Wednesday

January 18, 2017
Total # Posts: 407

**physics**

Consider a frictionless track as shown in Figure P6.48. A block of mass m1 = 4.30 kg is released from A. It makes a head on elastic collision at B with a block of mass m2 = 9.00 kg that is initially at rest. Calculate the maximum height to which m1 rises after the collision.

*July 16, 2010*

**English**

What do you think was Lance Armstrongs purpose in writing his book Its Not About The Bike?

*July 6, 2010*

**intermediate latin**

oh sorry for ten years the city of troy is said to have been attacked(or assaulted) by the greeks for ten years thank you so much

*June 26, 2010*

**intermediate latin**

the city of troy is said to have been attached by the greeks for many years

*June 26, 2010*

**intermediate latin**

thanks let me see... The city, Troy, having been attacked by the Greeks is being led for ten years. Luke

*June 26, 2010*

**intermediate latin**

Hey i need some assistance with translating this sentence thanks. Urbs Troja dicitur decem annos a Graecis oppugnata esse. thanks again

*June 26, 2010*

**english**

i need to do a poster to advertise a 'new' mobile phone it needs to stand out to the people who see it

*May 29, 2010*

**physics - electricity**

Does the size of a 1,5V cell(battery) affect the internal resistance of a circuit containing: 3 different size batteries,multimeter,connecting wire,a light bulb resistor.How do i set up this experiment.I'm really lost, please help. Thank you in advance

*May 23, 2010*

**12th grade**

Does the size of a 1,5V cell(battery) affect the internal resistance of a circuit containing: 3 different size batteries,multimeter,connecting wire,a light bulb resistor.How do i set up this experiment.I'm really lost, please help. Thank you in advance

*May 22, 2010*

**statistics**

I have a data set for MLB teams. the assignment is to form a hypothesis based on the set. h0- Teams with higher attendance will have a better ERA h1- attendance will not effect the ERA Preform a 5 step hypothesis test and show work for z and t test. I am not sure what kind of ...

*May 8, 2010*

**4th grade**

Equivalent fractions are fractions that may look different, but are equal to each other. Two equivalent fractions may have a different numerator and a different denominator. a/b=c/d

*May 6, 2010*

**Accounting**

I am trying to tell the difference between trade credit and opportunity costs, but now liking what I find on the internet. Is there a link that shows both? I could not find one. In order to do my assignment I need to compaire the two so I could figure out how opportunity costs...

*May 6, 2010*

**algebra**

What does you math book say about linear equations? These guys will not give you the answer. A system in which the outputs are components of a vector which is equal to the value of a linear operator applied to a vector whose components are the inputs.

*May 6, 2010*

**Accounting**

Chapter 17-19 reading HCA 270 Axia

*May 5, 2010*

**Math**

I remember that math question from Axia... MAT 115 final.

*May 5, 2010*

**math**

find the amplitude and period of: 2 cos4x + 5 sin4x

*April 27, 2010*

**maths**

if M = 3 x 6 ^ (-t) find the half life of M

*April 26, 2010*

**Geometry help**

What is the perimeter of a triangle whose sides measure 15cm, 17cm, and 10cm?

*April 21, 2010*

**math**

solve the equation 5 - √x = 2x^2 - 3

*April 14, 2010*

**math**

Identify 4 objects in the grocery store that hold lress than 10 milliters

*April 12, 2010*

**math**

Make f the subject of the formula D = √(p/f-p)

*March 30, 2010*

**math**

g is a linear function such that g(1)=7.5 and g(7)=12.6 Find the formula for g(x). I've tried doing it and the formula i got was: y = 0.9x + 6.6 is that correct?

