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

20,691 results, page 59

Writing

oh noo i dont want to write book so maybe this: how is racism interconnected with culture and what role does social structure play in racism and is it socially constructed if so why and how and to what capacity is power involved in racism maybe this if so how can I find ...

english

I just need something to get me started. Do you know of a Cultural Symbol or a Cultural Tradition I can write about. I've been trying to do this project for weeks and I do not know what to do. I know it's easy, but I can't find what it;s asking. please help. This may help: ...

math

the roller coaster has two seats in each of 12 rows. Riders are assigned to seats in the order they arrive. if you ride this roller coaster once, what is the probablilty of getting coveted first row? How many times must you ride in order to have atleast a 95% chance of getting...

physics

Two slits are 0.158 mm apart. A mixture of red light ( wavelength = 65 nm) and yellow green light (wavelength = 565 nm)falls on the slits. A flat observation screen is located 2.24 m away. What's the distance on the screen between the third order red fringe and the third order...

chemistry

how do you solve this? The candy indistry converts sucrose (C11H22O11,table sugar),a crystalline material, to invert sugar, a hydrolzyed [rpdict tjat os 50:50 frutose and glucose. The hydrolysis occurs in water, quite slowly, at an elevated temperature of 55¨¬C. The reaction...

Calculus

a local office supply store has an annual demand for 50,000 cases of photocopier paper per year. it costs $2 per year to store a case of photocopier paper, and it costs $50 to place an order. Find the optimum number of cases of photocopier paper per order

Science

How were asteroids formed? Were they just formed by melted materials in space? were they formed in the asteroid belt?

Science-Help

How were asteroids formed? Were they just formed by melted materials in space? were they formed in the asteroid belt?

earth

When earth is seen from outer space,it looks mainly blue. This is because most of the earth is covered with.

Chem

Use principle of atomic structure and/or chemical bonding to explain why the boiling point of Cl2 is lower than the boiling point of Br2. Make sure that your response refers to both substances.

AP Chemistry

The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

AP Chemistry

The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

AP Chemistry

The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

Biochemistry

Because ethanol is a poor substrate for LDH, shouldn't it have a lower Km than lactate? (Because Km is binding affinity) Also, how do the structure of active sites (for example, in this case lactate and ethanol) influence Km? THANK YOU SO MUCH!

Math

In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events in...

physics

A weight is hung by a cord from the ceiling of an elevator. From the following conditions, choose the one in which the tension of the cord would be the greatest...least?(draw force diagrams) a) elevator descending at a decreasing spped b)elevator at rest c)elevator rising at ...

chemistry please help

Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: -141 kJ/mol 2nd electron affinity ...

CHEM please!!! help

Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: -141 kJ/mol 2nd electron affinity ...

Economics.

I need help with these question! What are three main goals sought by policymakers in the economy? Also, I have to write an essay on ways the government can effect the economy. Which is the way that provides the most impact on the economy and why. ^I need sources of information...

English

1. They were poor because they were not educated. [Is 'educated' an adjective or a past participle? Is 'were educated' a passive tense? Or is it 'Verb + Adjective' structure?] 2. She wanted to help with their education. [What is the meaning of 'with' in this sentence?]

math

using digits 1-9 only once, multiply a 3 digit by a 2 digit number and get a 4 digit result 12*345=4140? looks ok to me. the answer would have to be 6789 or some order of those digits if you used the others in the question. digits 1-9 used only once, no zeroes. The digits can ...

math

1. 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. a. What ...

Biology

J.J. Thomson's experiments supported the existence of a particle that deflected away from a negative charge and toward a positive charge. Ernest Rutherford found that when positive particles were fired at gold foil, some of the particles deflected rather than passing straight ...

Science

You are floating motionless in outer space. Your mass is 70 kg. Your 70 kg transporter floats by and you attempt to bring in closer by flexing your right arm. Are you more likely to produce an isotonic or isometric contraction? Explain.

