Why do you see different stars in spring’s night sky than in fall’s night sky? Explain.

Answers

Answer 1

Answer:

If observed through the year, the constellations shift gradually to the west. This is caused by Earth's orbit around our Sun. In the summer, viewers are looking in a different direction in space at night than they are during the winter.

Explanation:

Answer 2

Answer:

there it the fact that the earthisspinningand so the starsare staying still and we are spinning


Related Questions

How many moles are in 1.23 X 1050 atoms of calcium carbonate, CaCO3?

Answers

Answer:

Explanation:1 mole is equal to 1 moles CaCO3, or 100.0869 grams.

Which of the following is the correct electron dot structure for a hydroxide ion?

Answers

Answer:

A

Explanation:

A hydroxide ion is given as:

       OH⁻

The electron dot notation shows only the chemical symbol of the element surrounded by dots to represent the valence electrons. The chemical symbol denotes the nucleus and all electrons except the valence electrons.

The dots are arranged on the four sides in pairs.

Oxygen is made up of 6 valence electrons, and since the ion has a net negative charge, the hydrogen and oxygen achieved their stable configuration this way.

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over
the next few minutes?
O Molecules in both the metal and the surrounding air will start moving at lower speeds.
O Molecules in both the metal and the surrounding air will start moving at higher speeds.
O The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
O The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Answers

Answer:

It would be the third answer.

Explanation:

This is because over the next few minutes, the heat would radiate away from the atoms in the metal plate and the atoms around the plate would absorb this radiation.

A mixture contains 21.7 g NaCI, 3.74 g KCI, and 9.76 g Lici. What is the mole fraction of NaCl in this mixture?

Molar mass
NaCl: 58.44g/mol
KCl: 74.55g/mol
LiCl: 42.39g/mol​

Answers

Answer:Mole Fraction of NaCl=0.5697

Explanation:

No OF Moles of NaCl=  Mass / Molar mass

=21.7 g/58.44g/mol

=0.371moles

No OF Moles of KCl=  Mass / Molar mass

=3.74g/74.55g/mol

=0.0502moles

No OF Moles of LiCl=  Mass / Molar mass

=9.76 g/42.39g/mol

=0.230moles

Mole Fraction of NaCL = Moles of NaCL/ Total number of moles of the mixture

=0.371/( 0.371+ 0.0502+0.230)

0.371/0.6512

=0.5697

Answer:

Mole fraction: 0.570

Explanation:

Mole fraction is defined as the ratio of moles of a compound in a mixture over the total moles of the mixture. To solve this problem, we need to find moles of the 3 salts:

Moles NaCl -Molar mass: 58.44g/mol-:

21.7g NaCl * (1mol / 58.44g) = 0.3713 moles

Moles KCl -Molar mass: 74.55g/mol-:

3.74g KCl * (1mol / 74.55g) = 0.0502 moles

Moles LiCl -Molar mass: 42.394g/mol-:

9.76g LiCl * (1mol / 42.394g) = 0.2302 moles

Mole fraction NaCl:

0.3713mol / (0.3713mol + 0.0502mol + 0.2302mol) =

0.570

Q. Explain why is sulfuric acid a corrosive?
.
.
.
.
.
.
Can we clean a dumb humans brain with windex?if yes then tell me how?

Answers

Answer: yes

Explanation:   cut open their head and spray their head with windex. THAT SIMPLE

how many protons does Beryllium have?

Answers

Beryllium has approximately 4 protons

Answer:

4

Explanation:

its a rare element, usually occurring as a product of the spallation of larger nuclei that have collided with cosmic rays

What goes in cellular respiration and what comes out of cellular respiration?

Answers

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

If there are 400 radioactive atoms in a sample, how many will remain after four half-lives have passed?
Enter the exact number as your answer. Do not spell out the number.

Answers

Answer:

25 atoms

Explanation:

Given data:

Total number of atoms = 400 atom

Atoms remain after 4 half lives passed = ?

Solution:

At time zero = 400 atom

At first half life = 400 atom/2 = 200 atom

At 2nd half life = 200 atom/2 = 100 atom

At 3rd half life = 100 atom/2 = 50 atom

At 4th half life = 50 atom/2 = 25 atom

Thus, 25 atoms are remained after 4 half lives.

25 atoms of the radioactive atoms will remain after 4 half lives.

