Answer:
D. Ash is a different substance than wood.
Answer:
D the atoms of ash did not exist before
Explanation:
because I jnwo .... k
Iodine-138 decays by beta decay. What element does it produce?
[tex] {xe}^{138} [/tex]
Explanation:
the bottom number would be 54. This is because you add one to 53 to make it 54 and you add 0 to 138.
How does gravity act on an object?
1. exerts force upward on an object
2. repels objects
3. pulls objects towards the Earth
4. restores an object to its original position
Need answer asap!! First one to answer will get a brainliest!!
Answer:
3 can i have brainliest?
Explanation:
Plz, help! I need help with questions a and b! Plz, write your answer in complete sentences! And the first person to answer will get a brainliest! Plz, NO SCAM links!!!!!!
Answer: An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
The acceleration of an object depends on the mass of the object and the amount of force applied.
Whenever one object exerts a force on another object, the second object exerts an equal and opposite on the first.
Explanation: can i have brainliest
Name the 5 characteristics needed for a substance to be a mineral
naturally occuring, solid, inorganic, crystalline, structure, ans the same chemical composition throughout.
Answer:
A mineral has to be naturally occurring, inorganic, solid, crystal structure and definite chemical composition.
Explanation:
Explain the green house effect (make sure that you explain the role of the Nitrogen and Carbon cycle)
Answer:
Nitrogen emissions such as ammonia, nitrogen oxide and nitrous oxides contribute to particulate matter and acid rain. Nitrous oxide is a particularly potent greenhouse gas as it is over 300 times more effective at trapping heat in the atmosphere than carbon dioxide.
Explanation:
A submarine fills a special storage area known as a ballast with water in order to increase its density. This allows it to dive deeper in the ocean. When a submarine needs to rise rapidly, compressed air is used to push the water out of the ballast. What effect does replacing the water in the ballast with air have on the submarine?
Answer:
the submarine floats after replacing the water with the compressed air
Answer:
The submarine will rise.
Explanation:
To get a submarine to surface, the main vents in the top of the tank are closed and high-pressure compressed air is blown into the ballast tanks, forcing the water out through the flood ports at the bottom of the tank. This increases the vessel's displacement.
An object has a mass of 960 g and a volume of 15cm3 what’s the density?
Explanation:
density = mass ÷ volume
mass = 960g
volume = 15³ = 15 × 15 × 15
= 3375 cm
density = 960 ÷ 3375
= 0.28 g/cm³
PLS HELP (science)
Match the following molecules with the number of atoms they contain.
1. 2Fe
seven
2. 2Al 3O 2
eight
3. 4O 2
two
4. 5C
five
5. H 2SO 4
ten
Answer:
hello I will answer ur question if u answer mine
Explanation:
What type of force is known for exerting an upward force on objects in a fluid?
1. buoyant force
2. friction force
3. gravitational force
4. magnetic force
The First person to answer will get the brainliest!!!!!!
Answer:
A. buoyant force.
Explanation:
It is like a buoy, but it is force pushing an object while in water.
hope this helped.
Slow cooling of hot magma leads to the formation of ___________ crystals
Answer:
Slow cooling leads to the formation of large crystals. If the crystals remain undisturbed while cooling, they grow according to a regular pattern. Magma closer to the surface cools much faster than magma that hardens deep below ground. With rapid cooling, there is no time for magma to form large crystals.
Explanation:
Hope it's help
Answer:
large
Explanation:
HELP ME PLEASE!!! ASAP
it's c I believe
Explanation:
I believe
Answer: chromium and carbon monoxide
Explanation:
can someone solve this question please
Answer:
MgO + 2 HNO3 → Mg(NO3)2 + H2O
Explanation:
Mixing baking soda and vinegar is an example of an endothermic reaction. This means...
A. baking soda and vinegar are products in this reaction.
B. energy is taken in during the chemical reaction.
C. energy is released during the chemical reaction.
D. there is no change in energy during the chemical reaction.
Answer:
The answer is C
Explanation:
Helena uses the same force to move an object that has a mass of 12 kg and an object that has a mass of 5 kg. She predicts the 12 kg object will have a greater change in motion. Is she correct?
No, the object with the smaller mass will have a greater change in motion.
No, both of the objects will have an equal change in motion.
Yes, the object with the larger mass will have a greater change in motion.
