Answer:
1000 gram
Explanation:
because mass is constant everywhere
If Mr. Murchison is testing out how the light in his classroom affects how sleepy his students get, what should his dependent variable be?
Answer:the dimmer the light is,the more sleepy the students become
Explanation:
dimensional analysis 9 lemons = 1 orange How many lemons in 10 oranges?
Please help me answerrr
Answer:
0.00439 g/mL
Explanation:
plz mark as brainliest if it helps.
Harvey mixes two liquids. Which observation of the new mixture most likely indicates a precipitate is O A. a cloudy appearance OB. a bubble formation OC. a change in color O D. a change in odor
Answer:
A cloudy appearance!!
Explanation:
Hope it helps, just took a quiz.
Answer:
a cloudy appearance
Explanation:
i have big brain
Which is an example of what should be done in case of a laboratory accident? Wear appropriate lab attire. Read directions completely. Do not try to clean up a spill. Remain in the area.
Answer: C. Do not try to clean up a spill.
Explanation:
Question
The measure of molecular movement is known as
dew point
temperature
condensation
evaporation
What makes one atom different from another? The number of______in the_____
Answer:
protons in the nucleus
6.
Which best represents a particle containing 28 protons, 26 electrons, and 34 neutrons?
A Fe2-
B
54
2+
28N;
C%2Fe2-
DSNi2+
Answer:
Ni^2+
Explanation:
The following data were obtained from the question:
Proton = 28
Electron = 26
Neutron = 34
Next, we shall determine the atomic number of the element.
Atomic number of an element is simply defined as the number of protons in the atom of an element.
Thus,
Atomic number = proton number
Proton = 28
Atomic number = proton number = 28
Atomic number = 28
Therefore, the element is Nickel since no two elements have the same atomic number.
Finally, we shall determine the charge on the Nickel atom as follow:
Proton = 28
Electron = 26
Charge on atom =
Charge on atom = Proton – Electron
Charge on atom = 28 – 26
Charge on atom = +2
Therefore, we can represent the Particle as Ni^2+
TIME REMAINING
01:29:12
Which technology has helped improve scientists' ability to gather scientific data about the movement of sea turtles?
O satellite tracking
O thermometers
O probeware
microscopes
the first one satellite tracking
Answer:
I believe the answer is A. Or the 1st dot.
Explanation:
Which of these would have lowest kinetic energy
Boiling water
Ice water
Refrigerated water
Water at room temperature
Answer:
The answer is ice water, since the particles of a solid have very low kinetic energy.
Explanation:
Answer:
Iced water.
Explanation:
It's a solid. Within a given substance, such as water, particles in the solid state have the least amount of kinetic energy.
As water freezes, it does so because after thermal energy leaves the particles, the average translational+rotational kinetic energy decreases, but the total average kinetic energy does not... and the temperature does not change either.
Gases deviate from tidal gas behavior because their particles:
Answer:
Explanation:
At low temperatures or high pressures, real gases deviate significantly from ideal gas behavior.
The kinetic theory assumes that gas particles occupy a negligible fraction of the total volume of the gas. It also assumes that the force of attraction between gas molecules is zero.
I hoped I helped you! :)
As a star uses up its hydrogen supply, it changes from a main sequence star to a -
A.) dwarf
B.) supernova
C.) black hole
D.) giant
As a star uses up its hydrogen supply, it changes from the main sequence star to a Giant. Thus, the correct option for this question is D.
What is a Star?A star may be defined as a type of huge celestial body that is generally constructed of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores. They are the luminous bodies that are visible in the sky at night.
A giant is a type of star that has utilized its hydrogen supply in its cores and transformed itself into the thermonuclear fusion of hydrogen in the shell that envelops its surroundings.
This creates an outwards force and stimulates fusion that initiates to increase and hence the star can not able to maintain its equilibrium longer.
Therefore, as a star uses up its hydrogen supply, it changes from the main sequence star to a Giant. Thus, the correct option for this question is D.
To learn more about Red giant, refer to the link:
https://brainly.com/question/27111741
#SPJ6
For the following situations, describe the contact and non contact forces that are involved.
A. A book sitting on a shelf
B. A soccer player kicking a ball; the ball soaring through the air and landing on the ground
C. A hiker in the woods reading her compass to determine which direction to go
D. A child on a sled; first, the child is sitting at the top of the hill, waiting his turn; then, the child pushes off and slides down the hill, eventually coming to a ston
Answer:
D
Explanation:
Bc I got it right
Answer:
For A: the contact I think would be the bookshelf holding it up the non-contact force would be gravity making it so the book would stay where it was put.
For B: the contact force would be the ball being kicked and the non-contact would be the gravity pulling it back to the ground.
For C: A hiker in the woods reading her compass to determine which direction to go The contact would be her holding the compass and moving around the non-contact would be the compass arrow turning every time she moves.
