Answer:
question 6: winter solstice
question 7: rotation is when an object spins around its axis, revolution is when an object travels in a path around another
question 8: the rotational period is equal to the period of revolution for the moon
question 10: true
Answer:
Question 6: winter solstice
Question 7: rotation is when an object spins around its axis,
revolution is when an object travels in a path around another
Question 8: the rotational period is equal to the period of revolution for the moon
Question 10: true
Explanation:
I took the test its right
What organ is known as the windpipe and the tube takes in air ?
Answer:
The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people. The trachea begins just under the larynx (voice box) and runs down behind the breastbone (sternum).
Explanation:
vanadium (IV) carbonate
tin (II) nitrite
cobalt (III) oxide
titanium (II) acetate
vanadium (V) sulfide
chromium (III) hydroxide
lithium iodide
lead (II) nitride
silver bromide
i just need the compounds
Answer:
Explanation:
1) Vanadium (IV) → V⁺⁴
Carbonate → CO₃⁻²
So , Vanadium (IV) Carbonate = V₂(CO₃)₄ or V(CO₃)₂
2) Tin (II) = Sn⁺²
Nitrite = NO₂⁻
So, Tin (II) Nitrate = Sn(NO₂)₂
3) Cobalt (III) = Co⁺³
Oxide = O⁻²
So , Cobalt (III) Oxide = Co₂O₃
4) Titanium (II) = Tn⁺²
Acetate = CH₃COO⁻
So , Titanium (II) Acetate = Tn(CH₃COO)₂ or Tn(C₂H₃O₂)₂
5) Vanadium (V) = V⁺⁵
Sulfide = S⁻²
So , Vanadium (V) Sulfide = V₂S₅
6) Chromium (III) = Cr⁺³
Hydroxide = OH⁻
So , Chromium (III) Hydroxide = Cr(OH)₃
7) Lithium = Li⁺
Iodide = I⁻
So , Lithium Iodide = LiI
8) Lead (II) = Pb⁺²
Nitride = N⁻³
So , Lead (II) Nitride = Pb₃N₂
9) Silver = Ag⁺
Bromide = Br⁻
So , Silver Bromide = AgBr
Which of the following best defines base isolation?(1 point)
Base isolation is a technique used by engineers to help prevent damage to buildings by volcanoes. The main structure of the building is separate from the base, which allows lava to pass under the building without causing much damage.
Base isolation is a technique used to prevent large-scale damage from volcanoes. New communities being built are set as far back as possible from the base of a volcano.
Base isolation is a technique used to prevent damage to buildings during tsunamis. The main structure of the building is separate from the base, which allows water to pass beneath buildings without causing much damage.
Base isolation is a technique used by engineers to help prevent damage to buildings by earthquakes. The main structure of the building is separate from the base and sits on a bed of springs.
Base isolation is a technique used by engineers to help prevent damage to buildings by earthquakes. The main structure of the building is separate from the base and sits on a bed of springs.
What is base isolation?Base isolation is a technique developed to prevent or minimise damage to buildings during an earthquake.
A base isolation system is a method of seismic protection where the structure (superstructure) is separated from the base (foundation or substructure). By separating the structure from its base the amount of energy that is transferred to the superstructure during an earthquake is reduced significantly.
Hence, option D is correct.
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At what temperature is breathing rate the highest? *
10 c
15 c
20 c
25 c
Answer:
Depends on what you're doing, you could be running and it goes higher, temperature isn't too much of a difference.
Explanation:
Is changing the color of the coin from copper to silver a physical or chemical change?
Answer:
physical
Explanation:
The zinc (which was already silver) coated the penny. The NaOH dissolved the zinc. (that was what made the water murky) And small pieces of zinc adhered to the penny (coated) It was a physical change because no NEW color was created.
If a cluster of stars is all the same color, what could that mean?
Answer:
Cluster HR Diagrams: Since all the stars in a cluster formed at the same time, they are all the same age. A very young cluster will have a HR diagram with a cluster of T-Tauri stars evolving towards the main sequence. ... Each star is plotted by its color and magnitude on the HR diagram.
Meiosis does PMAT twice! That means there is prophase I and prophase II. There is metaphase I and metaphase II. If the cartoon below has chromosomes in the middle of the cell, how would you know whether it was in metaphase I or metaphase II?
Answer:
- there are homologous chromosomes in the middle of the cell (metaphase I)
- there are sister chromatids in the middle of the cell (metaphase II).
