# Posts by alia

Total # Posts: 63

**physics**

A skier starts at rest and glides (without friction) directly down the fall line from the highest point of a giant snowball with a radius of r=31.7 m . The skier can be observed as a point mass and the air resistance is negligible. What speed v does the skier have when she ...

**STE**

A polling firm, hired to estimate the likelihood of the passage of an up-coming referendum, obtained the set of survey responses to make its estimate. The encoding system for the data is: If the referendum were held today, estimate the probability that it ...

**physics**

if copper rod has a length of 2m at 30 °C. what is its length at 70 °C ?

**physics**

the speed of sound in air at 0°C is 330m/s. at what temperature will the velocity of sound become 366m/s ?

**science**

what could be a good title for : if u r making a booklet were u have to make a spaceship.and writing about how to prevent heat loss in your spaceship

**sc**

A car is moving on a straight road due north with a uniform speed of 50km/hour when it left through 90degree if the speed remains unchanged after turning the change in velocity of the car in turning process is

**Geometry**

How did you find a part of the assessment?

**maths**

a,b,cis natural numbers and the sides of a rightangled triangle theline from altitude to hypotenues is h if 1/a+1/b+1/h - 1 find a,b,c

**math**

the dimension of a cuboid are in the ratio 5:3:2.find total surface area ?given the volume is 810 cm cubic.

**Math (Finite)**

A thief is faced with a combination lock with five wheels. Each wheel has the digits 0 to 9. The correct sequence of 5 digits needed to open the lock has no repeated digits. What is the probability that the thief will guess the correct sequence on the first try?

**Chemistry (please Help!!)**

determine which experiences a lower effective nuclear charge. using words and/ or drawings explain why. A) an electron in a 2s or an electron in a 2p B) a valence electron on sulfure or a vance electron on silicon C) a valence electron on chlorine or a valence electron on ...

**mania**

Amita decides that she wants the molds to have a square base from originally having a rectangular prism with a volume of 28 cubic centimeters - how many possible molds can she use

**math**

9000

**math**

maria runs 7 miles in 80 minutes. At the same rate, how many miles would she run in 64 minutes

**science**

what is the difference between erosion transport and deposition????????????????????

**Science**

ms.sue but I need to define the land formations

**Science**

P.S NUMBER THEM

**Science**

I REALLY REALLY NEED HELP SO 1.I need to do an essay asking you (me)to explain what is the difference between erosion,transport,and deposition?... 2.another essay asking me to explain you (me) to explain the destructive and positive effects of a volcanic erupyion?... 3.a short...

**chem**

What is the molar mass of hydrogen?

**Math**

Sometimes when home builders are building a home, they need to have 2 or more congruent shapes, because is some shapes weren't congruent the house would probably be falling down lol. Or it wouldn't look right.. I hope this answer helped you.. :)

**Physic**

Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. each is attached to an identical string and suspended from the same point, as shown in Fiq.2. They repel each other and hang with separation 50.0 cm. The length of the string from the point of ...

**litreture**

Thank you alot Michel your answer helped me. English is my third language because of that I didn't understand the question deeply. your explaination made it very clear. Thank you :)

**litreture**

What are the main paradoxes of the last leaf story by O.Henry?

**geometry**

at a distance of 20m from a building, a person who is 3 m tall looks up at an angle of 25 degrees to see the top of the building. how tall is the building to the nearest meter?

**chemistry**

a solution (S) is prepared by dissolving 50.0 g calcium chloride in 250 ml volumetric flask wich is then filled with distilled water up to the line mark. calculate the molar concentration of solution (S)

**chemistry**

Which of the following statements is /are true? Answer a. None of he above. b. Impurities in a solvent raise the freezing point of that solvent c. All of the above d. Non-volatile impurities lower the boiling point of a solvent e. Ions lower the vapor pressure of a solvent ...

**Science**

i need the answers

**Probability-Math**

Please forgive me for posting this for the 3rd time but I really need to learn this: A researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate was 28. If he were to conduct a second study to reduce the maximum error ...

**Statistics & Probability**

A researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate was 28. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he include in his new sample? ...

**Statistics & Probability**

A researcher conducted a study of the access speed of 45 hard drives and concluded that his maximum error of estimate was 28. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he include in his new sample? ...

**Probability**

If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 , then what is the standard deviation of X? Select one: a. 3.00 b. 6.25 c. 2.50 d. 1.25 Please note that the answer for the above is stated as c.2.50. However, my answer ...

**Statistics & Probability**

Thank you!

**Statistics & Probability**

If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 , then what is the standard deviation of X? Select one: a. 3.00 b. 6.25 c. 2.50 d. 1.25 Please note that the answer for the above is stated as c.2.50. However, my answer ...

**Statistics**

Please can some one help me with the following: A fisherman finds that approximately 17% of all his fish go bad by the time he takes them to the market. The fisherman catches 1,000 fish. A. How many will go bad by the time he takes them to the market? B. Find the standard ...

**Statistics**

Please can some one help me with the following: A fisherman finds that approximately 17% of all his fish go bad by the time he takes them to the market. The fisherman catches 1,000 fish. A. How many will go bad by the time he takes them to the market? B. Find the standard ...

**calculus**

thnks Reiny.

**calculus**

just plug pi/4 right

**calculus**

-4/64 why 64 not 8

**calculus**

just tel me how to setup

**calculus**

*find the slope of y= 4/x +6 at the point (8,2) *evaluate the derivative at the point (pi,4) y=[tan(5x^8)]^3 please help

**physics**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...

**science**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...

**health**

it's C

**queue**

Amanda Fall is starting up a new house painting business, Fall Colors. She has been advertising in the local newspaper for several months. Based on inquiries and informal surveys of the local housing market, she anticipates that she will get painting jobs at the rate of four ...

**queu**

The Waterfall Buffet in the lower level of the National Art Gallery serves food cafeteria-style daily to visitors and employees. The buffet is self-service. From 7:00 A.M. to 9:00 A.M. customers arrive at the buffet at a rate of 10 per minute; from 9:00 A.M. to noon, at 4 per ...

**linear programming**

Globex Investment Capital Corporation owns six companies that have the following estimated returns (in millions of dollars) if sold in 1 of the next 3 years: Year Sold (estimated return, $1,000,000s) Company 1 2 3 1 $14 $18 $23 2 9 11 15 3 18 23 27 4 16 21 25 5 12 16 22 6 21 ...

**linear programming**

Exeter Mines produces iron ore at four different mines; however, the ores extracted at each mine are different in their iron content. Mine 1 produces magnetite ore, which has a 70% iron content; mine 2 produces limonite ore, which has a 60% iron content; mine 3 produces pyrite...

**Math-Algebra**

What Is 9/10 As A Whole Number?=D

**Number operations/math**

Bill is selling funnel cakes at the county fair. After lunch, he has 2/3 of his original funnel cakes remaining. That evening, when the fair closes, he determines he sold 5/8 of the reaming funnel cakes. What expression can be used to find the fraction of the original funnel ...

**Calculus**

Given that y=x^(5/2)- x^(-1/2) . a) Find the coordinates where the tangent line is parallel to the line y-4x-4=0. b) Find the coordinates where the tangent line is perpendicular to the line 2y-3x-12=0.

**chem**

(CH3)N2H2(l) + 2N204(g) = 3N2(g) + 4H2O(l) + 2CO2(g). consider the reaction b2n 150g of liquid (CH3)N2H2 & 80L of N2O4 at 27 degree celcius & a pressure of 2 atm. The gases produced are collected at 27 degree celsius in an evacuated 250L. Calculate: a) Partial pressure of ...

**literature**

If you consider The Call of the Wild to be an allegory, which one of the following statements would be true? A. Judge Miller represents the primordial condition. B. Buck represents some characteristic of humanity. C. John Thornton represents the civilized world. D. The book is...

**math**

).Find all numbers for which the rational expression is undefined. (4)/(v-2) 2).Find the lcm of (6+7u), (36-49^(u^2)),and(6-7u) ? 3). The speed of train a is 14 mph slower than the speed of train b. Train a travels 190 miles in the same time it takes train b to travel 260 ...

**WRITING SKILLS**

Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. I am in receipt of your order of February 10. B. This letter is to make you cognizant of our receipt of your order. C. Your order of February 10 arrived in our...

**E.L.A**

a cool title for the dust bowl

**ELA**

I know where to get the facts from,but I want to know what should I write in my reaserach on the Dustbowl (Remember 6th grade) thx

**ELA**

I still don't understand what to write about is there any 6th grade website for this???

**ELA**

What should I include in my Dust Bowl Reaserch???????

**Social Studies**

What should I put the title for the making of silk? (creative title) plz !!!!!

**Social Studies**

How is silk mage?What are the procedures? Also could there be an diagram for this ?

**Social Studies**

If you are writing a report on Ancient Egypt's Geograpy and the Nile Valley what do you write about?

**bio "plasma membrane"**

When a plasma membrane has a pressure of zero, passive transport STOPS IS THAT TRUE OR FALSE? I'M NOT TOO SURE.

**3rd grade math**

My daughter brought home this question: How does knowing 28=30-2 help you find 13+28? Any ideas?

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