Saturday

November 22, 2014

November 22, 2014

Total # Posts: 632

**Physics**

Sam pushes crates starting form rest across the floor of his classroom for 3 s with a net force as shown above. For each crate, rank the following from greatest to least: A 100N/30kg, B 75N/20kg C 50N/10kg 1. Impulse delivered 2. Change in momentum 3. Final speed 4. Momentum ...
*November 12, 2014*

**Physic**

Show the equation that 100g of 100C steam will completely melt 800g of 0C ice.
*November 9, 2014*

**Physic**

A penny on its side moving at speed v slides off the horizontal surface of a table a vertical distance y from the floor. a) Show that the penny lands a distance v√(2y/g) from the base of the coffee table. b) If the speed is 3.5 m/s and the coffee table is 0.4 m tall, ...
*November 7, 2014*

**Math**

Why 53
*October 15, 2014*

**Math**

Yes it want her to estimate first then find the product. I don't understand
*October 15, 2014*

**Math**

Estimate then record the product $53 times 4
*October 15, 2014*

**English**

I need help finding contradiction statements in the story to build a fire by jack london
*September 4, 2014*

**Algebra**

nathan wants to go to a hockey game with friends. Tickets are $18, but students can get discounted tickets for $12. They want to spend no more than $80, including $8 for parking. The vehicle they will take can only hold 7 people. Write and graph a system of four inequalities ...
*August 14, 2014*

**sociology**

explain The impact of preventive medicine and public health
*August 10, 2014*

**Math - 3rd grade summer work**

so, this doesn't follow any rule of physics that the ball would slow down with each bounce?
*June 22, 2014*

**Math - 3rd grade summer work**

A Super-Duper ball bounces twice its height when it is dropped. Carl dropped a Super-Duper ball from the roof of a 12-foot garage. How high will the ball bounce after 5 bounces?
*June 22, 2014*

**vocab**

i need help
*May 28, 2014*

**science **

2. I need help balancing this Na2(SO4) + CaCl2 „³ NaCl + Ca(SO4)
*May 28, 2014*

**language art**

One is a story called teacher hero: Erin gruwell by jerrilyn jacobs.the other is from zlata`s diary by zlata flipovic.
*May 12, 2014*

**language art**

What is one difference between the credentials of jerrilyn Jacobs and zlata filipovic? Jerrilyn jacobs is younger Jerrilyn jacobs provides a firsthand account Jerrilyn jacobs is a communications expert Jerrilyn jacobs is a teaching expert I picked b is that right?
*May 12, 2014*

**Algebra II**

what is the slope of any line parallel to the graph of 6x+5y=9
*May 12, 2014*

**math**

ok
*May 12, 2014*

**science**

Which evidence from the sea floor shows that tectonic plates move? A) the sea floor is youngest near a mid ridge and farther away. B) the sea floor is much older the cont. C) mid ocean ridges form the longest range of mountains on earth. D) the sea floor is thinner than the ...
*May 8, 2014*

**science 3 questions**

need help with the same things
*May 6, 2014*

**math**

x+9=2
*May 6, 2014*

**social studies**

I tried reading but I'm very confused. what answer do you think it is?
*April 28, 2014*

**social studies **

ANSWER! PLEASE!! which of the following most contributed the rise of Sumer? a. farming b. military power c. isolated location d. trade
*April 28, 2014*

**social studies**

okay. thank you!
*April 28, 2014*

**social studies**

what answers are you thinking?
*April 28, 2014*

**math**

amy is 5 feet tall shes standing 12 feet from a street light if amy's shawdow is 4 feet long which porportion could be used to find the height of the street light
*April 20, 2014*

**math**

there are 13 boys and 14 girls in mrs greens class if 3 of the students are absent today what is the ratio of students absent to students present?
*April 19, 2014*

**math**

A customer earned $3,262.50 interest on a 9-month CD. How much was the opening deposit?
*April 4, 2014*

**Chemistry**

thank you
*March 18, 2014*

**Chemistry**

The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.
*March 18, 2014*

**chemistry**

When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:
*March 3, 2014*

**chemistry**

Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HClO is a weak electrolyte. KClO(aq) + HBr(aq) KBr(aq) + HClO(aq)
*March 3, 2014*

**chemistry**

Predict the prdeucts of the following acid/base and precipitation reactions and balance the equations. Remeber to indicate (s), (l) or (aq Q1. HCI(aq) + Mg(OH)2(aq)----> Q2. Pb(NO3)2(aq)+ Na2S (aq)---> Q3. write the ionic equation for question 2.
*March 2, 2014*

**chemistry**

write the net ionic equation for the following molecular equation. 2Crl(aq)+3NaCO3(aq) ---> Cr2(CO3)3(s) + 6NaI(aq)
*March 1, 2014*

**chemistry**

what is the net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq) the same question says use H+ for the hydronium ion, CH3OOH for acetic acid and CH3COO for the ...
*March 1, 2014*

