Thursday

July 31, 2014

July 31, 2014

Total # Posts: 115

**Math**

Bob spends 3/8 of his pocket money on food and 1/3 of it on a present for his sister. What is the fraction of his pocket money remains? I need some help on this!

**Writing (Writeacher and Ms. Sue)**

Do you think I have written as though it is from a bird's perspective?

**Writing (Writeacher and Ms. Sue)**

Correction: "The bright flames rose from the chimney like a candle, drawing many birds to the house, knowing their next meal had ignited it. However, the great deal of gray smoke and the stench of singed feathers rose even quicker, signaling the others to flee."

**Writing (Writeacher and Ms. Sue)**

Yes, but the main character throws a canister of paraffin in the fire, which then causes the flames to rise up from the chimney. Correction: "The bright flames rose from the chimney like a candle, drawing many birds, knowing their next meal had ignited it. However, the gr...

**Writing (Writeacher and Ms. Sue)**

Please help me!

**physics**

What net torque is required to give a uniform 12-kg solid ball with a radius of 0.22m an angular acceleration of 12rad/s2 ?

**Physics **

A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21-T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil?

**physics**

An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration a>0 for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows down with an acceleration of the same magnitude (but opposite direction) −a , until it com...

**Math URGENT!!!**

-32=8/7(3w - 1) Find w.

**Physics**

Two spherical shells have a common center. A -3.00 × 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 × 10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitude and direct...

**Physics**

Two spherical shells have a common center. A -3.00 × 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 × 10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitude and direct...

**Physics**

Two spherical shells have a common center. A -3.00 × 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +4.00 × 10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitude and direct...

**Physics**

*update i found the speed. it was 23.5 m/s so with this i could find #1,2 and 3. But I still need help with #4 and 5!

**Physics**

You are at the park. You are going to analyze a roller coaster. You ask the attendant for the height of the first hill and find out that it is 106.1 feet tall. Along with your group members, you pace off a train waiting to be loaded. The train is 10.5 paces long. Your group th...

**Physics**

Thank you!

**Physics**

a 32 kg child stands at the edge of a circular platform that rotates at w=2rad/s about its center. Mass of platform=60kg, radius=2m. The child walks from the rim towards the center. Find the Angular speed when the child reaches a point 0.500 m from the center.

**physics**

Sorry, still confused. I get that the density for mercury is 13.6x10^3 kg/m^3. All I know is that the answer is 4.08m, I just don't know how to get there. Do I use P=density*gravity*height h=pressure/density*9.8 but my answer didn't even come close to 4m

**physics**

how tall must a water filled manometer be to measure blood pressure as high as 300 mm Hg? what do i use for pressure, density and height?

**Physics**

Oops! I forgot that it was a 2 part question. Part 1: Calculate the bouyant force on a 2.00 L helium balloon. Volume:2.00 L Helium's density: 0.18x10^-3 FB=density*gravity*volume=> 3.53x10-3 N other then these numbers nothing else was given for part 2(the part i need he...

**Physics**

Thats what I was thinking, let me see if i missed something

**Math**

There are 40 students in a class. There are 4 more boys than girls. How many girls are in the class?

**Chemistry**

1. gas to liquid 2. liquid to gas 3. solid to gas 4. solid to liquid 5. gas to solid 6. liquid to solid Please label the reactions above into the groups: ΔH=+, ΔS=+ ΔH=+, ΔS=- ΔH=-, ΔS=+ ΔH=-, Δs=-

**Chemistry**

What is the net chemical equation of: Reaction 1: 3.3 kcal/mol+glucose+Pi --> glucose-6-phosphate+H2O Reaction 2: ATP+H2O --> ADP+Pi+7.3 kcal/mol AND Calculate the amount of energy released in the coupled reaction. energy released: ____kcal/mol

**calculus**

that is how it is set and written

**calculus**

Which is the sixth term in the expanded form of this binomial? 14(x)^3 280(x)^2 280(x)^3/2 672x 448x

**PHYSICS**

1.) A bird can fly 20 km/h. How long does it take to fly 12 km? 2.) If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?

