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

20,691 results, page 57

Physics

Calculate the magnitude of the magnetic ﬁeld at a point 43.6 cm from a long, thin conductor carrying a current of 1.24 A. The permeability of free space is 1.25664 × 10^−6 T · m/A. Answer in units of T

Social Studies

A shopper choosing a new oven for his home would likely make a decision based on a scarcity of which of the following? a) money b) time c) stores d) space I think it is d.

Physics!

Consider someone in a rotating space habitat. The outward force felt by the person A.has no reaction counterpart B.is an interaction with Earth C.is a form of gravity D.is real in the traditional sense

Physics

Suppose the surface (radius = r) of a cylindrical space station is rotating at 29.1 m/s to provide artificial gravity. What must be the value of r for the astronauts to weigh 1/3 of their earth weight? Don't know how to start please help.

Art

Sketchbook 7 by Vivian W. Which element did this artist use most to emphasize her original creation of a cotton candy creature? A. negative space B. color C. line D. texture Is the answer C?

concept development

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 my answer is d.

critical thinking

Which of the following is not a way to succeed in college? A. Be flexible with planning activities B. avoid procrastination C. establish realistic goals for yourself D. organize a work space my answer is b.

From theory and practice

Which of the following is best suited to a formative assessment of progress? A. Muscular strength and endurance B. Awareness of self and space C. Body fat analysis D. Flexibility My answer is B

science

Discuss current or future applications of nanotechnology in fields such as medicine, engineering, space exploration, fuel cell development, air and water purification, and agriculture.

statistics

3 different drugs are under consideration for trating a given ailment. in the past 10,000 applications, drug A was sed 2500 times, drug B 4000 times, and drug C 3500 times. when an expert was asked to rank the effectiveness of the 3 drugs, he replied: "drugs A is twice as ...

Physics

Hey, have a question in Physics From a power magazine released 300,000 gallons of water pr.sekund into a pipeline leading to a turbine plant. Height difference between the magazine and the turbines are 300meter. The turbines provide 0.7 GW power. How large is the efficiency of...

electrical engineering

A 3-ph., 4-pole, 60Hz induction motor is supplied by a 660-V source. At a particular loading, the total power consumed is 65KW and the current drawn from supply is 70A (assume star connection). The rotor speed is 1760rpm. The stator iron losses are 1.2KW, the windage and ...

Organic chemistry

compound with a molecular formula C8H16O has the following H-nmr spectrum: 3H triplet at 0.90, 1.0 to 1.6 8H multiplet, 2.05 3H singlet, 2.25 2H triplet. What is the structure of this compound? I think it is 2-octanone but not sure

Orgo

this is a repost because i am really stuck What is the structure of the magnesium salt that is created as a byproduct of the Grignard reaction: bromobenzene + mg = phenylmagnesium bromide phenylmagnesium bromide + benzophenone = triphenylmethanol

engineering

when i do imaging of tissue to look at collagen structure using a 2 photon microscopy, but im not familiarized with the methods to measure the diameter of the collagen and the area occupied by it. Does anyone know how do researchers measure them

Organic Chemistry

Draw the most important resonance contributor of the following structure or compound. I'd think that the double bonded carbon would be the most important? Am I right? Thank you! h t t p : / / a c e o r g a n i c. p e a r s o n c m g. c o m / e p o c h - p l u g i n / t e m p f...

Organic Chemistry

Use the data below from an electron impact mass spectrum of a pure compound to deduce its structure. Mass Spectrum M/z Relative intensity 66 32 64 100 49 26 29 72 28 83 27 60

Ecosystems

put following terms in order from smallest to largest biome biosphere community ecosystem single species population order 1 single species 2 community 3 population 4 ecosystem 5 biosphere 6 biome

statistics

17. All three‐digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 without repeating the digits are (a) 50. (b) 60. (c) 15. (d) 71. 18. One of the counting rules used to determine the total number of possible outcomes for experiments in which the order of ...

chemistry(check my explanation)

sorry to repost this question but i'm confused on this part The solubility of borax is directly proportional to temperature. Therefore, the sign of H is A. negative B. positive C. unknown with the given information like you said earlier, borax dissolves when heat is added, ...

