Rank the crystal lattice structures in order of decreasing efficiency of space in the structure.

20,691 results, page 36

chemistry

rank these amino acid from most polar to least: His, Phe, Ser, Ile, Asp, Trp i don't think my answer is correct... Ser>Asp>His>Phe>Trp>Ile

physics

The engine of a large ship does 2.05 multiplied by 108 J of work with an efficiency of 4.00%. (a) How much waste heat (J) is produced? (b) How many barrels of fuel are consumed, if each barrel produces 6.00 multiplied by 109 J of heat when burned?

Chemistry II

The following general reaction was found to be first-order with respect to A and second-order with respect to B: A + B ---> products What would the rate of this reaction be in terms of k in a one liter vessel containing 4 moles of A and 7 moles of B?

Algebra

Sue, an experienced shipping clerk, can fill a certain order in 5 hours. Jim, a new clerk, needs 12 hours to do the same job. Working together, how long will it take them to fill the order?

English

I vary the last sentence. Could you check it please? In conclusion, he says that though the populations of many marine species are decreasing very quickly, people have not been aware of the problems with ocean wildlife because these species are not visible.

Physical Science

When you do 100 J of work on the handle of a bicycle pump, the pump does 40 J of work pushing the air into the tire. What is the efficiency of the pump?

physics

an engine pumps of 100 kg of water through a height of 10m in 5 second. Given that the efficiency of engine is 60%. If g=10m/s^2 the power of engine is

math

The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r1−γ , where γ is a constant. Find γ for e = 0.55 and r = 7.5.

Chemistry

Using molymods make 2 ring structures of glucose and join them through a condensation reaction between carbon 1 on one molecule and carbon 4 on the other. What molecule is formed through this procedure?

science physics solar

In state-of-the-art crystalline silicon solar cells technology, based on p-type silicon, a back surface field (BSF) is implemented. This BSF is implemented, because in this way: The barrier for hole collection at the back contact is reduced, increasing the surface ...

biology

What role does the lilac flower play in its natural ecosystem? What is its niche in the food web Are there any ecological issues surrounding the lilac flower(e.g. are its populations decreasing, is it spreading uncontrollably..)

Math

In this 2x3 grid, each lattice point is one unit away from its nearest neighbors. A total of 14 isosceles triangles(but not right triangles), each with an area of ½u squared have only two vertices that are one unit apart in the grid. how many such half-unit triangles have at ...

bio

The most common protein secondary structures (the alpha helix and beta conformation) are stabilized primarily by A. ionic bonds B. hydrogen bonds C. disulfide bonds D. van der Waals interactions E. hydrophobic interactions

Chemistry

I am struggling in naming alkanes,alkenes,... How do you determine the parent chain? I know it is the longest chain,but there are structures that look quite complicated....the branched ones are counted...!!!! I am so confused on determining the correct parent chain!!!!!! ...

algebra 1b

Solve the problem by stating the equation you would use to solve and then solving it. After receiving discount of 12.5% on its bulk order of printer paper, johns office supply pays $3200 . what was the price of the order before the discount ? round to the nearest dollar. in

MATH

a baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filed out from the remaining members and a batting order will be set. How many possible betting orders can be made?

History

What reason was given to the federalists to support the constitution? A, strong government to establish economic stability**? B, strong government to maintain control over all its states. C, to define state boundaries. D, in order to pass laws to bring law and order to the ...

algebra

If a is not = to b then the order pair (a,b) is always equal to the ordered pair of (b,a) i am thonking it will never be equal am i correct Never. Order is important, defining unique values.

easy math

Troy can order a large or small snow cone. There are 16 flavors and 2 toppings from which to choose. How many ways can Troy order a snow cone? 120 64 32 30 Is it 64 or 32 what do I do?

physics

a pump fills a tank of capacity 300 m^3 in 5 hours.the tank is situated at a height of 20 m.if the efficiency of the tank is 65%. then calculate the power of the engine which has driven the pump.