Science

You are floating motionless in outer space. Your mass is 70 kg. Your 70 kg transporter floats by and you attempt to bring in closer by flexing your right arm. Are you more likely to produce an isotonic or isometric contraction? Explain.

Physics

If a cylindrical space station 300m in diameter is to spin about its central axis, at how many revolutions per minute rpm must it turn so that the outermost points have an acceleration equal to g?

Physics

If a cylindrical space station 300 {\rm m} in diameter is to spin about its central axis, at how many revolutions per minute ({\rm rpm}) must it turn so that the outermost points have an acceleration equal to g?

Psychology

Explain how even though images appear on the retina in two-dimensional space, we are able to perceive objects in three-dimensions ====== can someone answer this please? or give me an idea of this question? thanks

Geography and Society

What is the primary function of Earth's atmosphere? a. to trap heat from the sun b. to shield the planet from harmful radiation*** c. to disintegrate space debris before it reaches the surface d. all of the above

calculus

This is my last question, when I usually get problems like this the volume would be there and I would be able to solve it but this question is very confusing. A spherical iron ball is coated with a layer of ice of uniform thickness. If the ice melts at the rate of 8mL/min, how...

English

I need help putting my thesis into "parallel grammatical structure". Children should be limited on the amount of television they watch because not only is it filled with bad influences but it causes them behavior problems, and ultimately puts their health at risk. What is ...

Physics

Given that electricity is priced at constant 13.5 pence per kWh and central heating oil (kerosine) varies in price between 39 pence and 137 pence per litre. What price does kerosine need to be to make heating domestic hot water cheaper using an immersion heater? Assume oil ...

math

Name: Barbara Dillon Date: July 18 2010 1. Divide 90÷18 =5 Answer is 5 2. Place the following set of numbers in ascending order. 22, –7, 8, –4, 12, –1, 14 Ascending order : -7, -4, -1, 8, 14, 22 3. Add 4. Subtract 5. Divide -18÷ -9 = 2 6. Evaluate Absolute value of [-...

algebra 1

The Question Writing Commitee consists of seven volunteers from around the country who are amazingly dedicated to the Mathcounts program. This past weekend, was the last meeting for this particular group of question writers. Before the meeting, they are put into pairs, eith ...

Accounting

Assuming in ur business, d cost per oder for ur product is 4000 naira and it carry cost is 400 per unit per annum ur business has a demand for 20000 unit per year,1)Calculate d order size 2)total order required during a year 3)total carried cost and total ordering cost for d ...

accounting

Assuming in your business, the cost per other for your product is 4000 naira and it carry cost is 400 per unit per annum your business has a demand for 20000 unit per year,1)Calculate the order size 2)total order required during a year 3)total carried cost and total ordering ...

Math

Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...

physics

Sewage at a certain pumping station is raised vertically by 5.27 m at the rate of 1 930 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output mechanical power of the ...

Physics

Sewage at a certain pumping station is raised vertically by 5.57 m at the rate of 1 860 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output mechanical power of the ...

physics

Two slits are illuminated by a 536 nm light.The angle between the zeroth-order bright band at the center of the screen and the fourth-order bright band is 16.1 degrees. If the screen is 176 cm from the double-slit, how far apart is this bright band from the central peak? ...

Physics

Blocks of mass 4, 8, and 24 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. A rightward-pointing force of magnitude 15 N is applied to the left-most block. Suppose now that the left-right order of the blocks is...

chem

A certain first-order reaction has a rate constant of 2.75 10-2 s−1 at 20.°C. What is the value of k at 50.°C if Ea = 75.5 kJ/mol? i know to use the ln(k1/k2)= (ea/R)((1/T1)-(1/T2)) but how do i know what T2 is when i only have one temp? there is a b part to the ...

PHYSICS!!

(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...

PHYSICS HELP!!

(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...

ecoc

i can not figure this out the economist for the grand corporation has estimated the company's cost function, using time series data, to be TC=50+16Q-2Q2+0.2Q3 a.plot this curve for quantites 1 to 10 b.calculate the average total cost,average variable cost, and marginal cost ...

Math

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000 profit, a 23% chance of ...

Math

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000 profit, a 23% chance of ...

MATH

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000 profit, a 23% chance of ...

MATH

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000 profit, a 23% chance of ...

Chemistry (please check)

1)Which of the following compounds has the largest lattice energy: LiF LiCl NaF NaCl 2)Which of the following compounds has the most ionic character in its bonding: CaBr2 GeBr4 KBr GaBr3 3)Using the electronegativity table on page 364 of your text, which end of the B-N bond is...

Math

Which of the following are the numbers NOT in correct order from SMALLEST to LARGEST? A.)-3.1, -3.5, 0, 0.7, 1.5 B.)-2.3, -1.5, 0.1, 0.33, 0.35 C.)-6.1, -5.33, -4, -0.25, 0 D.)-2.3, -1.5, -0.9, 0, 0.09 PLEASE HELP ME!!! Draw a number line, something like this. -4...-3...-2...-...

Social Studies

1) What statement best describes Yokohama? A) Yokohama is an ancient political center B) Yokohama is a rural farming village C) Yokohama is a large, crowded city D) Yokohama is an important mining town 2) What describes a difference between life in japan and life in the United...

algebra

elmer burns works for a ready-mix concrete cmpany. elmer receives an order for 3.5 cubic yards of concrete. this mixture of concrete contains sand, cement, gravel, and water, for each pound of water, there are 5 lb of sand, 2 lb of cement, and 6 lb of gravel. find (a) the ...

math

Scott, Mike, and Holly shared an order of French fries. Scott ate x fries. Mike ate one more than twice the amount of fries that Scott ate. Holly ate 5 fewer fries than Scott did. If there were 6 fries left, how many fries were in the order? a. x-5 b. x c. 2x+`1 d. 4x-4 e. 4x+...

physics

In order to qualify for the finals in a racing event, a race car must achieve an average speed of 276km/h on a track with a total length of 1520m. If a particular car covers the first half of the track at an average speed of 246km/h, what minimum average speed must it have in ...

Physics

In order to qualify for the finals in a racing event, a race car must achieve an average speed of 230 km/h on a track with a total length of 1810 m. If a particular car covers the first half of the track at an average speed of 245 km/h, what minimum average speed must it have ...

Math

The daily temperature is decreasing at a rate of 2 degrees Fahrenheit T represent the daily high temperature now right then expression for the high temperature in five days the current at high temperatures need to address for hi-fi high temperature in five days check into you ...

ap chemistry

Rank the compounds CH3OH CH3CH2OH CH3CH2CH2OH in terms of increasing evaporation rate. 1. CH3CH2CH2OH < CH3OH < CH3CH2OH 2. CH3OH < CH3CH2CH2OH < CH3CH2OH 3. CH3OH < CH3CH2OH < CH3CH2CH2OH 4. CH3CH2OH < CH3CH2CH2OH < CH3OH 5. CH3CH2CH2OH < CH3CH2OH &...

Electrochemistry

In lab, we did an experiment with electrochemical cells with solutions of ZnSO4, CuSO4, Al2(SO4)3 and MgSO4 and their respective metal electrodes. There are a couple of post-lab questions that I'm not sure about: (1) Summarize Part A with a data table containing the headings: ...

English- Sentence Structure

There are many potential elements that need to be considered before the main root to war being beneficial is found. I wrote this sentence is there another way to re-word it so it can sound stronger (using the same basic idea that I had)

psychology

The physical structure of the auditory sense is responsible for transmitting messages about balance to the brain. it does this through: A) The "hammer" and " anvil" bones B) sound waves C) the part of the auditory nerve that is not involved in hearing D) hair cell I think is C

chem

Potassium chloride crystallizes with the rock salt structure. When bathed in X-rays, the layers of atoms corresponding to the surfaces of the unit cell produce a diffracted beam of X-rays (¥ë=154 pm) at an angle of 6.97¨¬. From this, the density can be calculated and is ...

biology

The structure of chromosomes is best explained as DNA broken apart into separate genes. extended to form very long, thin molecules. wrapped tightly around associated proteins. coiled up into a ball.

Science (Human Anatomy)

THIS QUESTION IS WORTH 50 MARKS I NEED SOURCES AS WELL Relate their structure of a neuron to the anatomy of the cerebral cortex and spinal cord Be sure to discuss the locations of soma, axons, dendrites, and supportive cells in each area.

History

Is anyone available to help me? I need to create a metaphor to describe the structure of our federal government The example they provided is "The American Government is a tripod; without each post, it would collapse." I can't find anything that fits very well. Any ideas on ...

Marine Science

Organisms on a rocky shore compete for all of the following except? 1) Affection 2) Nutrients 3) Space 4) Light I think the answer might be light but im not sure.

History

Can you please explain this to me the best that you can? GP would create tolerance because everyone would be in each other's space due to overpopulation. What is a good follow up sentence to put after that.

Math

What's the difference between sample space and event in a lottery game (where 50 numbers are drawn and you have to guess/pick six numbers?). Can you give examples of both?

Science

What kind of information has the International Space Station provided us? And what have we benefited from the information? I'm doing a project and I can't find these answeres ANYWHERE!! Any answers or websites would be GREAT!! Thank you!!!

Physics

The international space station ISS travels now with a speed of 7352 m/s. Calculate a) the radius of its orbit; b) the height of the orbit; c) the period of its motion around Earth.

physical

a rocket moves through outer space at 11,000 m/s at this rate how much time would be required to travel the distance from earth to moon which is 380,000 km

physics

Two charged particles q1 and q2 were initially at rest at a seperation of 2m in a gravity free space. Then evaluate after what time seperation between them will be 8m (neglect electromagnetic losses) .

science

Suppose you are an astronaut making a spacewalk outside the space shuttle. In your excitement about your walk,you use up all the gas in your reaction jet. How do you get back to the shuttle

statistics

A test has 1 true false question and 2 multiple choice questions(A B C D). Draw a tree diagram and determine the sample space for the possible ways to answer the test.

physics

Severed particles act on each other although separated by time and space. What is the relation between dark matter and the effect on the particles when exposed to neutron bombardment?

Physics

The mass of the Earth=Mg=5.97x10^24 kg. The radius of the Earth=RE= 6.38 x10^6 m. A) What is the weight of the 75 kg person? B) Determine the acceleration due to gravity aboard a space shuttle at an altitude of 400km.

Need Help asap for math!

A plane is steering at S83degreesE at an air speed of 550 km/h. The wind is from N70degreesE at 85km/h. Find the ground velocity of the plane to 1 decimal space.

fundamental concepts

Free play, eating a snack, painting, hearing a story, and so forth are related to which of the following learning concepts? A. Space B. Classification C. Size D. Time a.

Weight Is Force! Science

A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet?

Chemistry please help

A general reaction written as 1A + 2B --> C + 2D is studied and yields the following data: Expt (A). (B) initial (C)/t 1. 0.150. 0.150. 8.00 x10^-3 2. 0.150. 0.300. 1.60 x10^-2 3. 0.300. 0.150. 8.00 x10^-3 What is the order of the reaction with respect to B? What is the ...

geometry and combinatorics

An equilateral triangle with side length 33 is divided into 33^2 smaller unit equilateral triangles each with side 1, forming a triangular lattice. We color each segment of length 1 either Red, Blue or Green, subject to the condition that each small unit equilateral triangle ...

physics

A car's internal combustion engine can be modeled as a heat engine operating between a combustion temperature of 1500∘C and an air temperature of 20∘C with 30% of the Carnot efficiency. The heat of combustion of gasoline is 47 kJ/g. Q) What mass of gasoline is burned to ...

