Rank the crystal lattice structures in order of decreasing efficiency of space in the structure.
20,908 results, page 42

astronomy
why is it necessary for ultrviolet telescopes to be placed on a spacebased platform? thanks 
physics
how do you compare mass and weight on the earth, moon, and outer space? 
math
List all possible events in the sample space with outcomes A, B, and C. 
Science
What is the measure of the size of a body in a three demensional space is called? 
space
Describe the stages in the life of a star that has a mass 20 times that of the sun. 
space
from 1700 to 1800 the greatest number of sunspots was just over what 
space
choose five elements of the universe and tell why they are amazing and wonderous 
science
what are chunks of iron and nickel that move through space called 
earth/space science
How does length of the year change with distance from the sun? 
geometry
I am a location in space. It takes only one letter to name me 
Advanced 6th grade Math
What is the sample space of expiremental probibility 
Fracture Math word
3/8 of kilogram is something wooden. 4/5 of space is a step.  
Science
The rocks which float in space within the solar system are called? 
science
what is the weight of a 48 kg astronaut in outer space traveling with constant velocity? 
Science(Help NOW, Pls)
how is solar energy used in space and for what purpose? 
Probability
Let A and B be events in a sample space S such that P(A) = 0.6, P(B) = 0.4, and P(A B) = 0.27. Find the probabilities below P(AB) 
space
what is a small body made of rock and ice in the solar system? 
science
How much money does CANADA spend each year on space explorations? thanks 
science
what technologies or what do explorers need to survive a volcano underwater and space? 
science
what is the word for high energy body on outer edge of space 
Calculus
Explain why a line in threespace cannot be represented by a scalar equation. 
Calculus
Explain why a line in threespace cannot be represented by a scalar equation. 
Math
If x = xo and x = x1 are both vector solution of Ax=b, then x1  xo is in the Null Space of A. True or False? 
science
Also is did cassini send out a space probe or satellite? 
Physics
When we lauch a space shuttle will it go with Earths rotationor would it go opposite? 
English
The space shuttle was both a marvel and huge. Parallel Sentencce?.... 
math
Mark flips a coin twice. How many outcomes are in the sample space 
math
Mark flips a coin twice. How many outcomes are in the sample space? 
space
For NY what is the maximum altitude of the sun on March,June,Sept.,Dec. 21 
physics
An astronaut shoots you in space given that the bullet is weightless, could it injure you? 
Science
If you are in a spacecraft that has been launched into space your weight would do what 
geometry
Parallel lines in space are coplanar. A. always B. sometimes C. never 
Science
How did Rutherford come to the conclusion that most of the space in atoms is empty? 
Science
Why is it important for scientists to figure out how much matter is in space? 
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? Is A the correct answer? a) That there is no reaction forcethe net force on the object is zero, so the ... 
Calculus
A spherical snowball is melting so that its diameter is decreasing at rate of 0.1 cm/min. At what is the rate is the volume of the snowball changing when the diameter is 12 cm? 
Minimum and maximum value
Let f(x) be a decreasing the function defined for x>or=0 and f(2a^2+a+1)<or= f(3a^24a+1) then find the minimum and maximum value of a plz help help help!!!show ur work 
Chemistry
When 0.13 g of H2 and 0.18 g of I2 are confined to a 150. mL reaction vessel and heated to 700. K, they react by a secondorder process (first order in each reactant), with k = 0.063 L·mol1s1 in the rate law (for the rate of formation of HI). (a) What is the initial ... 
Physics
A 225 kg box is loaded onto a truck by pulling it up an inclined plane (10 m hypotenuse difference) by a force that is parallel to the incline (T = 315 N). If the bed of the truck is 1.2 m above the ground what is the efficiency of this simple machine in loading the box into ... 
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) 
math
A TOY STORE IS ORDERING 3,000 REMOTE CONTROL CARS.THE STORE CAN ORDER THE CARS IN SETS OF 10.HOW MANY SETS OF 10 DOES THE STORE NEED TO ORDER? 
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... 
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, ... 
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? 
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... 
Electricity
A motor running at its rated power provides 2.6 lbft torque at its rated speed of 2020 rpm. The motor draws 5.6A from a 230V 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 1kg 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 1kg 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 1kg 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. 
Principles of Environmental Engineering
Using a computer spreadsheet you have written, and the data in Problem 11–26, determine the daily and annual sludge production at the following removal efficiencies: 40%, 45%, 50%, 55%, 60%, and 65%. Plot annual sludge production as a function of efficiency 
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... 
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!!!
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
"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 ... 
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 ... 
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 forcethe 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 forcethe 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 forcethe net force on the object is zero, so the reaction force is zero ... 
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." 
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 ... 
chm
Which of the following facts is evidence for the existence of induced dipoleinduced 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 ... 
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 
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 wouldby a factor of 
trig
use the function G(x)=x^38x +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.] 
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... 
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 ... 
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... 
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 leadtime demand follows a normal probability distribution with μ = 25 and σ = 5. 1. What is the recommended order quantity? 2. What are the ... 
Chemistry
What is the structural formulae for the hydrolysis of lactose? Lactose is a disaccharide that consists of âDgalactose and âDglucose molecules bonded through a â14 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. 
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... 
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 ... 
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 ... 
Business
Identify the ROI and NPV of the wireless ordertaking 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 18001850's does any one have any idea what they might be? also. What presidents where president between the 18001850 and what order were... 
2012faCJC111NWB1
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? 
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 110 with 10 being the highest rating. A summary of the survey follows: ... 
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 lifesaving 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 ... 
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 bodycentered cubic structure. What is the edge length of the unit cell?