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

20,691 results, page 42

Physics :D

An electric motor is tested and found 76% efficient. if the input work is 400 J, what is the motors output work? A ramp has a length of 4m and a height of 1.5m. If a man pushes a 40N crate to the top of the ramp with a force of 60N, what is the efficiency of the ramp? How do I...

astronomy

Hydrogen accounts for 71% of the Sun's mass today. If only one tenth of that Hydrogen burns into Helium, how long could the Sun keep shining at its present luminosity? Note that Hydrogen fusion has an efficiency of about 0.7% Time in years:

math

A kite 75\text{ft} above the ground moves horizontally at a speed of 4\text{ft/s}. At what rate is the angle between the string and the horizontal decreasing when 250\text{ft} of string has been let out? Answer (in radians per second)

geometry

ma is ordering an ice cream dessert. She must order a size, a flavor of ice cream, and a topping. There are sizes, flavor, and toppings to choose from. How many different ice cream desserts could she order?

Macroeconomics

9. In each of the following cases, explain whether you think the situation is efficient or not. If it is not efficient, why not? What actions would make the situation efficient? a. Electricity is included in the rent at your dorm. Some residents in your dorm leave lights, ...

Electricity

A motor running at its rated power provides 2.6 lb-ft torque at its rated speed of 2020 rpm. The motor draws 5.6-A from a 230-V supply at a phase angle of 37 degrees. Determine the following: The horsepower delivered by the motor, The efficiency of the motor.

physics/ math

Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

Physics

container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?

Physics

container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?

Science

container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?

Physics

A particular microwave oven operates at 1000W. The wavelength of the microwave is 12.0cm. You decide that you like your snack to absorb 1.2 x 10^28 photons. For how much time should you have the oven on- with your snack inside of course. Assume 100% efficiency.

Language Arts

Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snowsticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanch happens when the gravity of snow ...

Chemistry

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M are IE1 = 785...

Plz someone Chem Urgent Help

The overall energy involved in the formation of CsCl from Cs(s) and Cl2 (g)is - 443 kj/mol. Given the following information: •heat of sublimation for Cs is +76 kj/mol, •bond dissociation energy for ½ Cl2is +121 kj/mol, •E(11) for Cs is +376 kj/mol, and •E(a) for Cl2is...

CHECK ANSWERS for geometry

1. Why are points and lines hard to define? A point you can't move at all, a line you can only move back and forth in the same direction. Does drawing a point or a line accurately illustrate its characteristics? 2. What do we mean when we say a point exists in zero dimensions...

Business Communications

Which of the following sentences uses passive voice appropriately? A:"Your order was shipped yesterday and should arrive Friday." B:"The shipping clerk sent your order yesterday and it should arrive by Friday." C:"The decision was made after much debate and deliberation."

Chemistry

"Is the following species a dipole?" NH2Cl I have drawn out the lewis dot structure of the molecule and the electronegativy values I have are N- 3.0 Cl- 3.0 H- 2.1 I know that the electronegativity difference between N and Cl is 0 and the bond is non polar. In my structure, I ...

Chemistry!!!

1.)The silica that makes up the stationary phase in TLC chromatophraphy is more polar than the mobile phase. What then might the relative positions of the analgesics on the developed TLC plate tell you about the polarity of these molecules? Does this match the expectations ...

chemistry

the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

chemistry

the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

chemistry

the reaction A+3B—>2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled and the concentration of B is halved the rate of the reaction would---------------by a factor of-----------

Differential Equations

(a) Let S be the set of solutions y(t) to the differential equation dy/dt = -y for t> 0. With addition and scalar multiplication of elements defined in the usual way, is S a vector space? (b)Let T be the set of solution y(t) to the differential equation dy/dt = 1 - y for t...

sociology

I am writing a concept paper. I am suppose to pick a topic and highlight it from a macro ad micro sociological perspective. I have chosen to focus on public transportation and how the people on a train barely interact with each other. I am good on the micro part of the ...

value

An Effort Of 250N Raises A Load Of 1000N Through 5m In A Pulley System.If The Effort Moves 30m,what Is; (a)the Work Done In Raising The Load (b)the Work Done By The Effort (c)the Efficiency

physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...

physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...

physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...

