Answer:
True.
Explanation:
Question: Children in a tree house lift a small dog in a basket 3.95 m up to their house. If it takes 221 J of work to do this, what is the combined mass of the dog and basket?
Express your answer using three significant figures.
Answer: M = ? kg
The combined mass of the dog and the basket is equal to 5.71 Kg.
What is work?Work can be described as the energy used when applying a force to move an object through a definite displacement.
The work done by a force to move an object through a displacement can be represented as:
W = F.dcosθ
Where θ is angle between displacement and force.
Given, the height the basket lifted up, d = 1.4 m
The angle between force and displacement, θ = 0°
Thus, the work done when lifting the basket is:
W = F d cosθ
W = mg.d cosθ
W = mg.d cos0°
m = W/gd
m = 221/(9.8).(3.95)
m = 5.71 Kg
Therefore, the mass of the basket and dog is equal to 5.71 Kg.
Learn more about work, here:
brainly.com/question/13662169
#SPJ1
The atomic weight of element A is 88.7 if the element consist of two Isotopes that have mass number 88 and 92. what is the approximate % natural abundance of the heaviest Isotope?
Answer: 17.5 %
Write the equation for relative Atomic mass in terms of an ( 'a' being one isotope's mass) and solve for x:
88.7 = [tex]\frac{(a * 88) + ((100 - a) * 92)}{100}[/tex]
8870 = 88*a + 9200 - 92 * a
4*a = 330
a = 82.5
Find the value of b using a,
100 - a = b
100 - 82.5 = b
b = 17.5
So, the % abundance for the isotope with mass number 88 is 82.5% and the % abundance for the isotope with mass number 92 is 17.5% .
To learn more about natural abundance,
https://brainly.com/question/13187634
For Silicon atoms, which I value will show exceptionally large increase over preceding IE values IE1, IE2, IE3, IE4, IE5, IE6
The ionization energy of the fifth electron IE5 would be exceptionally large.
What is the exceptionally large ionization energy?We know that the ionization energy is the energy that is required to remove an electron from an atom. This is the energy that must be supplied in order to make the electron to be able to escape the attractive force of the nucleus of the atom.
We know that Silicon has four electrons in the outermost shell. It is known that electrons that are in the same shell would have relatively close values of ionization energy.
The ionization energy values IE1, IE2, IE3, IE4 all belong to the outermost shell hence we would have an exceptionally large increase over preceding IE values at IE5.
Learn more about ionization energy:https://brainly.com/question/28385102
#SPJ1
What is the solubility of MgCO₃ in a solution that contains 0.055 M Mg²⁺ ions? (Ksp of MgCO₃ is 3.5 × 10⁻⁸)
The solubility of MgCO₃ in a solution that contains 0.055 M Mg²⁺ ions is 6.36 * 10⁻⁷.
What is the solubility of a solution?The solubility of a solution is the amount of solute present in a given volume of solvent.
The solubility of MgCO₃ in a solution that contains 0.055 M Mg²⁺ ions is calculated from the dissociation equation for the reaction given below:
MgCO₃ (s) → Mg²⁺ (aq) + CO₃²⁻ (aq)The solubility product constant, Ksp = [Mg²⁺] * [CO₃²⁻]
At equilibrium, [Mg²⁺] = 0.055 + x
[CO₃²⁻] = x
Assuming x is <<< 0.055, hence 0.055 + x = 0.055
Ksp = 0.055 * x
x = Ksp / 0.055
x = 3.5 × 10⁻⁸ / 0.055
x = 6.36 * 10⁻⁷
Hence, the solubility of MgCO₃ = 6.36 * 10⁻⁷
Learn more about solubility at: https://brainly.com/question/24124376
#SPJ1
The preexponential and activation energy for the diffusion of iron in cobalt are 1.1 × 10−5 m2/s and 253,300 J/mol, respectively. At what temperature will the diffusion coefficient have a value of 2.1 × 10−14 m2/s?
The temperature is obtained as 1517 K.
