# Posts by LEE

Total # Posts: 905

**social studies**

There was a crossword puzzle in issue 24 of the N.C weekly reader...8 across and neither my child nor myself could find the answer, she answered all of the rest of the puzzle words, but this one stumped her and it did me as well, the question was, "N.C to industry," ...

**Physics HELP! **

A locomotive of mass 2.1 x 104 kg travelling at 2.0 m/s runs into an identical stationary locomotive. a) If the collision is perfectly inelastic, what is the speed of the two trains after the collision? b) If the collision is perfectly inelastic, what fraction of the energy is...

**Physics**

A 5.0 kg penguin sits on top of a 12 kg sled, as in the figure. A horizontal force of 45 N is applied to the sled, but the penguin keeps himself stationary by holding onto a string attached to the wall. The coefficient of kinetic friction between the penguin and the sled is 0....

**Physics**

On takeoff, the combined action of the engines and the wings of an airplane exert a force of 8.00 x 103 N on the plane upward at an angle of 65.0? above the horizontal. The plane rises with constant velocity in the vertical direction while continuing to accelerate in the ...

**Physics **

An 1800 kg helicopter rises with an upward acceleration of 2.0 m/s2. What lifting force is supplied by its rotating blades?

**Chemistry **

Which of the changes are chemical changes? a) Sugar crystals are ground to a fine powder. b) A candle is burned c) Two clear colorless salt solutions are mixed and a bright orange precipitate forms. d) Candle wax is melted e) A silver teapot turns black

**Geography**

just looking for some key points on the issue.

**Geography **

Why might a Confucian praise or criticize China’s current political system and its approach to economic and political change?

**Chemsity**

will calcium metal be oxidized by sr2+?

**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 ...

**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

**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.

**maths**

Good eggs 150-30=120 ratio 120÷30

**Math**

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

**Social Studies**

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

**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

**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

**Measures of Central Tendency**

I did and the anwer was wrong?

**6th grade math**

I'm confused?

**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?

**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 ...

**Math**

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

**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 ...

**Adding intergers and their application**

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

**SS**

Answer Choice

**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?

**Math**

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

**Math**

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

**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...

**history**

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

**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?

**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 ...

**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'...

**Math**

Thank you

**Math**

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

**Math**

I just need the equation

**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 ...

**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

**MATH**

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

**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 ...

**math**

Thank You so much!

**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

**math**

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

**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

**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

**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...

**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?

**english composition ll**

Which of the following best illustrates a positive feedback loop?

**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

**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.

**Language arts**

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

**English**

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

**Language arts**

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

**College algebra**

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

**Math**

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

**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?

**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.

**Math**

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

**science**

Saturn rotation and revolution compared to earth

**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

**chemistry**

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

**math**

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

**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.

**Chemistry**

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

**Poetry**

Never mind it was B :)

**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...

**Social Studies Native Americans**

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

**Social Studies Native Americans**

I think it might be C or A

**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 ...

**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 :))

**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 ...

**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 :(

**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 :((

**Spelling**

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

**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 ...

**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

**physics**

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

**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 !!!

**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?

**Language Arts**

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

**Maths- Please help**

Many thanks Reiny

**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

**science**

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

**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?

**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?

**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...

**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)).

**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 ...

**math**

18*5 1/16=

**math**

5*5 1/16=

**Chemistry**

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

**Simultaneous equations**

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

**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...

**physics**

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

**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?

**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?

**physics**

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

**accounting**

which is an operating expense a salaries expense b payroll expense

**Chemistry**

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

**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.