Math natural logarithms

The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r^(1−γ) , where γ is a constant. Find γ for e = 0.55 and r = 7.5

Algebra 1

Which of the following equations best represents the function for the situation "an initial population (P) of 1,400 people decreasing by 5% per year (x)"? p=1,400-5x p=1,400(0.05)^x p=1,400(0.95)^x p=1,400/5x

Financial Management

Coogly Company is attempting to identify its weighted average cost of capital for the coming year and has hired you to answer some questions they have about the process. They have asked you to present this information in a PowerPoint presentation to the company’s management ...

physics

A typical photovoltaic cell delivers 3.8×10−3 {\rm W} of electric energy when illuminated with 0.14 {\rm W} of light energy. what is the energy efficiency of the cell?

physics

A certain heat engine does 8.0 kJ of work and dissipates 8.00 kJ of waste heat in a cyclical process. (a) What was the heat input to this engine? (b) What was its efficiency?

physics

A certain heat engine does 8.0 kJ of work and dissipates 8.00 kJ of waste heat in a cyclical process. (a) What was the heat input to this engine? (b) What was its efficiency?

Physics

A heat engine absorbs 126 kcal of heat and exhausts 77 kcal of heat in each cycle. Calculate the efficiency (as a percentage)

Physics

A heat engine absorbs 126 kcal of heat and exhausts 77 kcal of heat in each cycle. Calculate the efficiency (as a percentage)

Physics

A heat engine absorbs 126 kcal of heat and exhausts 77 kcal of heat in each cycle. Calculate the efficiency (as a percentage)

Chemistry

I'm sorry I'm just really confused by ionization energies and the heat of formation. Could you explain how to set up this problem? Use the data (kJ) for ionization energies, electron affinities and heats of formation to find the lattice energy of Fe3O2(s) according to the ...

physics

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10–31kg; and the neutron mass is 1.67 × 10–27 kg. I know ...

Communication Studies

What is a movie that shows an example of gender miscommunication? Are these characters on the margins of society, as depicted in the film, or are portrayed in a stereotyped way or as people who can be more honest because they are "marginal" people, those not co-opted into the ...

Physics

A 6090kg space probe mobing nose-first toward Jupiter at 105m/s relative to the Sun, fires its rocket engine ejecting 80 kg of exhaust at a speed of 253 m/s relative to the space probe. What is the final velocity of the probe? I should have gotten 108m/s Can you show me the ...

business

Identify areas of vagueness and ambiguity and discuss how you might clarify the e-mail message using the writing principles addressed in the text. Below Hi class, I don’t have a lot of time to explain but off the top of my head answer is as a reader critical thinking affects...

Chem AP!!! please help!!!!

Select all that follow the trends of lattice energy: BaO > KF 1. Fluorine is more electronegative than oxygen. 2. The ions in BaO are +2 and -2; whereas in KF they are +1 and -1. 3. The atomic radii of Ba and O are smaller than those of K and F. 4. The ions in KF are +2 and...

Computer programming?

What is jsp structures regrading to computer programming?

math

paul's pizza is having a sale on mozza melts.each order of mozza melts costs $0.99 including 5% tax how much will a customer pay for one order of mozza melts? please help me

Science

Why has it taken astronomers so long to discover the planet QUAOAR? Space is huge. The object is dim. Under high magnification, even a small amount of space takes a very long time to scan. Plus the object is moving so it's in a different place. That's one way such objects can ...

Art Please Help I need this answered by 8:10 Pm 2n

I need help. I got the answers of 1-3. but I don't know what 4-5 are. 4. The Willows of Marissel by Jean-Baptiste- Camille Corot. Which elements helps to give the illusion of great height and reaching upwards? A. the color of the painting B. the lines made by the trees C. the ...

physics

Ayesha exerts a force of 186 N on a lever to raise a 2.70 × 103-N object to a height of 29.0 cm. If the efficiency of the lever is 83.3 percent, how far does Ayesha move her end of the lever?

Physics

A body of mass 7.5kg is to be pulled up along a plane which is inclined at 30degree to the horizontal. If the efficiency of the plane is 75%,what is the minimum force required to pull the body up the plane?