**math**

change the exponential expression to an equivalent expression involving a logarithm. 8.8=7^x please show work

**Math**

I'm suppose to 'determine whether the equation is an identity or a conditional equation. A) -6(x-3)+5 = -2x+10 I solved this and got x = 13/4. How am I suppose to figure out whether its identity or conditional equation? Same goes with this problem B) -7(x-3)+4x = 3(7-x...

**Physics**

A 70 g ball moves 45m/s. If its speed is measured to an accuracy of 0.10% what is the minimum uncertainty in its position?

**psychology**

is it true that people who suffer from anterograde amnesia will recall past memories but not be able to make new ones?? or they lost the past and unable to make new memories??

**math**

simplify. 1) 9 - 3 - 4 2) 9 + 1 +3 3) 6 + 1 + 3 4) 5 + 4 - 2 5) 6 - 5 + 2 6) 9 - 2 + 5 Help D:

**Chemistry**

I need help with Stoichiometry Mapping and solving using the "line bar" method Cl2P4(s)+6Cl2(g) --> 4PCl3(g) How many mL of PCl3 can be produced by the reaction of so g of Cl2(g)

**Physics**

What are the strength and direction of the electric field at the position indicated by the dot in the diagram below, in which d = 4.9 cm, q = 11 nC, the positive x-axis points to the right, and the positive y-axis points up? Give your answer in each of the following forms. The...

**Physics**

Two 8 cm long thin glass rods uniformly charged to +10 nC are placed side by side, 4.0 cm apart. What are the electric field strengths E1 to E3 at distances 1.0 cm, 2.0 cm, and 3.0 cm to the right of the rod on the left along the line connecting the midpoints of the two rods?

**math variation ques**

The price, $C, of printing n copies of a book is partly constant and varies partly as n. The selling price of each copy of the book is fixed as $b. If 630 copies were printed and sold, there would be a loss of 10%. If 980 copies were printed and sold, there would be a profit o...

**physics**

A 2.8 kg gold bar at 99 degrees celcius is dropped into 0.21 kg of water at 23 degrees celcius What is the ﬁnal temperature? Assume the speciﬁc heat of gold is 129 J/kg times degrees celcius. Answer in units of degrees celcius

**Chemistry**

Solid sodium reacts violently with water, producing Heath hydrogen gas, and sodium hydroxide ( 2Na + 2H2O --> 2NaOH + 2H2 ). How many molecules of hydrogen gas are formed when 67.2 g of sodium are added to water?

**english**

need help with my Juggling topic.I got 6/20 and I want to get the full 20 points! Thanks!Such as thesis, Introduction. Thesis: The purpose of my speech is to inform my audience about my experience with juggling; more specifically how I became involved with juggling. I have to ...

**English**

need help with my Juggling topic.I got 6/20 and I want to get the full 20 points! Thanks!Such as thesis, Introduction. Thesis: The purpose of my speech is to inform my audience about my experience with juggling; more specifically how I became involved with juggling. I have to ...

**calculus**

A small dog shelter in the shape of a rectangular solid is to have a square base and an open front. If the volume is to be 36ft^3, find the dimensions for which the amount of material needed is a minimum. V=2x*y

**psychology**

describe cognitive neuroscience using an example.

**Accounting**

According to the Sarbanes-Oxley Act, the responsibility for issuing a report on a company's internal controls over financial reporting rests with: A.) both the company and its independent auditor. B.) the company. C.) the independent auditor. D.) neither the company nor it...

**chemestry**

a watch glass and filter paper weighing 41.060g was used to collect the CuSCN precipitate in this experiment. After drying, the precipitate, watch glass and filter paper weighed 42.525g. If the sample of alloy used for the analysis weighed 1.380g, what was the percent copper i...

**chemestry**

calculate the moles of compound in .540g of ammonium bromide

**chemestry**

What is the molecular formula of the following compound? Empirical formula C3H6O2 (M=74.08 g/mol)

**chemestry**

calculate the moles of compound in 0.540 grams of ammonium Bromide

**chemestry**

What is the molecular formula for the folowwing compound? Empirical Formula: C3H6O2 (M=74.08 g/mol)

**Chemistry**

1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess HCL spattered out o...

**Physics (please help!!!!)**

The mass m = 14 kg shown in the figure is displaced a distance x to the right from its equilibrium position. (Take k1 = 113 N/m and k2 = 198 N/m.) (a) What is the net force acting on the mass? (Use any variable or symbol stated above along with the following as necessary: k_ef...

**Physics**

Two identical pucks are on an air table. Puck A has an initial velocity of 2.0m/s in the +x-direction. Puck B is at rest. Puck A collides elastically with Puck B and A moves off at 1.0m/s at an angle of 60 degrees above the x-axis. What is the speed and direction of puck B aft...

**physics**

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...

**physics**

Suppose the vertical loop has a radius of 8.92 m. What is the apparent weight (Wap) of a rider on the roller coaster at the bottom of the loop? (Assume that friction between roller coaster and rails can be neglected. Give your answer in terms of m and g.)

**Chemistry**

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

**2 balloons and a doubled distance (physics)**

EARLIER SOMEONE POSTED: "Two like-charged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N was Force = t...

**Chemistry **

If the molecular mass for a chemical is 151.97 g/mol and the enthalpy of formation is -1128 kJ/mol, the heat change will be _______kJ when 10.0 g of this chemical is formed.

**Chemistry **

Please :) N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be_____kJ/mol.

**Chemistry **

Please :) N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be_____kJ/mol.

**Physics**

Prove, geometrically, that a ray of light entering a plate of glass always emerges in a direction parallel to the incident ray.

**chem**

calculate the number of grams of alcohol present in 1.70 L OF 75-Proof gin. The density of ethanol is 0.798 g/ml. Proof--> twice the % by volume of ethanol(C2H5OH) present.

**c**

what is the average rate of change for the function g(x)=3x^2-4 over the interval (-1,3)?

**Physics**

Suppose that high-speed stroboscopic photographs show that the 200-g head of a golf club travels at 51 m/s just before it strikes a 50-g golf ball initially at rest on a tee. If the club head slows to at 36 m/s (in the same direction) after the collision, what is the speed of ...

**Physics**

Suppose that high-speed stroboscopic photographs show that the 200-g head of a golf club travels at 51 m/s just before it strikes a 50-g golf ball initially at rest on a tee. If the club head slows to at 36 m/s (in the same direction) after the collision, what is the speed of ...

**logarithms**

evaluate each log. Ln e^3 logbase(1/1000) expand each log. logbase5 radical41/43 logbase7 8xy^4/3z^3 logbase5 4(7radicalxy^z)

**chemisty**

Sulfuric acid reacts with hydrogen iodide to produce sulfur dioxide, iodine and water. a) write total ionic equation b)write net ionic equation

**college physics**

A rope is used to pull a 3.57 kg block at constant speed 5.10 m along a horizontal floor. The force on the block from the rope is 6.82 N and is directed 15° above the horizontal. (a)What is the work done by the rope's force? (b) What is the increase in the thermal ener...

**5th grade**

whoops! ok here are the letters for the word, bowaerrd. plz help!

**5th grade**

What are these words? _:pants::pencil:eraser. plz help me!

**college physics**

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.88 m by the horizontal 25 N force from the broom and then has a speed of 1.63 m/s,...

**science**

Answer the following for a body centered unit cell. Answers should be numerical, set r = 7.0. edge in terms of r, the lattice pt radius__? face diagonal in terms of r, the lattice pt radius__? body diagonal in terms of r, the lattice pt radius__?

**english**

Write a short analysis of the use of researching in your future industry ¡V how do they gather or use research ie: types of projects, proposals, etc¡K „³There are no souls who never do research, because without research they can¡¦t gain knowl...

**Math**

i got it!!! but im not sure if its right. plz correct if wrong!!!thnx. a) 47,962.20/26=1844.70/2(39)=$23.65/hrs b) 23.65*39+1.5*23.65*10=$1,277.10

**Math**

i got it!!! but im not sure if its right. plz correct if wrong!!!thnx. a) 47,962.20/26=1844.70/2(39)=$23.65/hrs b) 23.65*39+1.5*23.65*10=$1,277.10

**Math**

Agnessa receives an annual salary of $47,962.20 based on a 39-hour workweek. a) What is Agnessa's hourly rate of pay in a year with 26 biweekly paydays? Answer is $23.65 b) Using your hourly rate computed in part a), what would Agnessa's gross earnings be for a pay per...

