Answers
Answer:
a = 2m/s²
Explanation:
Given data:
Mass of sofa = 150 Kg
Force applied = 300 N
Acceleration = ?
Solution:
Formula:
F = ma
F = force
m = mass
a = acceleration
by putting values,
300 N = 150 Kg × a
a = 300 N /150 Kg
a = 300 Kg m/s² / 150 Kg ( N = Kgm/s²)
a = 2m/s²
Related Questions
which of the following compounds, on reaction with aqueous sodium hydroxide, yields sodium butanoate, CH3CH2CH2CO2Na, at the slowest rate ? A) (CH3CH2CH2C), O B) CH3CH2CH2COCH, CH,CH2CH2CNIL II D) CH3CH2CH2COH AA B. B c. C D D
Answers
B. CH3CH2CH2COCH3 yields sodium butanoate, CH3CH2CH2CO2Na, at the slowest rate.
Upon reacting with aqueous sodium hydroxide, the compound CH3CH2CH2COCH3 will yield sodium butanoate (CH3CH2CH2CO2Na), but at the slowest rate. This is because this compound contains an ether functional group, which has a much higher bond energy than the other compounds, making it harder to break down and therefore react more slowly.
Additionally, the carbon-oxygen double bond makes it difficult for the hydroxide ions to attack, further slowing down the reaction. This makes CH3CH2CH2COCH3 the compound that yields sodium butanoate at the slowest rate.
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Lewis Dot Structure for Argon in the ground state?
Answers
Answer:
You take Argon's symbol (Ar) and place two dots above it, two below it, and two on each side to for a box of circles around it.
Explanation:
since it is a noble gas it has 8 valence electrons therefore there has to be 8 dots total around its symbol
The Lewis dot structure for argon (Ar) in the ground state is represented by the symbol "Ar" surrounded by eight dots, which symbolize the valence electrons. The image is attached below.
A Lewis dot structure is a visual representation of the valence electrons in an atom or molecule. It uses dots or other symbols to represent the outer shell electrons, also known as valence electrons.
The Lewis dot structure is based on the octet rule, which states that atoms tend to gain, lose, or share electrons to achieve a stable configuration of eight valence electrons. The arrangement of valence electrons determines the chemical properties and reactivity of an atom or molecule.
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What is the identity of a cation solution that burns in a flame test with a mix of red and yellow, but viewed through a cobalt filter the flame is red?
Answers
The identity of a cation solution that produces a mix of red and yellow colors in a flame test, but appears red when viewed through a cobalt filter, can be attributed to the presence of the strontium (Sr) cation.
During a flame test, different metal cations emit characteristic colors due to the excitation of electrons and their subsequent emission of light. Strontium, in particular, is known to produce a vibrant red color in flame tests.
The presence of both red and yellow colors indicates the possibility of multiple metal cations in the solution. While the specific metal responsible for the yellow color is uncertain, it could potentially be sodium or another metal that emits a yellow flame.
When the flame is viewed through a cobalt filter, which absorbs yellow wavelengths of light, the yellow color is filtered out, resulting in only the red color being observed. Since strontium is known for its distinctive red flame color and its emission is not affected by the cobalt filter, it is likely the metal cation responsible for the observed red color. Therefore, based on these characteristics, the identity of the cation solution is most likely strontium (Sr).
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B. A beaker containing 250 cm³ of aqueous solution freezes at -2.21°C. The density of the solution is 1.37 grams/cm³. If the solution is 72.1 % by weight water, what is the molecular weight of the solute in the solution?
Answers
Explanation:
What is biology definition
russia has a variety of natural resources, including oil, natural gas, timber, iron ore, copper, and lead.
Answers
The compound sentence is Russia has a variety of natural resources such as oil, natural gas, timber, iron ore, copper and lead as well.
A compound sentence is a sentence that is formed from two more simple sentence by using the connective words.
For an example if sentence 1 is "It is raining" and sentence 2 is "It is cold" then the compound sentence of both the above sentences will be "It is raining and it is cold".
Now, Russia has a variety of natural resources, including oil, natural gas, Timber, iron ore, copper and lead.
This statement is a simple sentence.
This statement can be return as a compound sentence as follows,
Russia has a variety of natural resources such as oil natural gas and lead as well.
Here, we have used the word "such as" as a connective.
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Complete Question - Russia has a variety of natural resources including oil, natural gas, timber, iron ore, copper and lead (change into compound sentence)
Which of the following is true about the efficiency of energy transfer in an ecosystem?
a The more energy the organism requires, the more efficient the energy transfer.
b. All energy transfers have the same efficiencies.