*March 29, 2010*

**math**

correct

*March 29, 2010*

**math**

Make f the subject of the formula D = squareroot p/f-p

*March 29, 2010*

**make**

make f the subject of the formula: D=square root p/f-p

*March 29, 2010*

**math**

if f(x)=1-3x/2+x find an exact value of f(-1/2)

*March 29, 2010*

**maths**

exact value for tan(7pi/6 radians)

*March 23, 2010*

**8th grade**

3x _ 8> 10

*March 20, 2010*

**japan**

How do you say the restaurant is located inside the hotel. れすとらんはほてるのなかです

*March 4, 2010*

**economics**

A firm has production of cars in 2 countries with the following demand: Sweden: P= 300- 5Q Denmark: P= 150- 3Q Marginal cost for both countries= $40 per unit Will this company price discriminate, and if yes, which type of price discrimination will it use? What are the ...

*February 21, 2010*

**6th**

Deez nuts!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!got emm

*February 8, 2010*

**Physics**

Why has no one answered this?

*January 8, 2010*

**Chandra**

A building is the shape of an airplane hanger (a half cylinder). Construction for the foundation (rectangular part) costs $30 per square foot, the sides (semicircle bases) cost $20 per square foot and the roofing cost $15 per square foot. The volume of the entire building is ...

*November 23, 2009*

**Engineering**

What caution must be exercised in the use of models

*November 7, 2009*

**college**

Why is it not possible to formulate a model that accurately represents reality

*November 7, 2009*

**Chemistry**

which metal does not require having its charge specified in the names of ionic comppounds it forms? a. Au b. Ca c. Cu d. Cr e. Fe

*November 1, 2009*

**chemistry**

in regard to the reverse freezing process of water(when it expands) and others molecules contract.. is it only water that does this or is it all the hydrogen bonded molecules?? ( N,O,F) NH3, H20 anf FH...my science teacher doesn't know the answer and i'd really like to...

*October 13, 2009*

**math**

S=5d/7

*October 9, 2009*

**PHYSICS**

A potential energy function for a two-dimensional force is of the form U = 2.46x3 y - 5.05x (which has units of J). Calculate the force that acts at the point (1.26 m,1.18 m).

*September 29, 2009*

**PHYSICS**

If it takes 4.12 J of work to stretch a Hooke's law spring 12.1 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm.

*September 29, 2009*

**PHYSICS**

Estimate the terminal speed of a wooden sphere (density 0.700 g/cm3) falling through air if its radius is 3.20 cm and its drag coefficient is 0.470.

*September 24, 2009*

**PHYSICS**

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 23.0 degrees with the horizontal. A piece of luggage having mass 31.0 kg is placed...

*September 21, 2009*

**physics**

thanks for your help drwls.

*September 13, 2009*

**Physics**

thanks a lot. that really helped.

*September 13, 2009*

**Physics**

A fire helicopter carries a 615 kg bucket of water at the end of a cable 19.5 m long. As the aircraft flies back from a fire at a constant speed of 40.5 m/s, the cable makes an angle of 35.2o with respect to the vertical. Calculate the force of air resistance on the bucket

*September 13, 2009*

**Physics**

thanks a lot. that really helped.

*September 13, 2009*

**Physics**

Three forces acting on an object are given by F1 = (-8.79i + 8.34j) N, F2 = (7.06i + -3.02j) N, and F3 = (-3.05i) N. The object experiences an acceleration of magnitude 2.26 m/s2. What are the components of the acceleration vector?

*September 13, 2009*

**algebra**

I know its true but why? When you multiply a whole number by a whole number the result is a larger number. When you multiply fractions the result is a smaller number.

*September 1, 2009*

**Pre Algebra**

Solving part of a part. How do you use thermometers to solve fraction problems?

*September 1, 2009*

**10th grade Physics**

What experiment(apparatus can be made) can be used to determine the relationship between period and frequency of vibration?

*August 4, 2009*

**Spanish QUestions LOOK DOwn please!!!**

PLease look down. Thank you.

*May 14, 2009*

**spanish**

Write the correct conjugation of tener for the following sentences: 9. ¿Por qué _________ (Jose) sueño por la mañana? 10. Mi amiga _________ tres hijos. 11. ¿Cómo se dice "Patricio tiene ganas de comer" en inglés? 12...

