1. Define physical change.
2. What are some examples of physical change?
3. The wood in the Figure below is being cut with a chainsaw. Is this a physical change?
Why or why not?
the blood speed in a normal segment of a horizontal artery is 0.15 m/s. An abnormal segment of the artery is narrowed by an arteriosclerotic plaque down to one fifth its normal cross sectional area. What is the difference in blood preassures between the normal and constricted segments of the artery. The density of the blood is 1060
Answer:
286.2 pa
Explanation:
Blood speed in a normal segment of a horizontal artery ( v2 ) = 0.15 m/s
Density of blood = 1060 kg/m^3
Normal sectional area = A2
constricted sectional area ( A1 )= 1/5 A2
Determine the difference in blood pressures between the normal and constricted segments
we will apply Equation of continuity Av = constant
Δ p = 12 PV^2
= 12 * 1060 * ( 0.15 )^2
= 12720 * 0.0225 = 286.2 pa
attached below is a detailed solution of the Given problem
Which of the following is not correct about diffraction?
Answer:
Diffraction occurs just with electromagnetic waves.
Explanation:
The information that should not be true about diffraction is that it arise with the electromagnetic waves only.
What is diffraction?It is considered as the process where the beam of light or the other system waves should be spread out that leads of passing via the narrow aperture or it should be an across of an edge that should be accompanied by interfering between the formation of the waves that should be generated.
So the above information should be considered.
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A BISC 220 student went swimming at the Uytengsu Aquatics Center. Having missed an important lecture on the respiratory system, he thought it would be a good idea to hyperventilate for a minute before diving into the pool and swimming vigorously underwater. Shortly after he began swimming, he lost consciousness and would have drowned if not for the quick action of the lifeguard. Which one of the following best describes what happened?
A. Hyperventilation increased the Poz in his blood, which inhibited the brainstem respiratory center.
B. Hyperventilation decreased blood Pco2, which reduced respiratory drive at the same time that exercise increased the demand for O2
C. Skeletal muscle activity caused an increase in blood pH, which suppressed brain function and made him faint.
D. Hyperventilation increased the saturation of hemoglobin with O2, but vigorous exercise caused the bound O2 to be replaced by CO2
Answer:
B. Hyperventilation decreased blood Pco2, which reduced respiratory drive at the same time that exercise increased the demand for O2.
Explanation:
Hyperventilation is a breathing at an abnormal rate. There is an increased rate of loss of carbon dioxide which causes an increased demand for the oxygen. The respiration process is affected due to hyperventilation.
Someone help thank you
Answer:
because its faster
Explanation:
DNA __________ joins _______to synthesize a new __________DNA strand
Briefly explain the nature of scientific inquiry. Include discussion of the role that evidence and falsifiability play in the process. Is this a strength or a weakness of the scientific mode of
thinking?
Answer:
Science is a process that involves proof and error. Scientific hypotheses are used to find evidence supporting scientific statements, but new evidence can be used to reject previously accepted ones in order to get closer to the truth.
Explanation:
Scientific inquiries refer to the processes by which scientists study phenomena of the natural world and propose alternative explanations (hypotheses) useful for understanding such mechanisms. When hypotheses are supported by many evidence and studies from different sources, scientific theories associated with these hypotheses become accepted by the scientific community. In science, a scientific statement may become falsifiable when it is contradicted by new lines of evidence and/or new observations.
Name two types of proteins that regulate the cell cycle.How do these proteins work?
Answer:
Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.
Explanation:
Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur while external regulators speed up or slow down the cell cycle.
What are Proteins?Proteins are large and complex molecules which play many critical roles in the body. Proteins do the work in cells which are required for the structure, function, and regulation of the body's tissues and organs.
Proteins are made up of many smaller units called amino acids, which are linked together in long chains. There are 20 different types of amino acids that can be linked to make a protein.
The sequence of amino acids determines each protein's unique 3-dimensional structure and its specific function. Amino acids are coded for by a combination of three DNA building blocks (nucleotides), which are determined by the sequence of genes.
Thus, internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur while external regulators speed up or slow down the cell cycle.
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Infer: In which part of Earth's core do
convection currents occur?
Answer:
mantle
Explanation:
Convection currents in the Earth occur in the mantle. The core of the Earth is extremely hot, and material in the mantle close to the core is heated..
Why does warm air always rise at a front?
