Tuesday

May 24, 2016
Total # Posts: 2,573

**chemistry/help**

In solid form, what element has the lowest density? Which has the highest density? 1. Hydrogen is the lowest density solid 2.which element has the highest?
*June 3, 2012*

**chemistry / help please**

What is the name of: ZnNO3, of (NH4)2O, of Rb3PO4, or NH4ClO4?
*June 3, 2012*

**PHYSICS**

An applied force accelerates a 50-kg crate along a frictionless floor from rest to 5 m/s.The work performed by this force is most nearly 125 J 250 J(x) 500 J 625 J 1,250 J Can someone please explain this to me and help? I thought it was 250 J but my calculation was wrong.
*June 2, 2012*

**world history**

Why did Queen Mary imprison her half -sister Elizabeth? a-She had converted to Calvinism b- She had led an uprising c- She was beautiful d- She was popular and protestant answer: D correct?
*June 1, 2012*

**chemistry**

the chemical substance called flavin (an anthocyanin) is it write?
*May 28, 2012*

**chemistry**

What chemical substance is in red cabbage which serves as an indicator for acids and bases?
*May 28, 2012*

**world history**

Can you tell me 3 ways that the conclusion of WW1 leads into directly into WW2? thank you.
*May 27, 2012*

**PHYSICS PLEASE HELP**

A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis, respectively. State the ...
*May 27, 2012*

**algebra**

In a canoe race, a team paddles downstream 480 m. in 60 s. The same team travels up stream in 80 s. Find the team's rate in still water and the rate of the current. Please show how the equation is set up to solve
*May 26, 2012*

**algebra**

A jet travels at a rate of 798 mi/hr. with the wind. Going against the wind, the jet travels at a rate of 762 mi/hr. What is the rate of the jet in still air and the the rate of the wind? please show how the equation should be set up
*May 26, 2012*

**ALGEBRA**

Jim paddles a canoe upstream at a rate o 3mi/hr. Traveling downstream, he travels at 8 mi/hr. What is his rate in still water and what is the rate of the current? PLEASE SHOW THE SOLUTION EQUATION
*May 26, 2012*

**math**

5/10=3/5
*May 26, 2012*

**Physics :)**

The vector F is (12.0, −3.00) in rectangular notation. What is this same vector in polar notation? Express the angle as a positive number between 0° and 360°. I got 12.4, just can't get the angle.
*May 25, 2012*

**spanish/help pleaseeeee**

1-trabajaba 2- iban 3-teniamos 4- era 5-cuidaban 6- jugaba 7- nos divertiamos. complete the paragragraph. Cuando yo------ chica,mi vida era muy diferente.Yo nunca----,solo-------con mis amigos. Mis padres-----al trabajo y mis abuelos me-----.Nosostros no -----un televisor, por...
*May 24, 2012*

**finance**

An investor estimates that next year’s sales for New World Products should amount to about $75 million. The company has 2.5 million shares outstanding, gener- ates a net profit margin of about 5% , and has a payout ratio of 50% . All figures are expected to hold for next ...
*May 24, 2012*

**Business Accounting**

The answer is d
*May 24, 2012*

**algebra**

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)
*May 20, 2012*

**ALGEBRA**

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. Assume 365 days in a year. (Round your answer to the nearest cent.) $3,000 balance, 21% ...
*May 20, 2012*

**Odd or Even function?**

f(x)=x^3 + sin x So far.. I've heard it's neither.. But how? Thanks
*May 16, 2012*

**math**

if an office has an area of 120 sqare feet and a perimeter of 44 feet. what are the dimensions of this office.
*May 14, 2012*

**math**

a pie is cut into 8 equel slices. if a person wants 0.75(pie sign) centimetre of crust, about how many pieces should they take?
*May 12, 2012*

**adv functions**

a pie is cut into 8 equel slices. if a person wants 0.75(pie sign) centimetre of crust, about how many pieces should they take?
*May 12, 2012*

**Chemistry**

We apply the same amount of energy to 10.0-g samples of aluminum, and silver which begin at the same temperature.Rank the metals from highest to lowest temperature after the heat is applied.
*May 10, 2012*

