8. A scoop of ammonium nitrate is added to a beaker of water. Which is a quantitative observation of the experiment?
A. The ammonium nitrate dissolved in the water.
B. The temperature of the water decreased by 5°C.
C. A chemical reaction occurred.
D. The solution did not change color.
Answers
The correct answer is B. The temperature of the water decreased by 5°C
Explanation:
Temperature and the changes in it are part of quantitative observations because these can only be measured and understood through numbers. Indeed, the temperature is globally measured through different numerical scales such as the Celsius or the Kelvin scale. This does not occur in other qualities such as color because this is considered and analyzing using qualities or traits rather than values. According to this, the correct answer is "The temperature of the water decreased by 5°C."
Related Questions
List all the things in a plant cell.
Answers
Answer:
this guy above me is right
Explanation:
Please help me?????!!!
Answers
Answer:
W
Explanation:
Since the roller coaster is at a higher point on W than Y, the PE is also higher.
• What are three infectious diseases?
• What are three ways that infectious diseases can be prevented?
• How does a vaccination work?
• How do antibiotics work on bacteria and why don’t they work on viruses?
Answer all questions. Leave none unanswered
Answers
Wash your hands
A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response.
Antibiotics fight bacterial infections either by killing bacteria or slowing and suspending its growth.
Why are the enzymes in snake venom so dangerous to the human body?
Answers
Answer:
Snake venom involves enzymes, proteins and substances with a cytotoxic, neurotoxic effect and coagulants.
Explanation:
Snake venom is very deadly because of the enzymes it contains. For example, Snake venom hinders cholinesterase which causes loss of muscle control.
If 1/32 of a parent material is left, compared to 31/32 of daughter, and the half-life is 50,000 years, then how
old is the sample?
--
Answers
Answer:
251449 years
Explanation:
We can obtain the age of the sample by using the formula;
t1/2 = t ln2/ln(No/Nt)
Where;
t1/2 = half life = 50,000 years
t= elapsed time = the unknown
No = amount of radioactive material originally present
Nt= amount of radioactive material after time (t)
Note;
Since Nt/ No = 1/32
Then No/Nt= 32/1
Substituting values
t= t1/2 ln(No/Nt)/ln 2
t= 50000 × ln(32/1)/ln 2
t= 50000 × 3.47/0.69
t= 251449 years
why is staghorn coral so vulnerable
Answers
Answer:
This loss can lead to coral death through starvation or increased vulnerability to diseases
Explanation:
ribosomes are the most
essential organelle in the cell. Include Evidence of at least 3 organetles that support the ribosome in accomplishing its fonction for at the cell.
Answers
Answer: Ribosomes work along with most of the organelles because they make the proteins that they need to perform. Mitochondria, which generate energy by breaking down carbohydrates, and chloroplasts, which store energy as sugar for plants, algae and some fungi, have their own DNA along with ribosomes to read its instructions. Messages from the nucleus are sent into the endoplasmic reticulum where the ribosomes are located.
Explanation:
The ribosome primarily functions as an organelle for the synthesis of proteins. The 3 organelles that help ribosomes in accomplishing their functions include the nucleus, the Golgi apparatus, and the endoplasmic reticulum.
In order to successfully synthesize proteins, hereditary information on DNA must first be transcribed into genetic codes as messenger RNA in the nucleus. Thereafter, the mRNA undergoes some processing before being transported from the nucleus to the cytoplasm where it binds with the ribosome and gets translated to amino acids.
The amino acids are linked together by peptide bonds to form the primary structures of proteins. The proteins are then folded in a specific manner by the Golgi apparatus depending on the functions they are to perform.
After folding, the synthesized proteins are then transported to their target sites by the same Golgi apparatus via the channels created by another organelle known as the endoplasmic reticulum.
More on protein synthesis can be found here: https://brainly.com/question/1815819
Someone help me plz
Answers
Answer:
polyploldy is the answer
Natural selection is referred to as "Survival of the Fittest". What does being the most "fit" mean
Answers
Answer:
The best to adapt.
or the one with the set of skills vital to the situtation.