Question 10 of 23
Which characteristic makes a digital signal more useful than an analog signal
for storing information?
A. A digital signal includes a spectrum of colors.
B. A digital signal is ngore difficult to copy.
C. A digital signal cannot be heard by humans.
D. A digital signal moves between a discrete number of values.
SUBMIT
Answer:
D. A digital signal moves between a discrete number of values.
Explanation:
A-P-E-X
Modern research has indicated that the appendix has at least one important function _____.
Modern research has indicated that the appendix has at least one important function _____.
a storehouse for good bacteria
fights intestinal infection
aids in digestion
secretes hormones
produces insulin
Answer:
The correct answer is - a storehouse for good bacteria.
Explanation:
The appendix is a finger-like small narrow-sized pouch that founds out from the colon. Initially, it was thought to a vestigial organ that has very little or no function in the human body.
In modern and more recent research suggests that the appendix has a very important role as it works as a reservoir or storehouse for beneficial gut bacteria.
Which trophic level do anacondas and jaguars fill in the Amazon rainforest?
Answer:
tertiary consumer
Explanation:
PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! LINKS WILL BE REPORTED!!
Similarities in DNA sequence can be seen in all species
A. Anatomical Evidence
B. Homologous Structure
C. Analogous Structures
D. Vestigial Structures
E. Fossil
F. Embryology
G. DNA/Molecular Evidence
Answer:
I think G.
Explanation:
It mentioned DNA and Molecular evidence and every living thing has that.
how do you feel nonrenewable energy impacts the environment?
Answer:
Explanation:
Non renewable energy typically releases carbon dioxide, methane, and other gasses into the atmosphere.
Match the bacterial type with its proper definition. An answer choice can only be used once. A. Requires oxygen, but is toxic at atmospheric concentrations B. Can use oxygen for growth or can grow without it C. In fluid thitoglycollate medium, shows growth only at the top area of the medium D. Oxygen is completely toxic to it A. microaerophile B. facultative anaerobe C. obligate aerobe D. obligate anaerobe E. aerotolerant anaerobe
Answer:
ABCDExplanation:
Bacteria is classified into 5 different groups basically on their shapes which are spherical, rod, spiral, vibrios and corkscrew
A) Requires oxygen, but is toxic at atmospheric concentrations
Microaerophile
B) Can use oxygen for growth or can grow without it
Facultative anaerobe
C) In fluid thitoglycollate medium, shows growth only at the top area of the medium
Obligate aerobe
D) Oxygen is completely toxic to it
Obligate anaerobe
Which of the following is undesirable when developing organic compost?
a)treated sawdust
b)decomposition
c)nematodes
d)kitchen detritus
Answer:
C.
Explanation:
nematodes are roundworms and are undesirable
List at least 5 importance of gravity in our daily lives
Answer:
- helps us stay on the ground (without gravity we would float and float into space and inevitably die)
- helps us hold things in our hands (even if we let go the objects won't go flying)
- makes it easy for us to do daily things
- lets us understand why things happen and why objects fall to the ground
- suns gravity helps keep the earth the great amount of distance away from the sun so we can get the exact amount of sunshine
What three processes or forces
combine to set convection
currents in motion?
Answer:
There are three types of heat transfer: radiation, conduction, and convection. Heating and cooling of the fluid, changes in the fluid's density, and the force of gravity combine to set convection currents in motion.
Explanation:
There it is what is the answer
Answer:
I'm confused what's the question???
Given that cellular respiration uses oxygen and produces carbon dioxide, which of the following statements can be inferred from the diagram shown above?
A. Animals participate in cellular respiration, while plants participate in both cellular respiration and photosynthesis.
B. Animals do not rely on plants for survival.
C. Animals participate in cellular respiration because it results in the same products as photosynthesis.
D. Animals participate in cellular respiration, while plants do not.
Answer:
A. Animals participate in cellular respiration, while plants participate in both cellular respiration and photosynthesis.
Explanation:
The option (A) is correct. Animals participate in cellular respiration, while plants participate in both cellular respiration and photosynthesis.
What do you mean by cellular respiration?Cellular respiration is the process by which biological fuels are oxidized in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, to drive the bulk production of ATP.
Cellular respiration is a series of chemical reactions that break down glucose to produce ATP, which may be used as energy to power many reactions throughout the body. There are three main steps of cellular respiration: glycolysis, the citric acid cycle, and oxidative phosphorylation.