What is the temperature?We know that we asked here to find the temperature at which we are going to have a diffusion coefficient of 2.1 × 10−14 m2/s. Let us look at the following from the question;
D = diffusion coefficient = 2.1 × 10−14 m2/s
[tex]D_{o}[/tex] = pre-exponential constant = 1.1 × 10−5 m2/s
[tex]E_{a}[/tex] = Activation energy = 253,300 J/mol
R = Gas constant = 8.314 J/mol.K
T = temperature = ??
Then;
log D= log [tex]D_{o}[/tex] - Ea/2.303RT
log(2.1 × 10−14) = log( 1.1 × 10−5) - 253,300/2.303 * 8.314 * T
log(2.1 × 10−14) / log( 1.1 × 10−5) = - 253,300/2.303 * 8.314 * T
T = - 253,300/-8.719 * 2.303 * 8.314
T= 1517 K
Learn more about diffusion coefficient:https://brainly.com/question/14921285
#SPJ1
How many moles of argon are in 24.2 g of argon?
24.2 g of Argon has 0.6057 moles in it.
We know that the number of moles in a given mass of an element can be calculated by using the formula
⇒ No. of moles = [tex]\frac{Mass of the element }{Molar mass of the element}[/tex] (i)
Here, the mass of the element Argon = 24.2 grams (ii)
The molar mass of Argon is = 39.948 a.m.u. (iii)
Using the values for the molar mass and mass of the element (ii and iii), we get
⇒ [tex]\frac{24.2}{39.948}[/tex]
⇒ 0.6057 moles present in the given mass of Argon.
Therefore, there are going to be 0.6057 moles in 24.2 g of Argon which is given.
Learn to know more about moles on
https://brainly.com/question/26416088
The autoionization of water is a reversible reaction.
2H₂O ⇌ H3O⁺ + OH⁻
This reaction is endothermic (ΔH is positive).
What is the effect of increasing temperature of water on:
The numerical value of Kw
Answer 1
Choose...
pH
Answer 2
Choose...
[H3O+ ]
Reaction will move forward and favor according to Le Chatelier's principle on increasing temperature of water.
According to Le Chatelier's principle, the position of equilibrium will shift if a system in a state of dynamic equilibrium is disturbed by a change in its conditions. The point of equilibrium will shift toward the products to offset the additional reactant if you raise the concentration of one of the reactants. For instance, extra N2 will react with H2 in the system if it is added. More ammonia will be produced as a result of this.
Similar to this, the location of equilibrium would move to the left if you reduced the concentration of one of the reactants. In this instance, removing N2 would cause more NH3 to break down into the reactants.
To know more about Le Chatelier's principle visit https://brainly.com/question/2001993
#SPJ1
thsof
is which acid H2S04
Explanation:
H2So4=sulphuric acid , strong acid
why do different types of matter have different requirements to phase change?
Different types of matter have different requirements because the pressure and temperature of a substance's environment dictate its phase.
Matter is anything that occupies space and has mass. The states or phases of matter include solids, liquids, gases, and plasma. Any material in a form that has a distinct shape and volume is referred to as a solid. Phase change refers to a shift in the condition of matter. Phase shifts can be carried out by people and occur frequently in nature.
A set of molecules will experience various movements, such as vibrations, rotations, and translations, depending on the average temperature in their vicinity.
To know more about the States of matter, refer to this:
brainly.com/question/20348735
Choose the colder temperature.
A) -30°F
B) 20°F
[tex]-6.66^{0} C[/tex][tex]-30.4^{0} C[/tex]Between the two options, the option A shows the colder temperature, that is [tex]-30^{o}[/tex] F.
How to determine the colder temperature?
Both Fahrenheit and Celsius employ different temperatures as the water's freezing and boiling points, as well as differing sizes for their degrees. While water freezes at zero degrees Celsius and boils at one hundred degrees C, it does so at 32 degrees Fahrenheit and two hundred and twenty degrees F, respectively. You can see that although Fahrenheit has 180 ° between the freezing and boiling extremes, Celsius has 100 degrees. The difference between one degree Celsius and one degree Fahrenheit is 1.8.