For D: The child on a sled for the contact force would be the person pushing the little kid down the hill the non-contact force would be the gravity that would be keeping the kid going down the hill and gravity stopping the kid at the bottom of the hill.
Explanation:
Have the same assignment and these are the answers I gave. Hope this helps someone!
Carmen has a sample of matter. It is clear and smells sour. The sample is also thick but it flows when poured. Which is the best conclusion about Carmen's sample?
Answer:
liquid
Explanation:
In the given context, the sample as collected by Carmen is clear and the sample has a sour smell. It is also mentioned that the sample is thick sample and when the sample is poured on a surface it begins to flow.
Such a sample would be a liquid sample because anything that flows is a liquid. The liquid sample has a high viscosity since it is thick.
Answer:liquid
Explanation:
Because it flows
1. The term _________
refers to the chemical potential of hydrogen.
Answer:
PH
Explanation:
Answer:
Explanation:
pH but i'm really not sure
1. Identify the layer of Earth that is made primarily of silicon and oxygen.
Crust
Mantle
Core
Answer:The crust
Explanation:
What are the Oxidation numbers for H2AsO4-
i cant understand your question define briefly
What substance is produce when hydrogen burn?...
Answer:
Water
Explanation:
hydrogen + oxygen = water
Which of the following is true about matter?
Answer:
Full question plssssss what should we find
Scientists are studying cell-to-cell communication in a human spleen.
How would scientists most likely use technology during this study?
to draw a diagram showing how cellular communication occurs
to predict what triggers cells-to-cell communication
to determine safety procedures to be used in the laboratory
to determine the number of visible cells by counting them
Answer:
To predict what triggers cell-to-cell communication
Explanation:
Methodologies used for studying cell-to-cell communication includes
1) The reductionist method in which cellular response are measured based on testing specific cellular signals by the introduction of different chemicals, so as to find the source that triggers the response
2) By the application of known chemical reagents enable or block specific areas of an organism's receptors and with the aid of an electrode measure the cellular response based on generated currents of ions or by collecting and analyzing fluid samples from the affected area.
Answer:
b
Explanation:
just took test
What are some ways each person could reduce air pollution and energy consumption? a. adjust the temperature settings - hotter in winter and cooler in summer b. adjust the temperature settings - cooler in winter and hotter in summer c. cut down trees near the house d. replace plumbing fixtures that leak Please select the best answer from the choices provided A B C D
Answer:
b.
adjust the temperature settings - cooler in winter and hotter in summer
Explanation: I took the quiz
Answer:
B. adjust the temperature settings- cooler in winter and hotter in summer
Explanation:
edge 2020
The second part of the cell theory is that he cell is the smallest unit of _______ and _______ in living things
Answer:
a.life
b.organization
True or False? Nitrogen can get back into the atmosphere when dead plants and animals are decomposed by bacteria. The bacteria break down the larger molecules into smaller ones including nitrates, ammonia, and ultimately N2. True or Fralse
Answer: True
Explanation:
Answer:
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Explain what you think a compound is
Answer:
a thing that is composed of two or more separate elements; a mixture.
Explanation:
A single paper clip weighs about one gram. So 10 paper clips would weigh?
Compare which element would have larger first ionization energy: an alkali metal in Period 2 or an alkali metal in Period 4?
AW: I think it would be alkali metal on period 2
Answer:
An alkali metal present in period 2 have larger first ionization energy.
Explanation:
Ionization energy:
The amount of energy required to remove the electron from the atom is called ionization energy.
Trend along period:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus. Thus alkali metal present in period 2 have larger ionization energy because of more nuclear attraction as compared to the alkali metal present in period 4.
A hydrogen electron is elevated from level 1 to level 2. Another electron is elevated from level 2 to level 4. The transition requiring the greatest energy change is
Answer:
the answer is level 2 to level 4
Explanation:
C. A paramecium is a single-celled organism that lives in ponds. It travels at a rate of 2,000 micrometers per second. What is the speed of the paramecium in meters per hour?
Answer:
7.2 meters per hour
Explanation:
It is given that,
The speed of a paramecium is 2,000 micrometers per second.
We need to find the speed of the paramecium in meters per hour.
We know that,
[tex]1\ \mu m=10^{-6}\ m[/tex]
and
1 hour = 3600 seconds
[tex]v=2000\ \dfrac{\mu m}{s}\\\\=2000\times \dfrac{10^{-6}\ m}{(\dfrac{1}{3600})\ s}\\\\=7.2\ \text{meters/hour}[/tex]
Hence, the speed of the paramecium is 7.2 meters per hour.
The results of an investigation are the
(Blank)
Answer: ending results
Explanation:
Which of the following is NOT a subatomic particle of an atom?
Neutron
Nuclear wall
Proton
Electron
Answer:
B
Explanation:
It is Nuclear wall which is the second one