    Given in the question,

Initial amount of a radioactive element = 400 atomsNumber of half lives = 4

Expression for the amount remaining of a radioactive element after 'n' half lives is given by,

[tex]N=N_0(\frac{1}{2})^n[/tex]

Here, [tex]N_0=[/tex] Initial amount

[tex]n=[/tex] Number of half lives

By substituting the vales of [tex]N_0[/tex] and [tex]n[/tex] in the question,

[tex]N=400(\frac{1}{2})^4[/tex]

   [tex]=\frac{400}{16}[/tex]

   [tex]=25[/tex]

        Therefore, 25 atoms of the radioactive atoms will remain after 4 half lives.

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Ca(C2H302)2
Name the following compounds.

Answers

Answer:

nut

Explanation:

Ca(C2H302)2 is called calcium acetate

how many atoms are there in 8.08 moles of carbon dioxide

Answers

Answer:

145.97×10²³ atoms

Explanation:

Given data:

Number of moles of CO₂ = 8.08 mol

Number of atoms of CO₂ = ?

Solution:

1 mole of CO₂ contain 1 mole C atom.

8.08 mole contain 8.08× 1 = 8.08 mole of C atom.

1 mole of CO₂ contain 2 moles of O atom.

8.08mole contain 8.08×2 = 16.16 mole of O atom.

Total number of moles of atoms = 8.08 mole + 16.16 mole

Total number of moles of atoms = 24.24 mol

Number of atoms of CO₂:

1 mole of any substance contain 6.022×10²³ atoms.

24.24 mol ×6.022×10²³ atoms / 1 mol

145.97×10²³ atoms

Consider the reaction
H,01) +energy > H2(g) +%02(g)
Which of the following phrases best describes this reaction?
A Endothermic, absorbing energy
B) Endothermic, releasing energy
C) Exothermic, absorbing energy
D) Exothermic, releasing energy

Answers

The following phrases best describe this reaction : A Endothermic, absorbing energy

Further explanation

Delta H reaction (ΔH) is the amount of heat change between the system and its environment  

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)  

∆H positive (endothermic): energy (heat) is absorbed from the environment to the system

∆H negative (exothermic): energy (heat) released from the system to the environment

Reaction

H₂O(g) + energy ⇒ H₂(g) + 1/2O₂(g)

In this reaction, it is shown that to break the bonds on the H₂O molecule to form H₂ and O₂ molecules will require energy (breaking the bonds requires energy)

This energy is usually called ∆H dissociation⁰

What does a salt bridge do?

A. It supplies energy to make the redox reaction happen.

B. It supplies the electrolyte solutions with metal ions.

C. It creates a path for metal ions to flow from anode to cathode.

D. It prevents charges from building up in the solutions.

Answers

Answer:

D. It prevents charges from building up in the solutions :)

Explanation:

A P E X

What was J.J. Thomson's Model known as?
A. The Pizza Model
B. The Chocolate Chip Model
C. The Mint Chocolate Chip Model
D. The Butterscotch Model

Answers

Answer:

B.The Chocolate Chip Model

Explanation:

which of these is an equation that follows the law of conservation of mass

Answers

Answer:

D

Explanation:

The yield ( → ) symbol always points to the

Answers

I dont get what the question is?? im so sorry!

lonic bonds tend to form between
a. nonmetals; nonmetals
b. metals; nonmetals
c. metals; metals
d. all of these

Answers

The correct answer is B
The correct answer is B

What is the formula to the covalent molecule Hexaboron Diphosphide?

Answers

Answer:Naming Covalent compounds

A B

hexaboron silicide B6Si

chlorine dioxide ClO2

hydrogen iodide HI

iodine pentafluoride IF5

Explanation:

How are the cells of the bicep muscle similar to the cells of the heart muscle?
A. They digest food.
B. They make energy.
C. They use carbon dioxide.
D. They form tissue that moves.

Answers

Answer:

I believe it's D

Explanation:

they both are worked a lot and it makes the most sense.

The cells in both bicep muscle and heart muscle make energy for contraction and relaxation. Hence, option B is correct.

What is cardiac muscles ?

Cardiomyocytes have a rather rectangular form and are short and thin. They have a single nucleus, cell organelles that are identical to those seen in skeletal muscle cells, and many sarcosomes, which supply the energy needed for contraction.

Intercalated discs with gap junctions for diffusion and communication link cardiomyocytes structurally. Myofibrils, which in turn are composed of thick and thin myofilaments, make up the sarcoplasm.

Due to their high energy needs, skeletal muscle cells have many mitochondria that enable them to produce enough ATP. Therefore, the cells in the bicep muscles and cardiac muscles produce energy.

