Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of the balloon and the mass of the air it displaces. That is, if the balloon occupies the same volume as 10 kg of air, but the balloon only weighs 2 kg, then the balloon can lift 8 kg. gas densityH2 0.09 kg/m3He 0.18 kg/m3Air 1.23 kg/m3 Airships have sometimes been filled with hydrogen (H), but hydrogen is very flammable, and after the Hindenburg caught fire and crashed in 1937 with serious loss of life airships have nearly always been filled with helium (He) instead. Suppose a new airship Star of Balogna will have the shape of a cylinder 40. m long, with a radius of 4.0 m, and will weigh 750. kg without any gas inside it. Suppose also the average passenger weighs 80 kg. Calculate how many passengers the Balogna could carry if it were filled with hydrogen, and also if it were filled with helium. Passengers with Hz: 29Passengers with He: 26

Answers

Answer 1

Answer:

the Balogna could carry  19 passengers if filled with Hydrogen.

the Balogna could carry  17 passengers if filled with Helium.

Explanation:

Given that:

the radius of the cylinder r = 4.0 cm

the height h = 40 m

the volume of the cylinder will be:

[tex]V = \pi r^2 h[/tex]

V = π (4.0 m)² (40)

V = 2010.62 m³.

where the density of the air = 1.23 kg/m³

the mass of the displaced air = Volume V ×density of the air

= 2010.62 m³ × 1.23 kg/m³

= 2473.0626 kg

To calculate how many passengers the Balogna could carry if it were filled with hydrogen, we have the following:

We are given the density of H₂ to be = 0.090 kg/m³

Therefore, the mass of Helium in the balloon = Volume V × density of the hydrogen

= 2010.62 m³ × 0.090 kg/m³

= 180.9558 kg

The total mass of the balloon = mass of H₂ + mass of empty balloon.

The total mass of the balloon = (180.9558+ 750) kg

= 930.9558 kg

Now, the Mass difference = mass of the air displaced -total mass of the balloon.

the Mass difference =  (2473.0626 - 930.9558 ) kg

the Mass difference =  1542.1068 kg

number of persons = mass difference/ mass of passenger

the number of persons = 1542.1068 kg /80 (kg/person)

the number of persons = 19.27 persons

the number of passengers [tex]\simeq[/tex] 19 passengers.

To calculate how many passengers the Balogna could carry if it were filled with helium, we have the following:

We are given the density of Helium to be =  0.18 kg/m³

Therefore, the mass of Helium in the balloon = Volume V × density of the hydrogen

= 2010.62 m³ × 0.18 kg/m³

= 361.9116 kg

The total mass of the balloon = mass of Helium + mass of empty balloon.

The total mass of the balloon = (361.9116 + 750) kg

= 1111.9116 kg

Now, the Mass difference = mass of the air displaced -total mass of the balloon.

the Mass difference =  (2473.0626 - 1111.9116 ) kg

the Mass difference =  1361.151 kg

number of persons = mass difference/ mass of passenger

the number of persons =  1361.151 kg /80 (kg/person)

the number of persons = 17.01 persons

the number of passengers [tex]\simeq[/tex] 17 passengers.


Related Questions

Can I make it rain inside

Answers

Answer:

you use your sink and spray the little hose thingy and boom. or you can make it rain with mooney

Explanation:

no u can not make it rain in the house but if u want in the jar, here are the steps

Question: How can you make it rain indoors? 1) First, fill a glass jar with very hot tap water. 2) Then, flip the lid over and fill it with ice. ... In about 15 minutes you will see "rain" fall inside the jar .

hope this helped you

A 75.0 mL sample of water is heated to its boiling point. How much heat (in kJ ) is required to vaporize it?

Answers

Given :

A 75.0 mL sample of water is heated to its boiling point.

To Find :

The heat (in kJ ) is required to vaporize it .

Solution :

Heat of vaporization of water , [tex]\Delta H_{vap}=40.65\ kJ/mol[/tex].

Molar mass of [tex]H_2O[/tex] , [tex]M=18\ g/mol[/tex] .

Density of water , [tex]\rho=1\ g/ml[/tex] .

Mass of 75 ml of water sample , [tex]m=75\ g[/tex] .

Moles of 75 g water = [tex]\dfrac{75}{18}=4.17\ mol[/tex] .

Now , heat required to vaporize 4.17 mol of water :

[tex]H=4.17\times 40.65\ kJ\\\\H=169.51\ kJ[/tex]

Therefore , heat required to boil 75 ml sample of water is 169.51 kJ.

Hence , this is the required solution .  

Formulate a hypothesis about the stoichiometry of the reaction between NaCl and AgNO3.

Answers

Answer:

AgCl + NaNO3 would be the products of the reaction between sodium chloride and silver nitrate.

