# Posts by lee

Total # Posts: 897

**Chemsity**

will calcium metal be oxidized by sr2+?

*January 30, 2017*

**Physics**

An amount of ideal gas is placed in a sealed rigid cylinder. The container is initially placed in boiling water. It is quickly removed and placed in ice-water bath. Draw this thermodynamic process on a PV diagram. If the question change to An amount of ideal gas is in a ...

*January 28, 2017*

**physics**

Vi=5.0m/s upwarrd vf=0.0m/s a=-9.8m/s/s d=? Vf2=Vi2+2ad d=(Vf2-Vi2)÷2a =25÷?2x9.8?=1.27m

*January 22, 2017*

**Physics**

Three vessels have different shapes, but the area of their bottom surface is the same, and all three are filled with water with the same depth (1.|_| 2.\_/ 3./_\ ). Rank the magnitudes of the net forces exerted by the water on the bottom surface.

*January 22, 2017*

**maths**

Good eggs 150-30=120 ratio 120÷30

*January 21, 2017*

**Math**

I don't understand stand this 20y+1.50x=?????

*November 10, 2016*

**Social Studies**

How were the economies of the Nothern and Southern states different? How were they the same?

*November 3, 2016*

**I need help, I'm stuck...what is the correct answe**

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 0 4 2 5 2 6 1 7 2 8 3 9 0 10 4 The mean score on this test is: 6.5 The median score on this test is: 7.5

*October 24, 2016*

**Frequency-Math**

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 0 4 2 5 2 6 1 7 2 8 3 9 0 10 4 The mean score on this test is: The median score on this test is

*October 23, 2016*

**Measures of Central Tendency**

I did and the anwer was wrong?

*October 22, 2016*

**6th grade math**

I'm confused?

*October 17, 2016*

**6th grade math**

A camera is capable of snapping three fourts of a pic per second. How long will it take the camera to snap 6 pictures?

*October 17, 2016*

**Geology**

Which of the following is consistent with the plate tectonic theory? Which of the following is consistent with the plate tectonic theory? A. Lithosphere convection drives mantle movement. B. As a plate sinks into the asthenosphere, it pulls the trailing plate along. C. Lunar ...

*October 16, 2016*

**Math**

A population of 41,250 increases each year by 2%

*September 23, 2016*

**Physics**

A person driving her car at 45km/h approaches an intersection just as the traffic light turns yellow. She knew that the yellow light lasts only 2s before turning red,and shi is 28m away from the near side of the intersection. Should she try to stop,or should she speed up to ...

*September 17, 2016*

**Adding intergers and their application**

If the temperature was 55 degrees at 3pm what is the temperature at 11pm

*September 15, 2016*

**SS**

Answer Choice

*August 19, 2016*

**college algebra**

A study found that athletes who rested after exhausting exercise had half life of lactic acid removal about 23 minutes. How long would it take to remove 90% of the lactic acid?

*July 3, 2016*

**Math**

How do I write the equation for this: sum of ten and nineteen

*June 25, 2016*

**Math**

How do I write the equation for this: sum of ten and nineteen

*June 25, 2016*

**QUS 103**

A locomotive of mass 20000kg is traveling at a speed of 54km/hr on a straight track.if a breaking force of 250N per turn is applied .how far will the locomotive travel before being brought to rest? My solution:v=0 u=15m/s S=? F=250 M=20000 F=ma 250=20000×a a=250/20000 =0...

*June 14, 2016*

**history**

What was the main goal of Greek colonization in the archaic period

*June 10, 2016*

**math**

car gets 19 miles to the gal at let's say $3 per gal, taking an 8.5mi trip. How much does this trip cost?

*June 4, 2016*

**CIVICS PLS HELP MS. SUE!!!**

Imagine a pasture in a small town with grazing sheep owned by several farmers. Every farmer profits by increasing the number of sheep he has on the pasture. However, the pasture can hold only so many sheep before it runs out of grass for the sheep to eat. If that happens, the ...

*May 20, 2016*

**Algebra**

How do I solve this? A plane flying the 3458-mi from New York City to London has a 50-MPH tailwind. The flight's point of no return is the point at which the flight time required to return to New York is the same as the time required to continue to London. If the Plane'...