On converting [tex]-30^{o}[/tex] F to Celsius we get, [tex]-30.4^{0} C[/tex]
and on converting [tex]20^{o} F[/tex] to Celsius, we get, [tex]-6.66^{0} C[/tex]
Hence, we can say [tex]-30.4^{0} C[/tex] is colder temperature than [tex]-6.66^{0} C[/tex].
To know more about temperature scale, visit:
https://brainly.com/question/1373930
#SPJ1
points)
1. In part 1, you collected data about how the amount of sugar affects the amount of gas produced.
Analyze those data and draw a conclusion. (20 points)
a. Wnat gas inflated the balloons? (2 points)
Since carbohydrates are essential biomolecules the action of sugars fluctuates when enzymes consume substrates of glucose molecules.
Gas pressure is the pressure created by the collision of gas particles with an object. Inside the balloon, gas particles collide with the inner wall of the balloon. It's these collisions that keep the balloon inflated. When carbon dioxide gas fills the balloon, it inflates. The more gas produced, the bigger the balloon will inflate.
The chemical reaction between baking soda and vinegar will inflate the balloon as long as the baking soda and vinegar react. Force Balance: The pressure inside the inflated balloon is greater than the pressure outside. The balloon is stable because the expansion force due to the pressure difference balances the contraction force due to the surface tension of the rubber.
Learn more about Gas inflated here:-https://brainly.com/question/27859084
#SPJ1
724.4g of ammonium phosphate in 4500 mL of alcohol. what is the molarity?
The molarity of the 724.4g of ammonium phosphate in 4500 mL of alcohol is 1.0804m.
Ammonium phosphate [tex]$\Rightarrow\left(\mathrm{NH}_4\right)_3 \mathrm{PO}_4$[/tex]
GMM of Ammonium Phosphate [tex]$\Rightarrow 109 \mathrm{~g}+40 \mathrm{~g}$[/tex] [tex]$\Rightarrow 149 \mathrm{~g}$[/tex]
No. of moles of Ammonium Phosphate [tex]$\Rightarrow\left\{\frac{724.4}{149}\right\} \Rightarrow 4.8$[/tex]
Molarity = 4.86/4.5 = 1.0804m.
Phosphates are low in toxicity, however they create nutrient contamination and nourish algae. Eutrophication and hazardous algal blooms result as a result of this. Many countries, notably the European Union and the United States, have outlawed the use of phosphates in detergent.
To learn more about Molarity visit:https://brainly.com/question/8732513
#SPJ9
0.620 L of a 2.6 MKCl solution Express your answer using two significant figures.
The number of moles in 0.620 L of a 2.6M KCl solution is 1.61 moles.
How to calculate number of moles?Molarity is the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.
The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume as follows:
no of moles = molarity × volume
According to this question, 0.620 L of a KCl solution has a molarity of 2.6 M. The number of moles of the substance is as follows:
no of moles = 2.6M × 0.620L = 1.612moles
Therefore, 1.61 moles is the number of moles in the pottasium chloride solution.
The incomplete question is as follows:
Determine the number of moles contained in 0.620L of a 2.6 M KCl solution.
Learn more about moles at: https://brainly.com/question/16386473
#SPJ1
How many grams of NCI3
are in 4.00 moles of NC13?
The mass of NCl3 in 4.00 moles of NCl3 is 481.44 grams
Mole is defined as the amount of the substance containing the same number of discrete entities (atoms, molecules, ions, etc) as there are atoms in a sample of pure 12C weighing exactly 12g. The number of particles present in one mole of any substance =Avogadro Number=6.
The formula for number mole is given as:
Number of moles = Mass of the substance ; Now substituting the values
Molar mass
⇒ 4.00 = x [Molar mass of NCl3 = 120.36]
120.36
⇒ x = 4.00 × 120.36
⇒ x = 481.44 grams
Therefore the mass of NCl3 is 481.44 grams
To know more about mole concept
https://brainly.com/question/23059935
#SPJ1
Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution.