C. The less energy the organism requires, the more efficient the energy transfer.
d. The most efficient energy transfers are in large, warm-blooded animals.
Please select the best answer from the choices provided
A
B
ОООО
C
D
Mark this and return
Save and Exit
Next
Submit
Answers
Answer:
C. The less energy the organism requires, the more efficient the energy transfer.
Answer:
C
Explanation:
Trust the process
Edge 2021
Question 1 (Worth 3 points)
(02.04 MC)
The diagram shows four different locations in an atom.
A shaded circle is shown, labeled nucleus. Two small points labeled two and three are shown inside this shaded circle. A lighter shaded concentric circle is shown with a radius more than double the radius of the inner circle. A point labeled one is shown inside a section of this circle which does not overlap with the inner circle. A flower petal like shaded region is shown above and below these circles. A point labeled four is shown inside the lower petal.
Which locations are likely to have subatomic particles with the least mass?
1 and 2
2 and 3
1 and 4
3 and 4
Answers
Answer:
answer C) 1 and 4
Explanation:
Answer:
C) 1 and 4
Explanation:
I took the test. Hope this helps!
Which of the following are peninsulas in Southeast Asia?
A.
the Miramar Peninsula and the Tasmanian Peninsula
B.
the Indochinese Peninsula and the Malay Peninsula
C.
the Philippine Peninsula and the Vietnam Peninsula
D.
the Irrawaddy Peninsula and the Mekong Peninsula
Answers
Answer:
B.
Explanation:
Answer:
B
Explanation:
NEED HELP ON QUESTION ASAP! !
If answer is correct I'll rate you five stars a thanks and maybe even brainliest!
Please can you explain what this paragraph is trying to say. Also what does it mean in the sentence 'the difference in charge across the battery provides push for current' and what is the difference in charge.
Here's paragraph I need to have a simple definition of:
A high waterfall is also like a large voltage. It will transfer a lot of energy to the water (charge), making the river flow very fast (a large current) the difference in height makes the river flow. In a circuit , the difference in charge across battery provides push for the current.
Answers
A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.
Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.
For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.
The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.
Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.
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How many grams ofNaOH are needed toprepare 275 mL of1.2 M solution?
Answers
The first step we have foolow is to convert mL to L and multiply it by the molarity of the solution:
\(275mL\cdot\frac{1L}{1000mL}\cdot\frac{1.2mol}{L}{}=0.33mol\)Use molar mass of NaOH to find the mass of NaOH is:
\(0.33mol\cdot\frac{40gNaOH}{mol}=13.33gNaOH\)It means that the correct answer is 13 grams.
-Convert 6.02 x 1020 formula units of MgCl₂ to mol of MgCl₂:
Answers
6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.
Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.
Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:
(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))
The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:
(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol
Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.
Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.
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The pH at the Half-equivalence point of a weak base - strong acid tritation is:
A. Equal to pka
B. Equal to pKb
C. Less than 7.0
D. Equal to 7.0
E. Greater than 7.0
Answers
Answer:
Less than 7
Explanation:
during the titration of strong acid and weak base, the weak base is usually kept in the flask and strong acid is kept in the burette. So when we add strong acid slowly drop by drop, slowly the pH level of solution starts to decrease and at equivalence point the acid overpowers the base as a strong acid was taken over a weak base.
Н
HOH
14
Н-С-С-С-Н
I
ННН
List the number of each atom in the formulas above:
H
НН Н
Н-С-С-С-О-Н
LI
НН Н
DONE
Н Н
H
Н-С-С-О-С-Н
II
Н Н
H
Answers
Answer:
Explanation:
It seems like you’re trying to count the number of atoms in some chemical formulas. Here’s the list of the number of each atom in the formulas you provided:
Formula 1: Н - 1 Formula 2: H - 1, O - 1 Formula 3: Н - 14 Formula 4: Н - 2, C - 3 Formula 5: I - 1 Formula 6: Н - 3 Formula 7: H - 2 Formula 8: Н - 2, C - 3, O - 1 Formula 9: Li - 1 Formula 10: Н - 2 Formula 11: Н - 2 Formula 12: H - 1 Formula 13: Н - 2, C - 2, O - 1 Formula 14: II
Are the following Endothermic or Exothermic?
1. Water begins to boil
2. Fireworks explode
3. Sweat evaporates cooling your skin
4. Water begins to freeze into ice
5. You ignite your homework
assignments once the year is over.
6.Sunrays burn your skin
7.Cellular respiration
Answers
1. Water begins to boil - Endothermic
2. Fireworks explode - Exothermic
3. Sweat evaporates cooling your skin - Endothermic
4. Water begins to freeze into ice - Exothermic
5. You ignite your homework assignments once the year is over - Exothermic
6.Sunrays burn your skin - Exothermic
7.Cellular respiration - Exothermic
What is Exothermic and Endothermic?Exothermic and endothermic refer to two types of chemical reactions or physical processes that release or absorb energy, respectively.