During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation.
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In plant and animal adaptations, form follows function. True or false?
Answer:
FALSE
Explanation:
In plant and animal adaptations, form follows function. it is true because all forms of organisms give adaptive advantages.
AdaptationLiving beings tend to have adaptations according to the environment in which they live. Plants in hot and dry climates generally have their leaves reduced, or even modified into thorns, as a way of reducing the contact surface and thus avoiding transpiration.
Whit this information, we can conclude that in plant and animal adaptations, form follows function. it is true because all forms of organisms give adaptive advantages.
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What enzyme deficiency in RBC leads to hemolytic anemia due to oxidative stress?
In some cases, massive destruction of red blood cells caused death. This drug-induced hemolytic anemia was shown 30 years later to be caused by a deficiency of glucose 6-phosphate dehydrogenase, the enzyme catalyzing the first step in the oxidative branch of the pentose phosphate pathway.
in short terms, glucose 6-phosphate dehydrogenase
PLEASE HELP WITH THIS!!!
Answer:
my mama is my mom
Explanation:
mum gae
2. Define the structure of DNA by filling in the
descriptions below
Answer:
Please refer to the explanation below.
Explanation:
The sugar and phosphates molecules form the sides of the helix.
The nitrogen bases form the teeth of the helix.
Each nucleotide is made of a nitrogen base, a sugar, and a phosphate group.
Which of the following best describe gas particles?
SELECT ALL THAT APPLY
a moving randomly
b collide into each other
Cmove slow
d high kinetic energy
moving orderly
e moving orderly
Answer:
a, b, d (see below)
Explanation:
So, looking at the 3 states of matter:
Solid - holds a shape and is made up of particles that vibrate in place (because particles are always moving no matter what)
Liquid - holds shape of its container and has particles with some space in between them that allow them to flow
Gas - holds shape of its container and has particles with huge gaps of space between them that are always, constantly moving and zooming around
Refer to the image below for a better visual understanding.
So, now, looking at the answer choices:
a) moving randomly
Yes. They are—they're speeding around super fast all the time.
Every time heat is added to something, the particles start loosening up and moving. A lot.
So when you add heat to a solid, it starts loosening up and moving around until it becomes flowy enough to be a liquid. Then, if more heat is added, the particles moving faster and loosen up even more until they're a gas.
Imagine doing that one more time, and you'll have plasma. As you may have guessed it, plasma moves super fast
b) collide into each other
Yes. Because they're moving so fast and uncontrollably all the time, they're bound to have rammed into one another a few or more times.
Imagine bumper cars at a carnival, except the speed of each car is sooo fast that you could be on a highway. You're probably going to hit someone, which is why bumper cars are not that fast in reality. For safety reasons.
c) move slow
No. Since we know that they're always zooming around (refer to my bumper car example above, in bold), they obviously can't be slow.
d) high kinetic energy
Yes. Anything moving (a.k.a. in motion) has kinetic energy. If gases zoom super fast 24/7, they will have high kinetic energy.
Having high kinetic energy means that the something is moving really fast or a lot. In this case, gases are both.
e) moving orderly
No. They're moving everywhere and really fast, so they have no control over how they move because of how fast they are.
(refer to my bumper car example in answer b, in bold)
During the formation of metamorphic rocks, what most likely causes pressure to increase?
Answer:
Magma pockets rise.
Explanation:
Answer:
It should be D, rocks beneath Earth's surface are forced toward the mantle.
Explanation:
edge2021
Which of the following best describes how the RNA sequence specifies the production of an amino acid chain?
A.
Each individual RNA base codes for three amino acids.
B.
Each group of three RNA bases codes for an enzyme that connects amino acids.
C.
Each individual RNA base codes for a ribosome location where amino acids are assembled.
D.
Each group of three RNA bases codes for a specific amino acid.
Answer:
The answer is B Each group of three RNA bases codes for an enzyme that connects amino acids.
Ashton is a crime scene investigator. He ensures that all the evidence gathered at the scene is properly handled and labeled. What is Ashton protecting?
Ashton ensures that the (blank) the documentation of who possesses evidence at all times, is protected by properly handling and labeling evidence.
when it says (blank) it means evidence evidence.
where is the best place to find information about the hazards that area associated with a compound
Answer:
Read a Material Safety Data Sheet (MSDS).
Explanation: