Tuesday

September 27, 2016
Total # Posts: 1,826

**math**

1x1x8

*November 30, 2010*

**PHYSICS**

A .01kg bullet traveling at 800m/s hits a disk with a radius of R=.1m at R/2 and leaves with a speed of 400m/s. what is the angular speed of the disk right after? (omega) I used conservation of momentum and the rotational inertia for a disk and found omega to be 8rad/s. Is ...

*November 30, 2010*

**physics**

A .01kg bullet traveling at 800m/s hits a disk with a radius of R=.1m at R/2 and leaves with a speed of 400m/s. what is the angular speed of the disk right after? (omega) I used conservation of momentum and the rotational inertia for a disk and found omega to be 8rad/s. Am I ...

*November 30, 2010*

**Chem**

1.105*10^-3 g that's the final answer

*November 29, 2010*

**Chem**

ksp = [Ca][C2O4] 2.3*10^(-9) = x^ 4.8*10^-5 = x now sub that in as C in n = cv then convert that answer to mass (m = n*Mm) and thats the final answer

*November 29, 2010*

**Statistics**

Please help me understand this question. Can a hypothesis test yield a statistically significant (say p<=0.05), yet practically meaningless result? Give an example of how this might happen.

*November 21, 2010*

**Statistics/2nd post**

How is the p-value of a hypothesis test related to type I and type II error?

*November 21, 2010*

**statistics**

How is the p-value of a hypothesis test related to type I and type II error?

*November 20, 2010*

**Math**

Is it possible to make a rectangle with a perimeter of 24 and an area of 32, and what would it look like?

*November 17, 2010*

**9th grade**

how do you do linear functions?...for ex.xy=6..whats the answer?

*November 15, 2010*

**Physics**

A boy pushes his friend across a skating rink. Since the frictional forces are very small, the force exerted by the boy on his friend's back is the only significant forece acting on the friend in the horizontal direction. Is the change in kinetic energy of the friend ...

*November 14, 2010*

**english**

thanks

*November 11, 2010*

**english**

what are are the characters names in royally jacked by Niki Burnham

*November 11, 2010*

**Physics**

A cart initially at rest on a horizontal floor requires a 365N horizontal force to set it in motion. We know that the coefficient of static friction is 0.64. What is the mass of the cart?

*November 9, 2010*

**physics**

problem says that a cannon ball is fired at a 30 degree angle off a 10 meter high wall at 80 m/s. Use work and energy to find it's impact speed. I worked out this out with the equation: (1/2)(mass)(initial velocity)^2 + mgy = (1/2)(mass) (final velocity)^2 + mg(y final) i ...

*November 9, 2010*

**physics**

A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 350 cm2. It is filled with oil of density 740 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1400 kg at equal fluid levels? 20 OK HELP: The pressure is constant at ...

*November 7, 2010*

**PHYSICS HELP**

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by FL (0.021 N·s2/m2)v2 The bat can fly in a horizontal circle by "banking" its wings at an ...

*November 4, 2010*

**Physics**

How do I know v^2? for a)

*November 4, 2010*

**Physics**

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by FL (0.021 N·s2/m2)v2 The bat can fly in a horizontal circle by "banking" its wings at an ...

*November 4, 2010*

**physics please hep**

Suppose that the graph of force vs. time for a very unusual spring has only straight lines. The cart hits the spring at t = 3.00 s, so force F = 0 up to that point. Then, after t = 3.00 s, the force increases linearly until it reaches a maximum at Fmax = 6.74 N at time t = 3....

*November 1, 2010*

**Math**

log base 2 (3r+5)= 5

*November 1, 2010*

**Math**

the 2 is the base...sorry!

*November 1, 2010*

**Math**

I don't understand how to solve equations with logarithms very well...can you help please? here is one im stuck on: log (3r+5)= 5 2 Thanks!!

*November 1, 2010*

**math**

But what is the work

*November 1, 2010*

**math**

If a circle is divided into 12 equal parts what is the degree measure for each of the 12 angles formed

*November 1, 2010*

**math**

What do they call bowling in hawaii

*October 29, 2010*

**math**

x/4+2x/3+x/6=1/2

*October 28, 2010*

**English**

How do I write my essay in third person? Just want some examples. Thanks!

*October 25, 2010*

**Chemistry**

Concentration of OH- left in a solution made by mixing 16.0 g of NaOH and 80.0 mL of 0.170M HNO3?

*October 25, 2010*

**Chemistry**

Chemical analysis of a gas shows that it contains one carbon atom for every one hydrogen atom. The densiry ofthis gas is 1.161 g/l at STP. What is the minimus oxygen volume needed at STP for the complete combustion of .500 mol of this gas?

*October 25, 2010*

**Physical Science**

I don't know?

*October 25, 2010*

**pre-algebra**

thanks!

*October 24, 2010*

**pre-algebra**

when i tried to simplify more, i came out with -1w...so i think so.

*October 24, 2010*

**pre-algebra**

can I simplify -4w/4 <--anymore than that?

*October 24, 2010*

**pre-algebra**

thanks!

*October 24, 2010*

**pre-algebra**

simplify: (-8)(x/-2) i know that -8/-2=4, but does it come out as 4x or 4=x?

*October 24, 2010*

**college**

find domain of f(x)=3/x+5 + 2radical x-1

*October 19, 2010*

**math**

if t is 30% of u and u is 60% of v, what is the percent of v is t?

*October 18, 2010*

**math-College Algebra**

1.8 minutes

*October 17, 2010*

**physics grade 11**

A car launches itself off a 20° ramp at the top of a 25m cliff travelling at 35 m/s. How long will it be in the air for and how far from the base of the cliff will it land?

*October 17, 2010*

**chemistry II**

What are the steps to balancing Redox reactions using the Valence method. thanks> ex problem: NH3+O2 -->H2O +NO

*October 17, 2010*

**english**

What do you think are the similarities between Cathy Freeman, Deriba Merga and Oprah Winfrey? Please explain to me in details..

*October 14, 2010*

**Math**

3/4=x/236 cross multiply 3 and 236 and drop down the 4and x to get 4x=708 and divide 4/4 and 708/4 and get 177

*October 13, 2010*

**physics**

I have two equations: #1) Tcos(theta)- 6.86=0 #2) Tsin(theta) = mass X acceleration I know that my acceleration is velociy squared/ radius (my given radius is 40cm) I'm supposed to solve for T and angular acceleration. I know I'd be able to do that if I could find what...

*October 12, 2010*

**i dnt get it**

63

*October 12, 2010*

**English**

metaphors are used to relate something we don't know to something we do. we use them all the time. "Life is a journey" would be an example of a metaphor. I'm comparing the concept of life to something I'm already familiar with.

*October 12, 2010*

**health**

what type of structure would indicate areas of responsibility and lead to the most efficient operation of a facility?

*October 12, 2010*

**health **

what is the function of the CDC, WHO & local health departments?

*October 12, 2010*

**health**

what are the major types of hospitals and how do they differ?

*October 12, 2010*

**9th grade**

15.5

*October 12, 2010*

**physics**

A student librarian picks up a 2.2 kg book from the floor to a height of 1.10 m. He carries the book 7.8 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?

*October 11, 2010*

**physics**

A 5.2 kg box is on a frictionless 36 degree slope and is connected via a mass less string over a mass less, frictionless pulley to a hanging 2.1 kg weight. What is the tension in the string if the 5.2 kg box is held in place, so that it cannot move?

*October 10, 2010*

**Communication**

Well, theoretically they could all be correct answers depending on what kind of quirks the employer has; but B is the answer you'd want to use.

*October 10, 2010*

**Physics**

I'm assuming by mu you mean the coefficient of friction, u(subk) to find it just sum your forces in the x and y directions and solve for u(subk) use the formula sum of the forces = mass x acceleration

*October 10, 2010*

**english **

Grammar and literature.

*October 10, 2010*

**english **

I need a website that will help me with my english because im making a C and i dont get any of the stuff in english 2 i need lots of help. Like stuff to study.

*October 10, 2010*

**physical science**

Calculate (to the nearest 0.1 u) the formula mass of these compounds. (a) rubidium nitrate, RbNO3 u (b) aluminum peroxide, Al2(O2)3 u (c) water, H2O u

*October 9, 2010*

**physical science**

Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in the air to form water and sulfur dioxide, SO2. Every 69 tons of H2S reacts with 97 tons of oxygen and forms 37 tons of water. How many tons of SO2 are formed

*October 9, 2010*

**social history hs (poverty)**

I'll check them out. I think I can work with the first site Thank you.

*October 7, 2010*

**social history hs (poverty)**

I can't seem to find a good website on the history of child poverty in america. I couldn't really find a good enough website that discusses the history of poverty in america. can you help me?

*October 7, 2010*

**algebra) **

i dont know ask google

*October 5, 2010*

**Chemistry**

A solution is prepared by adding 300 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? Kb for ammonia is 1.8 x10 -5

*October 4, 2010*

**french**

I don't understand this. Can anyone help me out? Thanks! Les pronoms employes avec les verbes de communication. Remplace le nom de la personne (ou le pronom) par le pronum correct. 1) Vous demandez a votre mere de vous attendre. Vous ______ demandez de vous attendre. 2) ...

*October 4, 2010*

**Physics**

A 4kg wooden block is placed on a wooden table, so the coeficent of friction would be 0.2. There is a string connected to both sides of the wooden block with a pulley system at the end of the table to go off and then each string has a different weight attached to it. On the ...