English expression

Playing the dice game, write down suitable responses and have a conversation. (They work in pairs playing the dice game. However, they use just one die.) You work in pairs. One student should throw the die. If it has one, he should move forward one step. And place the marker ...

trig

use the function G(x)=x^3-8x +1 b) identify and verify the y intercept of G c) estimate the zeros of G to the nearest tenth d) estimate the coordinates of the relative extrema of G to the nearest hundredth e)in what intervals is G positive? Negative? f) in what intervals is G ...

calculus

A ladder 25 m long leans against a vertical all. If the lower end is being moved away from the wall at the rate 6m/sec, how fast is the height of the top decreasing when the lower end is 7m from the wall?

Math

Charlotte is training for a marathon. Right now she is 21km from home. She is running toward home at a rate of 10 km per hour.(Let x=time(in hours); y=distance from home (in km).) [lHint: Charlottle's distance from home is decreasing.]

chm

Which of the following facts is evidence for the existence of induced dipole-induced dipole interactions between molecules? Answer >>>Ions in water become surrounded by water molecules and this is what we observe as "dissolving." Water freezes into a solid made up of ...

science

a river does 6500J of work on a water wheel every second.The wheels efficiency is 12 percent.A)How much work in joules can the axle of the wheel do in a second? B)What is the power output of the wheel?

physics

A Norwegian hydroelectric power plant is built on a small river. The water falls 400m from the mountains to the turbines. The flow is 80 m3/s. Calculate: a) the produced electric power; b) the value of production of one day (unit price = 10 cnt/kWh). The efficiency of ...

English,maths,physics,chemistry

Topic:machine,a block and tackle of 6 pulleys is used to raise a load of 300N steadily through a height of 30m.if the work done against friction is 2000J. calculate:the work done by effort,the efficiency of the system,the applied effort.

physics 2

a certain 12v storage battery with an internal resistance of 12 ohms delivers 80 A when used to crank a gasoline engine. if the battery mass is 20 kg and it has average specific heat of 0.2 kcal/kg K. what is its rise in temperaure during 1 min of cranking the engine. assume ...

statistics

2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The price of cars is normally distributed. a. What is a Z score for a car with a price of $ 33,000? b. What is a Z score for a car with a price of $30,000? c...

quantitative methods for business

A product with an annual demand of 1000 units has Co = $25.50 and Ch = $8. The demand exhibits some variability such that the lead-time demand follows a normal probability distribution with μ = 25 and σ = 5. 1. What is the recommended order quantity? 2. What are the ...

Physics

We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)

algebra

A flying saucer filled with space aliens landed in my front yard!After the entire crew had filled out of their spaceship, I happened to count their heads and feet. I saw a total of 91 heads and 124 feet. It was clear that their leader was a purple creature with three heads and...

Chemistry

What is the structural formulae for the hydrolysis of lactose? Lactose is a disaccharide that consists of â-D-galactose and â-D-glucose molecules bonded through a â1-4 glycosidic linkage. So if you are referring to the hydrolysis to the individual saccharides then you need ...

Chemistry

All the noble gases except helium crystallize with fcc structures. Derive an equation relating the atomic radius to the density of an fcc solid of given molecular weight and apply it to deduce the atomic radii of the noble gases.

Business

Identify the ROI and NPV of the wireless order-taking system. Provide all calculations for the ROI and NPV in the speaker notes. Discuss some of the intangibles Lisa needs to consider and make a recommendation as to whether Lisa should order such a system.

u.s history

my question kind of has 2 parts. first off i am trying to put in order what i think are the 10 most important things that happened between 1800-1850's does any one have any idea what they might be? also. What presidents where president between the 1800-1850 and what order were...

2012faCJC-111-NWB1

Why is public order necessary? Do we have enough public order or too little? How can we tell? What might a large, complex society such as ours be like without laws and without a system of criminal justice? Would you want to live in such a society? Why or why not?

math

Image that the last U.S. census indicated that there is a major shift in our population where the northwest states are decreasing in population and the southwest states are increasing in population by more than 3 million. Discuss how this might affect the apportionment of the ...

Microecomices

In each of the following cases, explain whether you think the situation is efficient or not. If it is efficient , why not? What actions would make the situation efficient? (a) Electricity is included in the rent at the your dorm. Some of the resdients in your dorm leave lights...

Science

A man drinks a bottle of beer and proposes to work off its 460 kj by exercising with a 20 kg barbell. If each lift of the barbell from chest height to over his head is through 60 cm and the efficiency of his body is 10 percent under these circumstances, how many times must he ...

chemistry

A first order reaction and a separate second order reaction both have the same rate of reaction. What is the effect on the rate of reaction for each reaction if the concentrations of reactants in both reactions are halved?