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1. Kaleigh notices when she goes to the beach that sometimes the water rises as high as the pier. At other times of the day, the water barely covers the pillars under the pier. These differences in water level are primarily due to the gravitational influence of which of the following?
a. The Earth’s revolution b. The Moon c. asteroids d. comets

Answers

B. The moon
Tides are due to the gravitational forces of the Moon and the Sun. The tide is high when the moon or the sun or both are on the side of the sea and vice versa.
The effect of tides due to the moon is much greater than that of the sun, because the moon is much closer to the earth.

may we met again !

i love you,ella

Answers

Answer: When I see you again!

Explanation:

PLEASE HELP ASAP!!
What is the purpose of a unit conversion?
O
A. To change an amount in one unit to its equivalent amount in
another unit
B. To express a scientific expression in a general form all scientists
can understand
C. To express the amount of something in terms of its number of
smallest units
D. To keep track of the units associated with a number throughout an
equation

Answers

Answer:

A

Explanation:

A conversion factor is used to change the units of a measured quantity without changing its value.

Unit conversion is very important because the rest of the world other than three contries uses the metric system. So, converting unitsis important in science because it uses the metric system. The metric system are measurements like cm, m, l, mL, etc.

true or false, a temperature of 0°F is equal to 32°C

Answers

Answer:

false

Explanation:

Answer:true

Explanation:

How many atoms of S are in the following formula: 3Na(SO4)2

1) 6
2) 8
3) 3
4) 5

Answers

Answer:

6

Explanation:

Is nuclear energy poised to be part of America’s future?

Answers

Answer:

Nuclear energy powers our businesses, homes and military. America’s 95 operating nuclear reactors generate approximately 20% of our nation’s electricity and provide over half of our carbon-free energy. They also create good-paying jobs at power plants and uranium mines. Wyoming produced 87% of America’s domestic uranium supply in 2018.

Today, nuclear energy faces serious hurdles. Regulatory costs and subsidies for renewable energy technologies are forcing America’s nuclear power plants to close at an alarming rate.

Russia and China are subsidizing their government-owned nuclear companies to assert their energy influence around the world. China is searching the globe for uranium reserves and investing heavily in the countries where it’s found. They want to secure more nuclear fuel for themselves and increase their control of the global supply.

Meanwhile, American nuclear power plants have come to rely on cheap Russian imports of uranium to meet their nuclear fuel needs. Right now, roughly 40% of the uranium coming into the United States originates in Russia or its satellite states of Kazakhstan and Uzbekistan. Russian-backed companies are developing fuel that can be placed directly in American reactors.

Explanation:

You witnessed a student throw away a broken beaker in the regular trash can. Which of the following is the most important reason to alert your instructor?

Answers

Answer:

D

Explanation:

what properties of gold and platinum make these metals desirable for jewelry?

Answers

Answer: They are non-reactive and don't conform with other elements to form compounds. Because they are non-reactive, they don't corrode easily.

Explanation:

The  properties of gold and platinum  which make these metals desirable for jewelry is due to their electronic configuration due to which they are non-reactive and do not corrode easily.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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How many valence electrons does this atom have? (Urgent plz help)

Answers

Answer: theres 5

Explanation: valence electrons are the electrons in the outer shell. I took that test a few weeks ago :0

Balance the following equations:
i. H2SO4 + ….NaHCO3 → Na2SO4 + ….H2O + ……CO2
ii. H2 + I2 → ….HI
iii. …..NaOH + H2SO4 → Na2SO4 + …..H2O
iv. ……FeSO4 → Fe2O3 + SO2 + SO3
v. C3H6O2 + …..O2 → ….CO2 + …..H2O
b) Calculate the molecular masses of the following:
i. H2SO4

ii. CH4

iii. NH3

c) 56g of iron reacts with 71g of chlorine. How many grams of iron react with 35.5g of chlorine? ​

Answers

Hey There!_____________________________________Answer:_____________________________________Balancing the following equations:

(I) [tex]H_2SO_4+ 2NaHCO_3--> Na_2SO_4 + 2 H_2O + 2CO_2[/tex]

(II) [tex]H_2+I_2 --> 2HI[/tex]

(III) [tex]2NaOH+H_2SO_4--> Na_2SO_4+ 2H_2O[/tex]

(IV) [tex]2FeSO_4--> Fe_2O_3+SO_2+SO_3[/tex]

(V) [tex]2C_3H_6O_2+7O_2-->6CO_2+6H_2O[/tex]

_____________________________________Molecular Masses of the following:

------------------------------------------------------------------------------------------------------------

(I) [tex]H_2SO_4[/tex]

(ANS) [tex]98 \frac{grams}{mol}[/tex]