Explanation:
What is the electronegativity difference between sodium and chlorine? What type of bond is this?
Answer:
Sodium chloride is ionically bonded. An electron has transferred from sodium to chlorine. Sodium has an electronegativity of 1.0, and chlorine has an electronegativity of 3.0.
...
The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.
What is electronegativity?The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.
Electronegativity is a kind of measure that tells how strongly atoms attract the bonding electrons to them.
Its symbol is a Greek letter that looks like an (X). It is directly proportional to the atom’s attraction for the electrons.
The compounds which form between the elements having a huge difference in the electronegativity are ionic compounds, and also have ionic bonding.
Electronegativity of Sodium = 0.93
Electronegativity of chlorine = 3.16
Difference = 2.23
The type of bond between them is ionic bond.
Therefore, The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.
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The pendulum has the greatest kinetic energy and no potential energy when it is _____.
swinging upward
at the top of the swing
at the bottom of the swing
swinging downward
Answer:
At the top of the swing
Explanation:
How does the ocean
currents affect weather?
Explanation:
Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate.Land areas also absorb some sunlight, and the atmosphere helps to retain heat that would otherwise quickly radiate into space after sunset.The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.
BRAINLIEST! A reaction is set up between magnesium and hydrochloric acid. After 30 seconds, the magnesium had decreased in mass by 45g. What was the rate of this reaction?
Answer:
Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.
Explanation:
What is the chemical formula for aluminum tartrate?
Answer: C12H12Al2O18
Explanation:
Hi! I wanted to know what my grade would be for my test. There are 23 questions in total. 2 of the 23 questions are essay questions that are worth 4 points each. I got two questions wrong that were worth 1 point each. Thank you!!
Answer:
high B or a low A:) Good Luck
Explanation:
What happens to the average kinetic energy of gas particles as temperature increases?
Answer:
it dies
Explanation:cause its too cold
Which is the best description of Darwin’s theory of evolution?
A.
It is the same as natural selection.
B.
It is based on the same ideas as Lamarck’s acquired characteristics.
C.
It states that all species evolve over time through natural selection.
D.
It describes DNA passed from parent to offspring as the driving force of evolution.
Answer:
d
Explanation:
stop answering people questions and not actually helping them typing random stuff like i just did here
It describes DNA passed from parent to offspring as the driving force of evolution.
What is evolution?
The basic idea of biological evolution is that populations and species of organisms change over time. Today, when we think of evolution, we are likely to link this idea with one specific person: the British naturalist Charles Darwin.In the 1850s, Darwin wrote an influential and controversial book called On the Origin of Species. In it, he proposed that species evolve (or, as he put it, undergo "descent with modification") and that all living things can trace their descent to a common ancestor.Darwin defined evolution as "descent with modification," the idea that species change over time, give rise to new species and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.
therefore option D is the correct answer.
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What happens when you try to separate the atoms by pulling on them?
Answer:
They explode!!!
Explanation:
When atoms separate they release all the energy and particles in themselves and cause a chain reaction to all other atoms causing an explosion
Hope this helps, and have a nice day!
Why do we use symbols on
the periodic table
Answer:
this lesson you learned that a chemical symbol is a shorthand way to represent an element and that each element on the periodic table has a unique chemical symbol. Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily.23-Dec-2015
Please help, i will mark brainliest.
Answer:
It’s the second option ; 2,1,3,2
Explanation:
How many moles in 0.672L of F2?
Answer:
c
Explanation:
i think if not tell me ok
Which word is described by this description?
A tool scientists use to measure earthquake activity.
A shield
B magma chamber
C seismograph
D Richter scale
Which best represents a balanced equation?
A. HgO → Hg + O2
B. 2Fe + O2 → Fe2O3
C. 2H2 + 02->2H2O
Explanation:
none of them
mark me as brainlist ok
Answer:
C
Explanation:
4 - H - 4
2 - O - 2
each side of the arrow has an equal amount of elements
A student wants to make 50-mL of a 0.6 mg/L solution of acetic acid. She will be making the solution by diluting a stock with a concentration of 2.0 mg/L. Put the steps for her dilution in order. 4. Cap the flask and invert several times to mix. 2. Fill the volumetric flask with deionized water until the meniscus touches the mark. 6. Swirl the flask to mix the contents. 1. Obtain a 50-mL volumetric flask. 3. Use a pipet to add the appropriate volume of stock solution to the flask. 2. Add approximately 10 mL of deionized water to the empty flask.