*May 9, 2016*

**Math**

Thank you

*April 25, 2016*

**Math**

I mean which equation, my teacher said I could only use one

*April 25, 2016*

**Math**

I just need the equation

*April 25, 2016*

**Math**

Federico needs to frost 36 cupcakes for a party. He has already frosted 23 cupcakes and wants to know how many more he has to frost. He writes the following two equations to represent the problem, but does not know which equation is correct: 23 + c = 36 36 - c = 23 Which ...

*April 25, 2016*

**math**

In triangle XYZ,A is the midpoint of YZ. The bisector of the exterior angle at X of XYZ cuts YZ produced at B. The line through A parallel to XB, cuts XY at P and XZ produced at Q. 1. PY= QZ

*April 25, 2016*

**MATH**

What would be the circumference of a cylinder that has a height of 8 inches and a radius of 1.6?

*April 25, 2016*

**math**

So ms sue I have one more problem but I think I figured this on out, I just want to verify it is right! The formula used to calculate the volume =l*w*h same surface area 93.5 but the dimentions of the prism H= 10 inches from measuring the perimeter of the base is 2 inches so ...

*April 23, 2016*

**math**

Thank You so much!

*April 23, 2016*

**math**

So to find the volume it would be L*W*H H=8in x w=2.5 x L=2.5 =50 cubic inches

*April 23, 2016*

**math**

I need to find the volume so I need help in finding the length

*April 23, 2016*

**math**

Yes the surface area is 93.5 inches from what I iunderstand as the dimentions of the paper 8.5 inches by 11 inches

*April 23, 2016*

**math**

The area of a rectangular prism is 93.5 inches The height of the prism is 8 inches and the width is 2.5 inches I need help in finding the length of the rectangular prism

*April 23, 2016*

**Algebra**

TeaPots n Treasures sells loose Oolong tea for $2.15 per ounce. Donna mixed Oolong tea with shaved almonds that sell for $0.95 per ounce to create the Market Street Oolong blend that sells for $1.85 per ounce. One week, she made 300 oz of Market Street Oolong. How much tea and...

*April 7, 2016*

**Math**

A picture frame is 6 1/2 inches wide. The ratio of the length of the frame to the width is 3:2. What is the length of the frame in inches?

*April 7, 2016*

**english composition ll**

Which of the following best illustrates a positive feedback loop?

*April 6, 2016*

**Physics**

In the series circuit, if the current through R1 is 1.5 A, what is the current through R2? 1. Unable to determine 2. 1.5 A 3. 1 A 4. 0.5 A 5. 3 A

*February 24, 2016*

**Physical sciences**

Two forces A and B act at a point O. A=30 N at 60 degree and B= 40 N at 120 degree, relative to x-axis. Calculate the magnitude and direction of the resultant force using the method of perpendicular components.

*January 26, 2016*

**Language arts**

Change possessive to it's longer form. Paul rings the church bells at a moment's notice.

*January 21, 2016*

**English**

How would I change this sentence to possessive long form? Paul rings the church bells at a moment's notice.

*January 21, 2016*

**Language arts**

How would I change this sentence possessive to long form? Paul rings the church bells at a moment's notice.

*January 21, 2016*

**College algebra**

Show me how to solve x^4-1=0?

*January 19, 2016*

**Math**

Measuring across a 14 inches how many square inches is in the circle

*January 15, 2016*

**maths**

A bag contains six blue and 4 red balls ,3 balls are drawn at random replacement what is expected no.of red balls that can be drawn?

*December 13, 2015*

**chemistry**

ΔH°rxn is -114.14 kJ/mol. Calculate ΔH°f of gaseous nitrogen monoxide, given that ΔH°f of NO2(g) is 33.90 kJ/mol.

*December 7, 2015*

**Math**

25% of my candies are chocolate candiea i had 25 chocolate candies. How many candies did i have altogether?

*November 17, 2015*

**science**

Saturn rotation and revolution compared to earth

*November 1, 2015*

**math**

Jessica left the mall and drove toward the desert at an average speed of 40 mph. Shreya left one hour later and drove in the same direction but with an average speed of 60 mph. How long did

*November 1, 2015*

**chemistry**

Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O.

