrows between the two balls? What does this mean in terms of gravity?
B
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Answer: law of motion
Explanation:
Newton’s first two laws of motion explain how the motion of a single object changes. If the forces acting on the object are bal- anced, the object will remain at rest or stay in motion with con- stant velocity. If the forces are unbalanced, the object will accelerate in the direction of the net force. Newton’s second law tells how to calculate the acceleration, or change in motion, of an object if the net force acting on it is known.
Newton’s third law describes something else that happens when one object exerts a force on another object. Suppose you push on a wall. It may surprise you to learn that if you push on a wall, the wall also pushes on you. According to Newton’s third law of motion,
How do i do this:
Information about the four organisms can be found on the Internet. Use credible websites to find answers to the questions you developed in part A. Based on this data, draw your own dichotomous key.
Answer:
multicellular animal,plant,fungi,microorganisms
Plzzzzz help
After conducting the experiment and reviewing the data, a marine biologist states that sea
turtles nest from May to October and determines that August is the most critical month. This is
an example of which step in the Scientific Method?
A. analyze the results
B. conduct the experiment
C. form a conclusion
D. form a hypothesis
The scientific method includes the problem statement, previous knowledge, hypothesis and goals, methodology, results, and discusion/conclusion. The correct option is C. form a conclusion.
----------------
The scientific method is a research method that consists of systematic observations, measures, experimentation, analysis, and verification of a hypothesis. It is based on reproducibility and refutability.
When conducting an experiment, you need to consider,
Definition and problem statement. The question for which there is not an answer yet. A question the investigator wants to answer.
Theoretical framework. Antecedents from other investigations. Previous knowledge about the study object is always required for a better understanding.
The main goal of the study is basically what the investigator wants to find out.
Hypothesis formulation. The researcher makes a hypothesis to predict or make a conjecture -not verified and which requires corroboration- about what is going on or expected to happen.
Identification of the study groups, involved variables -independent, dependent, and control-.
Methodology description. Steps needed to get data.
Results. It includes data statistical analysis. This step involves testing the observations.
Discussion and Conclusion, through which the hypothesis might be rejected or accepted.
In the exposed example, the researcher has already collected field data, and made analysis.
Probably, the marine biologist noticed, while analyzing the results, that turtles lay eggs from May to October. But there might have been a biotic or abiotic factor threatening the survival of the eggs during august.
According to the analysis the researcher concluded that the nest season involves monthes between may and october, and august turns to be the most critical month for nesting.
The correct option is C.
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If a plant died from lack of food provided by photosynthesis, which structure is most likely missing or damaged
Wings of birds,wings of insects and patagia of bats are analogous organ? why
Mandela's cancer began in skin cells and then spread to cells in the liver and brain. What type of cancer does this situation describe
Metastatic melanoma skin cells and then spread to cells in the liver and brain.
Metastatic melanoma is a disease that occurs when the cancerous cells from the original tumor.
Where does melanoma usually spread to first?The first place a melanoma tumor metastasizes to is the lymph nodes, by literally draining melanoma cells into the lymphatic fluid, which carries the melanoma cells through the lymphatic channels to the nearest lymph node basin.
Thus, Metastatic melanoma is the answer.
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What properties do all solids share?
Answer:
Solids have many different properties, including conductivity, malleability, density, hardness, and optical transmission, to name a few.
Explanation:
dont know why my answer got deleted but here's a different answer :'(
PLEASE HELP ME ANSWER THIS!!!!!
Outline a heart-healthy “plan” for a person’s whole life: in other words, provide at least two pieces of advice appropriate for a person interested in heart health across their lifespan. Discuss advice appropriate for newborns or very small children; young adults between 18 and 24 years of age; someone in their 40s; and someone over 65. Provide at least one piece of age-appropriate advice specific to the interests, activities, and general health of an average person in each age group.
A heart-healthy plan for everyone is to eat lots of fruits and vegetables. It's also important to eat low-fat dairy products.
The heart is a vital organ in the body as it keeps the circulation of blood. For children, they should be served fruits and vegetables everyday. They should also eat whole grains.
For adults, they should eat more fish and less red meat. They should also eat lots of fruits and vegetables. Nuts, beans, legumes, and low-fat dairy products are also important for the heart.
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Give reasons :
a) Nylon clothes should not be worn in the kitchen.
b) Cotton fibre is used to make bath towels.
c) Umbrellas and raincoats are made from synthetic fibres
Answer:
a) It is dangerous to wear nylon clothes while cooking because it is a synthetic cloth and they catch fire easily also they can stick on our body which is very painful.
b) Cotton is a natural product. And unlike synthetic fibres, it is more absorbent. The towel hence has high absorbency.
c) Nylon and polyester are two fabrics most commonly used in raincoats and umbrellas. They are not absorbent the way natural fibers are. They naturally resist waterlogging, and can be made waterproof.
As world population grows and the ocean is called on to provide more and more resources, what can people do to be sure the resources are used sustainably?
What does fat become after the chemical process?
Answer:
uR mOtHeR
Explanation:
dUnno im sorry and very bored
In your own words, explain why photosynthetic cyanobacteria were likely the first organisms to survive and thrive in the harsh conditions on early Earth.
Explanation:
cyanobacteria are aquatic and photosynthetic, that Is they live in the water, and can manufacture their own food.Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see.they have the distinction of being the oldest known fossils more than 3.5billion years old, in fact! it may surprise you then to known that the cyanobacteria are still around,they are one of the largest and most important group of bacteria on
!!!!ILL GIVE BRAINLIEST AND 20 POINTS!!!!!
List three major events in cell theory development.
Answer:
These findings led to the formation of the modern cell theory, which has three main additions: first, that DNA is passed between cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically.
1. In 1683, Leewenhoek discovers bacteria.
2. In 1857, Kolliker describes mitochondria in muscle.
3. Ruska builds the the first transmission electron microscope.
Hope that helped in some way. x
Which statement is true about the particles in liquid water at 100°C and the particles in steam at 1000C? (Select ALL that apply)
the particles will have the same kinetic energy
the space between the particles is different with more space between particles in a gas
the particles will have different kinetic energy
the space between the particles is different,with less space between particles in a gas
The particulate nature of matter explains that when a substance gets heated it particles gets energised and they move away from one another in a random manner, hence the correct options are
The space between the particles is different with more space between particles in a gasThe particles will have different kinetic energyWhat happens to particles when they are heated
With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.
With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly
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An antibody is a foreign substance in the body.
a. True
b. False