**math**

is that just the units?
*May 8, 2012*

**math**

what is rev?
*May 8, 2012*

**math**

The CD player in your computer rotates a disc at 7200rmp. Determine its velocity in: a)degrees per second b)radians per minute
*May 8, 2012*

**math**

1.A child chooses a horse to ride on a carousel. The horse is located 9m from the centre of the carousel. If the ride turns through an angle of 128pie/27 determine the length of the arc travelled by the horse.
*May 8, 2012*

**Grammar**

Thank you so much!!
*May 8, 2012*

**Grammar**

Hello! I am doing a presentation on the green sea turtle. I unsure what part of "green sea turtle" should be capitalized if at all. I am seeing it multiple ways online. Any advice would be greatly appreciated. Thanks!
*May 8, 2012*

**math**

Find a six-digit even number containing no zeros and no repeating digits in which the first digit is four more than the second digit, the third digit is one less than the sixth digit, and the fourth and fifth digits when read as a single number equal the product of the first ...
*May 7, 2012*

**Algebra**

12(2nd power)/24(2nd power)/6(2ndpower)= Simplify I got 144/576/36 is this right?
*May 6, 2012*

**psychology Help**

How did Erik Erikson progress through the hierarchy of needs difined in Maslows theory. So for physiological needs-These include the most basic needs that are vital to survival, such as the need for water, air, food, and sleep. How/what would be an example of Eriks process in ...
*May 6, 2012*

**psychology HeLp**

How did Erik Erikson progress through the hierarchy of needs difined in Maslows theory. So for physiological needs-These include the most basic needs that are vital to survival, such as the need for water, air, food, and sleep. How/what would be an example of Eriks process in ...
*May 6, 2012*

**psychology**

What motivated Erik Erikson to achieve in life? Would his own personal experiences in life be considered a motivation? Example: Changing his last name to make his own identity, his 8 phychosocial stages...
*May 6, 2012*

**Psychology**

Is Maslow's hierarchy universal? Do you see it applicable in other cultures? After reading/researching Maslow's theory of motivation we all share a compelling need to "move up", to improve ourselves, and than we become self-actualized. So to me this would not...
*May 6, 2012*

**Physics**

A massless string is wrapped around a cylinder of mass 0.400 kg and radius 0.100 m. The string is attached to the ceiling. The cylinder is released. As it falls, the string unwinds. What is the magnitude of the acceleration of the cylinder as it falls in m/s2? A.3.27 B.6.54 C....
*May 4, 2012*

**Physics**

A pendulum is composed of a mass m suspended from the ceiling by a massless string of length L. If the mass is pulled back so that it is raised an amount L/4 and then released, what is the tension on the string at the bottom of the swing? A.3 mg B.4 mg C.2 mg D.5/2 mg E.3/2 mg...
*May 4, 2012*

**geometry**

how to write an equation in slope intercept form of the line through point P(8,20 with slope 4?
*May 3, 2012*

**math**

for the equation y = 1x - 25, will the value of y increase or decrease as x increases?
*May 2, 2012*

**algebra**

2x+8y-8z-22 x+2y-2z=3 5x+7y+z=-13 solve by gaussian elimination
*May 1, 2012*

**algebra**

a can of soda at 80 F is placed in a refrigerator that maintains a constant temperature of 37 F the temperature T of the soda t minutes after it is placed in the refrigerator is given by T(t)=37+43e^-0.058t find temp to the nearest degree of the soda after 7 minutes when to ...
*May 1, 2012*

**Advanced Algebra**

yes
*April 30, 2012*

**Math**

can you guys help me with this one problem? Thanks a bunch! Problem: Draw a circle whose center is at (1,2) so that the point (1,5) is a point on the circle. What is the circumference of the circle. I don't get this so please help!!!
*April 25, 2012*

**ALGEBRA**

x(x+2)=528 x^2+2x=528. At this point complete the square (x+1)^2=529 x+1=+/-square root 529 x=-1+/-23 The two solutions are 22,-24. Remember that is wants even integers. 22(24)=528
*April 25, 2012*