Answer:
The steps in order are;
1. Obtain a 50-mL volumetric flask
2. Add approximately 10 mL of deionized water to the empty flask
3. Use a pipet to add the appropriate volume of stock solution to the flask
4. Cap the flask and invert several times to mix
5. Fill the volumetric flask with deionized water until the meniscus touches the mark
6. Swirl the flask to mix the contents
The volume of the acetic acid to be added to the solution is 15 mL
Explanation:
The given steps are;
4. Cap the flask and invert several times to mix
5. Fill the volumetric flask with deionized water until the meniscus touches the mark
6. Swirl the flask to mix the contents
1. Obtain a 50-mL volumetric flask
3. Use a pipet to add the appropriate volume of stock solution to the flask
2. Add approximately 10 mL of deionized water to the empty flask
The given parameters are;
The volume of the volumetric flask = 50-mL
The concentration of the final solution of acetic acid = 0.6 mg/L
The concentration of the stock solution = 2.0 mg/L
Let 'x' represent the volume of the stock solution added, we have;
2.0 mg/L·x + (50 - x)×0 = 0.6 mg/L × 50-mL
x = 0.6 mg/L × 50-mL/(2.0 mg/L) = 15 mL
The volume of the stock solution to be added, x = 15 mL
1) A) Balance the following equation:
2 Fe + 6HCI →
3 H2 +
2 FeCl3
B) How many moles of hydrogen gas would be produced in a reaction that yields 7.5
moles of iron chloride?
Answer:
A) 2Fe+6HCl=3H2+2FeCl
B) 11.25
Explanation:
A)---
B) 2 - 7.5
3 - x ⇒ 2x = 7.5*3 ⇒x = 22.5/2 = 11.25
Which of the following is TRUE about a physical change to a substance?
A.
The atoms in a substance will divide.
B.
The mass of a substance will increase.
C.
New substances will likely be formed.
D.
The substance will have the same chemical properties.
Answer:
D.
The substance will have the same chemical properties.
Explanation:
Physical changes do not alter the chemical composition of a substance, so the chemical properties will not change.
2K + 2H20 - 2KOH + H2
How much hydrogen gas will be formed by reacting 65 g water?
Answer:gc
Explanation:
How much water does the average person in
the U.S. use on a daily basis?
Answer: The average person drinks 8 cups per day, equaling to 1/2 gallon per day and 182.5 gallons per year.
Explanation:
Answer:
An average of 82 gallons of water a day at home
Explanation:
is CH3CH2COOCH2 an aldehyde structure?
2NazN + 3MgO -> Mg3N2 + 3Na2O, what is the mole ratio of magnesium oxide to magnesium nitride?
Answer:
3:1 or 3/1
Explanation:
Look at the coefficients then set up ratio. Simplify to the base numbers and you get 3/1 or 3:1. Thus, for every 3 MgO you produce 1 Mg3N2
Who coined the term "ridgeology"?
Answer:
David R. Ashbaugh
Explanation:
David R. Ashbaugh is a Canadian police officer known for his extensive research on the friction ridge identification, introducing for the first time the use of the term ridgeology in forensic identification and the ACE-V methodology.
What are three ways a driver can cause a car to accelerate?
A. Turn the key in the ignition while the car is stopped.
B. Turn the steering wheel while the car is moving.
C. Press the gas pedal while the car is stopped.
D. Press the brake pedal while the car is moving.
The correct answer is:
C. Press the gas pedal while the car is running.
A driver can cause a car to accelerate by pressing the gas pedal.
What is Acceleration?
Acceleration is the rate at which an object's velocity changes over time. It is a vector quantity that includes both the magnitude (or speed) and direction of the change in velocity. In simpler terms, acceleration refers to the rate at which an object speeds up or slows down, or changes its direction of motion.
Acceleration is caused by forces acting on an object, such as a push or pull. In the case of a car, pressing the gas pedal causes the engine to generate more power and push the car forward, resulting in an increase in velocity and acceleration. Conversely, pressing the brake pedal causes the car to slow down and decelerate.
The gas pedal controls the amount of fuel and air that is delivered to the engine, which in turn determines how fast the engine runs and how much power it generates. Other factors that can affect a car's acceleration include the car's weight, the condition of its engine and transmission, the road surface and gradient, and the driver's skills and techniques.
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