Answer:
b
Explanation:
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NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
C- Na Al wouldnt make sense so it would be either mg or Na but Na has only one electron
11) What is the relationship between temperature and the speed of sound? Include the concept of molecule
vibration in your explanation.
Answer:
Temperature is another condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy and can vibrate faster and allow sound waves to travel more quickly. The speed of sound at room temperature air is 346 meters per second.
An example of a small region that geographers might study is Chinatown
in San Francisco.
Answer: san francisco
Explanation:
Is diphenylmenthane a solid or liquid at room temperature
Answer:
diphenylmethane is liquid at room temperature.
Explanation:
It is a solid below room temperature and its melting point is at 22 degree celsius to 24 Celsius degree celsius.
Diphenylmethane is a solid at room temperature. Diphenylmethane is a non-polar compound.
Diphenylmethane is a colorless, crystalline solid with a melting point of 53 °C. It is a member of the diphenylmethanes, which are a class of organic compounds that contain two benzene rings joined by a single carbon-carbon bond.
Diphenylmethane is a non-polar compound, which means that it does not have any permanent dipole moments. This makes it difficult for the molecules of diphenylmethane to interact with each other, which is why it is a solid at room temperature.
If diphenylmethane were a polar compound, the molecules would be able to interact with each other through dipole-dipole interactions. This would make the compound more likely to be a liquid at room temperature.
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Define the following:
A. Passive tranaport
B. Diffusion
C. Osmosis
D. Facilitated Diffusion
E. Active tranaport
F. Selectively permeable
G. Cellular respiration
Answer:
A. Passive Transport is migration of a molecule from one side of the cell membrane to the other, from an area of high electrochemical potential to a region of lower electrochemical potential.
B. Diffusion is an individual molecule of a material moving from a high-concentration location to a low-concentration area over a semipermeable barrier
C. Osmosis is the movement of molecules of water through a cell's partly permeable membrane from a liquid with a large concentration of water molecules to a solution with a lower concentration of water molecules.
D. Facilitated Diffusion are molecules that diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.
E. Active transport is the transport of molecules across a cell membrane against a concentration gradient from a low-concentration region to a high-concentration region.
F. Selectively permeable is when some chemicals or ions pass across the membrane, while others are blocked.
G. Cellular respiration are organisms mix oxygen with food molecules, directing the chemical energy in these substances into life-sustaining processes while eliminating carbon dioxide and water as waste material.
Explanation:
Please help one of my friends is trying to be cool but I'm scared that they could get really hurt!
can your skin get burnt if you light hand sanitizer on fire on your skin!
Answer:
The answer is :No It won't burn.
what kind of state is a roller coasters are the best use of Newton's laws of motion
I am slightly unsure on the question, but if you are asking what kind of "statement" is "roller coasters are the best use of Newton's laws of motion" then the following should answer your question:
Answer:
An opinion.
Explanation:
In physics, Sir Isaac Newton's first law of motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.
The statement, "Roller coasters are the best use of Newton's laws of motions" is an opinion because it is not based on any evidence, facts, or proof to back it up.
For the following reaction: S (s) + O2 (g) =SO2 (g) Elthalpy Change= -297kj/mol (a) Is this reaction exothermic or endothermic? (b) How does the heat content of 1 mole of SO2 compares to that of 1 mole of S plus 1 mole of O2?
Answer:
a) exothermic
b) the amonut of oxygen in one mole of oxygen is the same as that in 1 mole of sulphur dioxide
Describe Bohr's atomic model
Answer:THE Bohr's atomic model is an atom as a smal, positively charged nucleus surrounded by electrons . have a good day
All objects emit and absorb electromagnetic radiation.
Group of answer choices
True
False
QUICK QUESTION: why is there 2 hydrogen in the periodic table? I noticed that there’s one hydrogen in group 1 and another in group 17.