*October 27, 2015*

**math**

A car can travel 436 miles on 17 gallons of gas. How far can it go on 22 gallons of gas?

*October 12, 2015*

**Personal Finance**

Would you prefer a fully taxable investment earning 13.8 percent or a tax-exempt investment earning 10 percent? assume a marginal tax rate of 28 percent.

*October 7, 2015*

**Chemistry**

. Show a chemical reaction by which hardness is added to water that also explains the formation of caves in limestone formations?

*October 6, 2015*

**Poetry**

Never mind it was B :)

*September 24, 2015*

**Poetry**

What is rhyme scheme? (1 point_ The stressed and unstressed syllables within a poem a type of poetry that has no rhyme, but no rhythm (or patter of lines that rhyme within a poem) a poem that has a rhyming meter a poem consisting of ten syllables I think it's B but I'm...

*September 24, 2015*

**Social Studies Native Americans**

Thanks guys, I got a 100% and the answer was C :)

*September 9, 2015*

**Social Studies Native Americans**

I think it might be C or A

*September 9, 2015*

**Social Studies Native Americans**

How did the Native American groups of the northern west coast adapt to their environment? a: they built their homes out of a sun dried brick called Adobe b: they had a nomadic culture, moving there teepees from place to place c: they used tree bark to make canoes, and ate a ...

*September 9, 2015*

**Social Studies**

Where was the native American population density higher in 1500? A.Greenland 2. Caribbean islands 3.Present day Florida 4.Present day California CAN SOME HELP PLEASE :))

*September 9, 2015*

**Organic Chemistry**

Consider the crystallization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is dissolved in the minimum amount of 95% ethyl alcohol at 40°C rather than 78°C (the boiling point of ethyl alcohol), how would this affect the percent recovery of pure ...

*September 8, 2015*

**Math and exopents**

Given w = 10. w + w (12 - 2*2 * 3) * 7? Can some one help? the answers are: 73 12 6 3 but none of my calculations are 73, 12, 6 or 3 :(

*September 6, 2015*

**Math**

PLEASE HELP What is 6x3 / 9 - 1? I got 6 x 3 = 18 / 9 - 1 = 1 But for the answers it only 2 3 5 6 no 1 :((

*September 6, 2015*

**Spelling**

Does the word swimming have any silent letters? Is the second letter m silent?

*September 2, 2015*

**math**

In the figure below, angle y and angle x form vertical angles. Angle x forms a straight line with the 50° angle and the 40° angle. A straight line is shown and is marked with three angles. The first angle measures 50 degrees. The second angle measures 60 degrees. The ...

*July 11, 2015*

**Differential calculus**

The voltage across the plates of a capacitor at any time t seconds is given by V=Ve -t/CR, where V,C and r are constants. Given V = 300 Volts, C =0.12*10-6 F and R = 4*10 6 ohms Find the initial rate of change of voltage and the rate of change of voltage after 0.5 seconds

*June 30, 2015*

**physics**

apply E=kq/r^2 then you can directly find q

*May 26, 2015*

**math**

A rectangular dog pen that has the greatest possible area within a budget of 50$.A pen needs at least one gate for a dog. Fencing is $1.00 per foot, fence posts are $2.00 each and gates (3 feet wide) are $5.00 each. what is the area of a pen? pls help me !!!

*May 21, 2015*

**physics**

a softball is thrown at a speed of 40 miles per hour in a course that makes an angle of 60 degrees with the positive x axis. what is the initial speed in the horizontal direction?

*May 18, 2015*

**Language Arts**

1. A 2. C 4. B 5. D

*April 23, 2015*

**Maths- Please help**

Many thanks Reiny

*April 19, 2015*

**Maths- Please help**

How do i work out the mass of a flywheel. I am given the density as 7500kg/m3, a 500mm diameter and a 10cm thickness. Please help

*April 19, 2015*

**science**

A car,mass of 1500kg,accelerates at 2m/s from rest. Find 0-60mph time, use 1 mile=1613m

*April 19, 2015*

**chemistry**

What is the volume of dry O2 gas at STP, if it had a volume of 5.00 L at 103 kPa and 300 K?