**Chemistry**

Predict the prdeucts of the following acid/base and precipitation reactions and balance the equations. Remeber to indicate (s), (l) or (aq Q1. HCI(aq) + Mg(OH)2(aq)----> Q2. Pb(NO3)2(aq)+ Na2S (aq)---> Q3. write the ionic equation for question 2. Can you let me know how ...
*March 1, 2014*

**Chemistry**

sorry your right its 2Crl3(aq) and 3NA2CO3(aq) apologies for the error.
*March 1, 2014*

**Chemistry**

how u explained the last post, can u please explain in details like that for this question. write the net ionic equation for the following molecular equation. 2Crl(aq)+3NaCO3(aq) ---> Cr2(CO3)3(s) + 6NaI(aq)
*March 1, 2014*

**Chemistry**

I got that answer wrong. You was right I didnt need H2O
*March 1, 2014*

**Chemistry**

Thank you! i will try that and see if i get it right and let you know of the outcome. Than you for your help much appreciated..
*March 1, 2014*

**Chemistry**

Also i would be very grateful if u can explain how u got the answer so i know how to work it out in future please.
*March 1, 2014*

**Chemistry**

so i should have CH3COO^- + H^+ ==> CH3COOH +H2O??? as my online test has four boxes
*March 1, 2014*

**Chemistry**

the same question says use H+ for the hydronium ion, CH3OOH for acetic acid and CH3COO for the acetate ion. answer + answer---> answer + answer it has four boxes, pretend the answer is one box. i hope this helps
*March 1, 2014*

**Chemistry**

net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq
*March 1, 2014*

**Chemistry**

net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq
*March 1, 2014*

**Stats**

Suppose that you are in a class of 31 students and it is assumed that approximately 10% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b) Compute the probability ...
*February 16, 2014*

**math**

Solve the set of linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 sove for a
*February 9, 2014*

**human and social biology**

what causes the decreases of the oestrogen levels and on which days of the cycle it occured?
*January 29, 2014*

**Algebra**

Solve the system by substitution. x + 3y = -4 2x + 2y = -8
*January 26, 2014*

**math**

thank you
*January 23, 2014*

**math**

the tigers played 20 baseball games during the summer. they won 4 more games than they lost. how many games did they win? how many did they lose?
*January 23, 2014*

**algebraI**

Airplane at 19,200 feet descending at a rate of 40 feet per second. Another airplane takes off and ascends at a rate of 60 feet per second. After how many seconds will the airplanes be at the same height? What is this height?
*January 21, 2014*

**Science :)**

which answers were right~checking my answers btw~
*December 18, 2013*

**math**

Miriam is four years older than Ricardo. 10 years ago she was 3 times as old as Ricardo was then. A) How old are they now B) determine whether your answer is correct by checking that it satisfies the conditions of the problems
*November 23, 2013*

**Chem year one**

yeah, that's what i meant.. but is the number of moles correct?
*November 22, 2013*

**Chem year one**

what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O + 5O2 ratio of 2:5 0.4...
*November 22, 2013*

**Chemistry: Organic Chemistry**

Optically pure 2-octyl sulfonate, a compound with a leaving group comparable to the tosylate and mesylate groups discussed in this chapter, was treated with varying mixtures of dioxane and water as solvent. The optical purity of the resulting 2-octyl alcohol, a solvolysis ...
*November 5, 2013*

**Finance**

Harrison Inc. has issued a zero/ coupon bond with par value of $1000. The bond pays no coupons until the end of the 6th year, at which point it pays 10% annual coupons. What is the issue (initial) price of this bond if it has a 20 year maturity and yield to maturity of 6%?
*October 7, 2013*

**Finance**

Suppose Preun Inc. issues $200 million in 60 day maturity commercial paper at a price of 99.35 par. (commercial paper is like a zero coupon bond. You buy it at a price of less than its par value and it pays the investor par value at the maturity date.) It then uses this money ...
*October 7, 2013*

**Finance**

Assume that Pelon Inc. has issued a 10 year maturity bond with a yield of 8%. Its coupon rate is 5% and the coupons are paid semi annually. Its par value is the value of this bond at the issue date?
*October 7, 2013*

**physics**

Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following.
*September 28, 2013*

**Math**

How many distinct real numbers x are true for f(x)=0. Explain. F(x)=x^2+(1/(500x^2-1000))
*September 16, 2013*

**university of phoenix**

It has been reported that 40% of children in the United States live in homes where both parents work to make ends meet. A school administrator claimed that more than 40% of children in his school district lived in homes where both parents work to make ends meet. In a sample of...
*September 2, 2013*

**Social studies**

How was New England and the southern colonies were alike? How we're they different?
*August 23, 2013*

**physics**

it's wrong !!!
*July 17, 2013*

**Physics (help steve)**

Exact solutions for many-body problems are rarely encountered in physics. The following problem deals with a non-trivial motion of four charges. Due to the symmetry of the problem it is possible to determine the trajectories of the charges analytically. Four identical ...
*July 9, 2013*

**Physics (help steve)**

A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at ...
*July 9, 2013*

**Physics (help steve)**

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in seconds will the ion ...
*July 9, 2013*

**Physics (help steve)**

A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at ...
*July 8, 2013*

**physics**

Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semi-major axis and a is the distance ...
*June 25, 2013*

**Physics**

Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally. The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods is l=30 cm. Assume ...
*June 25, 2013*

**Chemistry**

Why is a beehive used in the preparation of hydrogen
*June 4, 2013*

**math**

Verify that the function f(x)=x^3-6x^2+8x+4 satisfies the three hypotheses of Rolle's Theorem on the given interval [0,4]. Then find all numbers c that satisfy the conclusion of Rolle's Theorem
*June 1, 2013*

**chemistry**

how much heat would be required to warm the earth's oceans by 1 degree celcius if the volume of the earths oceans is 137x100000000km3 and the density of the seawater is 1.03g/cm3
*May 25, 2013*

**Business Fin303**

How do you solve and or what formula do u use to solve this question: A stock that pays a constant dividend of $2.5 forever currently sells for $24. What is the required rate of return?
*May 17, 2013*

**Statistics**

Maureen is a cocktail hostess in a very exclusive private club. The IRS is auditing her tax return. Maureen claims that her average tip last year was $4.75. To support this claim, she sent the IRS a random sample of 52 credit card receipts showing her bar tips. When the IRS ...
*May 5, 2013*

**life orientation**

discuss in a paragraph of 150 words ways in which one can take responsibility to provide safe and healthy living environment
*May 1, 2013*

**chemistry**

Three metals, iron, copper, and gold, have heat capacities of 0.450 J/goC, 0.385 J/goC and 0.129 J/goC, respectively. A 10g sample of each metal was heated in a water bath at 100oC. One of these metals will be placed in a Styrofoam cup containing 50.0 mL of water at 25oC. ...
*May 1, 2013*

**Calculus**

Find the derivative y= a^3 + cos^3 X
*April 29, 2013*

**Physics**

So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m?
*April 21, 2013*

**Macro **

Real Disposable (Billions) Consumption Expenditures (Billions) Savings (Billions) Income $100 $150 ____________ 200 200 ____________ 300 250 ____________ 400 300 ____________ a. Graph the consumption function with consumption spending on the vertical axis and disposable income...
*April 16, 2013*

**Macro Consumption Question**

(Simple Spending Multiplier) For each of the following values for the MPC (marginal propensity to consume), determine the size of the simple spending multiplier and the total change in real GDP demanded following a $10 billion decrease in spending: a. MPC = 0.9 b. MPC = 0.75 c...
*April 16, 2013*

**Accounting**

If you looking for the inventory at the beginning of March then you will ignore all of the question except for the beginning. Therefore your answer should be 6 units X the $27/unit= $162.
*April 8, 2013*

**chemistry/science**

Magnetic domains
*April 4, 2013*

**algebra**

I think its d
*March 29, 2013*

**organic chemistry**

what type of feature will be observd in the ei mass spectrum of chlorobenzene?
*March 25, 2013*

**geometry**

The measures of two consecutive angles of a parallelogram are in the Ratio 3:7. Find the measure of an acute angle of the parallelogram
*March 23, 2013*

**accounting**

No he should have credited the motor car as either inventory ( depending on the type of company he worked for) or an asset and the he should have credited the Accounts Payable account because the machine was brought on credit therefore it is a liability to the company and must...
*March 20, 2013*

**Statistics**

32% of adult internet users have purchased products or services online. For a random sampling of 200 adult users, find the mean, variance and standard deviation for the number who have purchased goods or services online?
*March 17, 2013*

**math**

Natalie is buying potatoes at the grocery store. If she buys 6 potatoes that each have a mass of 375 grams, what is the total mass of the potatoes, in kilograms?
*March 13, 2013*

**math**

if i cross multiply 1/2*4/22 what will i get.... just really need an example
*March 13, 2013*

**Chemistry**

You have 10.0 L of 1.2 M KNO3. What molarity would the KNO3 solution be if you were to take 2.5 L of it and dilute it to 10.0 L?
*March 6, 2013*

**statistics**

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 25.1 years of age. If the standard deviation is assumed to be 4.6 years, find the probability that a random sample of 34 U.S. women would show a mean age at ...
*March 5, 2013*

**Physics**

A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?
*February 26, 2013*

**Math**

The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute?
*February 26, 2013*

**algebra**

14+6x/18=40 6x/18=40-14 6x/18=26 x=26/6/18 =78
*February 24, 2013*

**physics**

A document ys to be reproduced using a duplicating camera where should the document be placed in order to obtain an exact copy
*February 24, 2013*

**physics**

0.16
*February 24, 2013*

**physics**

At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain a maximum horizontal range for the bullet(show your working)
*February 24, 2013*

**algebra**

27500
*February 24, 2013*

**Maths**

L=2x-1 W=x+3 Area =294cm find length and with of rectangle
*February 23, 2013*

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