Exothermic reactions release energy in the form of heat, light, or sound. When these reactions occur, they produce a net release of energy into the surroundings, which can often be felt as an increase in temperature. Examples of exothermic reactions include combustion, oxidation, and many types of explosions.
Endothermic reactions, on the other hand, absorb energy from the surroundings in order to proceed. These reactions typically feel cold to the touch and require energy to be added to the system in order to occur. Examples of endothermic reactions include melting, evaporation, and many types of chemical reactions that require heat to be added in order to proceed.
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Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH. The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C. The results of the experiment are represented in Figure 1. One of the researchers proposes using oxygen gas production to measure reaction rates. Which of the following statements best justifies the use of the proposed modification as a way of creating an appropriate control for the investigation?
O the experiment can be repeated without hydrogen peroxide, which will help eliminate an uncontrolled variable. O the experiment can be repeated without hydrogen peroxide, which will help eliminate an uncontrolled variable. O the experiment can be repeated without peroxidase, which will introduce a second independent variable. O the experiment can be repeated without peroxidase, which will introduce a second independent variable. O the experiment can be repeated without guaiacol, which will reveal the effect of guaiacol on the reaction rates. O the experiment can be repeated without guaiacol, which will reveal the effect of guaiacol on the reaction rates. O the experiment can be repeated without water, which will reveal whether the reaction can occur inside a living cell.
Answers
In studying the influence of environmental pH on peroxidase activity, researchers can repeat the experiment without guaiacol, which will reveal the effect of guaiacol on reaction rates.
The proposal to use the production of gaseous oxygenOne of the investigators' proposal to use oxygen gas production to measure reaction rates leads to a change in the dependent variable.
In the first experiment the dependent variable was the volume of guaiacol and in the second experiment the dependent variable will be oxygen production.
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please help me with Chem I ONLY HAVE 5 MINUTES if methane gas (CH4) flows at a rate of 0.25L/s, how many grams of methane gas will there be in a room after 1 hour of time has passed?
Answers
Answer:
643g of methane will there be in the room
Explanation:
To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -Assuming STP-. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:
Volume Methane:
3600s * (0.25L / s) = 900L Methane
Moles methane:
PV = nRT; PV / RT = n
Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP
Replacing:
PV / RT = n
1atm*900L / 0.082atmL/molK*273.15 = n
n = 40.18mol methane
Mass methane:
40.18 moles * (16g/mol) =
643g of methane will there be in the roomNerve impulses are picked up by a neuron’s:
(1) dendrites
(2) axon
(3) synapse
(4) neurotransmitter
Answers
PLEASE HELP ITS A TESTT!!
Answers
Answer:
D
Explanation:
What's galactose's empirical formula?
Answers
Answer:
C6H12O6
Explanation:
C6H12O6
How many mL of 0.626 M NaOH solution are needed to obtain 0.332 mol of NAOH?
Answers
Any time we are working with solutions and its molar concentration we will use the equation:
\(C=\frac{n_{\text{solute}}}{V_{\text{solution}}}\)Where C is the concentration, n is the number of moles of the solute and V is the volume of solution.
We can identify such situations when we are working with molarity, molar concentration, solutions with concentration in "M" or "mol/L" units and other cases.
In this case, we can see that we are working with these three quantities:
- We want the volume in mL os a solution, V.
- We have a molar concentration, C, 0.626 M NaOH.
- We have a number of moles of solute we want to get, n, 0.332 mol of NaOH.
So, we have:
\(\begin{gathered} V_{\text{solution}}=\; \text{?} \\ C=0.626M=0.626mol/L \\ n_{\text{solute}}=0.332mol \end{gathered}\)So:
\(\begin{gathered} C=\frac{n_{\text{solute}}}{V_{\text{solution}}} \\ V_{\text{solution}}=\frac{n_{\text{solute}}}{C}=\frac{0.332mol}{0.626mol/L}=0.530351\ldots L=530.351\ldots mL\approx530mL \end{gathered}\)So, the volume we need is approximately 530 mL.
How many molecules are in 24 grams of ozone (03)
Answers
Answer:48
Explanation:
Answer: 3. 0.125 X 10”23 molecules
Explanation:
what type of rock was on earth first
Answers
Answer:the Acasta gneisses
Explanation:
Which among the following represents a set of isotopes? Atomic nuclei containing:
a) 20 protons and 20 neutrons
b) 21 protons and 19 neutrons
c) 22 neutrons and 18 protons
d) 20 protons and 22 neutrons
e) 21 protons and 20 neutrons
Answers
Answer:
d. 20 protons and 22 neutrons
Atomic nuclei containing 20 protons and 22 neutrons. Thus, option D is correct.