Physics

When light of a certain wavelength is incident normally on a certain diffraction grating the line of order 1 is at a diffraction angle of 25 degrees. The diffraction angle of the second order line is : a) 25 b) 42 c) 50 d) 58 e) 75 I am not sure how to do this problem since it...

social studies

-Lyndon B. Johnson Former President Lyndon felt that the most important first step in the war against poverty is? A) full employment B) efficiency in government C) our natural defense D) private and public economics

physics

How would you explain this in 100 or so words so I can get a full comprehension of the question? Much appreciated! Please help me: discuss whether or not it is possible for an object to be increasing in speed as its acceleration is decreasing. For either position you take, use...

Order of Operations

Which choice gives the correct order of operations needed to find the value of 4(6+3)-24? A.+,x,= B.x,+,- C.-,x,+ D.+,-,x A? What is the value of the expression 7(3x18-10)? A.53 B.168 C.186 D.308 D? Simplify 4(3+2)+2(16/4) A,88 B,44 C,32 D,28 A? Simplify 451+5x5 A.461 B.476 C....

Math

Arlene plants to sew a patchwork quilt. She purchases different prints, colors, and lengths of fabric for the quilt. She bought the following lengths 3/4 5/8 3/8 1/2. She wants to stack them in order from least to greatest. Which list shows the order which she could stack them...

chemistry

Rank these elements according to electron affinity. Br, S, Ne most energy released by gaining an electron: most energy absorbed by gaining an electron:

Maths

Susanna owns 10 shops and 5 restaurants. She is going to visit three of her businesses and writes her list in order. The order will be: Shop, restaurant, shop OR Restaurant, shop, restaurant. How many different lists can Bethany write? Thank you.

Chemistry(Please check)

A reaction has a rate law, rate = k times A times B squared. What is the overall order of the reaction. I think that the order is 0. Is this correct?

math

If you know the order from least to greatest of 5 negative rational numbers, how can you use the information to order the absolute values of those numbers from least to greatest

Math

Troy can order a large or small snow cone. There are 16 flavors and 2 toppings from which to choose. How many ways can Troy order a snow cone? 120 64 32 30 Is it B? what do I do?

math

If you know the order from least to greatest of 5 negatest rational numbers,how can you use that information to order the absolute value of those numbers from least to greatest

Chemistry-Dr.Bob 222

1. The rate constant for a second order reaction has units of L mol^-1 s^-1. What are the units of the frequency factor, A, for a second order reaction?

math

In this subtraction, the boxes contain the digits 3, 4, 6, and 9 in some order and the circles contain the digits 4, 5, 8, and 9 in some order. What four-digit number is represented

Physics

A certain circuit consists of an inductor of 50 mH in series with a resistor of 130 Ω. At one moment, the current in the circuit is 12 A, and decreasing. How long will it take for the current to fall to 4.8 A? Answer in units of s.

health

Explain why, in terms of job performance and efficiency, knowing medical billing terms is critical for working in the health care field. Respond in at least 150 words and provide specific examples.

Physics

A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 x 10^6 kg/s, what is the rise in temperature of the flowing water?

statistics

Sat scores l around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distributions. a person who scores 600 on the sat 1 has approximately what percentile rank within the population? please show all ...

Math

Decide if the following pair of functions are of the same order. The functions f(x) and g(x) are of the same order if f(x) is O(g(x)) and f(x) is Ω(g(x). (a) f(x) = x^2 - 7 and g(x) = x^2 + 7

chem plz help!

the rate of a nuclear reaction can be changed by?? i know adding a catalyst to a normal reaction can but to a nuclear im not sure. increasing temp decreasing pressure adding a catalyst none I suppose it all depends upon how you define a catalyst. Perhaps in a small way ...

Physics

Calculate the electric power produced by a wind mill, when the wind speed is 10 m/s and the radius of the rotor circle (wing length) is 15 m. The density of air is 1.25 kg/m3. The eefficiency of the wind mill is 45%.

physics

A boy exerts a force of 210 N on a lever to raise a 1.25 103 N rock a distance of 12 cm. If the efficiency of the lever is 88.7%, how far did the boy move his end of the lever? Thanks for all your help :) <3, PhysicsCrazy<3

Chemistry

If we have solution of 4g CH3COONa and 4g NaOH obtained NaCl with efficiency 90% we have to calculate pH oh Nacl and we know that Ka= 1.8x10ˆ-5. Pleas help me i have exam tnext weak Im strudent but I don't undestant this???

algebra

You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years. What integer ...

