Answer:
Distanced covered = 20km
time taken = 4 hrs
speed = S/t
=20 /4 = 5 km/hrs
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Answer: 5 km per hour
Explanation: If you set up a unit rate, you can simplify to find the answer.
20 km ?
------------ = ---------------
4 hr 1 hr
Use the crisscross method, so 20 times 1 is 20, and 20 divided by 4 is 5, so the answer is 5 km per one hour.
The distance between earth and the moon is about 384,100 km distance can be written in scientific notation is 8×10 to the power of the kilometers were a equals blank and b = blank
Explanation:
The distance between Earth and the moon is about 384,100 km.
A number in scientific notation is given as :
[tex]N=x\times 10^y[/tex]
Where x is a real number and y is any integer
In scientific notation, the distance between Earth and Moon is :
[tex]d=384100\ km\\\\d=3.8\times 10^5\ km[/tex]
It means a = 3 and b = 5.
Sam saw something terrifying. His muscles tensed, he began breathing more rapidly, and he began to sweat. Having taken introductory psychology, Sam knew that the ________________ division of his __________ nervous system had been activated. 0 points sympathetic; limbic parasympathetic, autonomic somatic, peripheral central, sympathetic
Answer:
sympathetic and autonomic
Explanation:
Hello there! :D
Firstly, I want to say that some of the written out answers look incomplete. I am going to try my best to answer this question and give you context so that you can choose the best answer choice! :)
There are two main systems within the boundaries our nervous system:
The CNS (central nervous system) and the PNS (peripheral nervous system).
Struturally,
the CNS constistues the brain and spinal chord,
the PNS consistutes your nerves and ganglion.
Functionally, the CNS recieves messages from the PNS and sends messages to the PNS. Think of the CNS as the control center, and the PNS as the reactor.
The PNS has two systems within it, the somatic nervous system, and the autonomic nervous system. The somatic nervous system senses things consciously percieved (ie. eye sight, pain, taste) and the autonomic nervous system senses things unconsciously percieved and controled (ie. stress, anxiety, etc). The point being, you cannot control when it happens or stop the function of it consciously.
The autonomic nervous system holds two main systems, which would be the parasympathetic system and the sympathetic system. The parasympathetic system helps maintain your circadian rythmn, replenish energy, and relax your body. The sympathetic system is known as your "fight or flight" system. This system can be triggered by test anxiety, unsafe situations, and in any case where your life or emotional well being is being threatened.
My best answer for this question, in my opinion, would be the autonomic nervous system, and the sympathetic system. The sympathetic system deals with fear (fight or flight) and is controlled by the autonomic nervous system).
I hope this helps you and you have a wonderful day,
Kai xx
PLZ ANSWER SOON What did J.J. Thomson’s experiments with cathode-ray tubes imply about the mass of an electron?
-Electrons are many thousand times larger than the nucleus and negatively charged.
-Electrons are many thousand times smaller than the nucleus and positively charged.
-Electrons are many thousand times smaller than the nucleus and negatively charged.
-Electrons are many thousand times larger than the nucleus and possess no charge.
Answer:
Electrons are many thousand times smaller than the nucleus and negatively charged.
Explanation:
Electrons possess negligible mass and carry a negative charge.
If you would like FREE tutoring in chemistry or another subject, check out www.growthinyouth.org.
Which one of the following statements is false? Select one: a. The ovaries are almond shaped. b. The ovaries are suspended from the anterior aspect of the broad ligaments. c. The ovaries lie in the ovarian fossa. d. The ovaries receive blood from the ovarian and uterine arteries.
Answer:
d. The ovaries receive blood from the ovarian and uterine arteries.
Explanation:
All the other options are correct except option D.
The ovary is only supplied with oxygenated blood from the ovarian arteries. The uterine arteries supply blood to the uterus alone.
1. Which two structures are found in all plant epidermal cells? A cell wall and chloroplasts B cell wall and nucleus C chloroplasts and starch grains D nucleus and starch grains
Answer:
B. cell wall and nucleus.
Explanation:
the cell wall, cell membrane, nucleus, cytoplasm and a large vacuole are contained in all plant cells.
