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

20,691 results, page 67

To:BobPursley

Earlier you told me "hold a pencil up. A real pencil. I bet you can make perpendiculars in many directions, because the pencil is in a three dimensional space". Could you explain to me what do you mean by this? I try holding up a pencil and doesn't see anything.Thanks

Earth/Space Science

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

College Algebra

Let h(12) = -100 for some function h(x), defined everywhere. If the average rate of change of h(x) from x = 12 to x = 20 is 50, then find h(20). Type your numerical response in the space provided. Do not type in any of the processes which you utilized to arrive at your response.

Math

1. P5 is an innerproduct space with an inner product. We applied the Gram Schmidt process tot he basis {1,x,x^2,x^3,x^4} and obtained the following as the result {f1,f2,f3,f4,x^4+2}. a. What is the orthogonal complement of P3 in P5 with erspect to this inner product? b. What ...

Chemistry

What is the concentration, in mol L-1, of a solution containing 1.2 g of lithium carbonate in 100 mL solution? Give your answer as 2 sig fig, followed by a space and the units (remember the units given in a previous question).

math

A single card is selected from an ordinary deck of cards. The sample space is shown in the figure below. Find the probabilities. (Enter the probabilities as fractions.) (a) P(two of diamonds) 1 (b) P(two) 2 (c) P(diamond) 3

physics

if a monochromatic beam of light with a wavelength of 590 nanometers is traveling through air then enters a region of space where the index of refraction is 1.5, what will the light beam do? increase, decrease, or stay the same?

Science

A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

Math

Am not good with story prombles could someone please help. Can you show me how to come up with answer so that I understand it. The bith rate in the United states in 1996 was 14.7 births per thousand population. In 2006, the birth rate was 14.14 births per thousand. A.Write two...

Social Studies

At home on the hills of Vermont or in the woods of Maine, or the Texan ranch, comrade of Californians, comrade of free North-Westerners. . . . of every hue and caste am I, of every rank and religion. --Walt Whitman, Song of Myself Why did Whitman compose these lines? A. To ...

Economics -- HELP!!!

posted by Angela on Sunday, May 21, 2017 at 12:33am. In the market equilibrium, with a price of $500 there are 2000 apartments. If the government decides to enact a rent control policy, with a maximum price of $400, it reduces the quantity to 1500 apartments. Due to the rent ...

Probability

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?

Probability

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?

Probability

If I have a bag filed with 6 marbles, 2 blue marbles, and 4 yellow marbles, and I had to pick one from the bag, what is my sample space?

Linear Algebra

4 points A,B,C and D are situated in a 3-dimensional space. In a certain spot, the coordinates of A, C and D are known: A(1,1,1) C(2,0,1) D(0,3,0) The coordinates of the barycentre of {A,B,C} are: (4/3, 1/3, 4/3). a) Determine the coordinates of point B in the used spot.

Linear Algebra

4 points A,B,C and D are situated in a 3-dimensional space. In a certain spot, the coordinates of A, C and D are known: A(1,1,1) C(2,0,1) D(0,3,0) The coordinates of the barycentre of {A,B,C} are: (4/3, 1/3, 4/3). a) Determine the coordinates of point B in the used spot.

Physics

A spaceship in deep space has a velocity of 4000 km/s and an acceleration in the forward direction of 6 m/s2. What is the acceleration of a ball relative to the spaceship after it is released in this spaceship?

PHYSICS

A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = 2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vy = 50 m/s, vx = vz = 0, what is the speed of the particle at t = 2.0 s?

Chemistry

How will the boiling point of a substance be affected by increasing the atmospheric pressure? How will the boiling point of a substance be affected by decreasing the atmospheric pressure?

Algebra (Need help desperately)

I really don't understand these.. can someone show me the correct way of doing them? (if it helps I will pay over paypal for detailed help or will pay in my services (I am a graphic designer, video editor, and web designer) ************************************ 1. Your computer...