If were in the mountains, the one most "fit" will live. That will mean haveing a specfic body type.
If we could only eat nuts, i would die off. I have an allergy. My body is not "fit", so the "stronger" ones will prevail
Explanation:
⦁ Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
Answers
Answer:
I organized the data collected from the lab by using a table for each test. Table A contains the data collected from the table tennis ball and the golf ball, Table B contains the data collected from the inflated football and the deflated football, and Table C contains data collected from the question baseball and the data from Table C helps to find out whether or not the baseball is legitimate or altered.
Answer:
I organized the data collected from the lab by using a table for each test. Table A contains the data collected from the table tennis ball and the golf ball, Table B contains the data collected from the inflated football and the deflated football, and Table C contains data collected from the question baseball and the data from Table C helps to find out whether or not the baseball is legitimate or altered.
Explanation:
4
The discovery of cells was made possible by the invention and refinement of the microscope. Over the years, different individuals provided evidence
for what is now known as the cell theory, Four scientists are primarily credited with establishing the three basic concepts of the cell theory
Mark one box in each row of the table below to identify the scientist(s) most associated with the cell theory concept listed
Schleiden and
Schwann
Hooke
Virchow
All living things are made of cells; plants and animals are
made of cells
Cells come from cells: diseased cells produce diseased cells
The cell is the basic unit of life: cells can be studied
scientifically
Answers
Answer:
All choices are correct
Explanation:
The most well known was a botanist who studies plants too realized that plats,living things are made of cells so most likely the answer would be all living things are made of cells
I hope this helps, I am only in the 7th grade and this was pretty easy to me
How might a dramatic decrease in vegetation lead to a decrease in a prey species?
Answers
More the density of liquid, then
(a) Slower the sound travel
(b) Faster the sound travel
(c) More distance covered by the sound
(d) Less distance covered by the sound
Answers
Answer:
(a) Slower the sound travel
Explanation:
The speed of sound also depends on the material it is traveling on. The denser the liquid, the slower the sound can travel and the less denser the liquid, the faster the sound can travel. This is because denser materials have larger molecules than less denser materials. Sound waves travel through "vibration." It takes more energy to vibrate in denser objects than in less denser ones; thus this explains the slow travel rate of sound in a denser medium of liquid.
THE MUSCULAR
SYSTEM
Movements YOU CAN
VOLUNTARILY and
INVOLUNTARily clo
are controued by
the muscular System
more
SMOOTU Muscles
heb operate organi
OLUNTARY
e footh you
den
CARDIAC muscles
keep the heart Png
involuntary
3
all in
your
WORK
TUN
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Internal
1
Skeletal muscles
+Move your bones
*Voluntary
bladder
2
Toke
turns
Contracting
& Piping
4
4
Match the word phrase with the correct place on the chart."
1
2
3
4
Constantly at Work
Stomach
Connects Bones to Tendons
Typically Work In Pairs
Answers
Answer:
lots of spelling errors and unreadible words
Explanation:
Question 2 of 10
How many hydrogen atoms are present in each water molecule?
A. 2.
B. 4
C. 3
D. 1
Answers
Answer:
A
Explanation:
A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms
Answer:
there is two hydrogen atoms
What is transdifferentiation?
Answers
Answer:
a rare transformation of cells other than stem cells into different cell type
Answer:
the rare natural transformation of cells othwr than stem cells into a diffrent cell type
From where do the gems used in jewelry come?
They are nonmetallic minerals.
They are metallic ore.
They are nonmetallic silicates.
They are metallic minerals.
Answers
Answer:
Es verdad que el mundo de los diamantes y gemas preciosas siempre ha sido mágico y lleno de glamour y nos hace viajar por medio mundo en búsqueda de los yacimientos donde encontrar estas maravillas creadas por la naturaleza.
Pero además saber de donde vienen nuestras gemas y diamantes , es decir cómo son los métodos de extracción y dónde se realizan, nos da garantía de que estas serán legales y realizados por parte de los mejores profesionales.
