2. Calculate how far light travels in 8.64 x
104 seconds. (Hint: The speed of light is
about 3,0 x 100 m/s.)
PEARSON
An atom has 17 protons And a mass number of 35 what is the name of this isotope in isotopic notation
Answer:
dsadsaddsadsadsadsdsdasdsa
Explanation:dsadasdasdasdasda
how does the difference in ignition temperature of fuel affect their use
#urgent ...pls
Answer:
Nuclear Fusion
The binding energy per nucleon curve (Figure 43.1) peaks at a nucleon number of about 56. This means that nuclei having A = 56 are more tightly bound than either less massive or more massive nuclei. Nuclear fission of nuclei with A ≈ 240 releases energy because the fragments have mass numbers closer to the A = 56 peak and are therefore more tightly bound. Nuclear reactions between light nuclei that produce more massive and more tightly bound nuclei also release energy.
which gas present in air has the highest boiling point
i need help on a CER
Answer:
Certified Emission Reductions (CERs) are a type of emissions unit (or carbon credits) issued by the Clean Development Mechanism (CDM) Executive Board for emission reductions achieved by CDM projects and verified by a DOE (Designated Operational Entity) under the rules of the Kyoto Protocol.
Answer:
A CER(S) stands for Claim, Evidence, Reasoning, (Science).
Explanation:
What is CER(S)?
The 1st part of CER(S) is a CLAIM. A claim is a simple, single sentence that answers a question. Your claim is a statement about what you believe to be true about that question. Your claim must be accurate, clear, and exact. Your claim should be the first sentence in your explanation. Your claim should ONLY answer the question – do not explain your answer at this point.
The 2nd part of CER(S) is EVIDENCE. The Evidence consists of data and/or results that can be used to support the claim. Evidence must be explicitly stated in sentence form and cannot merely be referenced. To adequately support a claim, the evidence must be appropriate (relevant to the question) and sufficient (enough provided to be convincing).
The 3rd part of CER(S) is the REASONING. The reasoning ties the evidence to the claim and explains why the evidence supports your claim. In this section, you discuss why the evidence that you provided is important and relevant to your claim.
The 4th and final part of CER(S) is the SCIENCE. Your teacher may not ask you to provide the supporting science for every CER(S) question – that is why the S is in parentheses. If you are asked to provide the science that supports your claim, then you need to discuss the relevant science and how it supports your claim.
Example of a CER(S)
Question: Use CERS to address the following question. “How does the length of a string affect the swing of a pendulum?”
Claim: As the length of the string increases, the time needed for a pendulum to make one complete swing increases.
Evidence: The time necessary for a pendulum to make one complete swing (back-and-forth) increases as the length of the string increases. When the string was 0.25 m the pendulum made a complete swing in 1.00 seconds. At each increase in length, there was a subsequent increase in time. When the string was 0.50 m the swing time was 1.42 seconds, at 0.75 m the time was 1.74 seconds, and at 1.00 m the time was 2.00 seconds.
Reasoning: My evidence supports my claim because it shows a clear direct relationship between the length of string and the time it takes for a pendulum to make one complete swing. There is a consistent increase in time as the length is increased, with no exceptions in our data. If our data are graphed, there is a distinct positive linear relationship between the variables with a slope of 1.33 sec/m. This slope indicates that for every additional meter of a string the time for one swing should increase by 1.33 seconds. This linear relationship should allow us to predict the swing time for any length of the string. This prediction could be tested, and if confirmed it would further support our claim.
Science: Our results make sense and would be expected based on Newton’s Law of Gravity and the concept of speed. According to the law of gravity, all objects fall at the same speed regardless of their masses. A swinging pendulum is essentially an object falling while attached to a string, so all pendula should fall at the same speed. The string of the pendulum causes the object to fall through an arc of a circle with the string serving as its radius. A longer string will have a longer radius, causing the object to swing through a larger arc. Objects moving at the same speed will cover the same distance at the same time but will require a longer time to travel a further distance. Since the pendulum with longer string swings through a longer arc it should take longer for it to make one complete swing. This relationship is exactly what we found in our results.
