The work (newton-metres) the dock worker have to exert to lift the boat to 5 m in air is 6506.85 Nm
What is work done?This is simply defined as the product of force and distance moved in the direction of the force. Mathematically, it can be expressed as
Workdone (Wd) = force (F) × distance (d)
Wd = Fd
How to determine the output work done Force (F) = 950 NDistance (d) = 5 mOutput work =?Output work = Fd
Output work = 950 × 5
Output work = 4750 Nm
How to determine the input work done Output work = 4750 NmEfficiency = 73%Input work =?Efficiency = (output / input) × 100
73% = 4750 / input
0.73 = 4750 / input
Cross multiply
0.73 × input = 4750
Divide both side by 0.73
Input work = 4750 / 0.73
Input work = 6506.85 Nm
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What is due to acids formed when atmospheric and volcanic gases mix with water. question 2 options: chemical weathering mechanical weathering root-pry pedalfer
Chemical weathering formed is due to acids formation when atmospheric and volcanic gases mix with water.
What is chemical weathering?Chemical weathering is a type of weathering that involved weakening and disintegration of rock by chemical reactions like acid reactions and so on. These reactions include oxidation, hydrolysis, and carbonation. These processes lead to formatiom or destruction of minerals, thus changing the nature of the rock's mineral composition.
Therefore, Chemical weathering is due to acids formed when atmospheric and volcanic gases mix with water.
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(Science)
(Quarter 4)
Solve the puzzle game's to have 5 point's
(BEGIN)
( •O•)!?
| |
| |
| |______|________
|________|_____ |
| |
(FINISH)
(real question)
can you know why Sam is nosebleeding
_ ~
(> ㅍuㅍ)>
Explanation:
because of blood pressure
giving brainliest please help!
Answer:
I am sure it is the reaction will shift right towards the
product
What can you infer about magnetic domains from the fact that they are arrangements of atoms?.
Explanation:
Q. What can you infer about magnetic domains from the fact that they are arrangements of atoms? The individual domains are extremely small.
In ferromagnetic materials, smaller groups of atoms band together into areas called domains, in which all the electrons have the same magnetic orientation. That's why you can magnetize them.An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.what are two basic properties of the gas phase
Answer:
It has no definite shape or volume.
Draw the product of the reaction. Draw any hydrogens on oxygen and nitrogen, where applicable.
The product of the reaction will be polar in nature due to the bonds formed between hydrogen and oxygen or nitrogen.
What is a product of a reaction?The product of a chemical reaction is the substance which is formed at the end of the reaction by the reactant or reactants.
The product of a reaction can be formed from the rearrangement of atoms in a compound due to changes in the environment of that compound.
The product can also be formed by the addition or removal of atoms of the reactants.
In the example above, no reactant is shown, however the bonds formed between hydrogen and oxygen or nitrogen gives polarity to the product formed.
Hence, a reactant must be present for a product to be formed.
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HELP PLS WILL GIVE BRAINLIEST AND THANKS
In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation.
2Al + 3Cl2 ==> 2AlCl3
a)Identify the limiting reagent for the reaction.
b)Calculate the number of moles or products formed
Answer:
you have school on Sunday?
How long would it take for a sound impulse to travel through an aluminum rod 1,500 meters long?
0.45 sec
4.5 sec
3.4 sec
0.29 sec
Answer:
As per Provided Information
Distance travelled by sound impulse through an aluminium rod is 1500 metres .
We have been asked to determine the time taken by the sound impulse to travel through aluminium rod .
As we know
Speed of sound in aluminium rod is 5100m/s .
Using Formulae
[tex] \boxed{\bf \: Time \: taken_{(Sound \: impulse)} = \cfrac{distance \: travelled \: by \: sound \: impulse}{speed \: of \: sound \: impluse}}[/tex]
Substituting the value and we obtain
[tex] \sf \qquad \longrightarrow \: Time \: taken_{(Sound \: impulse)} = \dfrac{1500}{5100} \\ \\ \\ \sf \qquad \longrightarrow \: Time \: taken_{(Sound \: impulse)} = \cancel\dfrac{1500}{5100} \\ \\ \\ \sf \qquad \longrightarrow \: Time \: taken_{(Sound \: impulse)} = 0.29 \: s[/tex]
Therefore ,
0.29 second sound impulse takes to travelled.So, your answer is 0.29 s .