**Transportation and Security**

what are potential vulnerabilities of airplanes?
*April 22, 2012*

**transportation and cargo**

would these agencies have the biggest impact on global transportation security post 9/11. • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border Protection (CBP) • U.S. ...
*April 22, 2012*

**transportation and cargo security**

Thank you.
*April 22, 2012*

**transportation and cargo security**

what agencies had the biggest impact on global transportation security post 9/11. would this be like... • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border Protection (CBP...
*April 22, 2012*

**Microeconomics**

The answer is $4,000
*April 22, 2012*

**chemistry**

so d then
*April 21, 2012*

**chemistry**

A reaction will be nonspontaneous under all conditions when a. delta G is negative b. delta H is negative and DS is positive c. delta H is positive and DS is negative d. delta H is positive independent of the value and sign of DS e. delta S is positive independent of the value...
*April 21, 2012*

**chemistry**

not getting right answer how do you set it up?
*April 21, 2012*

**chemistry**

Calculate the value of ()Go for the following reaction , given the standard free energies of formation listed below each ion. Ag(SO3)_2^3- -> Ag+ + 2SO32- delta Gf, kJ/mol = -943 +77 -497 a. - 1860 kJ b. – 128 kJ c. + 26 kJ d. - 369 kJ e. + 523 kJ help no idea
*April 21, 2012*

**chemistry**

delta G for a reaction can be calculated from 1. delta Gf data 2. delta Hf and delta S data 3. equilibrium constants a. only 1 or 2 or 3 b. 1 & 2 only c. 1 & 3 only d. 2 & 3 only e. 1, 2 & 3 help
*April 21, 2012*

**chemistry**

delta G for a reaction can be calculated from 1. delta Gf data 2. delta Hf and delta S data 3. equilibrium constants a. only 1 or 2 or 3 b. 1 & 2 only c. 1 & 3 only d. 2 & 3 only e. 1, 2 & 3 help
*April 21, 2012*

**chemistry**

Free energies of formation are a. always positive b. always negative c. never zero d. measured at 298K e. more than one response above is correct help thinkin a though
*April 21, 2012*

**chemistry**

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...
*April 21, 2012*

**chemistry**

still not getting ans
*April 21, 2012*

**chemistry**

the new delta s= .128 81.2-(227x.128)=52.144 52.144=-rtlnk what is rt?
*April 21, 2012*

**chemistry**

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...
*April 21, 2012*

**chemistry**

For a particular reaction delta G is more negative than delta H. This means that a. delta S is zero. b. deltaS is negative c. delta S is positive d. delta S is negative if delta H is positive. e. delta S is negative if delta H is negative. i thought it was c?
*April 21, 2012*

**chemistry**

how do i set this up?
*April 21, 2012*

**chemistry**

The standard molar entropy value of N2 (g) is 191.5 J/K-mol, of O2 (g) is 205.0 J/K-mol and of NO2 (g) is 240.0 J/K-mol. From these values we can calculate the Delta S for the reaction N2 (g) + 2 O2 (g) produces 2 NO2 (g) to be a. – 156.5 J/K b. 636.5 J/K c. 15.5 J/K d...
*April 21, 2012*

**chemistry**

so d?
*April 21, 2012*

**chemistry**

q1=c q2 what am i looking for?
*April 21, 2012*

**chemistry**

q1)Which entries below should have the highest standard molar entropy? a. SiCl4 (s) b. CCl4(l) c. CCl4 (g) d. SiCl4 (l) q2) For the above, which should have the next highest standard molar entropy?
*April 21, 2012*

**math**

Area A sequence of smaller squares is formed by connecting the midpoints of the sides of a larger square. (a) If the area of the largest square is 1 square unit, determine the first five terms of a sequence that describes the area of each successive square. (b) Use a formula ...
*April 20, 2012*

**math**

Amit investment $750 at 8.2% per year and $1,300 at 4.9% per year.Both investments earn simple intrest.Whoch investment earns more simple intrest in a year? Show your work.
*April 17, 2012*

**Transportation and Cargo Security**

This is what I have so far... We have a strong and efficient transportation system which provides businesses with access to materials and markets, and provides people with access to goods, services, recreation, jobs, and other people. The U.S. transportation system includes ...
*April 15, 2012*