No, neither object will have a change in motion.
Answer:
No, the object with the smaller mass will have a greater change in motion.
Explanation:
Hope this helps!
help me pls
words from the video:
What do fireworks, a fried egg, and a rusting vehicle have in common? They all involve chemical reactions. If two or more elements or chemical compounds come into contact with one another and there is enough energy present, a chemical change may take place.
When a substance undergoes a chemical change, the chemical structure of that substance is altered. A chemical change can also be called a chemical reaction. During a chemical reaction a new substance is formed.
Observe the chemical reaction between bromine and aluminum. Pieces of aluminum are cut from a strip of foil and added to liquid bromine. At first there is no reaction because of the protective oxide coating on the aluminum. But soon an exothermic reaction between bromine and aluminum causes brown fumes of bromine to be given off. But as a new substance, aluminum bromide is produced. White smoke is produced.
The resulting residue is also aluminum bromide. When two compounds or molecules react together to form new substances, they are called reactants. They new substances created plus any resulting ash, water vapor, or carbon dioxide are called products, because they are produced by the reaction.
Some chemical reactions, such as the explosion of fireworks, can happen very fast—in less than a second.
Others, like the rusting of a car, might take years. It is important to carefully examine chemical reactions because there are many ways substances can be changed without a chemical reaction taking place.
Changes of state, for example, from a solid to a liquid or from a liquid to a gas, always involve a physical change rather than a chemical one. Melting sulfur is a good example. When solid sulfur is heated to 120 degrees Celsius it melts and first forms a pale yellow liquid.
In this form the atoms are covalently bonded and the liquid can flow easily. However, heated up beyond 150 degrees Celsius, the result is a dark red liquid that is over 2,000 times stickier. The sulfur may have changed physically but it's still sulfur.
No chemical reaction has taken place. Most of the time changes of state can be reversed by either adding or taking away heat. When water is boiled, for example, water vapor molecules are released in the process.
If you captured all the vapor molecules in a container they would reform again as water droplets once the vapor cooled. When a chemical change occurs it is more difficult to revert the substance back to its original state.
Answer:
this is answers to the second picture
Explanation:
1- energy
2- structure
3- reaction
4- substance
5- reactants
6- products
7- changed
8- At first there is no reaction because of the protective oxide coating on the aluminum. But soon an exothermic reaction between bromine and aluminum causes brown fumes of bromine to be given off. But as a new substance, aluminum bromide is produced. White smoke is produced.
9- heated to 120 degrees Celsius it melts and first forms a pale-yellow liquid.
In this form the atoms are covalently bonded, and the liquid can flow easily. However, heated up beyond 150 degrees Celsius, the result is a dark red
10- When a chemical change occurs it is more difficult to revert the substance back to its original state. (To be honest I don't know)
PLEASE HELP
Sheila and Jerome are lab partners. They have the following materials at their table:
1 square of aluminum foil, 1 stirring rod, 1 beaker of water, 1 scoop of copper II chloride salt (blue color)
Step 1:Jerome adds all the salt to the water and stirs. The salt crystals disappears and the liquid solution turns a clear blue.
Step 2: Sheila tears up the aluminum foil into small pieces.
Step 3: Jerome dares her to put the foil in his beaker. They see the edges of the foil turn a rusty orange. As they stir, the beaker becomes warm to the touch and a vapor begins to rise from the surface of the beaker. Within a few minutes, the foil has disappeared and the liquid is now clear. There are orange-rust colored flakes floating in the liquid.
Q: Jerome claims that when the salt was added to the water it turned blue and the foil disappeared, these were chemical changes. He went on to explain that the chemical change was due to the fact that the atoms were speeding up. Sheila disagrees claiming that 1 is a physical change and 1 is a chemical change and Jerome’s evidence is incorrect. Who is correct, Jerome or Sheila? Write a scientific explanation (CER) to support your argument.
Answer:
jerome
Explanation:
What is inertia?
1 . the tendency of an object to stay at rest or in motion
2. the energy of an object because of its position
3. a force that pulls objects toward each other
4. a force that slows an object down
Answer:
A. The tendency of an object to stay at rest or in motion.
Explanation:
Interna makes stuff stay on motion or in place.
Answer:
the tendency of an object to stay at rest or on motion
Please help me with this
What are the evidences for suspecting the presence of waves?