The epidermal layer is the outer most of the plant. It is made up of parenchymatous .
Option B cell wall and nucleus C chloroplasts and starch grains
Parenchymatous cell The parenchymatous cell are generally isodiametraic, polygonal and elongated in shape.There walls are thin and made up of cellulose.It performs photosynthesis, storage and secretion. What is epidermal system in plants?
Epidermis, in botany, outermost, protoderm-derived layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The epidermis and its waxy cuticle provide a protective barrier against mechanical injury, water loss, and infection.
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Proteins are one of the four main types of _________
Answer:
Proteins, carbohydrates, nucleic acids, and lipids
Explanation:
These are the 4 specific types.
Answer: carbohydrates, nucleic acids, and lipids
Explanation: i hope this helps :)
Which statement accurately describes the outer planets
Answer:
the outer planet have thin atmosphere
Answer: D
Explanation:
Choose all the answers that apply.
The cell wall
is thick and rigid
is made of cellulose
does not allow the transport of chemicals
is only present in animal cells
supports and protects the cell
Answer:
is made of cellulose.
Explanation:
only plant cell have cell walls.
What is the difference between science and trickery?
Science is- by definition understanding the natural and social world following a systematic methodology based on evidence. Proof is needed, experiments take place etc. Whereas trickery is simply the act of deception, can be for multiple reasons.
However trickery exists in the natural world too in the form of animals using tricks to make themselves look frightening or like another animal. In both cases you cannot believe what you see. The difference would probably be that the tricks science plays can be uncovered by experiments and other observations, but im not sure.
Your question has been heard loud and clear.
Science is basically the logic that explains why things happen and how they occur the way they are , especially with natural phenomena. It is solely used for beneficial purposes so that humans can advance and develop themselves through science.
Trickery is the art mastered by people who just live by using shortcuts and making loopholes out of everything to bypass consequences. It is indeed the complete opposite of science because trickery is not used for improvement like science , but it is used to bring others down while the trickster rises. It is not beneficial for development and advancements. Trickery is however useful to the person using it , and science is useful to the person using it and to the people , but trickery is only beneficial for the person using it , unlike science.
Thank you
factor that changes as a result of changes in other variables
Answer:
dependent variables 2.independent variable .Explanation:Explain the importance of DNA Describe where it is found in the cell Summarize steps to extracting DNA (You need all 4 steps- how it is done and why it is done) Include any safety precautions and PPE that will need to be followed or worn and why Should be in a logical order. Please and thank youuuuuuuuuuuuu
Answer:
deez nuhtzz
Explanation:
en yo mowth
2. Empirical evidence is based on opinion and personal experiences. a. true b. false
Answer:
false
Explanation:
"Empirical" means "based on observation or experience," according to the Merriam-Webster Dictionary. Empirical research is the process of finding empirical evidence. If there are flaws in the way that empirical data is collected, the research will not be considered valid.
One hydrogen bound is
Answer:
a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
Explanation:
Which chemical damages the protective ozone layer?
A. Greenhouse gases
B. Carbon dioxide
C. Nitrogen
D. Chlorofluorocarbons
Answer:
D. Chlorofluorocarbons
Explanation:
HELP........................................
Answer:
D. If an earthworm is given a choice, it will move toward darkness rather than light.
Explanation:
A hypothesis must be a declarative statement that can be tested. That is the only one that follows the guidelines for a good hypothesis.
A researcher collected a single-celled organism from birdbath water and grew the organism in a laboratory. The researcher observed the organism reproducing by cell division, which resulted in identical offspring generations. This organism exhibits a form of
Answer: The organisms exhibit a form of Asexual reproduction.
Explanation:
This is a form of asexual reproduction because Asexual reproduction is a form of reproduction where a single celled organisms or muiticellular organisms produce or divide to produce offsprings that are genetically identical without fusion of gametes and exchange of genetic materials.
This type of reproduction includes binary fission( where an organism divides into two), fragmentation( where an organism divides into fragments), budding, spore formation e.t.c.