Math

Find the intervals on which the function is increasing, decreasing, concave up, or concave down and find any local extreme values and inflection points. So I know how to do the above, but not with piece wise functions. Someone help me out? Y={3-x^2, x<0 and x^2+1, x>=0} ...

Math

A satellite which travels around the earth has a power supply that provides power according to the formula: P = 17200/t + 100 where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in watts/day (enter as a positive...

physical science

The exact question how are the following terms related - subatomic particels and atomic mass unit. The heading on the page is review and reinforcement structure of an atom - the three main subtomic particles are the proton, the nuetron and the electron.

English

I am assigned to write a formal essay focusing on the theme of "Mrs Turner Cutting the Grass". Are job is to support our argument with any of the following: plot structure, symbolism, irony, humour, pathos, style or foreshadowing. How do I go about this? Can anyone help me.

Calculus

F(x) = x^5 ln x A) Find the interval on which f is increasing Find the interval on which f is decreasing B) Find the local minimum value of f C) find the inflection point (x,y) Find the interval in which f is concave up Find the interval in which f is concave down

Laws of Physics

A block and tackle has a velocity of 6 and it is being used to raise a mass of 68 newtons through 3 meters. The efficiency is 60% Calculate the amount of energy needed to lift the mass through 3 meters and calculate the amount of energy that was put into the system and the ...

English

Hello. Please tell me if the sentence structures are natural: 1)The crisis affected the world, specifically African countries. 2)..., and specifically African countries. 3)..., African countries specifically. 4)..., in particular African countries. 5)..., Afircan countries in ...

Physics

A boiler furnace releases 10000.000kJ of heat for each kg of fuel burned and produces dry saturated steam at 10000.000kPa from feed water at 190.000 degrees Celsius. How many kg of steam will be produced for each kg of fuel burned if the boiler had an efficiency of 69%? ANS = ...

Chemistry

Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied the ...

Cress Electronic Products manufactures components used in the automotive industry. Cress purchases parts for use in its manufacturing operation of different suppliers. One particular supplier provides a part where the assumptions of the EOQ model are realistic. The annual ...

science

Analysis of forelimb anatomy of humans, bats, and whales shows that humans and bats have fairly similar skeletal structures, while whales have diverged considerably in the shapes and proportions of their bones. However, analysis of several genes in these species suggests that ...

Electricity

when an electron is displaced in a semiconductor, the hole that's left behind is? A)attracted to the negative terminal of the voltage source. B)incapable of carrying a charge. C)attracted to the anode of the voltage source. D)considered an impurity in the crystal. The electron...

English

Hello. Please help me with the following structures: 1)is it possible to use "going to" after "expect" or only "will", for example "it's expected that they are going to discuss" or only "it's expected that they will discuss / will be discussing"? 2)are the phrases possible: a)...

College Chemistry

Which of the following changes generally lead to greater reaction rates? (I)Increasing the temperature (II)Decreasing the concentration of a reactant or (III) adding a catalyst I know that change in temperature influences the reaction, in this case it speeds up and that adding...

calculus 1

f(x) = 3x^3 - 9x + 5 find the: 1) zeroes or undefined values 2) intervals where the function is greater than zero 3) intervals where the function is less than zero 4) coordinates of all maxima and minima 5) intervals where the function is increasing 6) intervals where the ...

maths

For the following graph: a. Find the domain of f. b. Find the range of f. c. Find the x-intercepts. d. Find the y-intercept. e. Find the intervals over which f is increasing. f. Find the intervals over which f is decreasing. g. Find the intervals over which f is constant. h. ...

discrete math

How many strings of five uppercase English letters are there (a) that start or end with the letters BO (in the order), if letters can be repeated? (inclusive or) (b) that start with an X, if letters can be repeated? (c) that start with the letters BO (in that order), if ...

structural isomer?

what is structural isomer? can you alos give me examples? thanks ! Draw the structure pentant (acutally it is n-pentane) out to see it. CH3CH2CH2CH2CH3 H3C     \      CHCH2CH3     / See (if this came out right--usually there ...