The stoichiometry of this reaction is written below, and it is because for this reaction to be fulfilled the products have to be in equilibrium with the reactants, since the mass in the reaction is conserved and must be balanced in the amount of molecules that they react to each other.

Explanation:

NaCl + AgNO3 -------------- AgCl + NaNO3

If a 250mL beaker weighs 13.473g and the same beaker plus 2.2 mL of water weighs 15.346g. How much does the 2.2 mL of water, alone, weigh? Show your work for the calculation. Be sure to use significant figures.

Answers

Given :

A 250 ml beaker weighs 13.473 g .

The same beaker plus 2.2 ml of water weighs 15.346 g.

To Find :

How much does the 2.2 ml of water, alone, weigh .

Solution :

Now, mass of water is given by :

[tex]\text{Mass of water alone = Total mass - Mass of beaker alone}\\\\Mass =15.346-13.473\ g\\\\Mass =1.873\ g[/tex]

Therefore , mass of 2.2 ml of water alone is 1.873 g .

Hence , this is the required solution .

when are larger atoms least likely to be reactive

Answers

Answer:

when they have eight valence electrons.

Explanation:

When atoms do not have a full valence shell, the atoms are more likely to react with other and vice versa.

Answer:

When they have a full shell of electrons

Explanation:

and or eight valence electrons

The efficiency of the wedge is low because of _____.

Answers

Answer:friction

Explanation:

Cobalt has the chemical symbol Co and the atomic number 27. How many protons, neutrons, and electrons would be found in an atom of cobalt-58?

Answers

Answer:

COBALT

Explanation:

CO BALT COBALT

why is the pull of gravity more at the poles than at than at the equator.​

Answers

Answer:

Why the gravitational force is greater near the poles and less at equator?

Gravitational force of Earth is minimum at equator because the centrifugal force at the equator is maximum.

Centrifugal force is an outward force exerted on a body revolving in a circular path, to mantain its state of motion.

Explanation:

Here Earth revolves around its axis and the same forces act on it to enable its revolution.

Gravitational force at the equator is less because Centrifugal force, which is also acting at the equator cancels out the Gravitational force to an extent. Whereas at poles, there is no such effect of centrifugal force because earth is sphere (bulged at center; flat at poles )and hence gravitational force is maximum at poles.

The other reason is distance from any place on equator to centre of earth is more than at poles. Because Earth is bulged at centre and flat at poles. Since Gravitational force is given by

F= GMm/ r^2 ; r is the distance between two bodies.

In order to calculate how many neutrons are in an atom, you must subtract the mass number from the number of protons? Neutrons = Mass # - Protons Question 6 options: True False

Answers

Answer:

True.

Explanation:

The mass number of an atom can be calculated using no of protons and the no of neutrons.

Mass number = no of protons + no of neutrons

We can rearrange the above formula to find the no of neutrons as follows :

no of neutrons = Mass number - no of protons

or

Neutrons = Mass - protons.

Hence, the given statement is true.

What is the relationship between grams and cm³? ​

Answers

Answer:

1 gram

Explanation:

1 gram= weight of 1 cubic centimeter of pure water at temperature 4°C = 1000 milligrams = 0.001 kilogram

Pick the compound with the highest boiling point in each pair. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.1. For the pair of compounds CO2 or NO2 the one with the highest boiling point is __________ . 2. For the pair of compounds NH3 or CH4 the one with the highest boiling point is _________ 3. For the pair of compounds CS2 or CO2 the one with the highest boiling point is _________

Answers

Answer:

1) NO2

2) NH3

3) CS2

Explanation:

CO2 is a nonpolar molecule owing to the fact that the two opposing dipoles in the molecule cancels out. Hence its primary intermolecular forces are the weak dispersion forces. How ever NO2 is polar and its molecules are held together by dipole-dipole interaction this makes the boiling point of NO2 greater than that of CO2

NH3 exhibits hydrogen bonding since nitrogen is far more electronegative than hydrogen. However, CH4 is nonpolar and the only intermolecular forces present are weak dispersion forces. This accounts for the fact that NH3 has a greater boiling point than CH4.

The boiling point of a compound also depends on its molecular mass. CS2 has a greater boiling point than CO2 due to the fact that CS2 has a larger molecular mass. The both compounds- CO2 and CS2 has exactly the same kind of intermolecular forces present between their molecules- the weak dispersion forces.

Which one of the following properties is NOT a chemical property? (5 points)

a
Density

b
Flammability

c
Heat of combustion

d
Reactivity

Answers

Answer:

a

Explanation:

Density is a physical property.

4. In a chemical process, you need to force a compound to bond with a halogen, causing it to lose hydrogen. Which type of reaction do
you need to perform?
A. Halogenation
B. Hydrolysis
C. Reduction
D. Ammoniation​

Answers

Answer:

Halogenation

Explanation:

Halogenation is a type of substitution reaction in which a hydrogen atom is replaced by a halogen atom in a molecule.