Don't know how to do it
What is the main ingredient in magnets? *
A. Gold
B. Copper
C. Bronze
D. Silver
E. Iron
F. Magnesium
Answer:
Magensium
Explanation:
Answer:
iron
Explanation:
The metal called ferromagnetic metals that goes along with nickel and iron
Computer modeling gives scientists the ability to study the interaction of complicated systems
without actually conducting an experiment. Is this
True or false.?
Answer:
it is true
Explanation:
Computer modelling can be defined as the computerization of mathematical models in order to understand the dynamics of biological, physical, and chemical systems. The computerized simulations can be run by using programs that have into account the parameters of the system and thus make predictions that resemble natural experimentation procedures. Examples of computer modelling include, among others, the potential distribution of invasive species, prediction of changes in the genetic structure of a given population over n generations, etc.
Experiment #1 Question: Does penicillin prevent infection? Hypothesis: If the medicine prevents infection, then the medicine will prevent the growth of bacteria that cause infection. Experiment: Leo placed two circles of paper in a Petri dish (something used for growing bacteria). One circle of paper was soaked in penicillin. The other had nothing on it. He poured a liquid filled with bacteria into the Petri dish. Both circles of paper were placed in the Petri dish about 3cm apart. At the end of the experiment, a circle with a radius of 2cm formed around the circle of paper soaked in penicillin. There were no bacteria growing in the 2cm circle. No change had occurred around the other circle of paper. The bacteria were growing well.
A. What was the independent variable?
B. What was the dependent variable?
C. What was the control condition?
D. Was there a constant variable?
Answer:
A- presence or absence of penicillin
B- growth of bacteria
C- Petri dish,bacteria, penicillin, paper
D- circle of paper without penicillin
List the monomers and polymers of carbohydrates, lipids, proteins, and nucleic acids.
Answer:
monomer of carbohydrates glucose,sucrose,fructose
polymer of carbohydrates starch,cellulose,glycogen
monomer of protein amino acids
polymer of protein polypeptides
monomer of nucleic acid nucleotides
polymer of nucleic acid DNA
polymer of lipids triglycerides
monomer of lipids 3 fatty acids and glycerol
Monosaccharides are the monomers and polysaccharides are the polymers of carbohydrates. Amino acids are monomers and polypeptides are the polymers of proteins. Nucleotides are the monomers of nucleic acid and polynucleotides are the polymers of nucleic acids. Fatty acids and glycerol are monomers and triglycerides are the polymers of lipids.
What are monomers and polymers?Lipids, Polysaccharides, Proteins and Polynucleotides are the four major groups of macromolecules that are found in the bodies of all living organisms. These are also called biomolecules.
Monomers are small molecules which are generally organic. These molecules combine with other similar monomers which form large molecules. These are polymers. All the monomers can form chemical bonds with at least two monomer molecules.
A class of synthetic substances that are composed of multiples of simpler units or monomers are called polymers. These are the chains of monomers which have a nonspecified number of monomeric units.
Therefore, monosaccharides are the monomers and polysaccharides are the polymers of carbohydrates. Amino acids are monomers and polypeptides are the polymers of proteins. Nucleotides are the monomers of nucleic acid and polynucleotides are the polymers of nucleic acids. Fatty acids and glycerol are monomers and triglycerides are the polymers of lipids.
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helpppppppppppppppppp
Using radio telescopes, astronomers have found evidence the new matter is forming in the universe, which is what the big bang theory predicted.
Your answer is B
Well since the big bang theory already supports the idea of new matter forming, we are using new technology to prove an existing theory
In this case, we are using new technology to prove existing theories. NOT making new ones, or modifying them.
Which of the following is NOT a type of biodiversity?
A. The amount of different species in one area
B. The genetic diversity of a species
C. The amount of different ecosystems in an area
D. The amount of different types of rocks in an area
Do you ever feel like you can say things on the Internet that
you wouldn't say in real life? Why or why not?
Answer:
yes because you aren't face to face with anyone your saying it to. If you were, you might not say something like that.
Some people are shy in nature, they can not express themselves in front of the people, so they adopt a virtual method of communication that is via internet.
what is internet ?Internet is a global system of interconnected computers and it uses a standardized Internet Protocol, used for communication and sharing information is called the Internet.