Ethics

is it ethical to require patients to participate in a clinical trial in order to obtain, or have a chance of obtaining, an unproven but potentially life-saving treatment? Im not certain.. It would be unethical to use people in a developing country as research subjects in order...

anatomy physiology/check please

Muscular dysgenesis or dysgeny is a lethal, recessive, genetic disease of mice that is caused by a mutation in the mdg gene. Skeletal muscles from dysgenic mice are paralyzed and the animals die shortly after birth. You are a research scientist interested in the finding the ...

History

The Thirteenth, Fourteenth, and Fifteenth Amendments reflected the growing 19th century American trend of A) granting universal manhood suffrage. B) upholding rights of free speech and religion. C) decreasing the power of the Federal government. <my cheese D) recognizing ...

business statistics

A marketing research firm is conducting a survey to determine if there is a difference in consumer choice in the selection of two rival soft drinks. Those surveyed were asked to rank the taste from 1-10 with 10 being the highest rating. A summary of the survey follows: ...

science

how would i draw the structure of a dipeptide which is made up of the following; Glycine and phenylalanine? please could somebody point me in the right direction?

sociology

G. William Domhoff's view of the power structure of the United States most closely resembles the analysis of which sociological perspective?

English

What does it mean when an author uses a chronological and necessarily episodic structure to keep their main character at the center of all action.

sociology

Why do we need a distinction between culture and structure? How is this related to other perspectives like conflict, ethnocentrism, or cultural relativism.

math

describe the effect of cost structure on profitability, including recommendations for each company given the current economic environment, as you understand it

Gen Chem

Barium has a radius of 224 pm and crystallizes in a body-centered cubic structure. What is the edge length of the unit cell?

Organic Chemistry

If 3-bromo-1-propanol is treated with NaOH, a compound of molecular formula C3H6O is formed. suggest a structure for this product.

grammar

When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects. what is the correct parallel structure

physical science

Would you expect magnesium or calcium to be the more active metal? Explain your answer in terms of atomic structure.

english

What grammatical structure is the italicized portion of the sentence? My most valuable coin, one from Spain, is worth more than $100.00.

Chemistry

Can someone help draw/explain the Lewis Dot Structure for OPBr3. I've tried different things, but none of them seem to work.

English

Is this correct parallel structure?... When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects....

English

Is this correct parallel structure?... When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects....

chemistry

Indicate which of the following quantum states are allowed and which are disallowed under the rules governing the electronic structure of atoms. n = 2, l = 1, ml = 0, ms = ½ n = 3, l = 3, ml = -2, ms = -½ n = 4, l = 3, ml = -2, ms = ½ n = 3, l = 2, ml = 2, ms = ⅓ n = ...

physics

for the uniform T shaped structure with mass 3M moment of inertia about an axis normal to the plane & passing through O would be

Physics

1) Please describe the structure of a hurricane,and how they work. Include a discussion of how energy is transferred from the warm ocean water up to the sky.

chemistry

Give a structure to match the name for the following compound. isobutyl alcohol Express your answer as a condensed structural formula.

chemistry

How many dots should be indicated in the electron dot structure of arsenic? How many electrons are in the highest energy orbital of the element copper?

Genetics

My bad! I put the wrong question! Here we go, the shortened one! ~~~~~~~~~~~~~~ How do nucleotides and hydrogen bonds affect the structure of DNA. ~~~~~~~~~~~~~~

History

I'm really sorry, I read some of it in the links. But now, how exactly am I supposed to explain it, having trouble with the structure of writing.

Biology

In what way are bacteria and fungi similar? Ecological function Cell wall components Design of the nucleus Ribosome structure help

english

You are evaluating this when you are looking for a clear, compelling message. A. Use of quotes B. Structure C. Length of speech D. Speaker commitment to subject

structure of writing

Which word in this sentence should begin with a capital letter? I thought that judge Friedman made the right decision

science

A crane whose motor has a power input of 5.0 kW lifts a 120-kg load of bricks through a height of 30m in 90s. what is the efficiency of the crane, which is the ratio between its output power and its input power.

physics

The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? (in oC).

physics

The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? (in oC).