Astronomy

Consider dropping a Professor with an estimated mass of 80 kg from a safe, large distance, onto a SMBH with a mass of 10^7M⊙. The Prof makes an impact at the Schwarzschild radius, whereby he converts all of the gained kinetic energy into radiation with a 100% efficiency...

Social Studies

"Spreading light...without taking part in the affairs of the world...seeing as a trap...all expantion into Africa or the Orient-for a great nation to live this way, believe me, is...in less time than you may think, to sink from the first rank to the third and fourth." -Jules ...

Discreet Mathematical Structures

Use proof by contraposition to prove the following statement: If A is the average of two positive real numbers then one of the two numbers is greater than or equal to A. Proof. Domain: positive real numbers P: A=(x+y)/2 Q: x is greater than or equal to A or y is greater than ...

physics

A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 2.00 m and the distance from the fulcrum to the load is 0.500 m. A graph of resistance force vs. effort force is shown. What is the mechanical advantage of the lever? What is ...

Math

Bett, Cathy, Isabel, Lani and Ursua run an 800-meter race. Betty beat Cathy by meters. Alma finished 12 meters behind Lani. Bettty finished 5 meters ahead of Ursula but 3 meters behind Lani. Isabel finished halfway between the first and last person. In what order did they ...

chemistry - Bonding

#1) Draw the following ions using a Bohr diagram: b)oxygen: i got [oxygen:2)8)]-2 (the -2 is an exponent) but the answer said [oxygen: 2)8)8)]-2...is this right? d)fluorine: i got [fluorine:2)8)]-1 and the book says [fluorine: 2)8)8)]-1..again, is the book making a mistake? #8...

chemistry

1 _____is defined as one-half of the distance between the nuclei of two adjacent metal atoms in the close packed crystal lattice ionic radius metallic radius covalent radius atomic radius 2 Except for rubidium and caesium, all common cations are smaller than all common anions ...

Philosophy

Use the diagramming method for identifying the argument structure of the following: "The Democrats tend to be to the left on social policy, and the new Congress is controlled by the Democrats, so we can expect a swing to the left. Of course, there are always exceptions."

Philosophy

Use the diagramming method for identifying the argument structure of the following: "The Democrats tend to be to the left on social policy, and the new Congress is controlled by the Democrats, so we can expect a swing to the left. Of course, there are always exceptions."

american government/ economics

A constituion: is a unitary form of government., sets out the principles and structure of a government., is a part of federal system of government ., is devolped only for democratic governments. i think its b.if not correct please, thank you

10th grade

I really need help! I need to know how a Table with polyatomic listed looks like. And Rules for naming Covalent Compounds (mono, di, tri,..) and How to find Lewis structure using the periodic table

Science

Which structure is less likely to suffer severe damage uring an earthquake: a high-rise, steel-frame hotel built on sediments, or a wood-frame house built on bedrock? Explain.

physics

A spherical balloon has a radius of 6.76 m and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 950 kg? Neglect the buoyant force on the cargo volume itself.

AP Chemistry

The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

Psychology need to know if i have correct answer

What is a comprehensive theory on the structure of personality that contributes to our knowledge about the origins of psychopathology? a. Psychology b. Psychotherapy c. Psychoanalytic model d. None of the above My answer is B

Physics HELP

You have a converging (convex) lens and a diverging (concave) lens and the magnitude of the focal length of each lens is 38.5 cm. (a) Determine which lens you should use in order to produce an image of a light bulb on a screen several metres away. (b) Determine how far from ...

math

What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from left to right? Write an expression for your classmates to simplify using at least three of the operations from the order of operations. Consider ...

precalc

For the graph y=2, what is the: A) Domain B) Range C) X values of all zeroes D) Equations of all asymptotes E) 1 to 1 or not F) Continuous or not (if continuous tell where) G) Increasing, decreasing, both (if both tell where), or neither H) Bounded above, bounded below, ...

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