En nuestra firma, Navas Joyeros cada diamante y piedra preciosa es lo más importante ya que es la parte esencial de la joya, eso sí, no descuidamos en absoluto la perfecta elaboración que llevamos a cabo en nuestras instalaciones del norte de Italia donde se produce las piezas de alta joyería.
Nuestros diamantes se obtienen desde origen de extracción a través de los sightholder autorizados por la Dtc , multinacionales que tienen la exclusiva de compra de los sights o adquisiciones oficiales de diamante en bruto, y que desarrollan su tallado para su comercialización mun
esmetalioc
Explanation:
Answer:
Nonmetallic minerals
Match each cell type to its correct description.
a. phagocytic blood cells
b. stems cell that differentiate into fibroblasts
c. create matrix of connective tissue
d. secrete pigment melanin
e. cause inflammation
f. second most abundant cell type and maintain matrix
g. specialized cell of the immune system
h. large phagocytic cells of the immune system
i. fat cells
1. fibroblasts
2. fibrocytes
3. adipocytes
4. mesenchymal cells
5. melanocytes
6. macrophages
7. mast cells
8. lymphocytes
9. microphages
Answers
Answer:
a. phagocytic blood cells - 9. microphages
b. stems cell that differentiate into fibroblasts - 4. mesenchymal cells
c. create matrix of connective tissue - 1. fibroblasts
d. secrete pigment melanin - 5. melanocytes
e. cause inflammation - 7. mast cells
f. second most abundant cell type and maintain matrix - 2. fibrocytes
g. specialized cell of the immune system - 8. lymphocytes
h. large phagocytic cells of the immune system - 6. macrophages
i. fat cells - 3. adipocytes
Explanation:
Almost all of these cells have one thing in common: they are part of the connective tissues in our body. Connective tissue can be divided into two: proper connective tissue (that can be loose or dense) and specialized connective tissue (in this category, for example, we can find blood tissue, adipose tissue, bone tissue, and cartilage tissue).
Cells in our bodies have very different but important functions and they partake in their tasks because of the specific tissue or organ where they are at. While blood tissue has cells that specialize in gas transport and immune response, the connective tissue has cells that synthesize and maintain the matrix and also specialized immune cells as well. Microphages, macrophages and lymphocytes can be found both in the blood tissue and the connective tissue as well, as they migrate from the bloodstream to the tissue where they are needed to perform immunity tasks. Also in the connective tissue, we can find other cells that participate in the immune response, like the mast cells that release histamine to produce inflammation.
( 15 points! ASAP PLEASE ) Choose one of these two scenarios, and use the scenario to demonstrate the meaning of E = KE + PE. Assuming the total energy is 10 (10E), write the equation for each step outlined in the scenario you choose.
A child ready to slide down a slide
While sitting at top:
Half way down slide:
When reaching the bottom of slide:
A child on a swing
At highest point in swing:
Part way down arc:
At bottom of arc:
Answers
Answer:
I choose the slide so here is the answer
Explanation:
At the highest point: 10E = 0KE + 10PE
Part way down: 10E = 5KE + 5PE
At bottom: 10E = 10KE + 0PE
In both the scenario, the object will experience different P.E. and K.E. at different situations.
At the highest point: 10E = 0KE + 10PE
Half-way down: 10E = 5KE + 5PE
At bottom: 10E = 10KE + 0PE
What is Total Energy?The total energy of a body is the sum of its potential energy and kinetic energy. Potential energy is the stored energy in any object or system. This energy is not affected by the external environment including air and height.
On the other hand, Kinetic energy is the energy present in a system or object which is in motion. The formula for the determination of potential energy and kinetic energy are as follows:
E = K.E. + P.E.
where, E = Total energy of an object
K.E. = Kinetic energy of an object
P.E. = Potential energy of an object
K.E. = 1/2m.v²
where, m = mass of an object
v = velocity of an object
P.E. = m.g.h
where, m = mass of an object
g = acceleration due to gravity
h = height
In the given scenario, while sitting at the highest point: 10E = 0KE + 10PE (K.E. is zero as the body will come at rest v = 0)
Half- way down: 10E = 5KE + 5PE (body will experience both P.E. and K.E.)
