Monday

April 21, 2014

April 21, 2014

Total # Posts: 893

**Physics **

f a 40 kg weight and a 200 kg weight each dropped from 1 m above the trampoline, find the final position of each weight. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I was able to get the answer to this, using mg(h+x) = 1/2kx^x...

**English grammar**

Thanks

**English grammar**

Who can give me a good explanation with examples for the following conjunction. a) while b) unless

**math**

if 10 of the 50 pieces if candy are green, then what percent of the pieces of candy are green?

**math**

Rachel , smith , john and Thomas brought in 300 pennies for the penny harvest . Smith brought in 2/6 of the pennies . Rachel brought 1/5 and Thomas brought 1/4 of the pennies. How many pennies did john bring in?

**trigonometry**

a clock has a dial face of 12 inches radius the minute hand is 9 inches while the hour hand is 6 inches the plane of rotation of the hour hand is 2 inches above the plane of rotation of the minute hand. Find the distance between the tips of the minute and hour hand at 5:40 am.

**math**

please solve 100 divided by 5 to the 2nd power times 4 to the 3rd power.

**math**

Andrew wants supplement his pension with investment interest if he invests 28,000 at 6% interest how much would he have to invest a t 7% to achieve the goal of 3,000 per year in supplemental income.

**math**

the first term of a geometic sequence is 3 and the sum of second and third terms is 60 determine the first three terms and the general terms tn.

**math**

show that x(-4,-3) and y(4,3) are endpoints of a diameter of the circle x^2 + y^2 = 25

**pre calculus**

2k^2+5k-9

**pre calculus**

2k^2+5k-9=0

**pre calculus**

x^2-3x-7=0

**pre calculus**

x^2-3/4x+1/8=0

**pre calculus**

2x^2+11x-21=0

**chemistry**

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas

**social studies**

how did poverty affect the aboriginal in canada in last 500 hundred years ?

**us history**

did the federalist support a strong or weak federal government????

**chemistry**

Write a balanced equation for the dissociation of Mg(NO3)2. I wrote Mg(NO3)^2(s)==>Mg^2+(aq)+NO3^3-(aq) That isn't the answer in the book. Can someone explain to me how dissociation works?

**chemistry**

Write the balanced equation for the hydration of CuSO4. Indicate the physical states using the abbreviations (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) to indicate the aqueous phase. Indicate appropriate charges on negative and positive ions if they are...

**chemistry**

How would i use the grams in this equation though?

**chemistry**

A 0.286g sample of carbon dioxide, CO2, has a volume of 585mL and a pressure of 495mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas?

**Chemistry**

What is the volume in liters of 3.0moles methane gas, CH4, at 12∘C and 1.48atm ?

**Science**

contact Lenses improve lives. Contact lenses are an example of an __________. my answer is indepentant variable. Someone help. it's for a science experiment.

**Physics **

Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration: a= dv/dt = g - kv, where k is a constant. (a) Derive a formula for the velocity of the body as a function of time assuming it starts from rest (v=0 at t=0). [Hin...

**math grade 10 **

Solve 3p-6q = 0 4p+1q = 3 Using any method Thank you!!!!

**algebra**

A rectangular box has Dimensions 16 inches and 22 inches and volume 4224 cubic inches. If the same amount is decreased from the largest and smallest sides, the volume of the new box is 6/11 of the first box. Find the dimensions of the second box.

**Maths**

At the beginning of the week, a particular stock sold for 29 3/8 per share. At the end of the same week it sold for 31 2/8. What was the amount per share?

**english 101**

which of the above topics are appropriate for an expository essay? why do you think so? which of the above topics are appropriate for a persuasive essay? explain. what differentiates an expository essay from a persuasive essay?

**CIS**

Chocolate Delights Candy Company manufactures several types of candy. Design a flowchart using Visual Logic for the following: A program that accepts a candy name (for example, “ chocolate-covered blueberries”), price per pound, and number of pounds sold in the avera...

**Statistcs**

Please help I am so lost and my book shows me nothing helpful. You are interested in the incomes of your customers. A sample of 100 customer incomes yields a standard deviation of $141,421 and a mean of $300,000: a. Determine the point estimate b. Determine the interval estima...