Discrete Math

There are 8 black balls and 8 white balls in a box and cannot be seen through: • How many balls must be picked up in order to guarantee there are three balls having the same color • How many balls must be picked up in order to guarantee there are three white balls

calculus

(1 pt) When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C where C is a constant. Suppose that at a certain instant the volume is 390 cm3, and the pressure is 75 kPa (kPa = kiloPascals) and is ...

math

You are the accountant for Suite Dreams, a retail furniture store. Recently, an order of sofas and chairs was received from the manufacturer with terms of 3/15, n/45. The order amounted to \$230,000, and Suite Dreams can borrow money at 13% ordinary interest. How much can be ...

math

. You are the accountant for Suite Dreams, a retail furniture store. Recently, an order of sofas and chairs was received from the manufacturer with terms of 3/15, n/45. The order amounted to \$230,000, and Suite Dreams can borrow money at 13% ordinary interest. How much can be ...

math

You are the accountant for Suite Dreams, a retail furniture store. Recently, an order of sofas and chairs was received from the manufacturer with terms of 3/15, n/45. The order amounted to \$230,000, and Suite Dreams can borrow money at 13% ordinary interest. How much can be ...

English

In the book, Language in Thought and Action 5th edition, by S.I and Alan Hayakawa, what are the main principles? I have a few already: 1)Cooperation is essential in order to have a society. 2)Words aren't the only thing associated with language: tone of voice, rhythm, and ...

stats

Anita's a fast food chain specializing in hotdogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant so it can make decisions reguarding possible construction of the in-store play areas.the attendance of its mascot Stacy at the...

Chemistry URGENT

I have to match the items to the statements below, and I'm stuck! My answers are in parentheses, but I know that some of them are wrong. Please help if you know how...I would GREATLY appreciate it! A Dilute B Unsaturated C Saturated D Supersaturated 1. Sodium acetate solution ...

Chemistry

What is the lewis structure for HBrO4. Also show the VSEPR structure The following, if it turns out ok, is the BrO4- ion.         .. >        :O: >        ..   ..&nbp&...

Science

A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover plants...

Chemistry

These are all review questions for my summer assignment. Do not know: !) Explain what an ionic lattice is and include a diagram. 2)Draw a diagram to show how Na and CL2 combine to form NaCl Unsure: !)Select two compounds and explain when Roman numerals are used in the name of ...

Biology

1. Muscles are grouped in antagonistic sets because: A. muscles cannot lengthen by themselves. B. muscles push but cannot pull. C. they do not like one another. D. there is an increase in metabolic efficiency if they are present in antagonistic sets. is it A 2. In most women's...

Chemistry

A woman expends 96 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 % efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.7 km per liter of gasoline? The ...

Geography

Why would countries be concerned with their population decreasing? Why would countries be concerned with their population increasing?

algebra

Consider the equation 7x + 3y = 42. Part 1: On your own paper, graph this equation using the slope-intercept method. In the space provided, explain, in words, each step of the procedure you used. Make sure to use complete sentences and correct grammar. (3 points) Part 2: On ...

Algebra

Consider the equation 5x + 2y = 30. Part 1: On your own paper, graph this equation using the slope-intercept method. In the space provided, explain, in words, each step of the procedure you used. Make sure to use complete sentences and correct grammar. (3 points) Part 2: On ...

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 by the boxes? NOTE: The boxes are the top number and the circles are the bottom number. The ...

Physics

Question 2. 3 Consider a box that explodes into two pieces while moving with Fig. 9-24 a constant positive velocity along an x axis. If one piece, with mass : m1, ends up with positive velocity v1, then the second piece, with : mass m2, could end up with (a) a positive ...

science

Linear growth a. is characterized by a rapidly growing population. b. is demonstrated by the sequence 12, 13, 14, 15, 16. c. is illustrated by the numbers 2, 4, 8, 16, 32. d. is characterized by resource use and consumption. e. is characterized by a slowly decreasing ...

Dynamics

It takes 16s to raise a 2800lb car and the supporting 650lb hydraulic car-lift platform to a ht of 6.5 ft. Knowing that the overall conversion efficiency from electric to mechanical power for the system is 82% determine a) the average power output delivered by the hydraulic ...

science

Which experimental approach would be the most effective and easiest to clearly determine the evolutionary relationship between these 2 organisms? The 2 organisms are a starfish and snake. A. Sequence the same gene in both species to compare their similarity. B. Dissect ...

math

How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to M). Then, if you ...