**Math!**

$63,280.99

**Math!**

The actual expenses for the most recent fiscal quarter were 121% of budgeted expenses. If the budgeted expenses were $76,570 then what were the actual expenses? (round to the nearest cent).

**eng**

The first time you are caught plagiarizing, will the College let you away with it as long as you don't do it again?

**science**

Describe similarities between ice wedging and weathering caused by plant roots?

**Geography**

Hey, i'd like to know what this means: Tropical monsoon forests are located "between 10° and 25°N and S of the equator". What does this mean? I know that the 25°N and S of equator means that region near the equator, but what is that "10°"?

**Logarithums?**

I did this maths question and got the answer -ln0.1, but the correct answer is ln10. I checked the numericals using a calculator, to find that -ln0.1 is the same as ln10. How do i convert -ln0.1 to ln10?

**Trigo help!**

Ok, i've tried this question, and it brings me to no answers. Please help! Prove the following: secY(1+tanY)=6cosecY my workings: LeftHandSide: secY + tanY/cosY = 1/cosY + sinY/cos^2Y =(cosY+sinY)/cos^2Y = ??? How should i attempt this question?? Am i even on the right tra...

**Trigo!**

sorry, i found my mistake already.

**Trigo!**

Ok, i've tried this sum a million times and i cant get an answer. Somebody please check my workings and tell me what i did wrong! Thanks! Given 4≤y≤6, find the value of y for which 2cos((2y)/3) + √3 = 0 Here's my workings: 2.666≤(2y/3)≤4 2...

**Trigo!**

Ok, i did this maths trigo question, that says sinx-cos=2/3. I squared it on both sides to get sin2x=5/9 and did the sum. In the end i got two solutions, 16.9 and 73.1. However, when i substituted the answers back into the equation, only one of the 2 answers was correct! The o...

**math**

8(x+1)^2

**english**

Need to write a memo. Scenrio:You've been put in charge of planning a one-day departmental training seminar with Dr. Melaine Dobler as the speaker. You must make travel arrangements for the speaker, reserve company room large enough for the number of people attending,and r...

** facts in africa**

I never thought of it that way! Thanks

** facts in africa**

Why is it that more boys than girls go to school in Africa? It says that for every 100 boys there are 83 girls enrolled in school. Why so few?

**College**

Well Ms Sue, I would have, but when I did, you all ignored it for over 20 mins and went on to the easier questions. So is that a sign you do not understand the question? As for Bob, I appreciate you answering the question on the other post (even though it took over 25 mins). B...

**College**

The Power of a Power Rule Simplify. All variables represent nonzero real numbers. -5y^4(y^5)^2 / 15y^7(y^2)^3 I got: -5y^40 / 15y^42 Is this correct?

**Math**

Thanks. See my other post for a comment.

**chem**

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top...

**chem**

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top...

**arithmetic**

how many three-digit integers greater than 500 contain only odd digits

**Chemistry -- to Dr.Bob**

I know this convo happened a while ago lol. but i seriously don't know how to find the HCL pH for this: What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted with 100 mL of water

**physics**

You can comfortably hold your fingers close beside a candle flame, but not very close above the flame. Why? In a still room, smoke from a candle will sometimes rise only so far, not reaching the ceiling. Explain why.

**physics**

When a hot object is placed in contact with a cooler object, the hot object warms the cooler one. Can you say it loses as much temperature as the cooler one gains? Defend your answer.

**AP World History**

Provide me tips on how to complete the change over time essay (which deals with changes and continuties over time). I have to debate which events affected global trade systems the most (either political, economic, or social). I have to analyze how the spread of religions and t...

**Math**

hi everyone!

**Math**

(first question)odd numbers (second question)even numbers

**Math**

What do you call numbers that cannot be arranged into 2-row arrays? What do you call numbers that can be arranged into 2-row arrays?