Saturday
November 22, 2014

Posts by kay


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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