The Flow of Energy Through Ecosystems. Then, complete Appendix C and respond to the following: Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare ...

physics

why does an ideal fluid move faster through a pipe with decreasing diameter? a. the pressure within the fluid increases b. the pressure within the fluid decreases c. the pipe exerts more pressure on the fluid d. the fluid moves downhill C? the pressure in a fluid is related to...

math

A 300 kVA transformer has a primary winding resistance of 0.4 Ω and a secondary winding resistance of 0.0015 Ω. The iron loss is 2 kW and the primary and secondary voltages are 4 kV and 200 V respectively. If the power factor of the load is 0.78, determine the ...

Chemistry

Would heating a tertiary alcohol change its structure and reaction with hydrochloric acid and potassium permanganate (KMnO4)? Tertiary alcohols resist oxidation, but can be oxidised by reagents such as 2,3-dichloro-5,6-dicyano-1,4-benzoquinone.

Chemistry

If I am given a molecular hydrocarbon structure, how would I be able to tell how sp3 hybridized carbons it possesses? Like my current question asks How many sp3-hydridized carbon atoms does 11-cis-retinal possess?

bio

How are the various types of blood vessels different in structure? How do these structural differences relate to their functions? Consider the presence of valves, muscular control of constriction and dilation, and the presence or absence of multiple tissue layers.

Bus210

write a 500-750 word paper in apa format describing the structure, business model, and culture of a beauty salon, provide justificationfor why you selected each element and explain how your choice may effect your business?

Chemistry

Suppose MgSe(a=545 pm) and SrSe (a=623 pm) both crystallize with a NaCl (rock salt) structure. Calculate the ionic radius of Sr2+ (Hint:Assume that the Se2- ions actually touch in MgSe.)

PHYSICS

1) A diffraction grating with 2.500 x 10^3 lines/cm is used to examine the sodium spectrum. Calculate the angular separation of the two closely spaced yellow lines of sodium (588.995 and 589.592) in each of the first three orders. 2) A diffraction grating has 1950 lines/cm. ...

computer science(Algorithm)

An m X n YOUNG TABLEAU is an m X n matrix such that the entries of each row are in sorted order from left to right and the entries of each column are in sorted order from top to bottom. Some of the entries of YOUNG TABLEAU maybe ¡Þ, which we treat as nonexistent elements, ...

chemistry

To dissolve an ionic solid in water, you must first disrupt the ionic bonds that are holding the ionic lattice together. This is an endothermic process, yet many ionic solids have an exothermic heat of solution. (Heat is released when the ionic solid is dissolved.) This is ...

math

The side length of a rectangular box with a square base is increasing at the rate of 2 ft/sec, while the height is decreasing at the rate of 2 ft/sec. At what rate is the volume of the box changing when the side length is 10 ft and the height is 12 ft? Remember to use the ...

Science

Cellular examination of a cyanobacterium and a diatom reveals that the diatom has (which structure?) that is absent in the cyanobacterium? a. DNA b. chloroplasts c. plasma membrane d. a cell wall with peptidoglycan e. all of the above

Management 330

Please can you recommend two strategies that organizational managers and leaders can use to create and maintain a healthy organizational structure. 2.Differentiate between Management and Leadership. Thank you

geography

What does this mean? Thank you Colonialism is a process whereby sovereignty over the colony is claimed by the metropole and the social structure, government, and economics of the colony are changed, by colonists - people from the metropole.

biology

Which has more redox energy Lysine or Tryptophan? I was thinking Lysine because it has a long chain C-H and C-C bonds but trypyophan has a cyclic structure that also have lots of C-C and C-H bonds. Please help!

calculus (point me in the right direction please?)

Let V be the volume of the three-dimensional structure bounded by the region 0≤z≤1−x^2−y^2. If V=a/bπ, where a and b are positive coprime integers, what is a+b?

Science

which term best describes the role carbon plays in the structure of compounds present in living things? A- a somewhat important role B- a fundamental role C- a minimal role I think it B.