Answer:
one is H and the other is HE
Explanation:
H (in group one) stands for Hydrogen, as for He (group 18) stands for Helium
How does nitrogen return to the soil?
photosynthesis by plants
absorption by the soil
precipitation by rain
decomposition by bacteria
Answer:
photosynthesis by plant
Explanation:
when plants like lugumes are in a process of fertilization,the suck the nutrugen from the air with help from their Noddles found on their roots.
Answer:
decomposition by bacteria
Explanation:
If an airplane has parts that function like
a person's parts, then what part of the body does the pilot represent?
Explain your reasoning.
Answer:
Obtaining a Medical Certificate. Most pilots must have a valid medical certificate to exercise the privileges of their airman certificates. Glider and free.
Explanation:
Aviation safety relies heavily on maintenance. When it is not done correctly, it contributes to a significant proportion of aviation accidents and incidents. Some examples of maintenance errors are parts installed incorrectly, missing parts, and necessary checks not being performed.
Two raw materials used in the manufacture of polythene
crude oil and natural gas
Which of these human activities is most likely to cause the excessive growth of Phytoplankton in the world’s oceans? Choose the best 2 answers.
The use of chemical fertilizers that are carried by runoff into rivers
The use of chemical fertilizers that are carried by runoff into rivers
The mining of fossil fuels, which requires digging underground tunnels
The mining of fossil fuels, which requires digging underground tunnels
The spraying of chemical herbicides that reduce carbon dioxide in the air
The spraying of chemical herbicides that reduce carbon dioxide in the air
The logging of old-growth forests, which results in erosion
The logging of old-growth forests, which results in erosion
Using fertilizers on your lawns
Answer:
The use of chemical fertilizers that are carried by runoff into rivers
The use of chemical fertilizers that are carried by runoff into rivers
what is the charge of the cadmium cation
Answer:
In its compounds cadmium exhibits almost exclusively the +2 oxidation state, as in the colourless Cd2+ ion, which forms a number of stable complex ions, especially halide complexes.
Explanation:
A skateboarder is going down a ramp. Which statements about the energy of the skateboarder are correct
I couldnt see any choices but if any of the awnsers mention the skateborder having pontential energy turning into kinetic energy that one would be right
Multicellular plants and animals have organs with specific functions.
Which structures do eukaryotic cells have for performing specific functions? ASAP!! PEOPLE! PLZ
Answer:
Organelles.
An organelle in a cell is sometimes compared to an organ or organs in organisms.
Change Worksheet
answer the following questions.
The graph was drawn from data collected as a substance was heated at a constant rate. Use the graph to
180
160
Phase Change Diagrarn
140
120
Temperature (°C)
100
D
B
स
80
60
40
2
4
6
8
16
18
20
22
10 12 14
Tim e (minutes)
At point A, the beginning of observations, the substance exists in a solid state. Material in this phase has
Deontz_ volume and __ha2_shape. With each passing minute,
is added to the
substance. This causes the molecules of the substance to me more rapidly which we detect by a
t2 Maturise in the substance. At point B, the temperature of the substance is __°C. The solid
begins to_A
At point C, the substance is completely or in a mate state.
Material in this phase has_Det volume and
shape. The energy put to the substance
between minutes 5 and 9 was used to convert the substance from a 3D
This heat energy is called the latent heat of fusion. (An interesting fact.)
to a
to a
Between 9 and 13 minutes, the added energy increases the du of the substance. During the
time from point D to point E, the liquid is
By point E, the substance is completely in the
phase. Material in this phase has
volume and
shape. The energy put to the substance between minutes 13 and 18 converted the substance from a
state. This heat energy is called the latent heat of vaporization. (An
interesting fact.) Beyond point E, the substance is still in the
phase, but the molecules
are moving
as indicated by
the increasing temperature,
Substance Melting point Boiling point
Bolognium
20°C
100 °C
Which of these three substances was likely used in this
Unobtainium
40°C
140 °C
phase change experiment?