Independent Assessment 1 Directions: Choose the correct concept about the occurrence of an earthquake and a volcanic eruption. Write only the letter of your answer in your activity notebook.
1. A. Tectonic earthquakes occur when rigid plates move because of a fault on the Earth's crust, while volcanic earthquakes occur when rigid plates move because of volcanism. B. Volcanic earthquakes occur when rigid plates move because of a fault on the Earth's crust, while tectonic earthquakes occur when rigid plates move because of volcanism.
2. A. Intensity measures the energy released at the source of the earthquake, while magnitude measures the strength of shaking produced by the earthquake at a certain location. B. Magnitude measures the energy released at the source of the earthquake, while intensity measures the strength of shaking produced by the earthquake at a certain location.
3. A. Seismogram is an instrument that measures the vibrations of the Earth during the shaking, while seismograph is a record of the ground motion at a measuring station as a function of time. B. Seismograph is an instrument that measures the vibrations of the Earth during the shaking, while seismogram is a record of the ground motion at a measuring station as a function of time. 4. A. Mount Mayon in Zambales erupted on June 1991 that its smoke and ashes reached the stratosphere. B. Mount Pinatubo in Zambales erupted on June 1991 that its smoke and ashes reached the stratosphere.
5. A. The violence of volcano eruption is determined by the ashes in the magma. B. The violence of volcano eruption is determined by the gases in the magma.
Pasagot nmn mga mare dyan.
Volcanoes and earthquakes occur due to movement of the Earth's tectonic plates.
How volcanoes and earthquake occur?Both volcanoes and earthquakes occur due to movement of the Earth's tectonic plates. They both occurs due to the heat and energy that is releasing from the Earth's core. Earthquakes can increase or fastens the volcanic eruptions through severe movement of tectonic plates.
Volcanoes eruption occurs when molten rock called magma rises to the surface. Magma is formed when the earth's mantle part melts due to higher temperature.
So we can conclude that volcanoes and earthquakes occur due to movement of the Earth's tectonic plates.
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Question 1 (8 points)
Name the following simple binary compounds.
1. NaBr =
2. KCl =
3. Mgo =
4. CaF2=
5. BaS =
6. Li20 =
7. NaF =
8. CS3N =
Answer:
Below
Explanation:
1. Sodium Bromide
2. Potassium Chloride
3. Magnesium Oxide
4. Calcium Fluoride
5. Barium Sulfide
6. Lithium Oxide
7. Sodium Fluoride
8. Cesium Nitride
Which two organisms are most likely to be competitors?
chipmunk, cow
snake, hawk
snake, badger
chipmunk, badger
Describe an experiment to determine rate of reaction
Answer:
Temperature. An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules.
3.0 Liters of gas at a pressure of 0.90 atm is compressed to 2.0 atm.
What is the new volume?
Answer:
5.5 L
Explanation:
explain any four effects caused due to exercise use chemical of chemical feritilizer on environment
Excessive use of chemical fertilizers has led to several issues such as serious soil degradation, nitrogen leaching, soil compaction, reduction in soil organic matter, and loss of soil carbon.
Hope it helps :)
Predict the species that will be reduced first if a mixture of molten salts containing the following ions undergoes electrolysis:
Zn2+, Mn2+, Na+, Al3+, Li+
Hint! You may need to consult the table of Standard Reduction Potential on the data sheet.