Quantitative analysis

3. A service station owner sells Firm-on-the-road tyres which are ordered from a local tyre distributor. The distributor receives tyres from two plants, A and B. When the owner of the service station receives an order from the distributor, there is a 0.5 probability that the ...

calculus

at a given instant the legs of a right triangle are 5cm and 12 cm long. if the short leg is increasing at the rate of 1cm/sec and the long leg is decreasing at the rate of 2cm/sce, how fast is the area changing

math

. Given the following function, f(x)=-x^2 -8x find: (a) vertex, (b) axis of symmetry, (c) intercepts, (d) domain, (e) range, (f) intervals where the function is increasing, (g) intervals where the function is decreasing, and (h) the graph of the function. Please show all of ...

Math

A souvenir consisting of a cube with an inserted sphere is made to represent Earth. Both pieces are made out of solid crystal. The sphere replaces one quarter of the volume of the cube. Calculate the volume of the souvenir piece. The sphere has diameter of 4 cm and the cube ...

CRT205

Please check to see if I have this correct. Premises: The desire to incarcerate juveniles with adults is based on public fear. Premises: The public fears that juvenile crime is increasing. Conclusion: However, crimes committed by youth are actually decreasing

Math

A surface ship is moving in a straight line (horizontally) at 8km/hr. At the same time, an enemy submarine maintains a position directly below the ship while driving at an angle that is 20 degrees below the horizontal. How fast is the submarines altitude decreasing?

chemistry

a) Define the following terms: • Electronegativity • Bond polarity • Ionization energy b) What is the difference between ionic bonds, covalent bonds and polar covalent bonds? Give two examples of each c) Draw Lewis structures for each of the following: • BF3 • BF4...

Research and Statistics

2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The price of cars is normally distributed. a. What is a Z score for a car with a price of $ 33,000? 9.415000 b. What is a Z score for a car with a price of $...

Physics

A proposed interstellar space vehicle comprises an accommodation unit of mass 690 Tons at the front, separated by a light tube between the individual centres of mass, which is 43m. The amount of seperation is necessary to reduce levels (from the nuclear engine) at the ...

Social Studies / World Civilizations

In the initial years after the wars of independence, Latin Americans: A. Had driven out their colonial rulers B. Challenged the colonial economic and social structures C. Capitilized on popular, grassroots movement to effect social changes D. Both B and C Please help with a ...

Chemistry

True/False 1. Diatomic molecules contain two atoms?T 2. Electrons travel in pairs? T 3. The energies needed to break chemical bonds can be measured T 4. Bonding involves all the electrons in an atom T 5. Lewis structures are used to describe bonding? F 6. More than one pair of...

Algebra

A machine has a work output of 28ax^5 joules and a work input of 7a^2x^6 joules. What is the efficiency of the machine?

ALGEBRA1

Consider the equation 4x + 6y = 48. 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. Part 2: On your own paper, graph this equation using the intercepts method. In ...

ALGEBRA1

Consider the equation 4x + 6y = 48. 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. Part 2: On your own paper, graph this equation using the intercepts method. In ...

math

every row and column contains the same numbers and the same math signs, but they are arranged in a different order each time. can you find the correct order to arrive at the finals totals shown. only using 4 8 3 5 and * + - to make 31 15 20 21 9 17 11 27 ...but you only can ...

math

every row and column contains the same numbers and the same math signs, but they are arranged in a different order each time. can you find the correct order to arrive at the finals totals shown. only using 4 8 3 5 and * + - to make 31 15 20 21 9 17 11 27 ...but you only can ...

math

every row and column contains the same numbers and the same math signs, but they are arranged in a different order each time. can you find the correct order to arrive at the finals totals shown. only using 4 8 3 5 and * + - to make 31 15 20 21 9 17 11 27 ...but you only can ...

algebra

You are planning an ornamental garden that has a total area of 200 square feet. There are two sizes of ornamental plants you have chosen for your garden. Each small plant requires 2.5 square feet of space and each large plant requires 8 square feet of space. This situation can...

Computer programming

problem: Write a program that accepts your first name then displays it content in reverse order. Ex: Enter your name: Michael Your name in reverse order: Leahcim can anyone write the code? this is C programming language.. thanks a lot..

polarity

hexane acetone water methanol -order from most to least polar... ~water/methanol, acetone, and hexane.. I can't decide which order does the 3 first go in... Help please...

English

1. Which of the key reading skills for reading informational articles involves looking for key words and phrases in a text before reading the text? A. identifying main idea and supporting details B. previewing C. skimming and scanning D. understanding text structures

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