*May 14, 2009*

**11th Grade chemistry**

How to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au

*May 13, 2009*

**geography**

Latitude lines measure distance in degrees north and south of this? is it equator?

*April 15, 2009*

**Algerbra**

Thank you

*March 15, 2009*

**Algebra 2**

Thanks

*March 9, 2009*

**Algebra 2**

Thanks reiny for your help.

*March 9, 2009*

**Algebra 2**

and would I do this oen the same way? 7. 2x^4 + 16x

*March 9, 2009*

**Algebra 2**

Thank you. So can that be factored anymore?

*March 9, 2009*

**Algebra 2**

I would really appreciate it someone helped me with this information. 1. Solve the inequality: |3 - 3x/4| >= 9 Solve for x 2.(x - 2)(x + 1) = 4 and factor completely 64 + a^3

*March 9, 2009*

**Algebra 2**

Can someone help me solve this and break it down step by step please??? [Sqrt(x-3)]-[Sqrt(x+2)]=3

*February 16, 2009*

**physics**

a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?

*February 12, 2009*

**math**

the rainfall this year was 18.6 cm. this is 3.2 cm less than half of the rainfall last year. what was the rainfall last year?

*February 5, 2009*

**Algrebra**

Thank you for your help.

*December 30, 2008*

**Algrebra**

Would the answer be no souliton?

*December 30, 2008*

**Algrebra**

NO it's postive 21

*December 30, 2008*

**Algrebra**

Please faCtor. Thank you for your help. a^2 + 4a + 21

*December 30, 2008*

**11th grade visual art**

first of all this is my first time so i don't know if i am doing it right. I need help i have holiday homework that i need to do but i cant find good enough info for question 1 and i don't understand how to do question 2 below i will write homework exactlty the same as...

*December 5, 2008*

**10th grade math**

23.333333333333333333333333333333 ... i think

*November 28, 2008*

**calculus**

consider the following function: f(x)=sqrt(50-x) find the linear approximation of f(x) at a=1

*November 13, 2008*

**chemistry**

a metal sample weighing 45.0g and at a temperature of 99.1C was place in 38.6g of water in a calorimeter at 25.0C. the calorimeter reached a maximum temperature of 32.8C. 1. calculate the specific heat of the metal. 2. what is the approximate molar mass of the metal?

*November 13, 2008*

**Chem**

A) 8 - 3.45 = 4.55 B) 29 - 25.30 = 3.70 C) 29 - 21.15 = 7.85 D) (I had the same homework) 1.effective nuclear charge 2.principle quantum number

*November 7, 2008*

**Math**

There is a long fence along the border of 2 mens property. 1 man is using the existing fence to make a cattle pen. He has 500 ft of fencing. Suppose the pen extends x ft away from the existing fence along the border. Find an expression for the area in terms of x.

*October 26, 2008*

**physics**

resists motion

*October 15, 2008*

**physics**

The force of ..... acts to transfer mechanical energy to thermal energy.

*October 15, 2008*

**Science**

thanks

*October 4, 2008*

**history**

i need to know some specific info like what was damaged, how many people died, how many people got injured, etc.

*September 10, 2008*

**history**

thanks!

*September 10, 2008*

**history**

can you give me more info for 9/11 (patriot day)?

*September 10, 2008*

**math ( Ms,Sue)ans i got**

for part 2 of the questions is it six $1.00 stamps + one $2.50 + one $1.20 and four $4.00 and how do i find the largest number of stamps that she can use from the collection to post a parcel and to list them

*May 22, 2008*

**math**

in a series of stamps annie must buy six of each one cost $4.00 one cost $2.50 one cost $1.20 one cost $1.00 she had to post a parcel and totals cost of postage was $25.70.what stamps can she use from the selection to make up this amount using a)as many $4.00 stamps as ...

*May 22, 2008*

**chem**

For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) <===> PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if any, will occur in ...

*April 29, 2008*

**Brainteaser**

It could be. I think the question leaves too much to the imagination!

*April 16, 2008*

**Brainteaser**

A man is on his hands and knees looking for a £5 note he has dropped. His search for the fiver continues for some time. Finally in the corner of the room he finds it. What is the first thing he does? Anyone know this?????

*April 16, 2008*

**language arts**

a person who studies and collects rocks for fun

*March 17, 2008*

**Chemistry**

Predict the sign of ( ∆H) in each of the following reactions: NH3 (g) + HCl (g) NH4Cl(s) ∆S = +, ∆G = - Fe (s) + Cu+2 (aq) Fe+2 (aq) + Cu(s) ∆S = +, ∆G = - Cl2 (g) + 2Na (s) 2NaCl (s) ∆S = +, ∆G = -

*February 8, 2008*

**science**

Predict the sign of ( ∆H) in each of the following reactions: NH3 (g) + HCl (g) NH4Cl(s) ∆S = +, ∆G = - Fe (s) + Cu+2 (aq) Fe+2 (aq) + Cu(s) ∆S = +, ∆G = - Cl2 (g) + 2Na (s) 2NaCl (s) ∆S = +, ∆G = -

*February 8, 2008*

**chemistry**

sorry, didn't even see that. how does 0.6973 sound?

*February 8, 2008*

**Science**

i want to know how you could get electric to an island in the middle of nowhere.

*December 18, 2007*

**Physics: Equilibrium and Inclined Planes**

12.8

*October 28, 2007*

**Geometry**

okay, thanks anyway.

*October 3, 2007*

**Geometry**

How do you divide a hexagon into 9 congruent parts?

*October 3, 2007*

**Geometry**

Find the value of z. Then find GE and EH and state whether E is the midpoint of line GH. GH = z + 6. EH =2z-4. GE=z.

*September 4, 2007*

**Spanish**

One of the countries in Central America uses Spanish as the official language of the country but also has 23 different Maya groups; each with its own dialect. What country is it?

*September 3, 2007*

**math**

what would x^2+y^2-4x+2y=0 (Equation for a cirlce) be in r^2=(x-h)^2(y-k)^2 form? tnx I will start you off... x^2+y^2-4x+2y=0 x^2-4x+y^2 +2y =0 x^2-4x+ 4 + y^2 +2y+ 4 =+ 4+ 4 (x^2-4x+ 4) + (y^2 +2y+ 4) =8

*June 1, 2007*

**Math**

Hi how would i solve this?? The equation of the cirlce is x^2+y^2-4x+2y=0. Determine the coordinates of the center and the radius of the circle. What do i do? anyone

*May 31, 2007*

**Math**

hi how would we solve a question like this? for the curve with eq'n 2x^2 - x - 1 y= _______________ x^2 - 2x - 3 determina all x- and y-intercepts I assume you meant y = (2x^2 - x - 1)/(x^2 - 2x - 3) both top and bottom factor but there is no advantage gained. However, the...

*May 21, 2007*

**Math**

I have no clue how to do this as no values were given and im confused. can someone explain plz? if x^3-y^3=m and x-y=N, express xy in terms of M and N This is one of those pure manipulation problems. you have to know that x^3-y^3 = (x-y)(x^2+xy+y^2) so n(x^2+xy+y^2)=m (x^2+xy+...

*May 3, 2007*

**math-factoring**

hi i was reading through the tutorials and havent really understood how to factor out a trinomial like 12x^4 - 5x^2y^2 - 2y^4 what would the 1st few steps be? Do a substitution: let v= x^2 and u= y^2 Now you have... 12v^2 - 5uv - 2u^2 (3v -2u)(4v+u) then go back and put the x ...

*May 1, 2007*

**math**

I'm not good at math! I need help with finding a decimal from a fraction. like 1/3, 13/15, 19/32 I can't figure out how to turn it into a decimal! Just divide the numerator by the denominator. Use long division or a pocket calculator. can u help mme because i get f,s ...

*March 13, 2007*