C₅H₅NHI
The equation that shows that the salt is acidic is;
C₅H₅NHI + [tex]H_{2} O[/tex] -----> C₅H₅N + [tex]H_{3} O^+[/tex] + [tex]I^-[/tex]
Is the salt acidic?We know that when we dissolve certain salts in water, the salts could form an acidic, basic or a neutral solution depending on the kind of interaction that the salt could have with the solvent.
Looking at the salt C₅H₅NHI, we can see that the salt can interact with water so as to form the acid that is called hydro iodic acid as shown by the equation; C₅H₅NHI + [tex]H_{2} O[/tex] -----> C₅H₅N + [tex]H_{3} O^+[/tex] + [tex]I^-[/tex]
Learn more about acid salts:https://brainly.com/question/14091731
#SPJ1
Name one thing that we use in everyday life that uses either a magnetic field or an electric field.
A common thing in everyday life that uses the magnetic field or an electric field is the transformer.
What is a magnetic field?The term magnetic field is the region that is around a magnet where there is a the influence of a magnetic. Also, the region around a charge where the influence of the charge can be felt is called the electric field.
Most of the devices that we have at home do have a transformer such as a radio set and a television set. The transformer that is in this appliance causes the regulation of voltage in the appliance.
The transformer works on the principle of the magnetic field and the electric field.
Learn more about magnetic field:https://brainly.com/question/14848188
#SPJ1
425 L of chlorine at 32° C will occupy what volume at -15° C while the
pressure remains constant?
502.4 L
185.2 L
O 199.2 L
359.5 L
*
2 points
According to the solution 359.5 L volume at -15° C while the pressure remains constant.
What kind of force is pressure?The definition of force in physics is The push or pull on a massed object alters its velocity. An external factor is an agent that has the power to alter the resting or moving condition of a thing. It has a path and a magnitude.
Briefing:Initial volume of chlorine gas = 425 L
Initial temperature = 32°C
Final volume = ?
Final temperature = -15°C
Solution
Initial temperature = 32°C (32+273 = 305 K)
Final temperature = -15°C (-15 +273 = 258 K)
The Charles Law will be used to resolve the presented issue.
This equation states that at constant pressure and molecular number, the volume of a given amount of a gas is precisely proportional to its temperature.
V₁/T₁ = V₂/T
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
We will now enter the values into the formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 425 L× 258 K /305 K
V₂ = 109650 L.K / 305 K
V₂ = 359.5 L.
To know more about Pressure visit:
https://brainly.com/question/356585
#SPJ13
classification of Sulfur Dioxide
Sulfur Dioxide, (SO2), is an inorganic compound, a heavy colorless poisonous gas.
Sulfur dioxide has a pungent, irritating odor, familiar as the smell of a just-struck match. It is produced in huge quantities in an intermediate setup. Occurring in nature in volcanic gases and in solution in the waters of some warm springs, sulfur dioxide usually is prepared industrially by the burning in air or oxygen of sulfur or such compounds of sulfur as iron pyrite or copper pyrite.
In the atmosphere, it can combine with water vapor to form sulfuric acid, a major component of acid rain. In the laboratory the gas may be prepared by reducing sulfuric acid (H2SO4) to sulfurous acid (H2SO3), which decomposes into water and sulfur dioxide, or by treating sulfites (salts of sulfurous acid) with strong acids, such as hydrochloric acid, again forming sulfurous acid.
Sulfur dioxide can be liquefied under moderate pressures at room temperatures; the liquid freezes at −73° C (−99.4° F) and boils at −10° C (14° F) under atmospheric pressure. Although its chief uses are in the preparation of sulfuric acid, sulfur trioxide, and sulfites, sulfur dioxide also is used as a disinfectant, a refrigerant, a bleach, and a food preservative, especially in dried fruits.
Molecular Formula: SO2
Molecular Weight: 64.07
To know more about Sulfur Dioxide:
https://brainly.com/question/7072447
Which force slows a skateboard when a skateboarder puts a foot down to brake?
