# Posts by Lydia

Total # Posts: 220

**chemistry**

so its only that one?

**chemistry**

molecules?

**chemistry**

Examine the analogy and how it compares a part to a whole. link : chain :: atom : _____ Choose the answers that best complete this analogy. (select all that apply) molecule matter compound proton please help

**chemistry**

How can the concept Independent Variable v Dependent Variable apply in your life? please help

**science**

What physical property is changed when a waitress pours coffee from a pot into four mugs? density color volume temperature

**science**

thank you (:

**science**

Baking soda is mixed with water, and no bubbles are produced. When baking soda is mixed with vinegar, it bubbles and foams rapidly. What chemical property of baking soda is shown in the scenario? 1)reactivity 2)boiling point 3)flamibility 4)color change (select all that apply)

**science**

thank you

**science**

Which process is an example of a chemical change? A metal railing rusting in damp weather alcohol evaporating from a cotton swab steam rising from a boiling pot of soup a piece of wood shrinking as it dries out

**science**

thank you

**science**

Which process is an example of a chemical change? drying clothes in the dryer chopping a tree activating a glow stick heating a cup of tea

**science**

Imagine yourself making a nice cup of tea on a cold winter day. You begin by boiling some water in a kettle. Next, you add the steaming liquid to your cup. Then, you open a tea bag and repeatedly dunk it into the water. You pour a dash of milk and drop a few sugar cubes into ...

**science**

thank you

**science**

which items would still be classified in the same way? Which items would be classified differently? • atoms • elements • compounds • molecules • matter please help

**math **

Can you please help me simplify this into one fraction? 3/(x-3) - 5/(x/2) Here are the options: A) -2x+9/(x-3)(x-2) B) -2x/(x-3)(x-2) C) -2x-9/(x-3)(x-2) D) 2x+9/(x-3)(x-2) I think it's option D but I'm not so sure :(

**Chemistry**

Please help me these are the only two I have left. 17. If the solubility of a gas is 5.6 g/L at 505 kPa pressure, what is the solubility of the gas when the pressure is 1010kPa? * 19. Calculate the [H?] for the aqueous solution in which [OH?] is 1 x10??. Is this solution ...

**Chemistry**

Can someone check my answer and let me know me if the are right or wrong. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H?O at 20°C.) * 34 g 204 g ***** 2040 g 3. (1 point) If the solubility of a gas in water...

**Chemistry**

Can someone check my answer and let me know me if the are right or wrong. If I wrong can you give me the right answer plz. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H?O at 20°C.) * 34 g 204 g 56 g******* ...

**Algebra**

Determine the discriminant for the quadratic equation -3 = x^2 + 4x + 1. Based on the discriminant value, how many real number solution does the equation have? Discriminant =b^2 - 4ac

**Science**

When calculating delta Tsample,why is th initial temperature taken to be 100 degrees Celsius

**Math**

The temperature at 6:00 pm was 33°f.over the course of the day, the temperature decreased 5.5°F per hour. What was the temperature at midnight?

**english**

Nwoye and Ikemefuna as a representation of the rise of new cultural formation among the igbo society in Achebe's Things Fall Apart

**english**

Chinua Achebe's Things Fall Apart as a Postcolonial novel

**english**

Chinua Achebe's Things Fall Apart as a defiance of eurocentric sociological and anthropological narration of South Africa

**math**

Earned five dollar earned $5.50 per hour as an assistant in an auto repair shop how much will Taylor on if she works for and a half hours on Friary's

**Math**

if 6 workers complete a 1 km of roadway in 4 days. how long would it take for 4 workers to complete 3 km of roadway

**Trigonometry**

Suppose *u* is a quadrant IV angle with cos(u) = 3/5. Suppose *v* is a quadrant IV angle with cos(v) = 12/13. Find the exact value of sin(u-v) I have gotten to sin120cos150 - sin150cos120 but I am not sure I am correct up to that point and I don't know where to go from there.

**Math**

A tennis racket is offered at 25% off. Including 7% sales tax, the final price is $67.41. What is the original price, without tax or discount?

**Science (Physics)**

Air becomes a conductor when the electric field strength exceeds 3.00 × 106 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 8.5 m in radius. The value of the Coulomb constant is8.99×109 N·m2/C2. Answer in units of C. I have ...

**physics**

Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...

**physics**

Can anyone help just can figure it out. Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) ...

**physics**

Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...

**physics**

a mass if 10kg move with a velocity of 4ms-1find it kinetic energy.

**geometrie**

(4, 5)'(9, 5) and (5,1) are three of a quadrilateral whose opposite sides are equal and parallel.there are three possibilities for the co-ordinates of the missing vertex.Find all three,and draw the three quadrilateral on a grid

**Math**

IN A CLASS OF 55 STUDENTS, 35 TAKE ENGLISH,40 TAKE FRENCH AND 5 TAKE OTHER LANGUAGES. DETERMINE HOW MANY STUDENTS TAKE BOTH LANGUAGES

**Urgent math**

please help The fox population in a certain region has a relative growth rate of 7% per year. It is estimated that the population in 2005 was 19,000. (a) Find a function n(t) = n0ert that models the population t years after 2005. n(t) = (b) Use the function from part (a) to ...

**Urgent math**

population growth model. Can anybody please help me out in trying to solve this problem? It's my homework and I don't seem to understand what I am getting. The count in a culture of bacteria was 400 after 2 hours and 25,600 after 6 hours. (a) What is the relative rate...

**College Algebra**

f(x) = x2 + 11x, x ≥ − 11/2 find the inverse

**College Algebra**

A function f has the following verbal description: "Multiply by 5, add 9, and then take the fifth power of the result." and find the inverse?

**Algebra**

Find the net change in the value of the function between the given inputs. g(t) = 8 − t2; from −6 to 9

**Algebra**

If g(x) = x2 + 8x with x ≥ −4, find g−1(20)

**College Alg**

Find the inverse function of f. f(x) = 36 − x2 , 0 ≤ x ≤ 6 I can't seem to find this inverse, someone help please?

**College Algebra**

If g(x) = x2 + 6x with x ≥ −3, find g−1(55) I need help solving this problem this is an example but it does not thoroughly is explained. :/

**College Algebra**

nevermind I got it

**College Algebra**

A rectangular parcel of land is 20 ft longer than it is wide. Each diagonal between opposite corners is 100 ft. What are the dimensions of the parcel? This is an Example in the book but it does not clarify in the text book, Can anybody please show me how to do this?

**L.A the book**

C and A... just took the test

**educational technology**

3. adding transitions to slides in a presentation A. offers effects when moving from one slide to the next.***** B. adds animation to selected text and images. C. adds a new slide to a presentation in microsoft powerpoint. D. creates sound effects connected to an image. 4. ...

**HISTORY**

Choose two famous Americans who lived during the period 1820–1860. • Research the two people you chose. • Analyze your research. • Write a dialogue between the two famous Americans Can somebody help me with this? * Give me ideas for people * Research on the...

**acounting**

A company purchased and installed a machine on January 1 at a total cost of $72,000. Straight-line depreciation was calculated based on the assumption of a five-year life and no salvage value. The machine was disposed of on July 1 of the fourth year. The company uses the ...

**Setswana**

O tshwanetse go tlhompha setso sa gago

**science**

An experienced mountaineer decided to climb mount everest using the same route in the same season and with similar materials and equipment used by a fatal 1924 expedition . The scientific purpose of such a climb would be to

**science**

Pepsin,which speeds up the breakdown of protein,is classified as

**L.A.**

just thought I'd let you know 3 is wrong the correct answer I 1 because I just took the quiz and got that one wrong

**accounting**

im stuck too

**calc / physics**

Suppose that a 5-foot-long chandelier falls from a 35-foot ceiling and that you are 6 feet tall and standing directly under the chandelier (a) How long do you have to get out of the way when it drops? =-16(t^2)+Vt+h =-16(t^2)+0+(35-5-6) (for the bottom of the chandelier and ...

**Algebra**

Oh thank that did help :D

**Algebra**

If twice the opposite of a number increased by five, then the result is the opposite of a number. What is the number? What is this even asking off me?

**math equation**

Please help me to work this out using the inversion method (I'd appreciate if you could provide a step by step breakdown (I don't understand how to do it and my math really sucks!!): Jim spent 1/3 of his salary on food. He spent 1/4 of it on shoes. He has $400 ...

**Math Help? Check my answers.**

Sorry! How about now? 2. B 3. A 4. D

**Math Help? Check my answers.**

1. Name the coefficients in the polynomial. 4x^2 + 3x - 3 4, -3, -3 4, 3, 4, 3, 3, -4, -3, 2. How many terms are in the following polynomial? 6x^4 + 3x^3 - 2x^2 + 15x - 14 5 4 3 2 3. In the expression -7x - 5x^2 + 5, what is the coefficient of x? 7 5 -5 -7 4. Write the ...

**science**

i think its b

**Math Help? Check my answers.**

1. Find the next three terms in the sequence. 30, 22, 14, 6, ... -3, -12, -21 -1, -8, -15** -1, -2, 3, -2, -10, -18 2. Find the next three terms in the sequence. 3, 6, 9, 12, ... 15, 18, 20 15, 19, 20 15, 18, 21 14, 18, 21** 3. Find the next three terms in the sequence. -1, 9...

**english**

In letter A. into is italicized In letter B. ill is italicized In letter C. at is italicized In letter D. disdainfully is italicized.

**english**

Which of the following sentences contains an italicized word that's used as a predicate adjective? A. Jerry looks into the microscope. B. Jerry looks ill today. C. Jerry looks at the map. D. Jerry looks disdainfully at the pile of laundry. I think it's B.

**history,geograph,life science,life orentation,mathematical literacy,english**

Maths lit geography agricultural science life orientation

**college physics**

(a) use d=vi*t+0.5*a*t^2 manipulate the equation to solve for t 210 m = (23 m/s)t+0.5(0.150 m/s^2)*t^2 t = 9.41 s (b) v = d/t = 210 m/ 9.41 s = 22.3 m/s I'm still trying to figure out the rest...