The molecule looses its hydrogen atom as the halogen is introduced into the molecule. This sort of reaction is very common in organic chemistry. Many hydrocarbons can be halogenated in the presence of light.

1. Isotonic saline requires a concentration of 0.85% NaCl. How much solid NaCl must be weighed out on the balance to prepare a bottle full containing 3500 ml?

Answers

Given :

Concentration of NaCl , [tex]c=0.85 \%[/tex] .

To Find :

Th amount of solid NaCl must be weighed out on the balance to prepare a bottle full containing 3500 ml .

Solution :

Concentration of NaCl is 0.85 % .

It means , 0.85 gm of NaCl in 100 ml of water .

So , amount of solid NaCl required to prepare 3500 ml solution is :

[tex]x=\dfrac{3500\times 0.85}{100}\ gm\\\\x=29.75\ gm[/tex]

Therefore , amount of solid NaCl required is 29.75 gm .

Hence , this is the required solution .

The sun supplies about 1.0 kilowatt of energy for each square meter of surface area (1.0 kW/m^2 where a watt = 1 kJ/s) Plants produce the equivalent of about 0.20g of sucrose (C_12H_22O_11) per hour per square meter. Assuming that the sucrose is produced as follows, calculate the percentage of sunlight used to produce sucrose12CO2 (g) + 11H2O (I) --> C12H22O11 + 12O2(g) deltaH = 5645 kJ

Answers

Answer:

0.092 %

Explanation:

The equation of the reaction can be computed as :

[tex]12CO_2_{(g)} + 11H_2O_{(l)} \to C_{12}H_{22}O_{11} + 12O_{2_(g)}[/tex]

[tex]\Delta H = 5645 \ kJ[/tex]

recall that; the number of moles = [tex]\dfrac{mass}{molar \ mass}[/tex]

By applying the method of enthalpy of combustion for sucrose at the same time changing the time from hours to seconds, we can determine the total energy output.

i.e

[tex]=\dfrac{0.20g \ of \ sucrose }{m^2 \ 3600 \ s}\times \dfrac{1 \ mol}{342.34 \ g}\times 5.645 kJ/mol[/tex]

[tex]= 9.16 \times 10^{-4} \ kJ/m^2 s[/tex]

Given that the sun supplies about 1.0 kilowatt, to KJ/m² s, we have:

[tex]1.0 \dfrac{kW}{m^2 }= 1.0 \dfrac{kJ}{m^2 s}[/tex]

Finally, the percentage of sunlight used to produce sucrose :

= [tex]\dfrac{9.16 \times 10^{-4} \ kJ/m^2 \ s}{1.0 \ kJ/m^2 . s} \times 100\%[/tex]

= 0.092 %

Characteristics of this mineral: sheet-silicate mineral with one dominant direction of cleavage (breaks into flakes and sheets), thin sheets are silvery gray and partially transparent, does not effervesce.

Answers

Answer: The mineral you are describing is Muscovite Mica

I hope that this helps you !

The Characteristics of the mineral should be Muscovite

What is Muscovite?

It is also known as the common mica, etc. It comprises of potassium & almunium. It should be the most common member of the mica group. It is considered as the mineral that contains one dominant direction of cleavage split into the flake & sheets, Also, due to the perfect cleavage, it can arise in thin, transparent, and the durable sheet.

Therefore, The Characteristics of the mineral should be Muscovite

learn more about mineral here: https://brainly.com/question/21864372

The mass percentage of hydrochloric acid within a solution is 28.00%28.00% . Given that the density of this solution is 1.1411.141 g/mL, find the molarity of the solution.

Answers

Answer:

8.76M

Explanation:

Given that

Mass from the density = 1141g

According to the given situation the computation of molarity of the solution is shown below:-

we will took HCL solution which is 1000mL

HCl = 28% by mass

So,

Mass of HCl in 1-litre solution is

[tex]= \frac{28}{100} \times 1141[/tex]

Which gives the result of molar mass HCI is

= 319.48g /mol

Now,

Molarity is

[tex]= \frac{319.48}{36.45}[/tex]

Which gives results of molarity is

= 8.76M

please help asap will give brainiest What is the independent variable in an experiment? A) The variable that remains the same throughout the experiment. B) The variable being tested in the experiment. C) The variable being measured in an experiment.

Answers

A because if it remains through the whole expídeme y the same the it doesn’t depend on anything else to change it and I got it correct

What are ions exactly?
Are atoms with an incomplete outer valence shell called ions?

Answers

Answer:

An ion is a charged atom or molecule. It is charged because the number of electrons do not equal the number of protons in the atom or molecule. ... When an atom is attracted to another atom because it has an unequal number of electrons and protons, the atom is called an ION.

