Answer:
because time do not depend on direction. actually time is fake.nobody can stop it neither disturb it.it is in my view.
What are the atomic numbers for sodium,iron and sulfur???
Answer: sodium-11 iron-26 sulfur-16
Explanation:
Answer:
sodium:11
iron:26
sulfur:16
Explanation:
pls..give..brainlist...to the..above..person..thx..u
CH4 + O2 = H2O + CO2, turn this into a balanced equation and show work.
Answer:
CH4 + 2O2 = 2H2O + CO2
Select the correct answer.
Which substance is most likely to form in a precipitation reaction?
A.
calcium nitrate
B.
copper(I) nitrate
C.
iron(I) chloride
D.
iron(II) sulfide
E.
potassium sulfate
Answer:
C.
Explanation:
Iron is most likely to form a precipitation reaction.
What was important about the Hydrogen bright line emission spectrum?
Answer:
The emission spectrum lines are the changes in the quantum energy levels of the single electron in the Hydrogen atom.
Explanation:
Electrons move around the hydrogen atom in electron waves patterns. These waves occur in distinct quantum energy levels.
The change from one quantum energy level to another energy level has a definite energy level change. There is a wave length associated with each change in energy levels. These wave lengths have a color associated with them.
Low energy level changes have long wave lengths associated with them giving red and orange colors.
High energy level changes have short wave lengths associated with them giving blue and violet colors.
Note each atom has a unique emission spectrum associated with the energy levels and electron structure of the atom. Helium was first discovered by looking at its emission spectrum as seen in the sun.
Explanation:
if a piece of aluminum has a density of 2.7g/cm^3. the mass of 5.2g,what is the volume
Answer:
Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3. Aluminium has a density of 2.7 grams per cubic centimeter, that is, 2.7 g/cm3 or 2.7 g cm-3.
Explanation:
Answer:2.7 g cm-3.
Explanation:Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3. Aluminium has a density of 2.7 grams per cubic centimeter, that is, 2.7 g/cm3 or 2.7 g cm-3.
What role does energy play in sound? Pls help this is due today
A. Sound waves have nothing to do with energy.
B. Sound waves carry energy.
C. Energy is present in loud sounds only.
D. Energy is present in high-pitched sounds but not in low-pitched sounds.
Answer:
pretty sure it is letter B
Answer:
B
Explanation:
How many reactants are there in a single replacement reaction?
Answer:
One reactant
Explanation:
Use what you know about the orbits of Earth and the moon to sort the phrases into the correct Category.
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Astrophysics.
Let's categorize them eventually ==>
1.) Earth ==> 1.) travels around the Sun
2.) takes 365.25 days .
2.) Moon ===> 1.) travels around the Earth
2.) Takes 27.3 days.
When scientist want to measure the brightness of a star while considering the distance from the observer what are they going to
measure?
O Absolute brightness
O Apparent brightness
O Absolute magnitude
O Apparent magnitude
Answer:
apparent brightness
Explanation:
thats it not sure buttt
Answer:
This wide-field view of the sky around the bright star Alpha Centauri was created from photographic images forming part of the Digitized Sky Survey 2. The star appears so big just because of the scattering of light by the telescope's optics as well as in the photographic emulsion. Alpha Centauri is the closest star system to the Solar System. Image released Oct. 17, 2012. (Image credit: ESO/Digitized Sky Survey 2)
A glance at the night sky above Earth shows that some stars are much brighter than others. However, the brightness of a star depends on its composition and how far it is from the planet.
Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs. (A light-year is the distance light travels in one year — about 6 trillion miles, or 10 trillion kilometers.) Astronomers also measure luminosity — the amount of energy (light) that a star emits from its surface.
Measuring star brightness is an ancient idea, but today astronomers use more precise tools to obtain the calculation.

From Greek to modern times
More than 2,000 years ago, the Greek astronomer Hipparchus was the first to make a catalog of stars according to their brightness, according to Dave Rothstein, who participated in Cornell University's "Ask An Astronomer" website in 2003.
"Basically, he looked at the stars in the sky and classified them by how bright they appear — the brightest stars were 'magnitude 1,' the next brightest were 'magnitude 2,' etc., down to 'magnitude 6,' which were the faintest stars he could see," Rothstein wrote.
Human eyes, however, are not very discerning. Large differences in brightness actually appear much smaller using this scale, Rothstein said. Light-sensitive charged-coupled devices (CCDs) inside digital cameras measure the amount of light coming from stars, and can provide a more precise definition of brightness.
Using this scale, astronomers now define five magnitudes' difference as having a brightness ratio of 100. Vega was used as the reference star for the scale. Initially it had a magnitude of 0, but more precise instrumentation changed that to 0.3.
Orion is the brightest and most beautiful of the winter constellations. Some of its stars, including Betelgeuse and Rigel, are among the brightest stars. (Image credit: Starry Night Software)
Apparent magnitude vs. absolute magnitude

When taking Earth as a reference point, however, the scale of magnitude fails to account for the true differences in brightness between stars. The apparent brightness, or apparent magnitude, depends on the location of the observer. Different observers will come up with a different measurement, depending on their locations and distance from the star. Stars that are closer to Earth, but fainter, could appear brighter than far more luminous ones that are far away.