Math 7 (Q2)

Cindy is making a punch for a party. The recipe calls for 3 bottles of cranberry juice in order to make enough punch to serve 40 guests. How many bottles of cranberry juice will Cindy need in order to make enough punch to serve 100 guests? Answer ___________ bottles so..... 3/...

Math

A car has a fuel efficiency of 33 miled per gallon.(a) Find a function G that calculates the number of gallons required to travel x miles. (b)If the cost of gas is $4 per gallon, find the function C that calculates the cost of fuel to travel x miles.

Literacy

The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced trade. B. free trade. D. ...

Physics

An astronaut in outer space pushes himself away from his spaceship. About how far does the astronaut go before stopping? What does the astronaut have to do to stop himself?

Finite Math

Let A and B be two events in a sample space S such that P(A) = 0.5, P(B) = 0.6, and P(A intersection B) = 0.15. Find the probabilities below. Hint: (A intersection Bc) union (A intersection B) = A. (a) P(A|Bc) ________ (b) P(B|Ac) ________

Physics

A particle (mass = 4.0 g, charge = 50 mC) moves in a region of space where the electric field is uniform and is given by Ex=3.0N/C. If the velocity of the particle at t=0 is given by vy=40 m/s, what is the speed of the particle at t=2.0 seconds?

physics

A car comes to a stop for a stop sign in 4.6 seconds. If it was initially traveling at 27.5 m/s, how much space did it take for the car to stop?

music

i have to do a project about 'west end musicals' can anyone suggest how i structure his and what i should include because I don't know what to include. shall i include a page about a popular musical and so on or not? can anyone find any useful sites which I can refer to whilst...

Macro economics

5. The problem of determining what goods and services society should produce: A.exists because we can produce more than we need or want. B.exists because there are not enough resources to provide all the goods and services that people want to purchase. C.would not exist if all...

Physics

Sorry for reposting this but I'm still confused with the last part... You have been sent in a small spacecraft to rendezvous with a space station that is in a low circular Earth orbit, say, with a radius of 6,720 km, approximately that of the orbit of the International Space ...

Physics

Sorry for reposting this but I'm still confused with the last part... You have been sent in a small spacecraft to rendezvous with a space station that is in a low circular Earth orbit, say, with a radius of 6,720 km, approximately that of the orbit of the International Space ...

science

Three very small spheres of mass 3.00 kg, 5.00 kg, and 3.00 kg are located on a straight line in space away from everything else. The first one is at a point between the other two, 13.0 cm to the right of the second and 24.0 cm to the left of the third. Compute the net ...

English

I don't know what rhetorical devices these themes fall under. I know all these are themes but the themes are harder to figure out . 1. The value of dreams can be both a positive and be both a positive and negative influence. 2. It is important for men and women to play ...

math

Two points, A and B, are 275 ft apart. At a given instant, a balloon is released at B and rises vertically at a constant rate of 2.5 ft/sec, and, at the same instant, a cat starts running from A to B at a constant rate of 5 ft/sec. a) After 40 seconds, is the distance between ...

math

The average cost per item, C, in dollars, of manufacturing a quantity q of cell phones is given by C= (a/q) + b where a and b are positive constants a.Find the rate of change of C as q increases. What are its units? b. Currently, 5000 phones are being made and production is ...

math

The average cost per item, C, in dollars, of manufacturing a quantity q of cell phones is given by C= (a/q) + b where a and b are positive constants a.Find the rate of change of C as q increases. What are its units? b. Currently, 5000 phones are being made and production is ...

MATH!!!

an oil well produceds 2500 barrels of oil during its firt month of production. The oil company predicts its production will drop 5% each month thereafter. how many barrels of iol will this company produce in its first yeear? what formula would I use and I how I do this ...

PHYSICS HELP!!

A motorised gearbox has a reduction ratio of 50:1. The power input to the gearbox is 5 kW at 1440 RPM. The gearbox efficiency is 85% under maximum load conditions. The output shaft of the gearbox is attached to a winch drum of pitch diameter 220 mm and is used to hoist a load...

PHYSICS HELP!!