At bottom: 10E = 10KE + 0PE (Here, the height is zero hence P.E. is zero)
Same goes with the child swinging.
Learn more about Kinetic Energy here:
https://brainly.com/question/999862
#SPJ2
Hydrogen bonds form between which types of elements?
Answers
Answer:
Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen. These three elements are so electronegative that they withdraw the majority of the electron density in the covalent bond with hydrogen, leaving the H atom very electron-deficient
Explanation:
Why is the structure of the neuron up to 1 meter long?
Answers
Answer:
The cell body of a motor neuron is approximately 100 microns in diameter and as you now know. the axon is about 1 meter (1,000) millimeter in length.
Explanation:
So the axon of a motor neuron is 10,000 times as long as the cell body is wide.
Maria wondered if different colors of plastic wrap affected the time for bread to mold. She wrapped a
slice of bread in clear plastic wrap. Before wrapping the bread she placed 5ml of water in the center of
the bread. She repeated the process with a slice of bread using red plastic wrap & a slice of bread using
blue plastic wrap. The bread came from the center of the same loaf. In each case she used the same
amount of water and the same brand of plastic wrap. She wrapped the different slices of bread in the
same way.
Independent variable:
I
Dependent variable:
Control:
Answers
Answer:
Explanation:
An independent variable can be described as the variable that is intentionally altered during the experiment by the researcher and is not affected by any other variable involved in the course of the experiment. From this description, the independent variable in the question are the "plastic wraps".
A dependent variable can be described as the variable that is been experimented on or has the tendency to be affected by the independent variable. From this description, the dependent variable here is the "time" it will take for the bread to mold.
The control of an experiment can be described as the "normal" or the "standard" experiment in which other experiments in the same research of the same nature are compared with. From this description, the control of this experiment is the experiment done involving the clear plastic wrap.
Previous research shows that, in humans, the pelvic opening tends to be wider in females than it is in males. Required:a. Generate a hypothesis about what causes this pattern.b. Describe the type or types of data you would ideally collect to test this hypothesisc. Describe what hypothesis data might support the hypothesis (For example, the hypothesis would be supported if we found data that indicated....)d. Describe what hypothetical data might regret the hypothesis and how would you rewrite your hypothesis to account for your findings and begin again.
Answers
Answer:
Throughout the clarification portion elsewhere here, the context of the query is explained.
Explanation:
(a)
Null Hypothesis: The distance including its pelvic area between women and men does not vary.(b)
The X-ray as well as CT-scan of 20 stable people from various age categories will be obtained from the pelvic area. We're going to get statistics on the same combination of women and men. Way of measuring and cross-reference the pelvic area however according to gender. To assess the degree of importance, submit statistical measures (T-test).(c)
The width including its pelvic region must've been identified and therefore should not vary substantially throughout males and females to validate the data.(d)
Although we consider that the disparity in men's and women's pelvic regions is substantially different, the theory will be dismissed. Let's say the theory has been dismissed. But now the latest theory would be that "Women throughout the pelvic region are larger versus men."YOU GET 50 POINTS: Fill in the words
Answers
Answer:
meiosis
chromosome
partner
divides
chromosome
Four new cells
single set
please i need someone to answer this for me. its urgent!!!!
A scientist is trying to determine the age of a rock layer in O points a canyon using Uranium-234, an isotope of Uranium. It has a half-life of about 2,000 years. There originally was 400 radioactive atoms of Uranium-234. If the rock layer tested has 100 radioactive atoms of U-234 left, how many half lives have passed AND how old is the rock layer?
Answers
I also need help on it
Which two letters in the
diagram above identify
parts of the lipid bilayer?
A and D
A and E
B and C
C and D
Answers
The phospholipid bilateral is made of two parts, the head and tail. The head is hydrophilic whereas the tail is hydrophobic.