**Chemistry**

What is the Lewis structure formula, electron pair geometry and the molecular geometry for SO4^2-

**earlychildhood**

when a teacher hears a preschool student using incorrect language she should

**bacteria**

at 52 degrees F, how fast does bacteria grow? At 37 degrees F, how fast does bacteria grow?

**Physics**

A block of mass m1 is on top of a block of mass m2. Block 2 is connected by an ideal rope passing through a pulley to a block of unknown mass m3 as shown. The pulley is massless and frictionless. There is friction between block 1 and 2 and between the horizontal surface and bl...

**math**

4800

**math**

if you have two thirds of lace and another pattern calls for five ninths of lace,how much more did the first pattern call for?

**chemistry**

Is benzophenone soluble in phosphoric acid?

**english**

ms sue can u help me?

**english**

ive read the book. im having trouble answering them...

**english**

questions based on the book to kill a mockingbird: describe mr radley(not nathan radley. what does jem do to thank their mysterious benefactor and what happens after.

**english**

i have read the book and im having trouble answering them.. i cant seem to find the answer in the novel

**english**

these are questions based on the book to kill a mockingbird 1. how does atticus explain to scout a way of getting along in school and with other people, in chapter 3 2. why does atticus think it is just as well that the ewells do not attend school, chapter 3 3. what does his c...

**analytical chemistry**

chemical equilibria involved in precipitation reaction

**english**

this is for to kill a mockingbird why does scout call the boy 'a pocket Merlin"? AND briefly describe mr.radley?

**english**

thank you

**english**

this is for the book to kill a mockingbird what is significant about Mr. Cunningham kneeling down and saying to Scout "i'll tell him you said hey, little lady"

**math**

given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .

**math**

Use the distributive property 3(x+ 4) = 3*x + 3*4 = 3x + 12

**algebra**

x = number of ones y = number of tens x+ y = 57 x + 10 y = 156 hope this helps

**Math**

base of large triangle is to base of small triangle as 96 miles is to 31 miles. base of large triangle is to base of small triangle as leg (m) of large triangle is to leg (31) of small triangle Does this help?

**Math**

If an area of a parallelogram is 8x+2 with a height of 4. What is the length of the base?

**math**

If the distance between location A to B is straight east 10 km. then from B to C is Nw 18KM How far would you be from point C to A. Would you not need to more information then this to calculate this answer?

**Life science, history, geography, and maths literacy**

You can become tour guide,museum,metiorolist

**math **

A plane leaves hamilton and flies due east 75 km at the same time a second plane flies in a direction of 40degress southeast for 120 km how far apart are the planes when they reach their destination. I say the calculation is 75^2+120^2-2(75)(120)cos40 the book says to use cos ...

**math**

Am I missing something here. They way I read this is that the answer is already given 9.5m. or are they after the angle of the ground to guy wire? The guy wire is 13.4m long. It supports a vertical power pole. The wire is fastened to the ground 9,5m from the base of the 8.7m t...

**math**

Susan Borrowed $5000. The term of the loan is 12% compouned monthly for 3 years. what is the monthly payments? How much must she pay at the end of of 1 year to pay the balance off? How much did she save in interest by paying the loan off in one year??

**HELP!!!!**

Is there any good colleges in NEW YORK for COUNSELING PSYCHOLOGY????

**math**

5^0/5^-6 * 1/5^-11 / (5^2)^4/(5^10)^2

**math**

-(-2)^0*(-2)^3*(-2)^-4/(-2)^3

**physics 20**

The problem goes not include that information

**physics 20**

Two people, a and b, are pulling on a tree with ropes while person c is cutting the tree down. Person a applies a force of 80.0N (45.0degrees) on one rope. Person b applies a force of 90.0N (345degrees) on the other rope. Calculate the net force on the tree.

**Life orientation**

Dxuscuss 5 way in which the human or invromental problem impact on the community

**algebra**

a model rocket is shot straight up from a roof the height at any time t is aproximated by the model h=-t(squared) +3t+28,where h is the height in metres and t is the time in seconds . When does the rocket hit the ground?

**Geometry Inscribed**

line BC is tangent to circle A at B and to circle D at C (not drawn to scale) AB=11, BC=23,and DC=2. find AD to the nearest tenth. Image: i.imgur(dot)com/f4ThxTu.jpg

**Life orientation **

In 15 line critically discuss 5 way which the human problem impact on the community for teenage pregnancy

**Finance**

P5. Use your knowledge of income statements to fill in the missing items: SALES - $------ COST OF GOODS SOLD - $575,000 GROSS PROFIT - $1,600,000 GENERAL AND ADMINISTRATIVE EXPENSE - $200,000 SELLING AND MARKETING EXPENSE - $------ DEPRECIATION - $50,000 OPERATING INCOME - $--...

**Finance**

P2. Use your knowledge of balance sheets to fill in the missing amounts: Assets: CASH - $10,000 ACCOUNTS RECEIVABLE - $100,000 INVENTORY - $------ TOTAL CURRENT ASSETS – $220,000 GROSS PLANT AND EQUIPMENT – $500,000 LESS: ACCUMULATED DEPRECIATION -$ ------ NET PLANT ...

**grade 9 english**

I have read the story I need help answering this question from act 1, scene 1!

**grade 9 english**

My question is about the story a midsummer nights dream, in act one 1. Why does helena wish her 'tongue should catch(hermia's) tongue's sweet melody'(189)

**chem!!!!!!**

chemistry, my textbook is modern chemistry i found the actual problem: 2.8% hydrogen, 9.8% nitrogen,20.5% nickel, 44.5% oxygen, and 22.4% sulfur determine empirical formula for compounds

**chem!!!!!!**

empirical formulas" p 889(153e)

**chemistry**

what mass of Fe3O4 would conatin 1.85*10^21 atoms of Fe?

**chem**

if a sample of iron(III) oxide contains 22.56g of iron, what is the mass of the sample? do u just find the molar masses?

**chemistry**

A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?

**chemistry**

thankks again!!1

**chemistry**

sorry, sent it twicee

**chemistry**

the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

**chemistry**

the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

**Guidance and Discipline**

following ideas?

**chemistry**

Thank you soooooooooooo much!!!

**chemistry**

a sample of glucose, c6h12o6 contains 2.03*10^21 atoms of carbon. (a)how many atoms of hydrogen does it contain? (b)how many molecules of glucose does it contain? (c)how many moles of glucose does it contain? (d)what is the mass of this sample in grams? its kinda long, but i w...

**edu**

i think your right, its c

**chemistry**

plug in the molar mass? is mass the same as molar mass?

**chemistry**

how many grams of CO2 can be formed by the complete combustion of a 14.7 sample of C2H6 that is 92.4% pure?( assume the impurities contain no carbon)

**physics**

An aircraft in a straight line with a constant speed of 450km.h ,What is the magnitude of the resultant force acting on the aircraft?

**chemistry**

5* 12.01+ 12*1.01= 60.05 g/mol c H 1 mol of C= 60.05g/mol next step?

**chemistry**

how many c atoms are contained in 15.63g of c5h12??

**math**

(b) 1 to 10 what kind of proportion?

**chemistry**

A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?

**chemistry**

honestly I would love to, but theres no more info or instructions on my worksheet, makes no sense thanks for trying tho:)

**chemistry**

"empirical formulas" p 889(153e)

**chemistry**

umm... i need some help, sorry but how do you convert them?? my chem teacher isnt the best :(

**chemistry**

"empirical formulas" combustion of a 0.255g compound conatining only C,H and O, yields 0.561g CO2 and 0.306g H2O. what is the empirical formula of the compound?

**chemistry**

A 2.50g sample of a hydrate of calcium nitrate was heated, and only 1.70g of the anhydrous salt remained. what is the formula of the hydrate?

**science**

after some research, they definetly dont have segmented bodies, i dont think its shell either, and hollow doenst sound correct, so my answer is round bodies might need to clarify planarians are not parasitic hope this helps!

**chemistry**

thanks!!

**chemistry**

a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?

**chemistry**

thank you!!

**chemistry**

if 125g of magnesium sulfate heptahydrate is completely dehydrated, how many grams of anhydrous salt will remain? i would really appreciate anyone's help

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