State and explain modern periodic table. ⊕⊕
Explanation:
the physical and chemical properties of an element are periodic functions of their atomic number.
Answer:modern periodic table is published by Henry Moseley and he believes that ' properties of an elements are periodic function of the atomic number' and he classify the periodic table by groups and perieods so in the modern periodic table there are seven periods and eighteen groups.
Some people rinse their freshly shampooed hair in diluted lemon juice or vinegar. Why is this done?
Answer:
the citric acid in lemon juice is a natural bleach, or oxidizing agent. It whitens hair by chemically reducing your hair's color pigment, or melanin. When exposed to the sun, the citric acid accelerates the bleaching process
The process of rinsing freshly shampooed hair in diluted lemon juice or vinegar significantly shines hair through the process of chemical reduction of hair color pigment that is known as Melanin.
What is the function of diluted lemon juice on hair?The function of diluted lemon juice is that the lemon juice remarkably consists the citric acid which is known as a natural bleach. It works as an oxidizing agent when it reacts with hair that contains a dark-colored pigment.
After performing the overall process, when your hair is directly exposed to the sun, it significantly enhances the process of bleaching which gives more shine to the hair. Vinegar balances the pH of your hair cleans out the hair shaft, and gives it a shine.
Therefore, the process of rinsing freshly shampooed hair in diluted lemon juice or vinegar significantly shines hair through the process of chemical reduction of hair color pigment that is known as Melanin.
To learn more about Lemon juice, refer to the link:
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A cup sits on a table. Due to its position, the potential energy of the cup is 3.00 joules. Ignoring frictional effects, if the cup falls off the table, how much kinetic energy will it have when it is halfway to the floor? a) 3.00 J b) 1.50 J c) 0.00 J d) cannot be determined without knowing the mass and the height of the cups
Answer: 1.50 J
Explanation:
Answer:
1.5 joules
Explanation:
Due to conservation of energy, half way the potential energy will be 1.5J so the remaining 1.5J is kinetic energy.
A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation.
Answer:
1 cm/s
Explanation:
From the question given above,
the student is trying to convert 0.010 m/s to a number in cm/s.
Thus, we can convert 0.010 m/s to cm/s as illustrated below:
Recall:
1 m/s = 100 cm/s
Therefore,
0.010 m/s = 0.010 m/s × 100 cm/s ÷ 1 m/s
0.010 m/s = 1 cm/s
Therefore, 0.010 m/s is equivalent to 1 cm/s
Which of these is a sign of salinization in crop plants?
A. Yellowing of leaves
B. Wilting of seedlings
C. Dead patches on leaves
D. Enlarged seedlings
Answer:
The correct answer I think is Wilting of Seeds
Explanation:
salinization is when the water evaporates and leaves behind the salt in the water. Which causes the seed to whither because salt sits in its roots, and leaves no way for any more water to get in. So it makes it hard for seedling so get water.
I think that is correct! Hope its right
A sign of salinization in crop plants is Wilting of seedlings. Thus the correct option is B.
What is salinization ?Increased salt percentage in the soil is known as salinization, and it is brought on by soluble substances in the water supply. The land may be flooded by seawater or saline groundwater flowing through the soil downward, depending on the source of the water.
Due to the poor plant growth circumstances caused by salinity, the ground surface is constantly moist and lacks vegetation. Lands become very prone to erosion as a consequence. The amount of salt on the soil's surface rises as a result of excessive irrigation owing to evaporation.
Saline soils cause crops to suffer because of high salinity stress, nutritional problems and toxins, poor soil physical conditions, and decreased agricultural output.
Therefore, option B is appropriate.
Learn more about salinization, here:
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How many significant figures are in this
measurement?