The phospholipid bilayer is made of two parts, the head and tail. The head is hydrophilic whereas the tail is hydrophobic.
What is Phospholipid bilayer?Phospholipids, which are made up mostly of fatty acids and alcohol, make up the majority of the cell membrane. A phospholipid bilayer is the name given to the two layers of phospholipids that make up the cell membrane.
A phospholipid molecule has two tails and a head. The tails "detest" water, while the head "loves" it (hydrophilic) (hydrophobic). The water-loving heads point either toward the cytoplasm or the fluid surrounding the cell, while the water-hating tails are on the exterior of the membrane.
If the hydrophobic molecules are small enough, they can readily flow through the cell membrane as the inside of the membrane also despises water. Steroids and small lipids are hydrophobic and easily pass through the membrane.
Therefore, The phospholipid bilayer is made of two parts, the head and tail. The head is hydrophilic whereas the tail is hydrophobic.
To learn more about hydrophobic molecules, refer to the link:
https://brainly.com/question/1407181
#SPJ5
I need help please :/
Answers
Answer: By looking at the graph I can determine that the answer must be D.
Explanation: Think about it if the question is asking you to look at the graph and determine the capacity then we know that they are asking for the area with the most salmon which so happens to be area A. All in all, the answer must be D.
Where do rivers usually begin?
O at the ocean
O at groundwater outlets
O in mountainous regions
O in lakes and larger rivers
Answers
Answer:
Where do rivers usually begin?
C:
in mountainous regions
Explanation:
Elementary my dear Watson, elementary.
Answer:
Where do rivers usually begin?
C
in mountainous regions
Which statement best describes a benefit of conducting a comparative investigation over collecting data from the Internet?
1 A comparative investigation can be repeated in a short time while collecting the continuous data from the Internet takes longer.
2Conducting a comparative investigation is always less expensive than an investigation in which data is obtained from the Internet.
3 Conducting a comparative investigation is always less time consuming than obtaining data from the Internet.
4 A comparative investigation can provide a wider range of data than can be obtained from the Internet.
Answers
Answer:
The correct option is 4
Explanation:
Comparative investigation involves the collection of data from different "subjects" (including organisms, object or characteristics) or obtaining data under different conditions (such as seasons, years or locations) for the purpose of comparison. This type of investigation is both time and capital intensive; meaning it requires a lot of time and money. It however provides a larger and wider range of data that might not be available through other "independent investigations" because a large amount of subjects is usually studied for proper and accurate comparisons.
Answer:
D- A comparative investigation can provide a wider range of data than can be obtained from the Internet.
Explanation:
I did the ed and put b cuz other questions said they were right (DON'T TRUST EM
_______carries oxygen, bound to hemoglobin, to deliver to the tissues. This is an anucleate cell type.
_______ important in the process of blood clotting. Generated from the megakaryocyte.
_______short-lived, phagocytic cell that is quick to respond to pathogen infection. Most abundant of the leukocytes.
_______used in the immune response, as either B- or T-cells.
_______wandering blood cell. Largest of the leukocytes.
_______phagocytic cell that engulfs antibody-covered pathogens; an acidic granulocyte with bi-lobed nucleus.
_______ releases histamine and heparin. Least abundant leukocyte.
Answers
Red blood cell (or erythrocyte): carries oxygen, bound to hemoglobin, to deliver to the tissues. This is an anucleate cell type.
Platelet (or thrombocyte): important in the process of blood clotting. Generated from the megakaryocyte.
Neutrophil: short-lived, phagocytic cell that is quick to respond to pathogen infection. Most abundant of the leukocytes.
Lymphocyte: used in the immune response, as either B- or T-cells.
Monocyte: wandering blood cell. Largest of the leukocytes.
Eosinophil: phagocytic cell that engulfs antibody-covered pathogens; an acidic granulocyte with bi-lobed nucleus.
Basophil: releases histamine and heparin. Least abundant leukocyte.