A motorised gearbox has a reduction ratio of 50:1. The power input to the gearbox is 5 kW at 1440 RPM. The gearbox efficiency is 85% under maximum load conditions. The output shaft of the gearbox is attached to a winch drum of pitch diameter 220 mm and is used to hoist a load...

CHemistry Dr. Bob please?

for bond energies if tehy give u a diagram of the structure for whatever like c--h--o==h or soemthing amd a chart with c--h=-670 Kj /mol or whatever do u just add all of the KJ/mol together? but what if they only want kJ? would you just multply whatever kJ/mol *1 mol?? how do ...

Grammar and Composition

ok, after i posted this yesterday: ok, now that i have my pet peeve, i have to fill out this sheet. (please read my earlier post for more info on the assignment) Pet Peeve--Organizational Sheet Audience: Who will be your audience? You must indicate an audience that your ...

Chemistry

The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which one of the following ...

English

I left out the following sentences. Thank you. 1) Some schools valued their pupils' athletic achievements more than their academic ones. Team games became essential for inculcating discipline, obedience and sense of duty in the pupils. 2) Team games such as football, cricket ...

international business

select a multinational organizatio and describe the organization design that the company uses. include information such as structure, subsidiaries, geography,etc. analyze the reason why you blieve the company has chosen this design. do you think that this is the best design ...

Literature/Social Studies (Ms. Sue!)

The New Frontier" by John F. Kennedy. 1. What ideas does Kennedy express by quoting William Brandford? A: By quoting William Bradford, Kennedy expresses the idea that, despite great difficulties, man can overcome anything through their will and determination. 2. What reasons ...

FREE BODY DIAGRAM calculus

A car is traveling north towards an intersection at 60mph at the same time a truck is headed east toward the same intersection at 45mph. Find the rate of change of the distance between the car and truck when the car is 3 miles south of the intersection and the truck is 4 miles...

French

1. Nous sommes allés faire du ski 2. Nous avons quitté Strasbourg assez tard 3. Nous avons dû passer la nuit à Lyon 4. Nous sommes arrivés à la montagne seulement samedi 5. Il y avait beaucoup de voitures sur la route. 6. Il neigeait 7. La route était mauvaise 8. Il é...

5th grade math

suppose you made your garden 5ft wide... what would its length be? what would its area be? what would be the area of the left over space in the yard.

physics

In the outer space, a constant force is applied to a 32.5 kg probe initially at rest. The probe moves a distance of 100 m in 10 s. (a) What acceleration does this force produce? (b) What is the magnitude of the force?

physics

A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = -5.5 N/C, Ey = Ez = 0. If the position and velocity of the particle at t = 0 are given by x = y = z = 0 and vx = 50 m/s, vy = vz = 0, what is the ...

Chemistry

A certain substance undergoes decomposition by a first-order reaction which has equal to 30.0 minutes. If the initial concentration of the substance is 1.28 mol/liter, what will its concentration be after 2.50 hours? 1. 0.36 M 2. 0.040 M 3. -0.32 M 4. 0.020 M 5. 0.16 M 6. None...

science

how are plants and windmills alike They both depend upon air? They both lift water from the ground. can u help me get an answer for this cause i have to write a 2 page easy on this and i don't know were to get the info''How do weather conditions affect when space launches take...

reaearch paper

How can I narrow down all my research to 3 pages? Smaller font, no run on sentences, no useless info if you have to dubble space don't (hearts) Edit out all of the parts that don't directly pertain to your thesis statement.

math

here is my problems url its typed with spaces please rewrite it with out space to see the image. and it wont need password or anything go to (zshare . net )/image/126113093ead8f03 the question is to: *find the area of the shaded region.

Physics

It has been suggested that rotating cylinders about 10 mi long and 5.6 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration?

geometry

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

physics

It has been suggested that rotating cylinders about 10 mi long and 4.9 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration?

Physics

It has been suggested that rotating cylinders about 10 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration?

geometry

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

math

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

geo

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

Art

In the painting The Bridge at Argenteuil by Claude Monet how did the artist create interesting textures in this image? a. by experimenting with various brushstrokes b. by using only one color c. by concentrating on negative space d. by using no change values Is the answer A?

Physics

an astronaut of mass 150 kg is stranded 100 m from the international space station and is at rest relative to it he decides to throw his movie camera of mass 4.5 kg away at a speed of 10 m/s he has 5 minutes of air left in his tank does he make it back in time?

algrbra

the volume of the shape below is placed into a bow that is 10 feet tall and the area of the base is 48ft squared feet. to the nearest tenth what is the remaining space. The figure is a sphere that has a radius of 6 ft. r=6ft I really need help figuring how to do this.

algrbra

the volume of the shape below is placed into a bow that is 10 feet tall and the area of the base is 48ft squared feet. to the nearest tenth what is the remaining space. The figure is a sphere that has a radius of 6 ft. r=6ft I really need help figuring how to do this

Science

1.What is the genetic code? (1 point) The order of amino acids in proteins makes up the genetic code. The order of amino acids in mRNA makes up the genetic code. The order of nitrogen bases in tRNA makes up the genetic code. The order of nitrogen bases in DNA makes up the ...

Chemistry

At a given Temperature, the elementary reaction A<--->B in the forward direction is first order in A with a rate constant of 3.90*10^-2s^-1. The reverse reaction is first order in B and the rate constant is 8.20*10^-2s^-1. What is the value at equillibrium for the ...

Managerial Economics

Suppose that a firm is currently employing 10 workers, the only variable input, at a wage rate of $100. The average physical product of labor is 25, the last worker added 10 units to total output, and total fixed cost is $5,000. a. What is marginal cost? b. What is average ...

Managerial ECON

Suppose that a firm is currently employing 10 workers, the only variable input, at a wage rate of $100. The average physical product of labor is 25, the last worker added 10 units to total output, and total fixed cost is $5,000 a. What is marginal cost? b. What is average ...

Math

Hi, I am doing a practice exam, and I came across this problem and I am have difficultly starting it. A UFO flies horizontally at a constant speed at an altitude of 15 km and passes directly over a tracking telescope on the ground. When the angle of elevation is pi/3, this ...

Biology

Can someone please check if my answers are correct? 21. The difference between autotroph and heterotroph is that a. heterotrophs must get energy from sources other than the sun b. heterotrophs can use chemical or light energy sources c. heterotrophs do not obtain energy from ...

Chemistry

A large sport utility vehicle has a mass of 2500kg. Calculate the mass of CO2 emitted into the atmosphere upon accelerating the SUVfrom 0.0mph to 66.0 mph. Assume that the required energy comes from the combustion of octane with 30% efficiency. (Hint: Use KE= 1/2mv^2 to ...

ELA (English)

And yet, Linenger recovered quickly. in fact, almost two dozen astronauts have lived in space for more than six months, and four have stayed in orbit for more than a year. These men and women faced the discomfort of weightlessness and overcame them and they all readapted to ...

chemistry

How does Carbon hybridize it's S and P orbitals and what effect does this have on the 3D structure and chemical behavior? Your answer must include 1) diagrams of SP, SP2, and SP3 bonds as well as any left over Py or Pz orbitals; 2) a discussion with diagrams of how the sigma (...

biology PLEASE ASSIST!!

1.The structure and functions of the cell are controlled by what??? 2.Explain why DNA is able to play a role in the transmission of hereditary information. 3.State TWO functions of DNA 4. Explain how genetic fingerprinting can be used to prove is the identity of the father of ...

probability

Let È be the bias of a coin, i.e., the probability of Heads at each toss. We assume that È is uniformly distributed on [0,1]. Let K be the number of Heads in 9 independent tosses. By performing some fancy and very precise measurements on the structure of that particular coin...

english

A comparison of the poems "quickdraw" and "the farmers bride"! Discuss the techniques used, analyse the language/structure/form explore layers of meaning and comment on the effect of the reader. E.G compare how the poets use verbs or metaphore or imagery or similes etc... ...