10.006 L
Answer: There are 5 significant figures in 10.006L
Explanation: Since there is a decimal point, all the digits after the decimal point also count as significant figures. Below is a key to help yu out:
Not Significant:
- Leading zeroes(in decimal): example- 0.0023= 2 sig figs
- Trailing zeroes with no decimal point: example- 2300= 2 sig figs
Significant:
- middle zeroes: example- 4003= 4 sig figs
-trailing zeroes with decimal point: example- 23.00= 4 sig figs
The density of gold is 19.3 g/cm3 and the density of lead is 11.4 g/cm3. If you have 5 grams of gold and 5 grams of lead, which will have the greater volume?
Given :
The density of gold is [tex]19.3 \ g/cm^3[/tex] and the density of lead is [tex]11.4\ g/cm^3[/tex] respectively .
To Find :
Which have greater volume .
Solution :
We know , density is given by :
[tex]\rho=\dfrac{mass}{volume}[/tex]
Now , volume of 5 gm gold .
[tex]Volume=\dfrac{mass}{\rho}\\\\Volume =\dfrac{5}{19.3}\ cm^3\\\\Volume =0.26\ cm^3[/tex]
Also , volume of 5 gm lead .
[tex]Volume=\dfrac{mass}{\rho}\\\\Volume =\dfrac{5}{11.4}\ cm^3\\\\Volume =0.44\ cm^3[/tex]
Therefore , volume of lead will be greater than gold.
Hence , this is the required solution .
Define monocarboxlic acid
Answer:
When a molecule has just has one carboxylic acid group, it is defined as a monocarboxylic acid.
Explanation:
hope it will help ^_^
What type of compounds are found in living things; always have carbon within them? (need answer quick)
Answer:
helping hand
Explanation:
dddeedehhhwuww
A climber trekked to the top of Mount Everest, elevation 29,035 ft. From a starting point of 24976 ft. In a time of 15 hr, 35 min. Determine the average rate of climb in:(a) miles per minute
Answer:
The average rate of climb in miles per minute is 8.2x10⁻⁴ miles/min.
Explanation:
The average rate can be calculated as follows:
[tex] \overline{v} = \frac{y_{f} - y_{0}}{t_{f} - t_{0}} [/tex]
Where:
[tex]y_{0}[/tex]: is the initial height = 24976 ft
[tex]y_{f}[/tex]: is the final height = 29035 ft
[tex]t_{0}[/tex]: is the initial time = 0
[tex]t_{f}[/tex]: is the final time = 15 hr, 35 min = 935 min
Then, the average rate of climb in miles per minute is:
[tex] \overline{v} = \frac{y_{f} - y_{0}}{t_{f} - t_{0}} [/tex]
[tex] \overline{v} = \frac{29035 ft - 24976 ft}{935 min - 0} = 4.34 \frac{ft}{min}*\frac{1 mile}{5280 ft} = 8.2 \cdot 10^{-4} miles/min [/tex]
Therefore, the average rate of climb in miles per minute is 8.2x10⁻⁴ miles/min.
I hope it helps you!
Convert 65 mi/hr to in/min
write the steps used for making tea by using the words: solution, solvent,solute,dissolve,soluble, insoluble, filtrate and residue.
answer
Answer:
Water is solvent and milk, tea powder and sugar is solute.
Explanation:
First take a specific mount of water in teapot which is a solvent and heat it for several minutes. After boiling of water, add 1 to 2 table spoon tea powder in water which is a solute and allow it for boiling. After that add milk and sugar according to your preference and tea is made which is a solution. The milk and sugar dissolve in the water but the tea powder did not dissolve so it can be filtrate with the help of filtration tool and all the residue trap at that tool while the tea is clean from all undissolved particles.