**Transportation and Cargo Security**

THIS IS THE FULL QUESTION I AM ASKED TO DO. Identify an asset such as an airport or a shipping company within the global transportation system. Develop and describe a security system that you feel would be most appropriate to protect the assets of the organization selected by ...
*April 15, 2012*

**Transportation and Cargo Secuirty**

THIS IS THE FULL QUESTION I AM ASKED TO DO. Identify an asset such as an airport or a shipping company within the global transportation system. Develop and describe a security system that you feel would be most appropriate to protect the assets of the organization selected by ...
*April 15, 2012*

**Transportation and Cargo Secuirty**

So I could put Austin Straubel International Airport at Green Bay
*April 15, 2012*

**Transportation and Cargo Secuirty**

Identify an asset such as an airport or a shipping company within the global transportation system. What does this mean? What is an asset of an airport or shipping company?
*April 15, 2012*

**transportation and cargo security**

I think I am thinking too much into this assignment. I was thinking thats what to write but than I second guess myself. Thank you for your help!
*April 15, 2012*

**transportation and cargo security**

Im chose to write about Air travel and I don't understand what it is ment by the public utilization of the system.
*April 15, 2012*

**transportation and cargo security**

Research the various U.S. transportation systems and identify the appropriate one to use for your case study. Research the selected system carefully and prepare a brief summary. The summary should include the following: An introduction to the system. Public utilization of the ...
*April 15, 2012*

**division of decimals**

.160416 divided by 4
*April 12, 2012*

**Statistics**

Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores:
*April 9, 2012*

**Honors Chemistry**

1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12...
*April 6, 2012*

**Math**

A warranty identification number for a certain product consists of a letter of the alphabet followed by a seven-digit number. How many possible identification numbers are there if the first digit of the seven-digit number must be nonzero?
*April 3, 2012*

**government**

B: Tort law definition: "A civil wrong, other than a breach of contract, which the law will redress by an award of damages."
*April 2, 2012*

**math**

there are 5 balls in a bag.3 are white and 2 are blue. what part is white?
*April 1, 2012*

**chemistry**

A compound weighing 115 g contains 68.3 g of carbon, 13.2 g of hydrogen, 15.9 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound?
*March 30, 2012*

**statistics**

Assume that a sample is used to estimate a population proportion p. Find the margin of error. 95% confidence; n = 250, x = 130
*March 27, 2012*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012*

**statitics**

Suppose that a sample of n = 1,600 tires of the same type are obtained at random from an ongoing production process in which 8% of all such tires produced are defective. What is the probability that in such a sample 150 or fewer tires will be defective
*March 27, 2012*

**statistics**

Suppose that SAT scores among U.S. college students are normally distributed with a mean of 450 and a standard deviation of 150. What is the probability that a randomly selected individual from this population has an SAT score at or below 600?
*March 27, 2012*

**statistics**

Jack’s ACT score is 30. Jason’s SAT score is 950. Who did better? The mean SAT score is 1000 with a standard deviation of 100 SAT points. The mean ACT score is 22 with a standard deviation of 3 ACT points
*March 27, 2012*

**Calculus**

Find the volume of the solid formed when the area bounded by x^2-y^2=9, y=x+5, and the x axis is rotated about x=1.
*March 27, 2012*

**Math**

Boys have to be either 3, 6, 9, or 12 because you have to be able to take 2/3 of them and get a whole number. The number of girls for each of these cases is 10, 7, 4, 1. You have to be able to take 1/4 of this number and also get a whole number, 4 is the only one that works so...
*March 27, 2012*

**Math 8 **

6 1/2 joules. particles looses 0.08 joule of energy every 15 seconds what will energy after 4 minutes. Would this be 6 1/2 - 1.28 divide by 4
*March 25, 2012*

**Math 8 **

how do you dilate a figure under 1
*March 25, 2012*

**Math**

6 divided by 1.00 will tell you how much each one is.
*March 25, 2012*

**chemistry**

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
*March 24, 2012*

**chemistry**

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
*March 24, 2012*

**math**

alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.
*March 22, 2012*