Can someone help me??? Its for Science Fair
I need to write a Rationale
My project is on candles and wax.
If it'll help, here is my hypothesis: If the waxes being tested are beeswax, palm wax, paraffin wax, and soy wax, then the palm wax should burn the slowest and last the longest.
Answer:
OK, you can say:
Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low viscosity liquids. Waxes are insoluble in water but soluble in organic, nonpolar solvents. Natural waxes of different types are produced by plants and animals and occur in petroleum.
And for more explanation you can visit
https://en.m.wikipedia.org/wiki/Wax
How would you classify this atom of oxygen?
Answer:
Oxygen is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste. Oxygen is found naturally as a molecule.
scientist created diagram X to represent the molecules of a kind of gas in a closed container. Diagram Y represents the molecules in the container after the size of the container was reduced. The temperature in the container was not changed. What most likely happened to the system when the scientist changed the size of the container? A. Matter was added. B. Matter was removed. C. The pressure increased. D. The pressure decreased.
The most likely outcome when the scientist changed the size of the container is that the pressure increased.
Option (C) is correct.
When the size of the container is reduced while keeping the temperature constant, the gas molecules experience a decrease in volume. According to Boyle's law (P₁V₁ = P₂V₂), if the volume decreases, the pressure of the gas will increase.
Diagram X represents the initial state with larger volume, and diagram Y shows the final state with reduced volume. Since the temperature remains constant, the pressure must change to counterbalance the change in volume.
As the volume decreases, the gas molecules have less space to move around, and they collide more frequently with the container walls. This increased collision rate results in a higher pressure exerted by the gas on the container walls.
Hence, the most likely outcome when the scientist changed the size of the container is that the pressure increased, which corresponds to option C.
To learn more about Boyle's law here
https://brainly.com/question/2689760
#SPJ3
What are the strengths and limitations of your model?
Answer:
Missing Details. Most models can't incorporate all the details of complex natural phenomenaExplanation:
Write a paragraph comparing protons, neutrons, and electrons. Be sure to include mass, location, and electric charge.
Answer:
Explanation:
Dalton's Atomic Theory explained a lot about matter, chemicals, and chemical reactions. Nevertheless, it was not entirely accurate, because contrary to what Dalton believed, atoms can, in fact, be broken apart into smaller subunits or subatomic particles. We have been talking about the electron in great detail, but there are two other particles of interest to us: protons and neutrons. We already learned that J. J. Thomson discovered a negatively charged particle, called the electron. Rutherford proposed that these electrons orbit a positive nucleus. In subsequent experiments, he found that there is a smaller positively charged particle in the nucleus, called a proton. There is also a third subatomic particle, known as a neutron.
Protons, neutrons, and electrons are fundamental particles that constitute the building blocks of atoms.
Protons and neutrons are found in the nucleus, the central core of the atom, whereas electrons are located in electron shells surrounding the nucleus. Protons carry a positive electric charge and have a mass of approximately 1 atomic mass unit (amu).
Neutrons, on the other hand, are electrically neutral, meaning they have no electric charge, but they also have a mass of about 1 amu. Electrons, which are much smaller than protons and neutrons, have a negligible mass of approximately 1/1836 amu and bear a negative electric charge that exactly balances the positive charge of protons, resulting in an overall neutral charge for the atom. The combination of these three particles determines an element's chemical properties and behavior in chemical reactions.
To know more about neutrons here
https://brainly.com/question/31977312
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Use the space below to tell the probability of Tom and Tina having a child with sickle-cell and explain how you determine that.
ILL GIVE U 100 POINTS!!!!
Using the letters from Betelgeuse and Aldebaran, see how many different words of four letters or more you can make in ten minutes. Each word you make counts as 5 points. Record your words in the Report document.
Answer:
I
Explanation:
5 SENTENCES DESCRIBE THE STEP BY STEP PROCESSES OF HOW THE IMMUNE SYSTEM PROTECTS US. Pls and thank u
Watch this video to help u with the question https://kidshealth.org/en/kids/ismovie.html?WT.ac=k-ra
Answer:
The immune system
Explanation:
The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins. As long as your immune system is running smoothly, you don't notice that it's there.
If you throw a ball straight up into the air, when is the kinetic energy the greatest?
Friction is similar to drag. Like drag it acts on an object in the opposite direction from the object’s motion.
How does the friction slow motion?
Answer:
• Friction is a force that occurs when two surfaces slide past
one another.
• The force of friction opposes the motion of an object,
causing moving objects to lose energy and slow down.
• When objects move through a fluid, such as air or water, the
fluid exerts a frictional force on the moving object. The
frictional force from a fluid is called a drag force.
• Friction examples: tires skidding to a stop on a road,
sandpaper rubbing against wood, air pushing against the
nose of an airplane
• Friction drag force causes objects to slow down as they move through a
fluid, such as air or water.
• Drag force depends primarily on the following variables:
– Cross‐sectional area of an object moving through the fluid
– Speed of moving object
– Density of the fluid
– Drag coefficient (determined by experiments; related to the shape of
the object)
• Drag force is especially dependent on the speed of an object. As an
object’s speed increases, the drag force from the fluid increases
exponentially.
• For example, when you drive at high speeds, the frictional force of air on
the car increases and fuel economy decreases
Hope this helps, have a nice day/night! :D
Provide 3 examples of substances that are mixtures and list the substances in them.
PLEASE HELP, I NEED TO FILL THESE TWO BOXES OUT!
(subject is science)
Answer: c
Explanation:
An Expert, please answer this question!
A student made the table shown to list some contact and non-contact forces.
Which statement best explains why the table is incorrect?
A)Spring force is a force acting at a distance.
B) Air resistance is a force acting at a distance.
C) The student and desk have to be in contact to apply the force.
D) The electromagnet and wire have to be in contact to apply the force.
Incorrect answers = 2 stars (Nothing personally just to let others know so they don't get a bad score)
Correct answer = 5 stars and a thanks! (And maybe Brainliest!)
Incomplete/Absurd/link answers = 1 star and I will report (if it's incomplete I will ask you to finish it but if you don't iI will report and give 1 star)
Answer:
C) The student and desk have to be in contact to apply the force.
Explanation:
I am pretty sure :)
Answer:
C
Explanation:
What is the Uncontrolled variables/limitations for this science expirement? Does the shape of an ice cube affect how quickly it grows? Need help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAP
Draw Bohr diagrams for the following
example calculation for a.)
N = 39 - P
N = 39 - 19
N = 20
P = 19
What is the function of peristalsis?
Multiple choice question.
A)
to move food through the digestive system
B)
to remove excess liquid from the body
C)
to chemically digest food to release nutrients
D)
to absorb nutrients into the blood
Answer: A
Explanation
The digestive tract carries out the function of peristalsis by moving food through the system. Peristalsis also removes excess liquid from the body. Chemical digestion breaks down food into small nutrients, but this process does not involve peristalsis. Finally, absorption of nutrients into the blood does not fall under the purview of peristalsis.
PLZZ help.
p.s it's fro science the big bang theory
I DON"T KNOOOWWW
Answer:
i think its subatomic particles
Explanation:
When does the first step of digestion usually occur?
Multiple choice question.
A)
when the organism discovers the food
B)
when the food is chewed
C)
when the food is swallowed
D)
when the nutrients are absorbed
Answer:
B
Explanation:
Firstly, when the food is chewed then the saliva is secreted and mixed with food. Then the food is swallowed and nutrients are absorbed.
Why does transporting materials during production release carbon dioxide?
-Materials release carbon dioxide as they move around in vehicles.
-Materials exposed to air get warm easily. The warm materials release more carbon dioxide.
-Materials break down as they move and cause pollution. Pollution releases carbon dioxide.