You are starting with 2 pounds of 30% acetic acid solution. You want to dilute
(water down) to make it a 15% solution. How many pounds of water do you have
to add? (HINT: calculate mass of solute in the 30% solution first)*
Answer:
The mass of water to be added is 2 pounds
Explanation:
The given parameters are;
The mass of the given solution = 2 pounds
The concentration of the given solution = 30%
The desired concentration of the solution = 15%
The mass, m of the acetic acid in the given solution = 30% × 2 pounds
m = 30/100 × 2 pounds = 0.6 pounds
To make a 15% acetic acid solution of acetic acid, the mass X of the required volume, is given as follows;
15% of X = 0.6 pounds
15/100 × X = 3/20 × 0.6 pounds
∴ The mass of the solution required X = 0.6 × 20/3 = 4 pounds
The mass of the solution that will contain 0.6 pounds of acetic acid giving a 15% acetic acid solution is 4 pounds
Therefore, the mass of water to be added to the original solution to make the a 15% acetic acid solution is 2 pounds.
what is chemical safety?
if I took two electrons (negatively charged particles) and tried to put them near each other, what would happen?
please solve this problem
Explanation:
ans b hcl and ccl4
both these compounds are formed by sharing of electrons......
Question 16 (2 points)
A scientist studies a model of a widely accepted theory about the position of planets and sun. The model would most likely help the scientist to
(2 points)
O a
prove that the theory would not change in the future
Ob
demonstrate how the theory can be changed into a law
Ос
understand facts which cannot be easily observed
Od
prove that all other facts about the universe are incorrect
Answer:
C I’m sure
Explanation:
how would you know if this combination is likely to be found in some dirt?
Answer:
very unlikely to be found in dirt
Explanation:
That combination has a ratio of ¹⁴N to ¹⁵N of 10:4 = 2.5: 1. The most ¹⁵N enriched natural material has a ratio of ¹⁴N to ¹⁵N on the order of 250 : 1 or higher. The combination shown is very unlikely to be found in dirt.
A sentence using the term pseudoscience
Answer:
His phraseology and his turns of invention are too empirically pseudoscientific for the simplicity of nature.
please answer this?
Answer:
I think the answer is no. 1
Explanation:
No specific explanation
How do the process of crabon cycle contribute to climate change.
Explanation:
Carbon that is a part of rocks and fossil fuels like oil, coal, and natural gas may be held away from the rest of the carbon cycle for a long time. These changes add more greenhouse gases in our atmosphere and this causes climate change.
Life has existed on Earth for about 3.8 billion years despite gradual and sudden environmental changes. How do the scientific factors of sustainability help explain how life has continued to survive and evolve?
Answer:
As we all are aware that life on Earth is existed due to several environmental changes and there are several scientific factors of sustainability that support the survival and evolution of life on Earth.
Scientific factors of sustainability include solar energy, chemical cycle, and biodiversity that supported life on Earth. solar energy helps all organism and especially producers to gain energy and store the energy which further used in chemical cycles of transferring energy to other trophic levels.
Chemical cycle also involves the interaction of biotic and abiotic envrionment with each other that leads to environmental changes as well as organisms adapt themselves accordingly.
Biodiversity maintains the balance in the ecosystem and prevent dominancy of one organism otherwise it can lead to scarcity and organism would not be able to survive. Variation in biodiversity due to random mating in the same species leads to evolution and produces new species of organisms.
Hence, scientific factors of sustainability play major role in survival and evolution of life on the Earth.
How many carbon Atoms does NaCI2 have
Answer:
Molecular formula is CaCl2 i.e. 1 atom of Ca and 2 atoms of Cl . Hence, molecular weight = 1 x 40 + 2 x 35.5 = 40 + 71 = 111 g / mol . But if you look at the weight online, it says 110.98 g / mol , which is close to 111
Explanation:
Hope this helped :)
Heat is the movement of thermal energy from one place to another. True or False
Answer:
True
Explanation:
Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature.
calculate and compare the chemical energy of coal to its gravitational potential energy. Burning 1 kg of coal releases about 3 million joules of energy. if you could use all of the chemical energy to lift another kilogram of coal, how could you lift it?
Answer:
Explanation:
chemical energy of 1 kg coal is 3 million joules .
If this energy is used to lift one kg of coal , let height attained be h
chemical energy = gravitational energy of 1 kg of coal
3 x 10⁶ = m g h = 1 x 10 x h
h = 3 x 10⁵ m
= 300 x 10³ m
= 300 km .
i kg coal can be lifted by height of 300 km .