Answer:
Well,
Conducting rods are good for detecting oscillating electric fields and conducting loops are good for detecting the presence of radio waves.
How do proteins respond to help heal a wound?
How does protein help with wound healing? Your body needs protein to help build and repair muscle, skin, and other body tissues. Protein also helps fight infection, balance body fluids, and carry oxygen through your body. When you have a wound that's healing, think of food as medicine.
to help build and repair muscle, skin, and other body tissues.
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Mixing baking soda and vinegar is an example of an endothermic reaction. This means...
A. baking soda and vinegar are products in this reaction.
B. energy is taken in during the chemical reaction.
C. energy is released during the chemical reaction.
D. there is no change in energy during the chemical reaction.
I HAVE A D- IN SCIENCE PLEASE HELP
Complete the sentence.
In chemical reactions, a product is _________.
A. any substance that is to the left of the arrow
B. any substance that is made of the greatest number of atoms
C. any substance that is made from the least number of atoms
D. any substance to the right of the arrow
Answer:
D - Any substance to the right of the arrow.
Explanation:
A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
In a chemical reaction, the mass of the reactants is 13.3 grams. Which of the following could represent the mass of the products?
A. 26.6 grams.
B. 13.3 grams.
C. 39.9 grams.
D. 3.3 grams.
Answer:
Hi the answer should be 13.3
Explanation:
Hope this helps! :D
What type of fossil forms when the impression from the remains of an organism is filled in with soil and hardens into the shape of the original organism?
Answer:
i belive its a "Mold fossil"
Explanation:
How does the law of conservation of mass apply to this reaction: Mg + HCl → H2 + MgCl2?
A.) Hydrogen and chlorine need to be balanced. There is an equal amount of magnesium on each side
B.) The equation needs to be balanced. There are fewer hydrogen atoms in the equation than magnesium or chlorine.
C.) Only the hydrogen needs to be balanced. There are equal numbers of magnesium and chlorine.
D.) The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.
Answer: The correct answer is A. Hydrogen and chlorine need to be balanced. There's an equal amount of magnesium on each side.
You have been given the task of designing a heat pack to relieve soreness in muscles by combining oxygen and iron. The more oxygen that is added to iron, the more it will heat up. Which of the following temperature changes would you be looking for?
A.There will not be a reaction
B.An increase in temperature, showing an endothermic reaction
C.You should not expect a temperature change because this is a physical reaction
D.An increase in temperature, showing an exothermic reaction
Answer:
an increase in temperature showing an endothermic reaction
Explanation:
the atmospheric oxygen is supplied to the iron .An endothermic reaction is any chemical reaction that absorbs heat from its environment.
This is the chemical formula of Nitrogen gas.
N₂
Which of the following is NOT true of nitrogen gas?
A. It is made of two atoms.
B. It is a molecule.
C. It is an element.
D. It is a compound.
Answer:
D
Explanation:
N₂ is not a compound because it is not made up of two or more different elements - it is only made up of nitrogen atoms
Hope this helps!
List the communities in a successional sequence of secondary succession?
The given communities can be ordered in the secondary succession as grass, shrubs, small trees and large tress.
What is secondary succession ?The life cycle of a plant is characterized by secondary ecological succession. Secondary succession, in contrast to primary succession, is a process initiated by an occurrence such as a forest fire, harvesting, hurricane, etc. that reduces an already established ecosystem (such as a forest or a wheat field to a smaller population of species.
As a result, secondary succession occurs on preexisting soil, whereas primary succession typically takes place in a location lacking soil. Many elements, including trophic interaction, starting composition, and competition, might influence secondary succession. Trade-off with colonization
Therefore, the given communities can be ordered from the small level to higher level as grass, shrubs, small trees and large tress.
Find more on secondary succession:
https://brainly.com/question/26675203
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Your question is incomplete. But your complete question is as follows:
List the given communities in a successional sequence of secondary succession? shrubs, small trees, grass, large tress.
What causes the seasonal changes viewed in the night sky?
Answer:
If you look at the night sky different
times of the year you see different
constellation.This change due to the
motion of the earth in it's orbit around
the sun.The shift of the sky is really
the motion of the earth around the sun.
Explanation:
Hope it helps
Explanation:
the factors which bring about the chemical reaction
Help!!!!! 30 points!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer: Hubble's brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth
Explanation: