Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 116

**physics**

A small rock passes a massive star, following the path shown in red on the diagram above. When the rock is a distance 4e+13 m (indicated as d1 on the diagram) from the center of the star, the magnitude of its momentum p1 is 1.1e+17 kg ·m/s, and the angle α is 116 d...

**math**

x = t − 2 sin t, y = 1 − 2 cos t, 0 ≤ t ≤ 6π Set up an integral that represents the length of the curve.

**physics**

A jumper of mass m=55 kg starts in a crouched position with the jumper's center of mass at a position y1=0 m. Just before the jumper leaves the floor, his or her center of mass is at y2=0.7 m. From another measurement, you have found that the velocity of the jumper's c...

**science**

A hoop of mass M = 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is also equal to vCM, since...

**calc**

Find the centroid of the region bounded by the given curves. y = 2 sin 3x, y = 2 cos 3x, x = 0, x = π/12

**Science**

What are ten observations made by Charles Darwin on his voyage and what are their significance?

**Algebra 1**

Thanks

**Algebra 1**

For the points R (9,4), A (-2,4) and T (9,3),find the length of the hornizontal and vertical sides of the figure.

**Algebra 1**

Explain why any two regular n-sided polygons would be considered to be similar and how knowing this information could help in solving real-world problems.

**Algebra 1**

A circular pool has a diameter of 12 feet. The pool is 5 feet deep everywhere. How much water is needed to fill the pool?

**physics**

A 8.05- g bullet from a 9-mm pistol has a velocity of 346.0 m/s. It strikes the 0.785- kg block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h = 16.04 cm, what was the velocity of the bullet as it emerged from the block?

**Chemistry**

2.5 mol Zn and 8.75 mol HCl react according to the equation Zn + 2 HCl −→ ZnCl2 + H2 . Calculate the amount in moles of ZnCl2 formed. Answer in units of mol

**Chemistry**

AgNO3 + NaCl → AgCl + NaNO3 . How many grams of NaCl would be required to react with 446 mL of 0.211 M AgNO3 solution? Answer in units of grams

**Algebra 1**

Thanks

**Algebra 1**

A train travels on a 30 mile long circular track that surrounds an entire city. What is the area of the city rounded to the nearest half mile?

**algebra 1**

Thanks

**algebra 1**

Once trees grow to a certain height, the trunks quit growing taller and only grow thicker. The forest rangers want to calculate the diameter of the cross-section of some trees in order to estimate how much they grew in the past year. They measured the circumference of the tree...

**MATH CHECK ANSWERS**

what?

**MATH CHECK ANSWERS **

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...

**MATH CHECK ANSWERS **

CHECK THESE MATH ANSWERS PLEASE 1. There are 18 boys and 12 girls in a math class.what is the ratio of girls to total students? A.18:30 B.12:30(I PICK THIS) C.30:12 D.30:18 2.which of the following ratios are equivalent to 6:9? Choose all that apply. A.3:2 B.18/27 C.30:45 D.24...

**socialstudies(CHECK ANSWERS)**

modern mexico check answers 7. Which of the following was largely responsible for the Mexican Revolution? A. separation from Spain B. the overthrow of Maximillian(I PICK THIS) C. widespread poverty D. lack of women's rights 9.Why did the Mexican Revolution most likely happ...

**socialstudies(CHECK ANSWERS)**

im not sure all it says is modern mexico

**socialstudies(CHECK ANSWERS)**

1. What marked the beginning of agriculture in the Americas? A. Native people began raising goats. B. The hoe was invented. C. Native people began growing maize.(I PICK THIS) D. The Spanish arrived. 2. Aztec aqueducts were an important accomplishment because they A. prevented ...

**socialstudies**

can anyone please answer these 5 before i scratch my brain out.i did the rest but these i couldnt get What marked the beginning of agriculture in the Americas ? A.Native people began raising goats. B.The hoe was invented. C.Native people began growing maize. D.The Spanish arri...

**English**

A. is

**Math**

an algebra book weighs 6 oz less than twice as much as grammar book. if 5 algebra books weigh the same as 8 grammar books, how much does an algebra book weigh?

**Math**

On a centimeter dot array, draw all possible rectangles with an area of 16 sq cm and sides whose lengths are whole centimeters. Label the lengths of two adherent sides of each rectangle

**english**

Identify the nouns and verbs in this sentence please. The Lord is my strength and my salvation; in him I will trust.

**english**

What are the nouns and verbs in this sentence? Life is full of choices, so I must learn to make good ones.

**math**

what is three less than 11 times a number is the same as the number decreased by 13. find the number

**math**

I don t understand it that well but now I do Ms.Sue is the best:D

**Math**

Stephen earned $55 last week. He spent 9% of his earnings on entertainment. What decimal represents this percent?

**Math {ASAP}**

x=2

**Pre-Calc**

thank you!

**Pre-Calc**

What's my next step??

**Pre-Calc**

for the conic y=5x^2-40x+78 find an equation in standard form and its vertex, focus, and directrix

**calculus**

thanks!

**calculus**

Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after 13 years. What is the annual interest rate for this bank account?

**Math**

Probability Review , How many different numbers can you make with the digits 2,3,and 4 if you can use each digit as many times as you want?

**History-The Early Greeks**

Why did the use of money help trade to grow?

**History-The Early Greeks**

Name three rights granted to Greek citizens that American citizens have today.

**History-The Early Greeks**

How did early Greek civilizations use their natural surroundings to prosper and grow?

**History-The Early Greeks**

Thanks!

**History-The Early Greeks**

Why did the use of money help trade grow?

**math**

105x212=22,260 estimated=22,300

**Math, mathematics of finance**

I am stuck on these two math questions. If nyone could help me solve them it would be greatly appreciated! Here is the information: Engineering estimates indicate that the variable cost of manufacturing a new product will be $35 per unit.Based on market research, the selling p...

**Chemistry**

Consider the following reaction. 4 Al(s) + 3 O2(g) → 2 Al2O3(s) It takes 1.00 L pure oxygen gas at STP to react completely with a certain sample of aluminum. What is the mass of aluminum reacted?

**Math**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

**Math**

If both masses are increased by 60% and the distance between them is halved, by what percent will the force of attraction increase?

**Math**

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

**Math**

The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely proportional to the square of the distance from the light source. If a desk is properly illuminated by a 74.0 w lamp 8.00 ft from the desk, what size lamp...

**science, ocean currents**

waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

**science, ocean currents**

waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

**Math**

$9 dollars

**physics**

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 81 km/h to 117 km/h?

**geometry**

The hypotenuse of a right triangle is 25 cm long. One leg of the same triangle is 7 cm long. What is the length of the other leg? Explain how you found your answer.

**Calculus/Trigonometry**

What is the value of x in the equation of an ellipse??? Equation of an ellipse - (x^2/a^2) + (y^2/b^2) = 1

**math**

3L+2k = 45

**4th grade**

what is a perpidicular ray?

**social studies**

I have found out that India spent over 7 billion dollars on the common wealth games. My question is that did they beat China's record on the money? I am pretty sure India did but I am still asking to double check.

**social studies**

I messed up on my other social studies question. i ment to ask if the BUILDER of the taj mahal had his hands cut off by emperor shah jahan. Is this true? i need proof if this is true. thanks alot

**SOCIAL STUDIES**

Is it true that Shah Jahan (emperor who built the Taj Mahal) was forced to cut off his hands after he built the Taj Mahal? If this is true then I need proof. I tried going on wikipedia but it doesn't say anything about that on history or any other heading. Please tell me i...

**SOCIAL STUDIES**

I am doing a country project on India. I need some good toursist attractions from India. I know a one and that's the Taj Mahal. But I need some more. Please list a few more tourist attractions, it will be a great help! thanks alot!!!

**SOCIAL STUDIES**

I am doing a country project on India and I need to know the climate of India. I tryed looking for some facts but I didn't find any. Please suggest me some good sites for finding the climate of India or just give some good facts for India's climate. Thanks alot!!!!

**calculus**

Find derivative(use logrithmic functions). y=x^-cosx

**calculus**

Find the derivative of the function. (y^2/(y+3))^3

**calculus**

find the derivative of g(y)= (y^2/(y+3))^3

**calculus**

yea i knw... thnxx foh ur help

**calculus**

Find the limit for the given function. lim t-->0 (sin(8t))^2/t^2

**chemistry**

2NaOH + H2SO4 ---> Na2SO4 + 2H2O n = (Molarity)(vol) n= (0.10M)(0.04L) =0.004moles of H2SO4 0.004molesH2SO4 * 2moles NaOH/1mole H2SO4 = 0.008moles NaOH so M= n/v v=n/M = 0.008/0.50 = 0.004L 0.004*1000 = 4.0 ml

**calculus**

find the derivative of y= 3-secx/tanx

**Calculus**

Find an equation of the tangent line to the curve at the given point. (Assume the tangent line form to be f(x) = mx + b.) y= e^x/x (1,e) I got m= 0 nd b=e could anyone tell if its right?

**math**

i dont no the answer.gosh some 1 help ahhhhhhhhhhh!'

**Social Studies**

Sorry but that is what I just said I didnt want. Could you give me a specific article?

**Social Studies**

I need help finding a current event. I have looked everywhere and can't find one. It is supposed to be about catholic schools week and has to have happened anytime between last sunday and today. please dont give me one about a certain school. i would like one about the gen...

**my math**

True or false? Intentionally writing a check on an account with insufficient funds is allowed under certain conditions. I say false? Ben Spender writes a $50 check which is returned by his bank with additional charges. The company he wrote the check to, Art Supply Inc., also c...

**math**

2000

**math**

last year Jodie invested $10000, part at 6% anual intrest and the rest at 8% annual intrest. if she recieved $760 in intrest at the end of the year how much did she invest at each rate. help is much appreciated plz help!!

**algebra**

thank u

**algebra 1**

ok thank you

**algebra 1**

-2/3z=-4/9 i tried to solve, but i keep on getting the wrong answer, and i do not understand what i am doing wrong. please help.

**Math Word Problem**

i do not know how to answer this question i was searching for the answer but nobody has it hhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeelllllllllllllpppppppppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

**science**

Did you forget to put your question?

**Algebra**

If you are asking what it looks like, it should be lower on the left side and higher on the right side. Pretend there is a general line following the direction that the dots are pointing. My teacher always told us that there is a little man that always starts walking on the ve...

**Math**

By saying "how much" do you mean in ounces? If you do, then remember that there are 16 ounces in 1 pound. Half of 16 is 8, so add that to 16 and you get 24. That means 24 ounces = 1 pound and a half. Then, divide that by 3 to get a third, which is 8 ounces. If you ju...

**Algebra**

Solve by graphing. Check your solution. y > 2 y > -x + 2 Am I supposed to graph this one on a line or on an actual graph? Thank you.

**Science**

How would carbon-14 help scientists determine the earliest explorers of the new world?

**world geogrophy**

If you were in downtown CHICAGO and facing north, what direction would u go to reach lake michigan?

**world geogrophy**

BOLIVIA is one of two landlocked country in south america. what is the name of the other countries?

**world geogrophy**

How many states are west of mississippi river?

**world geogrophy**

The prime Meridian passes through which three continents?

**world geogrophy**

What is the capital of the state that is borded by colorado, nebraska, missouri and oklahoma?

**world geogrophy**

What river flows just south of cincinnati,Ohio?

**world geogrophy**

What is the Caribbean island with the second largest land area?

**social studies(World Geogrophy)**

a straight is a narrow body of water connecting two larger bodies of water. Find an example of a strait on a map, and write the example...... PS.I DO NOT UNDERSTAND.. PLEASE PLEASE HELP!!!!!

**social studies(World Geogrophy)**

is mississippi east or west of alabama? I am not sure if it is east or west!!..

**social studies(World Geogrophy)**

Which sea is the largest: North,Mediterranean,caspian,OR South China???????:( I think it is South China..??:):(

**social studies(World Geogrophy)**

1) name the five great lakes.. 2)what is the capital of north dakota, a state admitted to the united states in 1889? Thanks:)

**social studies(World Geogrophy)**

In which hemisphere(s) is the Russian Federation located?

**Rhetoric**

This is what I think, I'm not sure. I know this discussion is probably well over, but I'm kind of voicing my own thoughts to whoever may need this later. -"Leave no child behind" is Sentimental Appeals (I typically connect children or cute animals to sentimen...