Answer: Zn2+
Explanation:
The standard reduction potential of the given species is as follows:-
[tex]\begin{aligned}&Z_{(aq)}^{2+}+2 e^{-} \longrightarrow {Zn}(\mathrm{s}) \quad E^{\circ}=-0.76 \mathrm{~V}\\&\mathrm{Mn}_{(\text {aq) }}^{2+}+2 e^{-} \longrightarrow \mathrm{Mn}(\mathrm{s}) \quad E^{\circ} = -1.03 \mathrm{~V}\\&\mathrm{Na}^{+}_{(\text {aq) }} + e^{-} \longrightarrow \mathrm{Na}\text{(s)} \quad E^{\circ}=-2.71 \mathrm{~V}\end{aligned}[/tex]
[tex]\begin{aligned}&\mathrm{Al}_{(\text {aq) }}^{3+}+3 e^{-} \longrightarrow \text {Al}\text{(s)}\quad E^{0}=-1.66 \mathrm{~V}\\&\mathrm{Li}^{+}(aq)+{e}^{-} \longrightarrow \mathrm{Li}\text{(s)} \quad E^{0}=-3.05 \mathrm{~V}\end{aligned}[/tex]
In the electrochemical series, the species having the lowest electromotive force—the lowest negative value—will be reduced first and the species having the highest negative value will be reduced last
Therefore, Zn2+ will be reduced first and Li+ will be reduced last
The reduction has been defined as the loss of electrons. The species of molten salt that reduces first has been zinc ion in electrolysis.
What is electrolysis?The electrolysis has been defined as the process of the ionization of the salt under the influence of the electric field.
The species with the lowest reduction potential will reduce first. The reduction potential of the following is:
Zinc ion = -0.76 VManganese ion = -1.03 VSodium ion = -2.71 VAluminum ion = -1.66 VLithium-ion = -3.05 VZinc has the lowest reduction potential and thus is the reduced first among the others.
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5
Julia made a model of a cell in a clear plastic zipper bag. She used a marble for the nucleus and pinto beans for mitochondria.
Which of the following options would be best for making her model more like a plant cell?
A. Take the marble out of the bag.
B. Put the bag inside a clear plastic box.
c. Take the pinto beans out of the bag.
D. Put the bag inside a larger clear plastic bag.
Reset
Submit
The option that would be best for making Julia model look more like a plant cell is putting the bag inside a larger clear plastic bag.
What is a cell?A cell is the basic and functional unit of life. Every living organism is made up of one or more cells.
However, a plant cell is morphologically different from an animal cell. One of the major differences is that a plant cell posseses a cell wall that protects the cell.
According to this question, Julia made a model of a cell in a clear plastic zipper bag. She used a marble for the nucleus and pinto beans for mitochondria.
Therefore, the option that would be best for making Julia model look more like a plant cell is putting the bag inside a larger clear plastic bag which will represent the cell wall.
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While on the scene of a very large explosion, you realize that you and your colleagues require additional wire mesh screens to collect evidence. What are you most likely sifting through?
A. Liquid found at the crime scene
B. Debris found at the crime scene
C. Dirt from footprints found at the crime scene
D. Vapors from the explosion
The individual is most likely sifting through the debris which is found at the crime scene.
What is Debris?This is defined as the scattered remains of something which has been broken down as a result of incidents such as an explosion.
The wire mesh is used as it helps to remove long fibers present at the crime scene which is taken for investigation.
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just pick the right option
Answer:
A
Explanation:
As CO₂ (carbon dioxide) depends on the air temperature, it is the dependent variableTherefore, air temperature is the independent variableThis is about the relation between carbon dioxide and air temperature, so the soil surface is not a variable to be consideredHELPPPPP
A sample of gas contains 6 mol in a 22 L flask at 238 K. What is the pressure of the gas in atmospheres?
The pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
Ideal Gas LawThe Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "pressure P times volume V is equal to moles times temperature and the universal gas constant. It is expressed;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).
Given the data in the question;
Amount of gas n = 6molVolume V = 22LTemperature T = 238KPressure P = ?We substitute our values into the expression above to determine the pressure of the gas in atmospheres.