The Internet is a revolutionized communication and technology across the Globe, these are computerized devices initially used for large industries but later the usage increased massively.
The different ways to connect the Internet via dial-up connections where user link their phone line to a computer to access the Internet but the cannot make or receive phone calls.
Another mode of connection is Broadband which provide either cable or phone companies, is a high-speed internet connection, Wireless Connection provide wi-fi or mobile services, in this case Internet can be connected anywhere.
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Analysis in which general conclusions are drawn from specific observations is called
a. deductive reasoning
b. inductive reasoning
c. reductive reasoning
d. productive reasoning
Answer: Option B
Inductive reasoning.
Explanation:
It is inductive reasoning because inductive reasoning is a type of reasoning in which general informations are made based on some specific observations or information even when the conclusion is not complete guaranteed to be true.
This means that you make a guess's or generalizations based on the information you have at hand.
For example; The left handed people the you know uses left hand in right and you now make the conclusion that all left handed people write with their left hand only.
ATP is produced by cellular respiration in your human body cells. There are a variety of enzymes that work to produce ATP, but one of those enzymes is called phosphofructokinase-1. This enzyme is sensitive to blood acidity. Blood can become more acidic if a patient is in respiratory distress.
Answer:
Please see below
Explanation:
For a patient suffering from respiratory distress, the increase in blood acidity further effects the functionality of the enzymes. Some variables that have an effect on enzyme function are listed below:
The pH. Every enzyme has an optimal pH at which it works bestThe surrounding temperature. Too high a temperature can denature an enzyme Amount of ATP availableThe product formed as a result of enzyme actionWhat is the function of a nerve cell in a multicellular organism? (1 point) A. carry and transmit signals B. produce and manage movement C. make and move protein D. store and distribute oxygen
b produce and manage movement
Explanation:
nerve cells are there to move muscles, send signals to glands, or register sensory stimuli.
the function of a nerve cell in a multicellular organism is to carry and transmit signals. Thus Option A is correct.
What is the function of nerve cell ?Nerve cells or neurons are the specialized cell for communication which is under the nervous system.
It is composed of cell body with nucleus, axon and dendrites.
Axon and dendrites are the long extension from cell body where as dendrites receive signal and conduct the signal to the cell body.
It involve in transmitting the information throughout the human body, by generating electrical signals called action potentials.
The nerve cell also helps the body in the smooth conduction of metabolic activities.
It involve in both the voluntary and involuntary movement of the body parts.
The communication between the central nervous system is established by the help of nerve cell and the body parts by enabling the smooth transmission of messages.
Thus Option A is correct.
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Some mammals help maintain their body temperature by sweating when their bodies rise in temperature. Which property of water is responsible for the ability of sweat, which is mostly water, to help lower body temperature? Water absorbs heat by breaking hydrogen bonds. Water changes in density when it changes from a gas to a liquid. Water's ability to dissolve solutes, such as salt Water's ability to form hydrogen bonds with skin cells
Answer:
Water absorbs heat by breaking hydrogen bonds.
Explanation:
Specific heat is the amount of heat that must be absorbed or lost for 1 gram of that substance to change its temperature by 1 degree. As someone works out, their body releases sweat to keep their body from overheating. Specific heat it mentions that hydrogen bonds between water molecules require heat to form and break, which is what happens when we sweat.
an ice cube has the following dimensions :
5.5cm - 8.0cm - 8.4cm
its mass is 340g.Calculate:
a-its volume
b-its density
Answer:
The correct answer would be :
1 volume = 369.6
2. density = 0.9199
Explanation:
Given :
dimensions : 5.5cm - 8.0cm - 8.4cm
Mass : 340 g
Formula :
volume = side * side * side
density = mass/ volume
Solution :
volume of ice cube would be
= 5.5cm * 8.0cm * 8.4cm
= 369.6 m³
density of ice cube would be
= 340/369.6
=0.9199
Thus, the correct answer would be
1 volume = 369.6
2. density = 0.9199
A membrane which allows all substances to pass through is ________________________ non-permeable c. permeable partially permeable d. impermeable
Answer:
A membrane which allows all the substances to pass through is called permeable membrane.
Explanation:
Hope it will help ^_^