O motion
O gravity
O friction
O inertia
Answer:
It is definitely friction
What is the density of an object that has a mass of 6.2 g and a volume of 4.4 mL ?
Density=mass/volume
d=6.2/4.4
d=1.40 grams/cm³
Question
Seismic waves travel at different speeds according to type.
What is the speed of seismic waves from fastest to slowest?
Responses
S waves, L waves, P waves
S waves, L waves, P waves
P waves, S waves, L waves
P waves, S waves, L waves
L waves, S waves, P waves
L waves, S waves, P waves
P waves, L waves, S waves
Since Seismic waves travel at different speeds according to type, the speed of seismic waves from fastest to slowest is option C: P waves, S waves, L waves.
Which seismic waves are moving more quickly?P waves leave the earthquake first and go the furthest. Rock oscillates perpendicular to the direction of wave propagation in S or shear waves. In rock, S waves typically move at a pace of roughly 60% that of P waves, and they always come after the latter.
Therefore, if we examine a seismogram, we anticipate that the P-wave, which is the quickest wave, will arrive first, followed by the S-wave and then the Love and Rayleigh waves, which are the slowest waves.
Learn more about Seismic waves from
https://brainly.com/question/18956633
#SPJ1
Identify 2 ways you can change gravitational on an on an object ?
The area of human activity that consumes the most energy is____.
a. transportation
b. building construction and operation
c. industrial manufacturing
d. heavy engineering and infrastructure
The area of human activity that consumes the most energy is building construction and operation. Option B.
Humans impact the physical environment in many ways including overpopulation pollution burning fossil fuels and deforestation. Such changes are causing climate change soil erosion declining air quality and undrinkable water. Human geography includes the study of all human activities and their effects on the natural environment.
The impact of early human societies on the natural environment was minimal due to the presence of a small number of nomads, mainly through hunting, fishing, and gathering. The human activity system is a fictitious system that represents goal-oriented human activity. These systems are fictitious in the sense that they are intelligent constructs and do not describe actual real-world activities.
Learn more about Human activity here:-https://brainly.com/question/25213840
#SPJ1
how to increase rate of the reaction "nitrogen with hydrogen"
The reactants' concentration needs to be raised.
What factors influence rate of reaction?
The rate of the reaction controls how quickly the chemical reaction moves forward. The reaction's rate is influenced by a number of variables. These elements are:
(i) The concentration of the reactant: As the reactant concentration rises, the reaction rate does as well.
(ii) The reactant's nature. The condition, reactivity, or solution type of the reactants all have an impact on the reaction's pace.
(iii)The pressure of the gases: As the pressure of the gases involved in a reaction rises, so does its rate.
(iv) The surface area of the solids—As exposed surface area increases, so does the rate of reaction.
Therefore, if we to speed up the process, she should raise the reactant concentration since the more reactant molecules there are, the more molecules will actually collide, which will enhance the rate of the reaction.
To learn more about reaction rate, click on link below
https://brainly.com/question/12904152
#SPJ1
I need help with #5 please. thank you
Answer:
Atom 3
Explanation:
Because it has electronic configuration of 10 which it is an atomic number of neon. And neon is a gas which is stable, hence does not react
For this experiment, various solutions were compared to look for precipitation or bubbling. What is the independent variable in the experiment?
A. the precipitates or bubbles
B. all the solutions
C. only the pickle crisp and vinegar
Answer:
A
Explanation:
Independent variable: the surface of the slope rug, bubble wrap and wood
For this experiment, various solutions were compared to look for precipitation or bubbling. The precipitates or bubbles are the independent variable in the experiment. Therefore, option B is correct.
What is precipitation ?The term precipitation is defined as a solid produced by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid.
A substance separated from a solution or suspension by chemical or physical change, usually as an insoluble amorphous or crystalline solid.
A compound may precipitate when its concentration exceeds its solubility. This can be caused by temperature changes, solvent evaporation, or solvent mixing. A strongly supersaturated solution precipitates more quickly.
Independent variable are the surface of the slope rug, bubble wrap and wood.
Thus, option B is correct.