-Vehicles used to move materials consume fuel and release carbon dioxide.
Answer:4
Explanation:
Provide 3 examples of substances that are mixtures and list the substances in them
Answer:
Water and salt = salt water
Oxygen and water = sea foam
Smoke and fog = smog
Explanation:
Hope this helped, nya~ :3
Why does transporting materials during production release carbon dioxide?
-Materials release carbon dioxide as they move around in vehicles.
-Materials exposed to air get warm easily. The warm materials release more carbon dioxide.
-Materials break down as they move and cause pollution. Pollution releases carbon dioxide.
-Vehicles used to move materials consume fuel and release carbon dioxide..
HELP PLEASEEEE
Answer:
Greenhouse gas emissions from transportation primarily come from burning fossil fuel for our cars, trucks, ships, trains, and planes. Over 90 percent of the fuel used for transportation is petroleum based, which includes primarily gasoline and diesel.
Explanation:
Explain 3 examples of kinetic and Potential energy
Answer:
1. Planets; movement of planets around the sun and other stars in the galaxy is kinetic energy
2. Rubber Bands; can be classified as both potential and kinetic energy, depending on the state of the band (when stretch=potential energy; when released=kinetic energy)
3. Rivers; strictly kinetic energy. the water is constantly moving creating kinetic energy.
Explanation:
Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?
A) Alpha particles are repelled by cathode rays of elements
B) Cathode rays are deflected towards a positively charged rod
C) a particulat frequency of light is produced by a gas in an excited state
D) certain areas of the atom called orbitals contain all the charged particles
Answer:
B) Cathode rays are deflected towards a positively charged rod.
Answer: The correct option is b (Cathode rays are deflected towards a positively charged rod )
Harrison is making bread. He prepares some dough and places it into the oven. Harrison realizes a gas, carbon dioxide, is coming out of the dough as it bakes.
Which options are true about carbon dioxide?
A) It is created from the atoms of the dough.
B) It is the dough changing states from solid to gas.
C) It is a new gas released when atoms are destroyed.
D) It is made of atoms that did not exist before.
Answer:
C
Explanation:
Correct me if I'm wrong!!
Why do you think the older scientist disregarded the younger scientist's prediction?
Renaldo says that concrete is useful because it is a low-maintenance material. Cynthia says that using concrete can be bad because it creates heat islands. Who is right?
-Only Cynthia is right.
-Neither is right.
-Both are right.
-Only Renaldo is right.
HELP PLEASE
What connections can you make between Albinism in humans and Albinism in animals?
Answer:
the connections you can make between albinism in humans and in animals is that animals can appear in white or pink or an animal will have pink eyes, nail, skin/scales while an human will also have nails and skin, the human body can't have scales and a human can't really have pink eyes
Hope this helps :p
Explanation:
dont read unless you need some examples...
Melanin is produced by cells called melanocytes, which are found in your skin, hair and eyes. Albinism is caused by a mutation in one of these genes. Different types of albinism can occur, based mainly on which gene mutation caused the disorder.This genetic condition gets passed to offspring when both parents carry the recessive gene. When albinism is present, the animal can appear white or pink. An animal can be completely albino (pure albino) or have leucism. Pure albino animals will have pink eyes, nails, skin and/or scales.Ocular albinism type 1 is inherited in an X-linked pattern. A condition is considered X-linked if the mutated gene that causes the disorder is located on the X chromosome , one of the two sex chromosomes
Are all mutations harmful? Explain.
Answer:
Most mutations are not harmful
Explanation:
but some can be. A harmful mutation can result in a genetic disorder or even cancer. Another kind of mutation is a chromosomal mutation. Chromosomes, located in the cell nucleus, are tiny threadlike structures that carry genes.
by the way this is copyed
Why do you think the older scientist disregarded the younger scientist's prediction?
Answer:
pls explain, can you show what the younger scientist did.
Explanation:
Why do you think the older scientist disregarded the younger scientist's prediction?