Answer:
Large-scale nuclear is fission a rare phenomenon on Earth because
atoms that undergo fission aren't concentrated enough to sustain a chain reaction.
Hope it helps you.Answer:
Atoms that undergo fission aren't concentrated enough to sustain a chain reaction. For example, the decay chain of U-238 is called the uranium series. ... Uranium is find in ores on Earth with very law mass percentage in it, so fission is not possible
~Easy Points~.........what does H2o stand for ?
PLZ HELP MEEE
A tire company wants to determine what kind of rubber will last the longest for their tires. What are some variables that the researchers will want to make controlled variables?
In an experiment, we can define 3 types of variables.
Independent variables: Are these ones that the scientist can control and modify, in this case, would be the kind of rubber for the tires.
Dependent variables: Are the variables that react to the changes in the independent variables. In this case, would be "how much lasts each type of rubber".
Controlled variables: Are all of these variables that also have an impact on the dependent variable, so we need to control them (fix them) so they do not affect the study of the independent variable.
So, for this particular experiment, to find controlled variables we need to think on what things do affect the durability of tires.
Some examples can be:
The material of the ground where the tires are being tested.The temperature of the ground where the tires are being tested.The type of car where the tires are being tested.The speed at which the tires are being tested.The internal pressure at which the tires are being tested.If you want to learn more, you can read:
https://brainly.com/question/17687509
PLEASE HELP THIS IS IMPORTANT. Answer the ones u know leave the ones u don’t. Be specific too and I’ll give u a brainlist/5 star !!!
1) you would have noticed water vapour forming on the inside of the glass jar, where did this water come from?
hint: Think about what happens in a combustion in a combustion reaction.
2) explain why the water rises in the glass jar?
Answer:
1) Condensation.
2) See below.
Explanation:
1) The warmer water vapour from the surroundings came into contact with the cooler inner surface of the glass jar and condensed, forming the water droplets (water vapour) on the inside of the glass jar.
2) As condensation occurs, condensed water vapour will drip into the water solution in the glass jar, causing the water to rise in the glass jar.
any two uses of mixtures
Answer:
Any two used of mixtures are 1) sand and water 2) sugar and salt
Explanation:
An Exothermic reaction is
o when energy is released
O when energy is absorbed
O When energy is not released or absorbed
O No answer text provided.
Revision has a atoMic number of 37 and a mass number of 85. HIW many protons, neutrons and electrons does an ion of rubidium with a 1+ charge have
Answer: 37 protons, 48 neutrons, and 36 electrons.
Explanation: I assume "Revision" is Rubidium. It is atomic number 37, so it has 37 protons. It's atomic mass is 85, so it has an average of (85-37) = 48 neutrons. It has a charge of +1, so one electron of the original 37 has left.
Ice cracking
a
Chemical Change
b
Physical Change
Answer:
Physical change
Explanation:
As no new substance is formed
Please help me with this chemistry
Answer:
D=1.56g/mL
Explanation:
Density=m/v
D=14.06g/(24mL-15mL)
D=14.06g/9mL
D=1.56g/mL
ii. What is the purpose of the scientific method? (2 points)
b. Through his meticulous experiments, Lavoisier first proposed what is now known as the law of conservation of matter. A similar law developed later, which was called the law of conservation of energy. (6 points)
i. What does the law of conservation of energy say? (2 points)
ii. List two different kinds of energy. (2 points)
iii. What does the law say about changes energy can undergo? (2 points)
Answer:
ii. Purpose of scientific method
=The Scientific Method helps you put together experiments, use data to find conclusions and interpret them. In short, the Scientific Method is a step-by-step process: First, observe. Use your senses and take notes about the situation
The aim of all scientific methods is the same which is used to analyze the observation made at the beginning. It has been seen that various steps are adopted per the requirement of any given observation. Observation is the first step of scientific method.
What is scientific method?The process with the help of which scientists try to investigate, verify or construct an accurate and reliable version of any natural phenomena is defined as the scientific method. They are done by creating an objective framework for the purpose of scientific enquiry.
The purpose of scientific method is to provide discrete steps for analytically answering a research question. It involves the formulation of hypotheses and application to come up with logical explanations.
The scientific method establishes the facts through testing and experimentation. It involves prediction, conducting experiment and last analyze the results.
To know more about scientific method, visit;
https://brainly.com/question/17216882
#SPJ2
According to the Bohr model for the hydrogen atom, the energy of the atom isn't continuous but has certain discrete energy ________, each of which is related to a fixed circular _____________ of the electron around the nucleus. The farther the electron is from the nucleus, the ________ the energy system.
Answer:
in the part of material and also its gaining to support almost imaginary for all over of this things
Explain why the product at the negative electrode is not always a metal.
The product at the negative electrode is not always a metal because it will only be produced if it is less reactive than hydrogen.
What is a Metal?These are materials which donate electrons in a chemical reaction and have high heat and electrical conductivity.