*October 4, 2010*

**science**

how are the biosphere and the cryosphere the same or similiar

*October 4, 2010*

**English**

What writing techniques reinforce the message? :)

*September 29, 2010*

**English**

For the poem, "Remember?" by Alice Walker, What is poem's message?

*September 29, 2010*

**ecology**

thank you!!!!!!

*September 29, 2010*

**ecology**

what is a long-term change that takes place in two species because of their close interactions with each other?

*September 29, 2010*

**english**

Read the poem Remember ? by Alice Walker and answer the questions. -> Why is the title effective? -> What metaphor is used in the poem and what other two poetic techniques does Alice Walker use?

*September 29, 2010*

**probability**

A box of 6 coins (penny, nickel, dime or quarter) worth $0.67 is shaken. What is the probability that a nickel is drawn first and then a quarter? Assume no replacement and that all coins are equally likely.

*September 28, 2010*

**probability**

The letters of the word Mississippi are placed in a hat. What is the probability that the first two letters drawn are both i if the first letter drawn is not replaced?

*September 28, 2010*

**College Chemistry**

Pb^2+(aq)+SO4^2-(aq) --> PbSO4(s)

*September 27, 2010*

**1th phyics**

A car traveling at 7.5 m/s accelerates 3.4m/s2 to reach a speed of 15.0 m/s. How long does it take for this acceleration to occur?

*September 26, 2010*

**11th phyics**

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

*September 26, 2010*

**social services hs**

phew! thanks :)

*September 24, 2010*

**social services hs**

I was wondering how someone could qualify for SRS services? SRS is social rehabilitation services... like food stamps, drug or alcohol rehab, finding child care, disability services, finding mental health services...etc I was going to call my local srs office but its too late ...

*September 24, 2010*

**chemistry**

what is the density of an 8.64 g sample of an unknown substance if the sample occupies 33.4 cm3?

*September 22, 2010*

**sandlapper**

that is easy because God helped me

*September 21, 2010*

**sandlapper**

i dont get that

*September 21, 2010*

**11th grade**

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s. (part 2 of 2) Find the displacement of the car after 4.4 s. Answer in units of m.

*September 21, 2010*

**11th grade**

11th grade phyics

*September 21, 2010*

**11th grade**

An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

*September 21, 2010*

**11th grade**

When Maggie applies the brakes of her car,the car slows uniformly from 15.4 m/s to 0m/s in 2.41 s.How far ahead of a stop sign must she apply her brakes in order to stop at the sign?Answer in units of m.

*September 21, 2010*

**11th grade**

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

*September 21, 2010*

**11th grade**

When Maggie applies the brakes of her car, the car slows uniformly from 15.4 m/s to 0 m/s in 2.41 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m.

*September 20, 2010*

**11th grade**

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

*September 20, 2010*

**11th grade**

A flowerpot falls from a window sill 38.8 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s. How much time does a passerby on the side- walk below have to move out of the ...

*September 20, 2010*

**11th grade**

The total trip on the bus took 6.66 h The average velociity was 60km/h

*September 20, 2010*

**11th grade**

A bus travel 250km south along a straight path with the average velocity of 84km/h to the the bus stop for 26 min. Then in it travel 240km with avrage 70km/h to the south.How long long did the hold trip take? What is the average velocity of the trip?

*September 20, 2010*

**physics**

A bus travels 250 km south along a straightpath with an average velocity of 84 km/h to the south. The bus stops for 26 min, then it travels 240 km south with an average velocity of 70 km/h to the south. How long does the total trip last?

*September 20, 2010*

**science**

which is higher 10degrees north or 65 degrees north?

*September 20, 2010*

**science weather**

would you expect to find a greater variety of climates on a hill at 11degreesN or at 65degreesN? whyyy? :)

*September 20, 2010*

**Chemistry**

5.00 g is equal to how many pounds?

*September 13, 2010*

**western civilization**

Describe the rise of Louis Napoleon and explain why and how he was able to have such an influence on France at the middle of the 19th century?

*September 8, 2010*

**english**

Reply to writearcher: Umm...north America, USA

*September 8, 2010*

**english**

Hey, I have to wright a SA on what I want to learn in English language arts this year. It's a full page SA and I'm in 7th grade. Please help me, Ive ben working on it bacicaly ever since I got home. I need help, PLEASE!!!

*September 8, 2010*

**physics**

A car starts from rest and travels for 4.9 s with a uniform acceleration of +1.8 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.7 m/s2. The breaks are applied for 1.50 s. 1) How fast is the car going at the end of the breaking period? 2) How far...

*September 6, 2010*

**world history**

Over the next two years I will be writing a 4000 word essay on a narrowly focused topic of my choice. I would prefer to do something in history, although there are plenty of other catagories in which my research question may be submitted. I would greatly appreciate any ideas ...

*September 5, 2010*

**MATH**

thanks everybody!!!!

*September 5, 2010*