Explanation:

what is the name of the salt with the structure K2S

Answers

Potassium sulphide :)

Processes are always spontaneous when ________ ( H and S refer to the system).

Answers

Answer:

Explanation:

A spontaneous chemical process is one in which product formation is favoured under the specified conditions. A spontaneous process yields the product without an external input of energy.

A spontaneous reaction will always occur when ∆H is negative and ∆S is positive. These are the signs of enthalpy and and entropy change that gives rise to a spontaneous chemical process at all temperatures. Recall that a spontaneous process is one in which ∆G<0.

Increasing temperature can

Answers

Answer:

increases reaction rates

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

If a dog has a mass of 21.5kg, what is his mass in the following units?
What is the dogs mass in gram?
What is the dog mass in mg?

Answers

Answer: 21.5kg in grams is 21,500 grams

21.5kg in mg is 215,000,00

Explanation:

One dose of a liquid medication is 2.5 tablespoons. If a patient takes a dose of this medication four times a day for a week, how many milliliters of this medication is consumed in one week? (1 tbsp = 15 mL)

Answers

Answer:

1050 mL

Explanation:

Step 1: Given data

Dosage of the liquid medication: 2.5 tablespoons (tbsp)

Times that the patient takes the medication: 4 times a day for a week

Step 2: Calculate the number of times the patient takes the medication

We will use the relationship 1 week = 7 days.

[tex]1 week \times \frac{7days}{1week} \times \frac{4dose}{1day} = 28 dose[/tex]

Step 3: Calculate the number of tablespoons

We will use the relationship 2.5 tbsp/1 dose.

[tex]28dose \times \frac{2.5tbsp}{1dose} = 70tbsp[/tex]

Step 3. Convert 70 tbsp to mL

We will use the relationship 1 tbsp = 15 mL.

[tex]70tbsp \times \frac{15mL}{1tbsp} = 1050 mL[/tex]

A hybrid car holds 32 gallons of gas in its tank. If it travels from San Diego to Seattle in three tanks of gas, and gas costs $3.29 per gallon, about how much did the trip cost? Report your answer with three significant figures.

Answers

3 tanks of gas->32*3->96 gallons in total.

96*3.29->315.84

3 sig. figs. -> $315

Draw two five carbon rings that share an atom.

Answers

Here’s the steps to do this & then a photo! Hope this helps!


Draw your electron rings. The circle with the "C" is a representative nucleus, so now you'll need to indicate the electron orbitals. The number of rings you need is to tied to the number of electrons you have. Carbon has 6 electrons. Since each ring has a maximum number of electrons that can be pictured, you'll have to do some math. The first ring can have a maximum of 2 electrons, the second ring a maximum of 8, the third ring a maximum of 18, etc. Carbon has 6 electrons, so you'll need to draw two concentric rings.
Draw your electrons. You can do this a couple different ways. Some people just draw circles on the rings and fill them in. In this case, you would draw 2 on the first ring and 5 on the second ring. The best way to draw electrons is to draw them as circles with minus signs inside. This indicates not only that they are electrons, but helps remind the viewer that electrons contain a negative charge.

Denaturation of a protein is always permanent.
A. True
B. False

Answers

Answer:

A. True

Explanation:

This process usually cannot be reversed and will lead to the protein being permanently damaged.

I need help with this chemistry question talking about pure substances and mixtures?

Answers

The correct answer is A. The sample is not a heterogeneous mixture

Explanation:

A heterogeneous mixture includes two or more materials and these are not completely integrated. Due to this, in most cases, if a heterogeneous mixture is filtered it is possible to separate its parts. This did not occur when Ben filtered the substance, which shows it is likely the substance is not a heterogeneous mixture. Moreover, a heterogeneous mixture does not show uniformity in terms of appearance or properties, which shows this definitely not heterogenous and Ben can safely conclude this.

which of the following tools can be used to measure mass? A.a graduated cylinder B. a triple beam balance C. a mercury thermometer D. a bathroom scale

Answers

Answer:

triple beam balance

Explanation:

The tool that can be used to measure mass is a triple beam balance. Therefore, the correct option is option B.

A graduated cylinder is used to determine a liquid's volume. A mercury thermometer is used to measure temperature. Weight is calculated on a bathroom scale and is a force rather than a mass. A typical scientific tool for calculating an object's mass is a triple beam balance.

It is composed of three beams with moveable weights that enable precise mass balancing and a pan on one end where the thing to be measured is placed. By comparing the placement of the weights on the beams to the appropriate scale, the mass of the object can be ascertained.

Therefore, the correct option is option B.

To know more about mass, here:

https://brainly.com/question/11954533

#SPJ6

an engineering team is conducting a trial launch of a few rocket . which part is the engineering process is the team in ?

Answers

Answer:

Evaluate the result (Apex)

Explanation:

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