Foosium
70 °C
140°C
ONUS: For water, the value for the latent heat of vaporization is 6.8 times greater than the latent heat of fusion. Imagine we were
ding heat at a constant rate to a block of ice in a beaker on a hot plate, and it took 4 minutes for the ice to melt completely. How
uld it take, after the water started boiling, for the beaker to be completely empty (the liquid water totally converted to water van
Draw diagrams to show the arrangement of particles in a
Salid a liquid, and a gas
Answer:
solid(particles are rightly packed)
liquid(particles are losely packed)
gas(particles move freely)
Explanation:
there u go, hope it helps
1. New ground begins as barren rock. This rock is covered in lichens, mosses, and ferns. Eventually soil forms. This is the beginning of which process?
Aquatic Succession C Primary Succession
B Secondary Succession D Eutrophication
Answer: ion no cant cap
Explanation:
HELP ILL MARK YOU BRAINLIEST
When compared to the standard hydrogen electrode, zinc has a reduction potential of -0.762 volts and copper a reduction potential of + 0.342 volts. What is the reduction potential when zinc and copper are connected to one another?
+0.420 volts
-0.420 volts
+1.104 volts
-1.104 volts
Answer:
I'll already answered that
Explanation:
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PLZ SOMEONE HELP ASAP!!!! PICTURE IS ABOVE! I WILL GIVE BRANLIEST!!!!
Examine the molecules below.
Circle the molecules that can also be classified as compounds.
Answer:
the last one is an element rest all are compounds
Explanation:
compounds are 2 or more different atoms that are joined chemically in a fixed proportion
hope it helps : )
the two main division of solid structures are crystalline and what?
Answer:There are two main categories of solids—crystalline solids and amorphous solids. Crystalline solids are those in which the atoms, ions, or molecules that make up the solid exist in a regular, well-defined arrangement.
Explanation:
brainliest pls
2HCI total bond energy
Answer:
It's the oxygen + hydrogemity =the 2 +2=4 but the 4 is a oxygen so its 5
What are three ways fluid flow is important in the food industry?
what is this reaction
CaCO3 (s) → CaO (s) + CO2 (g)
Oil is less dense than water. What happens when you mix the two liquids together?
(A) Oil sinks to the bottom of the container.
(B) The two become one smooth mixture.
(C) The oil floats on top of the water.
(D) The water turns to gas inside the oil.
Answer:
(C) The oil floats on top of the water
Explanation:
If an object/substance is less dense than water it will float on the water.
If an object/substance has the same density as water it will stay submerged in the water, but will not sink to bottom.
If an object/substance is more dense than the water it will sink to the bottom.
why do atoms emit light energy according to the bohr model?
Answer: According to the Bohr model, atoms emit light because excited electrons are returning to lower energy states, emitting the energy difference. This energy always has a specific wavelength because the electrons can only exist in set orbits. ... An emission spectrum is the frequencies of light emitted from an atom.
Explanation:
Atoms emit light energy because electrons transit between energy levels by absorbing energy and relaxing by emission of radiation.
What is Bohr's model of atom?According to Bohr model of atom the electrons are revolving around the nucleus through the circular paths of fixed energies. These circular paths are called orbits.
Using this model the momentum and velocity of an electron and the atomic radius can be determined. Bohr, states the electrons are able to transit between these energy level and the energy difference between the two energy levels will be equal to the energy of a photo absorbed by the atom.
Electrons excite to higher energy level by by absorbing energy and they cant stay there for long while and relax back to the ground state by emitting a the radiation which is complementary wavelength to the absorbed one. That's why the atoms emit light.
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If a material is at. the particles in the material are not moving and do not have kinetic energy.
Answer:
Equilibrium
Explanation:
Definition: "A particle is in equilibrium provided it is at rest if originally at rest or has a constant velocity if originally in motion. Most often, static equilibrium is used to describe an object at rest"