Discrete Mathematics

In order to look like you are educated and you care about important things, you go to a place that sells books by the foot (these places actually exist; specify the color of books you want, and they send them to you). When your order is delivered, you nd that ordering serious ...

math worksheet named Calculating Codes we are to fill in the correct signs (+ - X etc..) looks like we can't rearragne or create an order of operations other than the order of the signs. the example is 1 2-3+4 5 = 54 1 2 3 4 5 = 60 only need two signs + and + 1 2 3 4 5 = 230 ...

Thermodynamics/ Energy

Determine the effects of compression ratio on the net work output and the thermal efficiency of the Otto cycle for a maximum cycle temperature of 2000 K. Take the working fluid to be air that is at 100 kPa and 300 K at the beginning of the compression process, and assume ...

calculus

The voltage V (volts), current I (amperes), and resistence R (ohms) of an electric circuit are related by the equation V=IR. Suppose that V is increasing at a rate of 3 volt/sec while I is decreasing at a rate of 1/8 amp/sec. Let t denote time in seconds. Determine the rate at...

Science

1.) Why is it important to have a quiet study space? It is easier to concentrate in a quiet space, and concentration is needed to learn. * It is easier to leave all your study material in a quiet study space so you can find it. A quiet study space prevents incorrect ...

English

Hello. Will you please help me with the word order: 1)US forces have killed Osama bin Laden, who with his wives and sons has been living in a luxury compound in Pakistan for many years. (Is "who with" natural here; does "who together with" or "who along with" sound better?) 2)...

Program logic design

• Assignment 1: Chocolate Delights Candy Company, Part 1 Due Week 5 and worth 210 points Chocolate Delights Candy Company manufactures several types of candy. Design a flowchart using Visual Logic for the following: 1. A program that accepts a candy name (for example, “ ...

Chemistry

What is the number of bonding electrons and the number of nonbonding electrons in the structure of BeF2?

Calculus

Let f be the function defined for x >or= to 0 with f(0)=5 and f', the first derivative of f, give by f'(x)=e^(-x/4)sin(x^2). A) Use the graph of f' to determine whether the graph of f is concave up, concave down, or neither on the interval 1.7<x<1.9. Explain your ...

econ

Consider a change in the table in Problem 2-3. The student’s set of opportunities is now as follows: Economics Biology 100 40 90 60 80 75 70 85 60 93 50 98 40 100 Plot this student’s production possibilities curve. Does the PPC illustrate increasing or decreasing ...

Space Science

I can't seem to understand why lunar eclipses occur only twice a year and not monthly. I have looked up a lot of answers, but I don't understand. Thanks for the help.

AP Biology

With regards to photosynthesis, if the following problems occurred, how would photosynthesis be affected? 1.) a.) NADP+ is not present in the thylakoid space b.) CO2 is not available to the plant Thanks

physics

a space shuttle is in a cic ular orbit at a height of 250 km, where the acceleration os earth,s gravity is 93 percent of its surface value. that is the period of its orbit

physics

during space flight, astronauts often refer to forces as multiples of the force of gravity on earth's surface. what does a force of 5g mean to an astronaut?

physics

Two charges q = 3.0ì C are fixed in space a distance d = 4.5 cm apart. With V = 0 at infinity, What is the potential energy U of the three-charge configuration when the third charge is in place?

Physics

A 115kg astronaut throws an 18kg tool kit at 4.6m/s away from a spacecraft in deep space. Show that the astronaut will recoil at a speed of 0.72m/s

space

I'm doing a solar system project for school. The problem I'm facing is that I'm am doing every two feet is 10 astronomical units, but how many 1/8 inch's is one astronomical unit?

Science

If the variation in g between one's head and feet is to be less then 1/100 g, then, compared to one's height ,what should be the minimum radius of the space habitat?

math pre algebra

a kennel owner is buying a new building he want the space for each dog run to be at least 96 square ft the area reserved for the dog ru.s is 30 ft by 60 ft

Stats

a coin is tossed twice, or until the first "tails" appears, whichever comes first. which of the following is the sample space for this random experiment? A, S=(H, T) B. S=(T, HT, HH) C. S=(T, TT)

english

rewrite each sentence to improve emphasis, using guidelines in parentheses the flights of man into space are truly astonishing (inverted sentence)

english

Rewrite the sentence to improve emphasis, using the guidelines in parenthesis. The flights of man into space are truly astonishing (inverted sentence)