Physics

A space station is constructed in the shape of a hollow ring of mass 5.60 104 kg. Members of the crew walk on a deck formed by the inner surface of the outer cylindrical wall of the ring, with radius 140 m. At rest when constructed, the ring is set rotating about its axis so ...

Physics

In a double-slit experiment, the fourth-order maximum for wavelength of 450 nm occurs at an angle theta = 90. Thus it is on the verge of being eliminated from the pattern because theta cannot exceed 90. (a) What range of wavelengths in the visible range (400-700 nm) are not ...

accounting

On January 1, 2013, Sweetwater Furniture Company leased office space under a 21-year operating lease agreement. The contract calls for annual rent payments on December 31 of each year. The payments are $19,000 the first year and increase by $350 per year. Benefits expected ...

economics

Studies show that the income elasticity of demand for servants in the United States exceeds 1. Nevertheless, the number of servants has been decreasing during the last 75 years while incomes have risen sygnificantly. How can these facts be reconciled?

Civics

which of the following would be part of the democratic party platform? 1: cutting taxes for the wealthiest citizens 2: providing for public health care 3: decreasing the size of government 4: cutting funding for educational programs My answer is 2 Is that correct?

Biology

Rank the following from most acidic to least acidic. sample pH bleach 12.5 coffee 4.2 rainwater 5.4 soap 10.1 My answer: Bleach, Soap, Rainwater,Coffee Is that right?

Chemistry

If you were to have a lewis dot structure, such as, C2H5OH, where is the O placed? Between a carbon and an H.

philosophy

just a question... do you guys edit essays here? (for grammar/sentence structure?)

science

cells are the basic units of structure and function in living organisims ture or false

it 220

Locate two Web sites that utilize a mixed structure, and list their URLs.

biology

A Annotated diagram describing the structure of a dicotyledonous leaf as seen in cross section

chemistry

Write a Lewis structure of OSF4 in which the formal charges of all atoms are zero

axiacollegue

in what ways do audience, purpose, tone, and structure affect the formatting of the memo and the papers

chem

What is the structure of the white precipitate that forms when actophenone is added to a solution of phenylmagnesium bromide?

acc

Can anyone help me with this please? What are the three most important improvements in the governance structure that could result from SOX?

chemistry

hpw would i draw a lewis structure for a molecule with 3.5 bonds for example NO2???

Chemistry

I need some help to draw a Lewis structure for hydrogen cyanide + what is the noble gas?

chemistry

Write the condensed structure for Methylpropyl ether Would it be C4H11O? CH3-O-CH3CH2CH3

Biology

How does the structure of macromolecules such as proteins act as an index of relatedness between species?

Business

what type of financial structure would you say the veterans hospitals and clinics run on?

Body Structure and Function

Conductivity is the ability of a neuron to react to stimuli? True or False

bio

i need to compare structure and fuction of diffrent cells types? can i get a helpful link for this?

chemistry

Determine the structure of the compound by using the IR and 1H NMR of a spectra that has the molecular formula: C4H8O2

organic chemistry

Determine the structure of the compound C7H14O based on its 13C NMR spectrum.

material & structure laboratory

Is the measured normal consistency lies in the range for the Portland cements?

Ochem

Phenacetin has the structure shown below. Write an equation for its preparation starting from 4-ethoxyaniline.

math

Use structure What property of addition is shown in the following number sentence. Explain

chemistry

how are the ionization energies evidence for the structure of the atom especially the electron configurations for atoms ?

physics

what will happen to the bone structure if earth becomes more dense than its actual density?

English

Is this a correct parallel structure....? The racehorse Boundless was not only fast but also a beauty.

chemistry

for each pair of structure shown below indicate two species are identical molecules.

Chemistry

I am having issues drawing the lewis structure for this...can anyone explain? CHCCH*subscript2*CH0

english

i want to either study or to work abroad after i graduate. correct parrellel structure?

Science

Describe how the structure of DNA is correlated with its role as the molecular basis of inheritance in Biology.

Chemistry

How is the atomic structure of a Copper differ from Germanium, Silicon and Gallium Arsenide ? Tnx :))

biology

How do changes in the nucleotide sequence lead to mutations and how could this affect the primary structure of proteins?

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