To learn more about the precipitation, follow the link;
https://brainly.com/question/18109776
#SPJ2
what has the biologist Rahul Kumar came to India to find
It is to be noted that Rahul Kumar the biologist came to India to find problems that he can solve using his knowledge in Biology.
Who is Rahul Kumar?Rahul Kumar, an Indian and the son of a migrant worker from Bihar, graduated with honors from IIT Roorkee and is currently on his way to the United States to pursue his PhD at the University of Utah.
A biologist is a scientist who undertakes biological study. Biologists are interested in researching all forms of life on Earth, whether they be single cells, multicellular organisms, or communities of interacting individuals. They often specialize in a single field of biology and have a specialized research emphasis.
The majority of biologists work full-time at government agencies, private research laboratories, medical testing facilities, higher education institutions, or other research facilities.
Physician's assistants, radiation and nuclear medicine technologists, and registered nurses are among the hospital employment available to those with a bachelor's degree in biology. These positions can also be found in clinics, physicians' offices, nursing homes, rehabilitation institutions, government organizations, the military, and other settings.
Learn more about biologist:
https://brainly.com/question/14887111
#SPJ1
Evaluate the following summaries and choose the one that best describes metals, nonmetals, and metalloids.
A)
Metals are liquids, good conductors, and melt at low temperatures. Nonmetals are solid, poor conductors, and low in density. Metalloids are very heavy, shiny, good conductors, and have very high densities.
B)
Metals are generally very shiny, good conductors, high in density, and melt at high temperatures. Nonmetals are generally dull, poor conductors, low in density, and melt at low temperatures. Metalloids exhibit properties of both metals and nonmetals, make fair conductors, and can appear as shiny or dull.
C)
Metals are usually very shiny, high in density, and poor conductors. Nonmetals are great conductors, dull, and very dense. Metalloids are the heaviest of all elements, solid, and melt at low temperatures.
D)
Metals are usually dull, low in density, and melt at low temperatures. Nonmetals are usually very shiny, high in density, and good conductors of electricity. Metalloids are generally very shiny, solid, and melt at very high temperatures.
The correct summary of the properties is; Metals are generally very shiny, good conductors, high in density, and melt at high temperatures. Nonmetals are generally dull, poor conductors, low in density, and melt at low temperatures. Metalloids exhibit properties of both metals and nonmetals, make fair conductors, and can appear as shiny or dull.
What are the classifications of materials?Materials are of course composed of matter and mater is composed of atoms of elements. There are three main classes of the elements that we have in the periodic table. The classes of the elements are known as;
1) Metals
2) Non metals
3) Metalloids
Metals do conduct electricity while the non metals just do not conduct electricity. The metalloids would acts as conductors of electricity under certain circumstances.
Learn more about metals:https://brainly.com/question/28650063
#SPJ1
What is the oxidation number of an element
Solid potassium (K) conducts an electric current, whereas solid potassium iodide (KI) does not
because a. solid potassium is a nonmetal
b. solid potassium has a delocalized sea of electrons and KI has its cations and anions
too close together
c. KI has covalent bonds
d. Kl needs to be reacted with another compound first
Solid potassium (K) conducts an electric current, whereas solid potassium iodide (KI) does not because solid potassium has a delocalized sea of electrons and KI has its cations and anions.
How does potassium iodide work?Positively charged potassium and negatively charged iodine combine to form the straightforward inorganic ionic chemical potassium iodide. It is solid at room temperature and resembles sodium chloride or table salt in terms of crystalline structure.
The major uses of potassium iodide are to treat hyperthyroidism and as a dietary supplement for those who are iodine deficient. Additionally, it is utilized as an expectorant to treat asthma and other long-term respiratory disorders, as well as to shield the thyroid gland from radiation.
When potassium iodide is dissolved in water, it splits into cations and anions, enabling free electron movement across the solution. It does not conduct electricity when it is in a dry crystal state, though, like other ionic compounds.
To know more about potassium iodide, visit:
https://brainly.com/question/12050170
#SPJ13