__________________________________________________________

Solution:

Molecular mass of,

H = 1

S = 32

O = 16

Now,

There are 2 atoms of Hydrogen, 1 atoms of Sulfur and 4 atoms of Oxygen present, thus,

[tex]H_2SO_4 = (1x2)+32+(16x4)[/tex]

[tex]H_2SO_4 = 98 \frac{grams}{mol}[/tex]

_____________________________________

(II) [tex]CH_4[/tex]

(ANS) [tex]16 \frac{gram}{mol}[/tex]

_________________________________________________________

Solution:

Molecular Mass,

Carbon = 12

Hydrogen = 1

Now

There are 1 atom of Oxygen and 4 atoms of Hydrogen present, thus,

[tex]CH_4 = 12 + (1x4)[/tex]

[tex]CH_4 = 16\frac{grams}{mol}[/tex]

_____________________________________

(III) [tex]NH_3[/tex]

(ANS) [tex]17 \frac{grams}{mol}[/tex]

__________________________________________________________

Solution:

Molecular Mass,

Nitrogen = 14 grams

Hydrogen = 1

Now,

There are 1 atoms of Nitrogen and 3 atoms of Hydrogen present, thus,

[tex]NH_3 = 14 + (1x3)[/tex]

[tex]NH_3 = 17 \frac{grams}{mol}[/tex]

_____________________________________How many Grams of Iron(fe):[tex]Fe + Cl_2 --> FeCl_2[/tex]

56     71

x       35.5

_____________________________________

[tex]X = \frac{56 x 35.5}{71}[/tex]

Simplify the equation

X = 28 grams

__________________________________________________________

Answer:

28 grams of Iron(fe) will react with chlorine.

_____________________________________Best Regards,'Borz'

Q
a. Ahmed worked on his crops of wheat and maize to produce a better-quality crop (which gives a more yield). In detail, write down how he altered his crop into a better yielding crop.

b. What is the name of the process that Ahmed used to breed his new better-quality wheat and maize.

Answers

Answer:

.

Explanation:

NaOH
+
AL-
Na3AlO3 +
H2
How many moles of NaOH are required to produce 405 moles of hydrogen?

Answers

Answer:

i have no idea and i dont get it

No idea makes no sense
Other Questions
Find the slope of the line that passes through (3, 8) and( 2,10) DUE IN 10 MINUTES PLEASE HELP When the Constitutional Convention of 1836 began, some of the delegates wanted to leave the meeting. They thought they should go to join the fight at the Alamo. SamHouston was able to convince these delegates that joining the battle was not a good idea.As delegates, they had urgent business to handle. The most pressing task they faced was the creation of a government for Texas. SamHouston said that the fight at the Alamo was happening because Texas did not have astrong government. Houston knew that for the revolution to succeed, it needed to havedirection. This passage from the text indicated that the most urgent problem facing Texas during its revolution wasA. The Siege and conquest of the AlamoB. Refusal of delegates to attend important conventionsC. The lack of fighting spirit among its troopsD. Creating an organized and effective government Which is a rational number? A 42 and B 16 and C 15 why was imperialism between European countries a significant cause of WW1? What is the nurse's opinion of Romeo The demand for gas in a country becomes price-inelastic.What will happen as a result?A. Gas workers will be less likely to be successful in obtaining wage increases.B. Gas workers will be more likely to be successful in obtaining wage increases.C. Total expenditure on gas by consumers will fall when its price rises.D. Total expenditure on gas by consumers will rise when its price falls. which descriptoin fits the term primary intitative and refumndem ? Which statement is the most likely conclusion you can draw from the coause-and-effect relationship shown in the diagram What were the four events that led to the start of the Civil War ? 21 IIIChoose the geologic formation that fits the description: rocks are stretched, movedvertically into blocks, and dropped; the lower blocks are called graben and the tallerblocks called horst.O volcanic mountainsO ocean ridgesO fault block mountainsfolded mountains plz help me out if you can In HIJ, h = 40 cm, J=20 and H=93. Find the length of j, to the nearest centimeter. Perform the operation. (-9x^2-2x)-(-9x^2-3x) On the foundation day of an organization, the president of the organization awards exceptionally performing employees with a bouquet and a plaque at a banquet every year. This is an example of: Which one is the correct answer?? The lined squares in the Punnett square represent____. what is 2+n+6?solve. 100 points!!! Has anyone done unit 5 test for AP World history?? Edge2020 Answers pls.. Will mark brainliest!!! find the number of each kind of atom2MgO Please Help! Thank you! explain the theme of polygamous marriage in Ripples story