*April 15, 2015*

**chemistry**

Consider the reaction 2 NO2 (g) ⇌ 2 NO (g) + O2 (g). If the initial partial pressure of NO2 (g) is 3.0 bar, and x is the equilibrium pressure of O2 (g), what is the correct equilibrium relation?

*March 22, 2015*

**chemistry**

Stoichiometry of a Precipitation Reaction – Lab Report Assistant Exercise 1: Stoichiometry and a Precipitation Reaction Data Table 1. Stoichiometry Values Initial: CaCl2•2H2O (g) Initial: CaCl2•2H2O (moles) Initial: CaCl2 (moles) Initial: Na2CO3 (moles) Initial...

*March 18, 2015*

**trapezoidal method**

dy dt = 1 + (t − y)^2, t ∈ [2, 3], y(2) = 1 use a step size of h = 1 and the Trapezoidal method to calculate by hand a numerical value for Y1 (≈ y(t = 3)).

*March 10, 2015*

**Geometry**

A red cross helicopter takes off and flies 75km at 20degree south of west. There it's drops off some relief supplies. It then flies 125 km at 10 degree west of north to pick up three medics. A. Make an accurate drawing of the two vectors decribed? B. draw the resultant it ...

*March 10, 2015*

**math**

18*5 1/16=

*March 4, 2015*

**math**

5*5 1/16=

*March 4, 2015*

**Chemistry**

calculate the density of 50.0 g of gold that occupies a volume of 2.59 mL.

*March 3, 2015*

**Simultaneous equations**

3x-14y=O and x-4y+1=0

*March 1, 2015*

**logic and design**

algorithm for waking in the morning, making and eating breakfast, I don't feel this is enough for my teacher can you help me. Idon't know if i have enough code start get up while not awake drink coffee endwhile if temperature < 65 then wear sweater else wear t-shirt...

*January 30, 2015*

**physics**

Its 900kg/m^3 for the density of liquid I think.

*January 19, 2015*

**Physics**

a rectangular box of negligible mass measures 5m long,1m wide and 0.5m high. How many kilograms of mass can be loaded into the box before it will sink in a freshwater lake?

*January 6, 2015*

**Math**

A carton contains 1 8/9 liters of apple juice. Rosalia drinks 1/6 liter of the juice every day. How much apple juice is left in the carton after a week?

*December 9, 2014*

**physics**

If an atom has an electron in the n = 5 state with ml = 3, what are the possible values of l?

*November 24, 2014*

**accounting**

which is an operating expense a salaries expense b payroll expense

*November 22, 2014*

**Chemistry**

Hello,Sorry, May I know what if the Ksp of both substances no different much??

*November 18, 2014*

**Chemistry**

The Ksp values of BaSO4 and SrSO4 are 1.1x10^-10 and 3.8x10^-7 respectively. Calculate the concentrations of Ba2+, Sr2+, and SO4 2- in a solution that is saturated with BaSO4 and SrSO4.

*November 18, 2014*

**statistics**

A researcher finds that two continuous, random variables of interest, X and Y, have a joint probability density function (pdf) given by: f(x,y)={cxy 0<=x<=1,0<=y<=1,x+y=>1, .........0 otherwise where c is a constant. (i) Find the value of c so that f(x,y) ...

*November 13, 2014*

**statistics**

You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins...

*November 13, 2014*

**statistics**

You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins...

*November 13, 2014*

**chin**

The following data shows the annual salaries of 12 randomly selected employees of a company (in £ 1000’s) on the X-axis and the average number of days they have taken days off work in the last 10 years on the Y-axis. Y X Y X 11.1 29.6 9.6 39.2 8.4 58.6 10.9 46.8 8.7...

*November 13, 2014*

**chin**

You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer draws, he/she wins...

*November 13, 2014*

**English**

Would down to earth be considered a character trait?

*November 12, 2014*

**Algebra**

"If possible, completely factor the expression. (If the expression is not factorable, enter NF.) x2 − 6x − 7"

*November 10, 2014*

**social studies**

why did a land bridge emerge between asia and north america

*October 28, 2014*