Operations

You have a retail-clothing store for fashion items. For simplicity, let us consider just one gown in this question. You have to purchase your inventory at the start of the season at $60 per gown, and you plan to sell it $100. You have a 50% chance of selling more than 10 gowns...

Physics

When pressure sores develop from sustained positions, the damage occurs at two locations simultaneously – the superficial layers of skin next to the table, and the deep tissue next to the bony structure (e.g. lateral aspect of the femur) that the patient is lying on. ...

Math

Two balls are to be selected without replacement from a bag containing one red, one blue, one green, one yellow, and one black ball. How many points are there in the sample space?

math

You have been appointed by the new executive director to chair a committee of agency administrators charged with (1) conducting an inventory of the agency’s various services and activities, (2) recommending a program structure, and (3) recommending responsibility center ...

Solar Energy Please Help

a) Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system. Considering that the need for warm water is 100L/day, the water has to be ...

Physics

In outer space, a constat net force of magnitude 140 N is exerted on a 32.5 kg probe initially at rest. (a) what acceleration does thie force produce? (b) how far does the probe travel in 10.0 s... I got a which equals 4.31 m.s^2 but how do i solve for b

English

Hello. I wonder if English has certain rules concerning word division (I mean when there isn't enough space for a word on the line (or-ga-nize). I will appreciate it if you give a reference (if any)to this material. Thank you for all your detailed answers.

painting

compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino (Image 15-2) and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale (Image 15-5)

probability

a coin is flipped fifteen times how many elements are in the equally- likely sample space? how many different events exist? what is the probability of at most a head occurring? what are the odds at least one head OCCURS

math

Suppose that the mosquito population of the world is 36000000 and that these mosquitoes can be packed into a cubic box with no space wasted. If the average volume of the mosquito is 6mm^3,how long would the edge of the box have to be?

math

A guy wire (a tensioned cable designed to add stability to a free-standing structure) is attached to a telephone pole whose height is 25 ft. If the wire is attached to the ground at a point 15 ft away from the base of the pole, what is the slope of the wire?

english thesis

I am not sure if my my original post, posted? lol o Age, understanding the concept of death, and the changes in family structure all depict the type of grieving a child will experience after to the death of a sibling. that is my thesis, but I want to know if anybody has ...

Organic chemisty(Please check)

When drawing a kekule structure for CH3CH2OH(alcohol) do I leave the OH at the end just like it is (OH) or would it be shown as O-H? I know that to start of it would be -C- with an H on the top and the bottom as well as the left side and then connected to the C would be ...

Rocket Science

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth

Math/Science

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 260 miles and a perigee of 220 miles above the surface of Earth.

Chemistry

Hi I was hoping to get some help on this. It's review for my chemistry text on Monday and I would be grateful if someone could help me out. My teacher has been out for two weeks but we still have to know this material. 1. The following data was collected for the reaction ...

biology (multiple choice!)

Evolutionary adaptations that help diverse animals exchange matter with the environment include a. gastrovascular activity, two-layered body, and torpedo shape. b. large volume, long tubular body, and wings. c. complex internal structures, small size, and large surface area. d...

Math

A square is 10.5 sq ft by 10.5 sq. ft. The tiles used are 1 sq. ft. How many tiles will be used to fill the space?

space

If someone observes the moon for 60 days what days will their be a full moon?

Spanish

What is UOLSRRSEDELO unscrambled? The word is a spanish word and is written as: _ _ _(space) _ _ _ _ _ _ _ _ _ Thanks!

Science

What kind of Information can a Compound microscope provide? Much more information than I can type for the next three months. Blood cells, animal parts, leaf structures, snow flakes, and you get the idea. I was sick about two weeks when I was a child and we didn't know what was...

Calculus

In order to express the function y=12^19x+7 as a composition of two functions the outer of which is an exponential function,we would let u be equal to the inner function, u=19x+7, and then write y as a function of u, as follows: y= ??? . (b) In order to express the function P=...

Cognitive psycology

o Define language and lexicon. o Evaluate the key features of language. o Describe the four levels of language structure and processing. o Analyze the role of language processing in cognitive psychology

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