Metals are more reactive than hydrogen which is why it is not always produced at the cathode.
Read more about Metals here https://brainly.com/question/4701542
#SPJ2
What isotope will be formed by the fusion of a H-1 isotope and a H-3 isotope? Would the
product be a stable Isotope? Explain.
|
Answer:
Use the edit icon to pin, add or delete clips.
Explanation:
hfdknvd hcde
Is Cl2 chlorine, dichlorine or dichloride?
Answer:
Cl² is dichlorine
Explanation:
.mark me as brainliest ❤️
how many figures does 40.01 have?
Answer:
4 the number of figures
Explanation:
answers above
I don't know how to write about tentative.....can u help me?
Answer:
The definition of tentative is not definite or final. An example of tentative is possible, though not definite, plans to go to the movies sometime on Friday.
What is the best definition of
molecule?
A. A molecule is an atom that cannot be broken
down.
B. A molecule is a positively charged partide.
C. A molecule is the smallest part of a substance
that is still that substance
Answer:
C
Explanation:
A molecule is a smallest particle of a substance that has all of the physical and chemical properties of that substance. or
Molecules are two or more atoms chemically joined together.
define mitochondria.
Answer:
An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner part being folded inwards to form layers (cristae).
Explanation:
A car is moving with the a speed of 25m/s.Calculate the distance travelled the car in 30seconds
Answer:
750 m
Explanation:
Hi there!
We're given that:
⇒ The speed of the car is 25 meters/second
⇒ The car travelled a certain distance in 30 seconds
To calculate distance, use the formula:
Distance = Speed × Time
Distance = 25 × 30
Distance = 750
Therefore, the car travelled a distance of 750 m in 30 seconds.
I hope this helps!
Answer:
[tex]\boxed {\boxed {\sf 750 \ meters}}[/tex]
Explanation:
We are asked to find the distance a car traveled. Distance is the product of speed and time.
[tex]d= s \times t[/tex]
The speed of the car is 25 meters per second. The time is 30 seconds.
s= 25 m/s t= 30 s[tex]d= 25 \ m/s * 30 \ s[/tex]
The units of seconds cancel each other out.
[tex]d= 25 \ m * 30[/tex]
[tex]d= 750 \ m[/tex]
The car traveled 750 meters in 30 seconds at a speed of 25 meters per second.
You just created the equality 1 fluid oz f l u i d o z = 29.7 mL m L . Use this equality to determine how many ounces of water will be measured using the measuring cup introduced before Part A when making the cake. Keep in mind that the level of precision for the measuring cup is to the half-ounce as you round your answer.
The equality of both units (i.e. mL and ounces) implies they measure the same quantity, and they can be converted between one another.
Given that:
[tex]1 fl\ oz = 29.7mL[/tex]
The measurement in part A is not given. So, I will use an assumed value to provide an explanation.
Assume that the amount of water measured using the measuring cup in part A is 10mL
The equivalent number of ounces (x) is calculated as follows:
[tex]1 fl\ oz = 29.7mL[/tex]
[tex]x = 10mL[/tex]
Cross multiply
[tex]x \times 29.7mL = 1fl\ oz \times 10mL[/tex]
Cancel out common units
[tex]x \times 29.7 = 1fl\ oz \times 10[/tex]
[tex]x \times 29.7 = 10fl\ oz[/tex]
Divide both sides by 29.7
[tex]x = \frac{10}{29.7}fl\ oz[/tex]
[tex]x = 0.3367 fl\ oz[/tex]
Approximate to the nearest half
[tex]x = 0.5 fl\ oz[/tex]
This means that the equivalent amount of water is 0.5 ounces
What if the measurement is 55mL.
We apply the same steps, as follows:
[tex]1 fl\ oz = 29.7mL[/tex]
[tex]x = 55mL[/tex]
Cross multiply
[tex]x \times 29.7mL = 1fl\ oz \times 55mL[/tex]
Cancel out common terms
[tex]x \times 29.7 = 1fl\ oz \times 55[/tex]
[tex]x \times 29.7 = 55fl\ oz[/tex]
Divide both sides by 29.7
[tex]x= \frac{55}{29.7 }fl\ oz[/tex]
[tex]x= 1.85185 fl\ oz[/tex]
Approximate to the nearest half
[tex]x = 2fl\ oz[/tex]
This means that the equivalent amount of water is 2 ounces
Read more about unit conversions at:
https://brainly.com/question/13016491
Which is correct?
a
Electrons in a p sublevel can shield the s electrons that are in the same
principal energy level.
b
Electrons in an s sublevel can shield the p electrons that are in the same
principal energy level.
с
Both a and b are true.
d
Neither a nor b are true.
A 2.00 mL of substance A has a density of 18.4 g/mL and a 5.00mL sample of substance B has a density of 35.5 g/mL. Do you have an equal mass of Substances A and B.
Answer:
No, you have more mass of substance B
Explanation:
use d =m/v to find mass
m= d*v
mass A = 18.5 g/mL * 2.00 mL = 37 g
mass B = 35.5 g/mL * 5.00 mL = 177.5 g
No, the substances A and B does not have equal mass. A further explanation is provided below.
Given:
Density,
D₁ = 18.4 g/mLD₂ = 35.5 g/mLVolume,
V₁ = 2.00 mLV₂ = 5.00 mLAs we know,
→ [tex]Mass = Density\times Volume[/tex]
The mass of substance A will be:
→ [tex]m_A = 2.00 \ mL\times 18.4 \ \frac{g}{mL}[/tex]
[tex]= 2.00\times 18.4 \ g[/tex]
[tex]= 36.8 \ g[/tex]
The mass of substance B will be:
→ [tex]m_B = 5.00 \ mL\times 35.5 \ \frac{g}{mL}[/tex]
[tex]= 5.00\times 35.5 \ g[/tex]
[tex]= 177.5 \ g[/tex]
We can see that [tex]m_A \neq m_B[/tex].
Thus the above response is correct.
Learn more about mass of sample here:
https://brainly.com/question/19791328
Why water in a container is
Curved but not flat
Does an astronaut have more mass on earth then space? why or why not?
Answer:
No
Explanation:
No, his mass remains the same no matter where he is in the universe.
But then again the moon has less gravitational pull, therefore your weight and mass will be smaller in space and on the moon than on earth
I hope this was helpful! ;)
if electromagnetic radiation has a frequency of 2.0 x 10^15 s^-1 what is the radiation’s energy?
[tex]1.3\times 10^{-18}[/tex] Joule is the radiation’s energy.
Explanation:
The energy of electromagnetic radiation is given by Planck's law:[tex]E=h\times \nu[/tex]
Where:
E = Energy of electromagnetic radiation
h = Planck's constant=[tex]6.626\times 10^{-34} Js[/tex]
[tex]\nu[/tex] = frequency of the electromagnetic radiation
Given:
The frequency of the electromagnetic radiation =[tex]\nu = 2.0\times 10^{15} s^{-1}[/tex]
To find:
The energy of the electromagnetic radiation
Solution:
The frequency of the electromagnetic radiation = [tex]\nu = 2.0\times 10^{15} s^{-1}[/tex]
The energy of the radiation = E
[tex]E=h\times \nu\\E=6.626\times 10^{-34} Js\times 2.0\times 10^{15} s^{-1}\\=1.3\times 10^{-18} J[/tex]
[tex]1.3\times 10^{-18}[/tex] Joule is the radiation’s energy.
Learn more about Planck' law here:
brainly.com/question/13275323?referrer=searchResults
brainly.com/question/5528489?referrer=searchResults
5. What is common among the following phenomena?
* Blinking of traffic light
* Rotation of blades of fan
* Swinging of pendulum of a clock
a) All are chemical changes
b) All are periodic changes
c) All are undesirable changes
d) All are irreversible changes
Answer:
All are periodic changes
[And is that a todoroki pfp, I like MHA too
(・∀・) ]
A. Identify the type of molecule shown in the drawing. (2 points)
Answer: 1) Caboxylic acid
2) Ether
3) Ester
4) Aldehyde
5) Amine
6) Alcohol
Explanation: The type of a molecule is based it's primary functional group.
https://en.wikipedia.org/wiki/Functional_group
The identities of the given molecules shown in the drawing are:
1) Carboxylic acid.
2) Ether
3) Ester
4) Ethane
5) Aldehyde
6) Amine
7) Alcohol
What are the organic compounds?Organic compounds are those compounds, which contain carbon-carbon and carbon-hydrogen bonds.
The five organic compounds are lipids, carbohydrates, protein, nucleotide, etc.
Thus, the correct option is 1) Carboxylic acid.
2) Ether
3) Ester
4) Ethane
5) Aldehyde
6) Amine
7) Alcohol
Learn more about organic compounds
https://brainly.com/question/5994723
#SPJ2
What is Technology mean?
Answer:
The branch of knowledge dealing with engineering or applied sciences is called technology .
Hope this helps you!
Someone plz help me :(
Answer:B
Explanation:
Because that vaccine can help from people dieing.
what is the difference between a base and an alkaline
Answer:
Base Alkali
1)All bases are not alkali 1)All alkali are bases
2)It neutralizes acids 2) It releases OH- ions, accepts a proton
3)Example: Zinc hydroxide, copper oxide 3)Example: potassium hydroxide, sodium hydroxide
A group of students conducted an experiment to determine the effect of heat on the germination(sprouting) of sunflower seeds. Which of the variables listed below is the least important to control in this experiment?
a
the temperature of which the seeds are heated
b
the length of time the seeds are heated
c
the type of soil used
d
the amount of moisture in the soil
what grade is this because apparently i like to know what grade it is before i solve it