What is an electron?
An electron is defined as a subatomic particle which is charged negatively either bound to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.
The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.
The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.
Therefore, Atomic nuclei containing 20 protons and 22 neutrons. Thus, option D is correct.
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How does body temperature, energy level, and water level affect a person’s ability to survive?
Answers
What volume do of 2.0 M HNO3 is needed to neutralize 40.0ml of 5.0 m NaOH
Answers
100 mL of 2.0 M HNO3 is needed to neutralize 40.0 mL of 5.0 M NaOH.
To determine the volume of 2.0 M HNO3 needed to neutralize 40.0 mL of 5.0 M NaOH, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between HNO3 and NaOH.
The balanced chemical equation for the reaction is:
HNO3 + NaOH → NaNO3 + H2O
From the balanced equation, we can see that the stoichiometric ratio between HNO3 and NaOH is 1:1. This means that 1 mole of HNO3 reacts with 1 mole of NaOH.
First, let's calculate the number of moles of NaOH in 40.0 mL of 5.0 M NaOH:
moles of NaOH = volume (in L) × concentration (in M)
moles of NaOH = 0.040 L × 5.0 M = 0.2 moles
Since the stoichiometry is 1:1, we know that 0.2 moles of HNO3 are required to neutralize 0.2 moles of NaOH.
Now, let's calculate the volume of 2.0 M HNO3 needed to provide 0.2 moles of HNO3:
volume of HNO3 = moles of HNO3 / concentration (in M)
volume of HNO3 = 0.2 moles / 2.0 M = 0.1 L or 100 mL
Therefore, 100 mL of 2.0 M HNO3 is needed to neutralize 40.0 mL of 5.0M NaOH.
It's important to note that during the neutralization reaction, the reaction goes to completion. However, in practice, it is recommended to add the acid slowly and carefully while continuously monitoring the pH to ensure complete neutralization and avoid over-titrating.
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Multiple Choice
Which of the following statements explain how
this experiment relates to the cycling of
matter?
Elodea uses water and carbon dioxide to
produce glucose and oxygen. The snail
uses glucose and oxygen and produces
water and carbon dioxide.
Elodea uses light, oxygen and water to
produce glucose. The snail eats the
elodea and releases carbon dioxide as a
waste product
The snail performs photosynthesis which
C releases carbon dioxide into the
atmosphere.
Nitrogen-fixing bacteria remove ammonia
D from the testube and increases dissolved
oxygen.
Answers
Answer:
Explanation:
B
39. Analyze What subscripts would you most likely use if
the following substances formed an ionic compound?
(Need help with this last question and it’s the only one I ask help for but teacher doesn’t want to help me)
Answers
Based on their valencies, the subscripts of the ionic compounds formed will be:
1 and 12 and 11 and 22 and 2What subscripts would you most likely use if the following substances formed an ionic compound?A. An alkali metal and a halogen.
An alkali metal and a halogen both have valencies of one.
Therefore the subscripts would be 1.
B. An alkali metal and a non-metal from group 16.
An alkali metal has a valency of 1 and a group 16 non-metal has a valency of 2.
By exchange of valencies, the subscript would be 2 and 1.
C. An alkaline earth metal and a halogen.
An alkaline earth metal has a valency of 2 and a halogen has a valency of 1.
By exchange of valencies, the subscripts would be 1 and 2.
D. An alkaline earth metal and a non-metal from group 16.
An alkaline earth metal has a valency of 2 and a non-metal from group 16 has a valency of 2.
By exchange of valencies, the subscripts would be 2 and 2.
Therefore, the subscripts of the ionic compounds formed will be:
1 and 12 and 11 and 22 and 2Learn more about about valency at: https://brainly.com/question/2284519
What type of minerals make up more than 90% of the earth's crust?
sulfites
silicates
stalagtites
hematites
Answers
Answer:
Rocks
Explanation:
Answer:
silicate
Explanation:
Ensure you write the states of the reactants and products.
• phosphoric acid reacts with magnesium hydroxide
Answers
What does water vapor do to the density of the air
Answers
Answer:
The amount of water vapor in air influence density. Water vapor is relatively light compared to diatomic Oxygen and diatomic Nitrogen - the dominant components in air. When vapor content increases in moist air the amount of Oxygen and Nitrogen are decreased per unit volume and the density of the mix decreases since the mass is decreasing.
Explanation: