Friday

July 1, 2016
Total # Posts: 146

**Chemistry**

In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative Cu^+2 Cu(s) Zn(s) Zn^+2***
*May 25, 2016*

**Chemistry**

Of the following metals, which ions are most easily reduced? aluminum*** iron mercury potassium
*May 25, 2016*

**Math Help!**

whats the question. I can try to help
*May 25, 2016*

**Chemistry**

Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***
*May 25, 2016*

**maths**

In a right angled triangle where angle A is a right angle the Hypotenuse BC square equals AB square plus AC square 5 square plus 12 square equals 169 cm square square root 169 = 13 Therefore, BC= 13 To find the surface area of the prism you have to find the area of the equal ...
*May 15, 2016*

**Math Probability problem**

Can you please illustrate details? Thank you
*May 15, 2016*

**Math Probability problem**

yes
*May 15, 2016*

**Math Probability problem**

Tony has 3 jackets and 2 shirts and 2 pants. He wants to wear three items every day. How many outfits he can choose of the same clues and/or of different clues
*May 15, 2016*

**Math**

cancel a and b can you please tell me how many outfits can he make? Thank you
*May 15, 2016*

**Math**

Johnie has 3 Jackets (J1, J2 and J3) and 2 shirts (S1, S2) and 2 Trousers (T1, T2). He wants to wear 3 pieces of clothes daily. what should he choose if a) same clues or b) different clues
*May 15, 2016*

**Grammar**

was is a verb in the past tense. with is a conjunction
*May 15, 2016*

**Grammar**

sorry I meant the patient is oriented. the patient is being described (adjective) to be oriented. So it is not a verb
*May 15, 2016*

**Grammar**

the verbs are is has alert and oriented are adjectives which describe how the patient is. In other words they mean to say The patient is alert The patients is oriented So when using the word and which is a conjunction word this stops us from repeating the same sentence and ...
*May 15, 2016*

**Ms Sue English**

I agree with you that your grammar is excellent. when using series a Comma is used after each word regardless if it is a noun or adjective or a verb. Before the last word there should be the word "and". therefore, the sentence should be as follows Bright, friendly, ...
*May 2, 2016*

**Science**

a bullet with mass 0.281 kg is fired from a rifle. It stick into a block of wood with a mass of 17.8 that was at rest. The block/bullet combo moves at 3 m/s. What was the initial velocity of the bullet?
*March 20, 2016*

**Trig**

-2sqrt3/3?
*February 13, 2016*

**Trig**

And the exact value for csc4pi/3 is determined how?
*February 13, 2016*

**Trig**

Find the exact value of csc 4pi/3 What I have determined thus far: 4pi/3 = 60 degrees sin = square root of 3/2
*February 13, 2016*

**Trig**

Thank you to both of you, I am new to this site and it has been a blessing. Reiny your CAST rule which I was not taught, is very helpful. Your whole post will be useful come my exam. My book is not as straight forward..I fear for my GPA. :(
*February 13, 2016*

**Trig**

Find all values of theta where 0degrees<theta<360 degrees when csc theta = square root 2 Please detail how/why i can get to the solution. I need to understand the concept clearly...... It will probably relate to something taught down the line I'm sure.
*February 13, 2016*

**Trig**

Can you please detail why that is the answer?
*February 13, 2016*

**Trig**

I don't want just the answer but how to get to it. I need to fully understand how to arrive at the conclusion....And that is clearly where I am struggling.
*February 13, 2016*

**Trig**

Find all values of theta where 0degrees<theta<360 degrees when csc theta = square root 2
*February 13, 2016*

**Trig**

Find all values of theta where 0degrees<theta<360 degrees when csc theta = square root 2
*February 13, 2016*

**Trig**

If cot theta = -12/5 and the terminal side of theta lies in quadrant II find secant theta
*February 13, 2016*

**physics**

A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?
*February 3, 2016*

**Chemistry**

three liquids have densities of 1.15g/m, 0.79g/ml, and 0.95 g/ml. When the liquids, which do not mix, are poured into a graduated cylinder, the liquid at the top is the one with a density, in g/ml, of ?
*September 29, 2015*

**english**

C is wrong. senator is suppose to be capitalized. D is wrong. world war ii should be capitalized. A is wrong. President is not suppose to be capitalized unless it is preceded by a name. ex. President Obama B is correct. the North should be capitlize as it is referring to a ...
*September 24, 2015*

**Chemistry **

If there are 5,280 ft=1.00 mile ,how many miles are in 50,000 ft?
*August 5, 2015*

**English grammar**

That's exactly what I've been looking for! Thank you!!
*July 22, 2015*

**English grammar**

If it's describing someone then it's a participle. Your explanations always make sense. Thank you so much!
*July 22, 2015*

**English grammar**

Identify the verbal in this sentence as infinitive, gerund or participle. The old woman slept, not realizing she was no longer poor. I'm not sure if this is a gerund or a participle. "Not realizing" seems to be describing the old woman. I can't see how it ...
*July 22, 2015*

**English grammar**

Thank you very much!
*July 22, 2015*

**English grammar**

Identify the verbal in this sentence as infinitive, gerund or participle. They cried, but there was none to save them: even unto the LORD, but he answered them not. (Psalm 8:41) I chose infinitive because "to save them" looks like an infinitive that functions as an ...
*July 22, 2015*

**English grammar**

Thank you so much for your help!
*July 22, 2015*

**English grammar**

I think the second choice should be -The sentence contains a noun clause with a gerund inside it. Am I right?
*July 22, 2015*

**English grammar **

Select all the statements that apply to the sentence below. She did not believe that he actually knew the rules of bowling. -The sentence contains a gerund. <Yes, because of "bowling" -The sentence contains a present participle. -The sentence contains a past ...
*July 22, 2015*

**algebra**

A country's population in 1993 was 171 million estimate the population in 2012 using the exponential growth formula round your answer to the nearest million?
*April 16, 2015*

**physics**

If you do 500J of work to elevate a bucket of water, what is its gravitational potential energy relative to its starting position? 500*10=5,000 5,000/500=10
*March 13, 2015*

**Statistics**

Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the journal ...
*February 16, 2015*

**social studies 8th**

Salted Caramel is correct!
*January 24, 2015*

**p.e**

Gabby 100%, Ty Gabby!
*October 6, 2014*

**Fluid Mechanics**

A cylinder with internal diameter of 5cm and 15 cm high is filled up with an unknown substance. The mass of the cylinder is 4.6 kg which is 300% of the unknown substance mass. Determine the density and the specific gravity of the unknown substance.
*September 21, 2014*

**Fluid Mechanics**

A cone with base radius of 5 cm and height of 20 cm is filled with oil with specific gravity of 0.85. Determine the dimension of cubic steel which its weight is equivalent to the oil weight. Steel Specific Gravity is 7.1
*September 21, 2014*

**math(urgent)**

i also dont know what it means by unit of sale.so to solve this question no need calculate unit of sale right
*June 22, 2014*

**math(urgent)**

What is the value of the variable cost ? If the break even point is $ 130, the fixed cost is $ 330, selling price per unit is $ 25,and unit of sell is $50. (3 marks)
*June 22, 2014*

**MATHS**

walking at 3/4 of his usual speed, a man is late by 2.5 hrs. What is he usual time?
*March 20, 2014*

**maths**

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second.
*February 3, 2014*

**MATHS**

Two different schools (A and B) have the same number of pupils. The ratio of the boys in school A and the boys in school B is 2:1 and the ratio of the girls in school A and the girls in school B is 4:5. Find the ratio of the boys in school A to the girls in school A.
*February 2, 2014*

**MATHS**

Thanks Ms. Sue The answer given is 1/6???
*January 26, 2014*

**MATHS**

4 girls shared a pizza equally for lunch. If one of them gave away 1/3 of her share, what fraction of the pizza had she left? 1. 1/12 2. 1/6 3. 1/4 4. 2/3
*January 26, 2014*

**Grade 5 Maths**

A coin box contained some twenty-cent and fifty-cent coins in the ratio 4:3. After 20 twenty-cent coins were taken out to exchange for fifty-cents coins of the same value and put back in the box, the ratio of the number of twenty-cent coins to the number of fifty-cents coins ...
*January 19, 2014*

**Maths- yr 5**

Tom spent 1/5 of his money and 1/4 of the remainder on a magazine. He had $25.80 left. How much was the magazine? A $5.10 B $6.45 C $8.60 D $7.80
*January 16, 2014*

**MATHS**

Ken and Sam shared some marbles. The ratio of the number of marbles Ken has to the number of marbles Sam has is 5:3. If Ken's marbles increases by 15%, what percentage of Sam's marbles must be decreased so that the total number of marbles they have remained unchanged?
*January 1, 2014*

**MATHS**

Mrs Koh bought some pens, files and erasers. The ratio of the number of pens to the number of files to the number of erasers she bought was 1 : 2 : 3. The cost of each pen and eraser is $2.50 and $0.50 respectively. If she spent $60 on the pens and the erasers, how many files ...
*December 30, 2013*

**MATHS**

The ratio of the number of males to the females at a performance is 5 : 7. 1/4 of the males and 3/4 of the females are children. What is the ratio of the number of adults to children? Express your answer in simplest form.
*December 30, 2013*

**MATHS**

Donna wants to cut out circular discs of radius 7cm from a cardboard measuring 50cm by 70cm. What is the maximum number of circular discs that can be cut out from the cardboard?
*December 29, 2013*

**MATHS**

Stacey spent 1/ 6 of her money on a purse and 7/12 more money on a bag than on the purse. What fraction of her money did she spend?
*December 19, 2013*

**MATHS**

Carrie and Luke drank 4/5 of a bottle of juice. Carrie drank half as much as Luke. What fraction of the juice did Carrie drink? Answer given is 4/15
*December 3, 2013*

**MATHS**

Mr Wood makes tables with 4 legs, and stools with 3 legs. Nine customers ordered 8 items each. Each order was different. How many legs are needed altogether?
*December 1, 2013*

**MATHS**

This bank machine has four rows of buttons 1 2 3 4 5 6 7 8 9 0 Sam has a 4-digit bank number that uses one button from each row. For example his bank number could be 0571. How many different possibilities for Sam's bank number are there? The answer should be 648
*December 1, 2013*

**MATHS**

The storekeeper found that if he removed the apples from his box either 2,3,4,5 or 6 at a time there was always one left over. However, if he removed the apples 7 at a time there was no apples left. If the box holds 500 apples, how many apples does the storekeeper have?
*November 27, 2013*

**MATHS**

The sum of three numbers is 1313. The sum of two of the numbers is 450. What is the third number?
*November 20, 2013*

**MATHS**

24 1c coins are set out in a row on a table Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced by a 50c coin and every 7th coin is ...
*November 19, 2013*

**MATHS**

A pie is cut into two equal parts. The first part of the pie is shared between Abdul and Kate. Kate has 3 times as much as Abdul. The second part of the pie is shared between Sarah and Ron. Ron has 3/5 as much as Sarah. The mass of Sarah's share of the pie is 200 grams. ...
*November 7, 2013*

**maths**

Alan is using matchsticks to make isosceles triangles. Isosceles triangles have at least two sides the same length.How many different single isosceles triangles can he make with 45 matchsticks, using all the matchsticks each time? The answer is 11, but I can only work out 7, ...
*November 6, 2013*

**MATHS**

lf you added a fifth of one and a quarter to one and a quarter, what would the answer be ? ..... The answers is 1 1/2 have tries 0.2 + 0.25 + 0.75 = 1.20 or 1 1/5 ???? 0.2 + 0.75 + 1 + 0.25 = 2.20 ??? Please help!
*November 1, 2013*

**Business Math**

1. Lee Holmes deposited $16,700 in a new savings account at 6% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,700 at 6% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? 2.Bill Moore...
*October 29, 2013*

**MATHS**

This question has mentioned 'pattern of numbers', does that means not just do simple calculation from left to right OR there is a fast way to solve this question, please help. Look at this pattern of numbers. 7x 11 x 13 x 1 = 1001 7x 11 x 13 x 2 = 2002 7x 11 x 13 x 3...
*October 21, 2013*

**physics**

A constant force of 58.3 N, directed at 31.7 degrees form horizontal, pulls a mass of 11.9 kg horizontally a distance of 2.77 m. Calculate the work done by the force.
*October 20, 2013*

**statistics**

It is 40% the correct answer
*May 6, 2013*

**BIO**

If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified? I am pretty sure I cannot use 2^n (n equals the number of amplification cycles)because I don't have a single molecule of starting DNA template. How do I do this?
*April 2, 2013*

**physics**

A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 50.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the dispersion of the...
*April 1, 2013*

**Chemistry**

The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.25 pounds of butane (fuel value is 10.85 kcal/g) is used to heat 120.0 kg of water at an initial temperature of 21.2 °C...
*March 22, 2013*

**math**

6/8
*March 18, 2013*

**phisics**

You probably have to times it by how high your lifting it off the ground and then divide by 100.
*March 14, 2013*

**math**

divide 1.702 by .06 gave answer correct to two decimal places.
*February 9, 2013*

**Ph CHEM**

I did it and got 10 and it is saying that its incorrect
*November 27, 2012*

**Ph CHEM**

A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution. I did this problem and got 4 but it is not going in as correct. -log(1*10^-4)=4
*November 27, 2012*

**yetf8edfueidcyt87e**

a farmer wishes to fence off a rectangular field with 1,000 feet of fencing.if the long side of the field is along a stream, express the area of the field as a function of its width
*October 13, 2012*

**college geometry**

if triangle mnp approximate triangle srt with proportionality factor k, show that if ma and sb are altitudes of the given triangles, then ma = ksb in
*October 11, 2012*

**Chem- Percent Yield**

When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?
*October 11, 2012*

**chemistry**

Determine the concentration of a solution of Mg(NO3)2 given the precipitate formed is 2.97 g and there are 50mL of Mg(NO3)2 and 50 mL of NaOH. Please show all work for each step clearly
*September 18, 2012*

**Art**

I think japan is more nature-like.
*May 14, 2012*

**math**

do you mean 3,500? If its that its 1.75. If its 35,000 its 17.5......
*May 13, 2012*

**chem**

im confused on how to balance
*April 11, 2012*

**chem **

The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the end point. Unbalance ...
*April 11, 2012*

**chem**

how do you convert mmols to mols?
*April 11, 2012*

**chem**

0.1802 g sample of a chlorocarbon compound was analyzed by burning in oxygen and collecting the evolved gases in a solution of sodium hydroxide. After neutralizing, the sample was treated with 39.50 mL of a 0.025 M AgNO3. This precipitated the Cl- as AgCl and left an excess of...
*April 11, 2012*

**chem**

is mass sample 0.1805?
*April 11, 2012*

**chem**

An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2 decimal places]
*April 11, 2012*

**chemistry**

A basic buffer is prepared by adding 0.3310g of NH4Cl to 1.00L of 0.2088 M NH3. Kb (NH3) = 1.8x10-5.
*March 21, 2012*

**PHYSÝCS**

please any one help me for this questionnnnnnnn ý need urgently At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at ...
*February 27, 2012*

**PHYSÝCS **

please any on help me for this question ý need urgently. The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the ...
*February 27, 2012*

**PHYSÝCS**

please any one help me for this question The figure shows the paths of a golf ball your friend drops from the window of her apartment and of the rock you throw from the ground at the same instant. The rock and the ball collide at x = 34.14 m, y = 17.75 m, and t = 2.71 s. If ...
*February 27, 2012*

**chemistry**

Which compound is more polar: water or dicloromethane? I know that water is a polar molecule but I dont know the polarity of dicloromethane or how to figure out which one is more polar than the other?
*February 20, 2012*

**chemistry**

what does it mean to draw the chemical structure of dichloromethane? does this just mean the 2d structure?
*February 20, 2012*

**math**

Express 15 as a percentage of 60 what is the answer
*February 4, 2012*