**math**

-2(-3x+ 4) >greater or equal to 3(5-2x)

**math**

how do you do this problem of inequality -2(-3x4 > 3(5-2x)

**Math**

How can you write a unit rate if at least one term is a fraction? How is this different from writing a unit rate where both terms are whole numbers?

**Mahlangu**

Identify one environmental or human factor that causes ill health,accidents,crises and disasters within your community or any other community within South Africa.

**thermodynamics**

a carnot machine operates between a hot reservoir at 200 grade C and a cold reservoir at 20 grade C. When operated as an engine it receives 1000 KJ/kg; find the work output. Find the COP when operates as a refrigerator and a heat pump.

**Chemistry**

Explain how water of hydration is related to measurement. Then explain how it is related to the law of definite composition

**Geometry: Student Correction (Stuck)**

BD = 4 DA = 5 DE = 6 Solving for x 1. Joelle’s proportion is correct. 2. Joelle’s proportion is not correct because BD, which is 4, corresponds proportionally to BA, which is 9, not 5. 3. Joelle’s proportion is not correct because DE, which is 6, does not ...

**Geometry: Student Correction (Stuck)**

Joelle set up the following proportion: 4/6 = 5/x. Solve for x. Determine if proportion is correct. If not, explain what is wrong with it.

**Geometry**

Triangle ABC has vertices of A(0,0), B(–4,0)and C(–2,4). The coordinates of each vertex in triangle AEF are multiplied by 3 Is triangle ABC~AEF? Explain.

**Pre-Algebra**

I had this test these answers are correct you'll get 100% hope it helps 1).1,256ft2 2).4,187ft3 3).615cm2 4).1,436cm2 5).8

**Chemistry**

What is the percent by mass of glucose in a solution containing .15 mol of glucose dissolved in 410 g acetic acid? The molar mass of glucose is 180g/mol.

**World Geography**

1.a 2.

**Math (9th grade)**

Write an equation in point slope form of a line parallel to 12x-2y=6 and passes through the point (-4,-3)

**Chemistry**

A reaction is peformed in which 50 ml of .400M silver nitrate and 75 ml of .100M hydrochloric acid are mixed together. The initial temperature of the solutionn was 25 C and the final temperature was 27.2 C. What is the enthalpy, in kj/mol, for the formation of the precipitate...

**chemistry**

what is the sum coefficient and balanced equation of : Co(OH)3+Na2CO3 my answer is 3Co(OH)3+ 3Na2CO3---> 3CoCO3+ 3Na2OH

**chemistry**

How could you use a precipitation reaction to separate the following pair of cations: K^+ and Hg2 ^2+? (write the formula and net formula for each reactant)? The answer is Hg2 ^2+ (aq) + 2Cl- (aq) = HgCl2(s) but how do I work it out?

**chemistry**

How do I balance the following equation by the half-reaction method (it takes place in basic solution)? Fe(OH)2(s) + O2(g) = Fe(OH)3(s) the answer is 4Fe(OH)2(s) + 2H20(l) + O2(g) = 4Fe(OH)3(s) but how do I work it out?

**Math (12th)**

Thank you. I tried that and got 3 :)

**Math (12th)**

What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...

**literature**

Is Pride and Prejudice identified more with Romanticism or Realism? Even though it was written during the Romantic period, it seems more like Realism to me. Is this correct? Thanks!

**Math please help urgent !**

slope**

**Math please help urgent !**

Find the slop of the tangent to the curve y=(10-sqrt x)(5+sqrt x) at x=25

**Cross country running**

how do you keep motivated to keep going even though your body wants to quit?

**Cross country running**

Thankyou very much!

**Cross country running**

Can I do anything for side cramps during a race?

**Cross country running**

How does one deal with another runners joy after getting sufficiently skunked? In other words, Can I get some tips on how to be a good sport when I get creamed during a race?

**science**

what is the geometry around each carbon in ethanoic acid

**math**

if youre looking for x its 6

**history**

The Philippine-American war was A) a minor event for americans B) more costly than the spanish american war C) fought in a traditional manner D) never completely resolved E) over even before the spanish american war

**English**

What is an example in "Antony and Cleopatra" of Casear displaying a disposition to not want to go to war? Thank you!

**physics**

so i found a formula: m1v1ix +m2v2ix = m1v1fx + m2v2fx which i rearranged to find v1fx and eliminated m2v2ix because m2v2ix = 0 so the eqn looked like: v1fx = (m1v1ix - m2v2fx)/m1 subbing in i got: [(0.029)(200) - (1.1)(6.25)]/(0.029) which gave the answer -59.8276. is this ...

**physics**

i'm just unsure of what formula i should apply!

**physics**

A 29 g rubber bullet is travelling to the right at 200 m/s, when it hits a 1.1 kg block of wood sitting on a horizontal frictionless surface. If this collision is inelastic (though not perfectly inelastic), and the velocity of the block of wood after the collision is 6.85 m/s ...

**physics**

Assume you are given two objects whose centre of mass is located exactly at the origin. The first object has a mass of 33 kg and is located at position +30 m with respect to the origin. If the mass of the second object is 7.0 kg, what is its position (in m) with respect to the...