PV = nRT
P = nRT / V
P = ( 6mol × 0.08206Latm/molK × 238K ) / 22L
P = 117.18168Latm / 22L
P = 5.33atm
Therefore, the pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
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Consider these equations:
2S (s) + 3O2 (g)→2SO3 (g), ΔH = −792 kJ
2S (s) + 2O2 (g)→2SO2 (g), ΔH = −594 kJ
2SO2 (g) + O2 (g)→2SO3 (g), ΔH =?
What is the missing ΔH?
a. −294 kJ
b. −198 kJ
c. +198 kJ
d. +294 kJ
Answer: (B) −198 kJ.
(40) If a hypothesis is proven correct, a theory is formulated.
True or false
Answer:
In scientific reasoning, a hypothesis is constructed before any applicable research has been done. A theory, on the other hand, is supported by evidence: it's a principle formed as an attempt to explain things that have already been substantiated by data.
Explanation:
Why is most space exploration
accomplished with spacecraft that do not have
crews on board?
Answer:
why is most space exploration accomplished with spacecraft that do not have crews on board? humans face many challenges in space. what is one advantage of using an orbiter to study objects in space? can be used for long periods of time.
What type of galaxy is most common?
Elliptical
Irregular
Lens
Spiral
What component of the human epidermis functions to make the skin's surface extremely tough and resistant to bacterial enzymes?
keratin
proteases
dermis
hypodermis
Answer:
Keratin :)
Explanation:
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Which of the following formulas should be classified as an acid?
O Na₂SO4
O NaHCO3
O NaOH
O H₂SO4
Answer:
D) H₂SO4 is an acid
Explanation:
Please mark branliest
H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.
What is an acid?Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.
The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid.
Therefore, the correct option is option D.
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State the functional groups that undergo cracking and substitution reaction.
Unsaturated organic compounds with a carbon-to-carbon double bond and alkynes with a carbon-to-carbon triple bond, as well as aldehydes and ketones with a carbon-to-oxygen double bond, undergo addition reactions.
How many pairs of autosomal chromosomes does each person without chromosomal abnormalities have?
a)46 pairs
b)22 pairs
c)23 pairs
d)45 pairs
Chromium (lII) sulphate reacts with potassium carbonate to form chromium (III) carbonate and potassium
sulphate.
Skeleton equation:
Answer:
Cr2(SO4)3+K2CO3---------------->Cr2(CO3)3+K2SO4
BALANCING
Cr2(SO4)3+3K2CO3------------------------->Cr2(CO3)+3K2SO4
Explanation:
If I have 21 moles of gas held at a pressure of 78 atm and a temperature of 901 K, what is the volume of the gas?
n this questions certain
a
r
e
g
i
v
e
n
,
of moles ,n = 21 mol, Pressure P = 78 atm, Temperature T = 900 K, Volume V = ?
We have to calculate the volume of the given moles of gas at specific temperature and pressure.
Using Ideal Gas equation;
PV = nRT
V = nRT /P ( R = gas constant = 0.08206 L atm
m
o
l
−
1
K
−
1
)
V= 21 mol x 0.08206 L atm
m
o
l
−
1
K
−
1
x 900K / 78 atm
V= 73.854 L atm / 78 atm = 0.946 L
how many moles of o2 would be required to produce 4 mol h2o?
Hii there !
The reaction accompanying production of water in this case would be -
[tex]\green{ \underline { \boxed{ \sf{2H_2+O_2\longrightarrow 2H_2O}}}} [/tex]
Thus ,by observing the reaction, we can conclude that 2 mole of Hydrogen [tex](H_2 )[/tex]react with 1 mole of oxygen[tex](O_2)[/tex]to produce 2 mole of water [tex](H_2O)[/tex]
Now,
To produce 1 moles of water.
Moles of Oxygen[tex](O_2)[/tex] required [tex] = \frac{1}{2}[/tex] moles
Similarly,
To produce 4 moles of water.
[tex]\implies[/tex] Moles of Oxygen[tex](O_2)[/tex] required = [tex]\frac{1}{2}\times 4[/tex] moles
[tex]\implies[/tex] 2 moles
Hope it helps.