Answer:
its D
Explanation:
Brooke should turn so that her back is to the Sun to her wall, and hold the Moon (ball representing Moon) in front of her. Therefore, option (D) is correct.
What is a Lunar eclipse?The eclipse of the moon occurs when the earth comes in between the sun and the moon. The earth blocks the light coming from the sun from reaching the surface of the moon and casts its shadow on the moon.
A lunar eclipse occurs on a full moon day and can be observed up to 3 lunar eclipses per year. A lunar eclipse can be categorized depending on how the sun, the moon, and the earth line up.
A partial lunar eclipse is when only a part of the moon moves into the shadow's earth. A total lunar eclipse is when the earth crossed directly in front of the moon and casts its shadow.
If Brooke's head is earth then it will be in the center and her back will be towards to sun poster on the wall. So that the ball in her hand can play as a moon to show the lunar eclipse.
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How many moles are present in 5.24 x 1023 molecules of CH4?
Answer:
0.807 moles
Explanation:
No of molecules = No of mole × Avogadro's number
No of mole = No of molecules / Avogadro's number
No of mole = 5.24×10^23/6.02×10^23
0.870 moles
when is light produced during e- configuration
25 points!!! please Which types of elements areconsidered neutraland Where are these types of elements found on the periodic table
Elements which composed of an equal amount of three components protons, neutrons and electrons are considered neutral elements. example of neutral elements are hydrogen, helium, lithium and beryllium...
18. Which metal is capable of forming more than one cation?
Li
Ba
Al
Sn
Answer:
Li
Explanation:
The ions S-2, Cl-1, K+, Ca+2, Sc+3 have the same total number of electrons as the noble gas argon. How would you expect the radii of these ions to vary?
Answer:
Cl^- <S^2-<Sc^3+ <Ca^2+<K^+
Explanation:
We know that ionic radius of ions decreases from right to left in the periodic table. This is because, ionic radii decreases with increase in nuclear charge. This explains why; Sc^3+ <Ca^2+<K^+.
Secondly, even though Cl^- is isoelectronic with S^2-, the size of the nuclear charge in Cl^- is larger compared to that of S^2- . Hence Cl^- is smaller than S^2- in ionic radius owing to increased nuclear attraction in Cl^-.
Why are summer days longer than winter days on Earth?
A. During the summer, Earth's rotational axis is parallel to the Sun's rotational axis.
B. During the summer, Earth is at the point in its orbit when it is closest to the Sun.
C. The region of Earth experiencing summer rotates past the Sun more slowly than the region experiencing winter.
D. The region of Earth experiencing summer is tilted toward the Sun while the region experiencing winter is tilted away from the Sun.
PLEASE HELP ITS A TEST
Answer:
A. During the summer, Earth's rotational axis is parallel to the Sun's rotational axis.
Explanation:
Actually, though, the Earth is tilted 23.4 degrees! (A circle is 360 degrees.) This tilt is the reason that days are longer in the summer and shorter in the winter. The hemisphere that's tilted closest to the Sun has the longest, brightest days because it gets more direct light from the Sun's rays.
Plz mark me brainliest if correct :)
During summer days, north pole of earth is exposed to sun because ofthe tilt of earth's rotational axis. Thus, The region of Earth experiencing summer is tilted toward the Sun while the region experiencing winter is tilted away from the Sun.
What is summer?Summer is a season in earth. There are different seasons in earth namely, summer, winter, spring, autumn etc. These season are arising due the revolution of earth around sun.
The distance of different regions of earth from sun changes due to the revolution of earth. Thus heat gained by these regions will be different in different seasons.
The north pole in summer gains more heat and light energy because of tilt in the axis of earth is towards the sun. Hence, the day time will be longer in summer than the winter. In winter, the earth is relatively apart from sun and thus tilt is and gains less light and heat .
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Please select the word from the list that best fits the definition.
Science lab, bring water and sodium
a) term calendar
b) weekly schedule
c) daily organizer
Answer:
C. Daily Organizer. Also called an agenda. We usually write notes in them for school related things so the answer is pretty self explanatory.
Could someone pls help me if you know it!!
Answer:
Beautiftul, begging under F
honest, beginning in thrid line under A
hopeful, fifth line under F
Explanation:
9. How long will it take 120 grams of Strontium-90 to decay to 7.5 grams?
with steps pls
Answer:
116 years
Explanation:
To solve this, we will use the half life equation;
A(t) = A_o(½)^(t/t_½)
Where;
A(t) is the amount of strontium left after t years;
A_o is the initial quantity of strontium that will undergo decay;
t_½ is the half-life of strontium
t is the time it will take to decay
We are given;
A(t) = 7.5 g
A_o = 120 g
From online values, half life of strontium-90 is 29 years. Thus, t_½ = 29
Thus;
7.5 = 120 × ½^(t/29)
Divide both sides by 120 to get;
7.5/120 = ½^(t/29)
0.0625 = ½^(t/29)
In 0.0625 = (t/29) In ½
-2.772589 = (t/29) × (-0.693147)
(t/29) = -2.772589/(-0.693147)
t/29 = 4
t = 29 × 4
t = 116 years
18. Which statement about photosynthesis is FALSE?
a
Tilmy green pigment chlorophyll captures light
energy
b Oxygen is needed as a reactant to produce
glucose
The process converts light energy from the
csun into chemical energy in the bonds of
glucose.
d
Carbon dioxide is needed as a reactant to
produce glucose.
Which statement about photosynthesis is FALSE?
Answer:
b. Oxygen is needed as a reactant to produce
glucose is the incorrect statement here
Explanation:
plants uses simple raw materials to prepare their food , which includes water ( H2O ) and Carbon dioxide ( CO2 ).
and traps sunlight by Green pigments known as chlorophyll and stores these energy in bonds of glucose molecules
so ,
after this reaction glucose and oxygen is formed as products
● hence we conclude that Oxygen is not needed as a reactant to produce glucose , oxygen is the bi product formed during photosynthesis.
If a sample of nitroglycerin containing 2 mL (density = 1.592g/mL) is detonated, how many total moles of gas are produced? If each mole of gas occupies 55L under the conditions of the explosion, how many liters of gas are produced? How many grams of nitrogen gas are specifically produced?
Total moles of gas = 0.1225
Volume of gas produced : 6.7375 L
mass of Nitrogen : 0.588 g
Further explanationGiven
2 ml of Nitroglycerin(ρ=1.592 g/ml)
Required
Total moles of gas
Solution
Nitroglycerin detonated ⇒ decomposition reaction
4C₃H₅N₃O₉(s)⇒ 6N₂(g)+12CO(g)+10H₂O(g)+7O₂(g)
mass of Nitroglycerin :
[tex]\tt mass=2~ml\times 1.592~g/ml=3.184~g[/tex]
moles of Nitroglycerin :
[tex]\tt moles=\dfrac{3.184}{227,0865~g/mol}=0.014[/tex]
Total moles of gas:
[tex]\tt \dfrac{6+12+10+7}{4}\times 0.014=0.1225[/tex]
Volume of gas produced :
[tex]\tt 0.1225\times 55=6.7375~L[/tex]
moles of Nitrogen :
[tex]\tt \dfrac{6}{4}\times 0.014=0.021[/tex]
mass of Nitrogen :
[tex]\tt 0.021\times 28=0.588~g[/tex]
WHICH OF THE FOUR COMPOUNDS HAS BONDS WITH THE GREATEST DEGREE OF POLARITY (MOST POLAR)?
Answer:
I NEED TO KNOW THIS TOO
Explanation:
IVE BEEN LOOKING FOR THE ANSWER
Have ya helped anybody out today, how? And good job!
Answer:
I helped take care of my baby cousin :)
Explanation:
Why is there a leap year every four years?
Answer:
Because we are not perfect
Explanation:
This day is added to the calendar as a corrective measure, because the Earth does not orbit the sun in precisely 365 days.
Tritium (H-3) is a radioactive isotope of hydrogen with a half-life of 12.3 years. How long would it take for a 40.0g sample to decay down to 1.25g
Answer:
the answer maybe is 61.5 years (please check with others) tq
Explanation:
40/2=20
20/2=10
10/2=5
5/2=2.5
2.5/2=1.25
so one half life is 12.3 years
then 12.3 ×5 =61 .5
(why 5 ? because it decay 5 times to get 1.25 from 20)
Anna was looking at a map that showed where hurricanes had formed. She noticed that more hurricanes formed over tropical oceans than over colder ocean areas. Which of these best explains
why more hurricanes form over tropical oceans?
Water has fewer currents in tropical oceans than in colder oceans.
Air has less moisture over tropical oceans than over cold oceans.
Water has more waves in tropical oceans than in colder oceans.
Air has more moisture over tropical oceans than over
Answer: D
Explanation:
what water has 97% of water
Answer:
ocean
Explanation:
because its easy
Which kind of worm has a closed circulatory system?
a planarian
a fluke
a pinworm
an earthworm
An earthworm has a closed circulatory system.
The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm.
As important as they are alive for distributing nutrients and organisms and decomposing matter, worms are also very important in the food chain. They provide a crucial protein-rich source of food for other important species like birds, hedgehogs and frogs.
They may live up to eight years, though one to two is more likely. Full size for an earthworm varies among species, ranging from less than half an inch long to nearly 10 feet.
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instructions for #4-5, balance each equation after substituting symbols and formulas for words, remembering to include abbreviations for the physical state.
For subscripts, just make sure the number is in the right location in the compound formula.
4. Iodine crystals react with chlorine gas to form solid iodine trichloride.
5. Solid sodium bicarbonate reacts with hydrochloric acid [HCl (aq)] to produce aqueous sodium chloride, water, and carbon dioxide gas.
Answer:
Ok:
Explanation:
4.
[tex]I_2_{(s)} + 3Cl_2_{(g)} => 2ICl_3{(s)}[/tex]
5.
[tex]NaHCO_3_{(s)} + HCl_{(aq)} => NaCl_{(aq)} + H_2O_{(l)} + CO_2_{(g)[/tex]
I've decided that i still want to have some orange juice
Answer:
Oh thats great..
But I hate juice :(
what does our life have in common with the periodic table, What is the relationship between the world around us and the periodic table?
Answer:
Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.
Explanation:
what is the balanced chemical equation for sulphuric acid and zincoxide
Answer:
ZnO + H2SO4 = ZnSO4 + H2O | Chemical reaction and equation
Explanation:
gloogle
Which of the following is an example of a precipitate?
A: liquid evaporating into gas
B: a solid formed from a frozen liquid
C: a chunky solid formed from two liquids combining
D: a liquid solution that contains two substances
Match each atomic particle with the correct charge.
1. proton neutral
2. neutron positive
3. electron negative
The proton is a postitive charge, therefore, being 1 (proton) matched to positive. Whilst neutron (2) is matched to neutral. Thus electron (3) is matched to negative.
How can mutations occur in cells? Submi Save and Exit Next Mark this and return
by rounding them to the neerest 10
pls asap figure it out pls I will mark brainliest
Answer:
NaCl (Na is a metal and Cl is a nonmetal) MgO (Mg is a metal and O is a nonmetal) Al2O3, NaF, Na2O
Explanation:
You have to have a metal and a non metal together for it to be ionic
What is true about a chemical reaction
Answer: energy is transferred, but it can go to the products or the reactants.
Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.
The power has gone out and you find a flashlight that uses batteries. When you turn on the flashlight, you are transforming:
100 pts
HELP!!!!!!!!
Between steps 2 and 3, the chemical energy in the coal is converted to
electrical energy
mechanical energy
transitional energy
heat energy
Answer:
It Is Transitional Energy.
Explanation: I Took The Quiz And Got It Wrong. It Showed That Transitional Energy Was The Correct Answer.
Answer:
heat energy
Explanation:
1. Which term best describes ultraviolet radiation?
a. Harmless
b. Invisible
c. Undetectable d. Beneficial