"It is the 'true' brightness — with the distance dependence factored out — that is of most interest to us as astronomers," stated an online course on astronomy from the University of Tennessee.
"Therefore, it is useful to establish a convention whereby we can compare two stars on the same footing, without variations in brightness due to differing distances complicating the issue."
Explanation:
HOPE IT HELPS
advantages of artificial fertilizers?
Answer:
they improve soil texture
Explanation:
that's it helps to hold
water longer and and increase the soil bacteria and fungal activity in the soil so they do not only assist your plants , they help the soil.
10pts! Will give brainllest if you are right! Please come quicklyyyy!
How are speed and velocity related?
A. they're exactly the same
B. velocity = speed and direction
C. speed = velocity and direction
D. direction = speed and velocity
Answer:
Hey there :))
Speed and Velocity are related in a lot of ways distance and displacement are. Speed is a scalar and velocity is a vector. They both represent a way to measure the change in position of an object relative to time.
I need help I really confused it doesn’t make any sense to me
Answer:
i would say shape because the other answers do not logically compute. A is a transformation from solids to liquids or vice versa what B is and C IS THE ANSWER because the only action that is occurring is the tearing of the previous shape of the paper.
Explanation:
HELP FAST!
This food chain is one part of a ____ within an ecosystem.
A)
biome
B)
community
C)
population
D)
species
Answer:
Species
Explanation:
i hate chemistry sm pls help
What is changes in a chemical reaction
give full experimental details of how you would prepare a aluminum chloride from aluminum
Answer:
hello hello hello hello hello hello hello
How many molecules are in 48.0 grams of NaOH?
Determine the number of particles present in 8.6 moles of Aluminum
Answer:
5,18*10^{24}
Explanation:
N=n*Na
N=8.6*6.02*10^{23}
N=5,18*10^{24}
between vertebrae
2-The backbone contains.......
c. joints
b. tendons
a. cartilages
How did life evolve from nonliving matter?
hiii please help i’ll give brainliest
Answer:
C option
Explanation:
A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C.
Solve the problem for the pressure of oxygen.
in kPa plz
Answer:
The pressure of gas in kilopascals is 55.9
Explanation:
variables given :
volume
temperature
moles
unknown variables :
pressure
Select the correct algebraic form for the equation to be used for this calculation.
p= nRT/V
Solve the problem for the pressure of oxygen.
Answer:
55.9 kPaExplain how cells are organized within a multicellular organisms
Answer:
For any multicellular organism to survive, different cells must work together. The right type of cell must be in the right place to do the work that needs to be done. Organization starts with the cell. Cells in multicellular organisms are specialized for a specific function.
Explanation:
Answer:
Cells in multicellular organisms are organised into tissues and tissues are organised into organs, organs are organised into organ system, and finally, organ systems are organised into an organism
Which will not appear in the equilibrium constant expression for the reaction below?
H.O(g) + C(s) >H(g) + CO(9)
[H2O]
[C]
[Ha]
[CO]
Answer:
[C]
General Formulas and Concepts:
Chemistry
Kinetics
Rate LawsEquilibrium
Equilibrium ExpressionsExplanation:
Equilibrium Expressions are only written for either aqueous solutions or gases. Solids and liquids are negligible for equilibrium. Our equilibrium constant expression would be [tex]\displaystyle K = \frac{[CO][H]}{[H_2O]}[/tex].
∴ Carbon C (s) is not included in the expression and is our answer.
Can somebody sort these from non-metals to metals?
Sonorous, low melting point, high density, brittle, dull, malleable, basic oxide
what family and group nitrogen and phosphorus in?? I know they are both non-metals, just want to know the name, thanks
Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc).
They are also known as reactive metals !
A larger bullet does not necessarily have more momentum than a smaller bullet Explain why
Answer:
yes
Explanation:
a larger bullet weighs more then a smaller bullet so the smaller bullet goes faster.
Answer:
Explanation:
Momentum is dependent on mass and velocity. So, the smaller bullet can be moving at a much greater speed than the larger one.
How much energy is needed to heat 9.3 grams of silver metal from 21 °C to 52 °C, if the
specific heat of silver metal is 0.240 J/g °C?
Question 5
4 pts
How much heat must be added if 160 grams of water is heated from 24 °C to 85 °C?
(The specific heat of water is 4.184 J/g °C)
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
question 4. 69.19J
question 5. 40835.84J
Explanation:
question4.
heat needed = mass × specific heat capacity × change in temperature
= 9.3× 0.240×(52-21)
=69.192J
question 5.
heat added = 160× 4.184×(85-24)
= 40835.84J
What is the result of the following calculation? Record to the correct number of significant figures.
7.830 g x 1.041 = ?
Answer:
8.15103
g
x
Explanation:
A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?
Answer:
c6h6
Explanation: