Saturday

April 19, 2014

April 19, 2014

Total # Posts: 369

**Math**

z+1/z=2; z=? (1/z is a fraction) Please show work. I got C.1 as my answer. A.Square root of 3 B.1/2 C.1 D.1 1/2 E.2

**physics**

Two wires are anchored at both ends. Wire 1 has a mass of 105 grams and a length of 6.9 m. Wire 2 has a mass of 60 grams, a length of 20 m, and a tension of 143 N. What must be the tension in Wire 1 if its third harmonic is to equal the first overtone of Wire 2? T_{wire1} =

**Chemistry**

Which nucleophile, when reacted with 1-bromopropane (CH3CH2CH2Br), would produce a thiol? OH- SH- I- -OCH3

**chemistry**

Which nucleophile, when reacted with 1-bromopropane (CH3CH2CH2Br), would produce an ether? I- OH- -OCH3 SH-

**Chem**

A 7.00 mL sample of blood serum has a pH of 7.38 a. What is the concentration of H3O+? b. What is the concentration of OH-? c. How many moles of H3O+ are present? I have no clue what to do and I don't have a calculator with me someone help me I would really appreciate it.

**physics**

A construction worker riding in the tray of a truck traveling at 10 m/s, sees one of his friends passing and decides to jump off the truck. The magnitude of his initial speed of jumping is: (a) zero (b) Less than the truck's (c) Equal to that of the truck (d) Greater than ...

**poem**

Thanks

**poem**

so can the fourth line be: and went for the sewer

**poem**

then can the fourth one be: and became boor

**poem**

can i start the third line like this?: When he got poor fourth line: and went for a call. line 5: And the sun turned sunny.

**poem**

ok

**poem**

Title:The dawn it comes There once was a boy named John whose never saw the dawn. When the sun went down and went to the pond. And saw what was dim. Is this a good poem? This is a limerick, lines 1,2,and 5 must rhyme.Lines 3 and 4 must rhyme. Please help if can.

**chem **

Mercury(II) Oxide decomposes upon heating, producing elemental mercury. This reaction has an enthalpy value of 90.8 kJ/mol. How much heat is required to produce 2000 lbs of mercury?

**chemistry**

which of the following tetrahedral molecules is polar? please explain CH4 CF4 CH3F thanks

**chemistry**

what is the correct name for k2o

**Physics**

1) Car - S = 50 (50m to travel to reach truck since truck is moving away at a constant acceleration) u = o a = 3 t = ? S = ut + 0.5*a*t^2 50 = 0 + 0.5(3)t^2 t = sqr(100/3) = 5.77s 2) S = 50 u = o v = ? a = 3 t = 5.77 v = u + at v = 0 + 3*5.77 v = 17.3 m/s 3) S = - u = o v = ? ...

**chemistry**

In which of the following triatomic molecules or ions are both of the bonds multiple bonds? HCN CO2 NO2 more than one correct response no correct response If more than one correct response then please show all the correct answers. thanks

**chemistry**

the number of nonbonding electrons exceeds the number of bonding electrons in the Lewis structure of which of the following molecules? HCN NH3 H2O more than one correct response no correct response if more than one correct response please show all correct responses. thanks

**chemistry**

Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank

**chemistry**

in which of the following pairs of compounds are both members of the pair molecular compounds? PCl3 and LiBr CCl4 and KOH NaH and CaF2 more than one correct response no correct response if more than one response please show all the correct answers thanks

**chemistry**

Which of the following statements concerning differences between ionic and molecular compounds is correct? Molecular compounds contains two elements, and ionic compounds contain three of more elements ionic compounds contain oxygen, and molecular compounds do not. molecular co...

**Chemistry**

Thanksss!!! :D it worked much appreciated!

**Chemistry**

I tried that but my answer is 6.56*10^(-7) and when I plug it in the site tells me my answer is wrong what went wrong?

**Chemistry**

An electron transition in a single H-atom from n=3 to n=2 results in the release of a single photon. What is the wavelength of this photon in nanometers? How do I solve this?

**English**

As successful as... ? what can successful be compared to as a simile?

**math**

these are some weakness on these questions.

**math**

The product of a number and 2 has the same value as that number minus 2. What is that number? not just an answer. A.-4 B-2 C.-1 D.0 E.2

**math**

ok

**math**

The sum of a negative integer and 2 has the same value as the square of that integer.What is the integer? not just an answer. F.-2 G.-1 H.0 J.1 K.3

**math**

The sum of a nonzero integer and zero has the same value as the square of the integer.What is the integer? not just an answer. A.-2 B.-1 C.0 D.1 E.2

**Homework Help: Solar Energy Please HelpASAP**

courses edx org/c4x/DelftX/ET3034TUx/asset/Week5_Specturm png this is the link to the image ..

**Homework Help: Solar Energy Please HelpASAP**

d) In the up-convertor 1, two photons are converted into one photon with 100% conversion efficiency. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, in which spectral range can the photons be up-converted so that they contrib...

**algebra**

thanks man

**algebra**

simplify the number using the imaginary unit i. √-16

**phyics**

A ball is thrown straight upward. At 5.00 m above its launch point, the ball’s speed is one-half its launch speed. What maximum height above its launch point does the ball attain?

**Phyics**

A hot-air balloon is rising upward with a constant speed of 4.00 m/s. When the balloon is 4.77 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

**Math**

A poster is 3 times a long as it is wide. A banner is 5 times as long as it is wide. Both the banner and the poster have perimeters of 24 inches. What are the length and width of the poster and the banner

**algebra can someone help my buddy ray out **

identify the vertex and the axis of symmetry of the graph for the function y=3(x+2)^2 a.vertex(2,-3 axis of symmetry x=2 b.vertex(-2,-3) axis of symmetry x=-2 c.vertex(2,3) axis of symmetry x=2 d.vertex(-2,3) axis of symmetry x=-2 identify the maximum or minimum value and the ...

**URGENT ALGEBRA 2**

im not sure steve should be able to give you the answer im stumped on this one to ray

**reading**

Ok thanks

**reading**

How do I read and not lose focus on what I am reading? Like how do I comprehend what I am reading?

**Math **

a cylindrical block weighs 6 kg. how much will another cube of the same metal weigh if its sides are twice as long?

**math**

Mr.Evans paid &10.60 each for a shipment of 72 shirts. He sold the shirts for $14.20 each.What was his total profit on the shipment?

**math**

235.2 right

**financial management**

What is the value of a share of common stock that paid $2.00 last year, the growth rate is 8%, assume the risk free rate is 4%, the market return is 10% and the Beta is 1.5.

**Math**

What is 4963rounded to the nearest hundred?

**Vectors**

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a * b

**Calculus and Vectors**

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a dot b

**chemistry**

A mixture consisting of 0.150 M N2(g) and 0.612 M H2(g) reacts and then reaches equilibrium according to the equation: N2(g) + 3H2(g) ⇋ 2NH3(g) At equilibrium, the concentration of ammonia is 0.213 M. Calculate the concentration (molarity) of H2(g) at equilibrium to 3 de...

**math**

thank you

**math**

A restaurant offers 12 types of entrees, 6 types of appetizers, and 4 types of rice.How many meals of appetizer, entree, and rice are there?

**Chemistry**

Lithium metal is a highly reactive metal that oxidizes instantly in water or air. Given the data below, calculate the energy required to heat 10.0 g of Li from 150.0 °C to 200.0 °C. Molar heat capacity (solid) = 3.58 J/°C • mol Molar heat capacity (liquid) = 4...

**Chemistry**

Ethanol (C2H5OH) has been produced since antiquity by the fermentation of fruits and vegetables. Given the following data, if 5.87 kJ of energy are transferred to 13.3 g of frozen ethanol at -130.0 °C, what is the final temperature of the sample? Heat capacity (solid) = 0....

**math**

Jane decides to build a wooden pencil box. She allows 32cm along the diagonal. The width of the box is to be 8cm. find the angle that the diagonal makes with the length of the box.

**physics**

Are you not given the magnetic field strength, B?

**Geometry**

A jet is cruising at 360 mph and at an elevation of 34650 feet and on course to pass directly over a golf course. A man on the seventh green sees the jet and quickly calculated the angle of elevation to be five degrees. How long until the jet passes overhead? Nearest seconds T...

**math**

thank you, ms.sue

**math**

2. 3W - 18

**math**

Use the distributive property to simplify the following expressions. 1. 5 ( n + 7 ) 2. 3 ( w - 6 )

**goemetry**

the vertice of rectangle ABCD are A=(0,0), B=(2a,0), C=(2a,2b) and D=(0,2b). Where M,N,P and Q are the midpoint of the consecutive sides of ABCD, what type of quadrilateral is MNPQ?

**Social Studies**

I know right but that is not one o the answers

**Social Studies **

The Oracle of Zeus was located in a.Delphi b.Samos c.Sparta d.Mount Olympus

**Social Studies**

Thank You soo much! You are so Kind! Johnny

**Social Studies**

Which of the following did not influence greek mythology? a. the kingdom of Minos b. knowledge of Egyptian mythology c. Roman culture d. Mycenae culture

**math **

A shipper bought three of the same shirt and paid $63 after the 30% discount. What was the original price of one of the shirts?

**ENG1511**

Everyone have a right to live happily ever after.

**ENG1511**

In 1990 , he lead his team to a glorius victory. Everyone have a right to live happily ever after. I am taking a bus to school every day

**ENG1511**

In 1990 , he lead his team to a glorius victory

**History**

Which of the following examples would be necessary for a country with a mercantilistic economy. The printing and usage of a international currency for all countries The devaluing of a national currency to inflate prices and create an artificial demand for goods The expansion o...

**math**

Find the area of the following circle. r = 9 yd.

**Physics**

The human heart is a mechanical pump. The aorta is a large artery that carries oxygenated blood away from the heart to various organs in the body. For an individual at rest, the blood in the aorta (of radius 1.25 cm) flows at a rate of 5*103 cm3/min (5 liter/min). What is the ...

**Physics**

Which of the following is a direct result of the equation of continuity? a. The pressure one meter below the surface of water is about 10% greater than atmospheric pressure. b. The pressure on the inlet side of a horizontal pipe through which water is flowing at constant speed...

**chemistry**

The rate of helium effusion - search on Youtobe and do it.

**Physics**

What is the force on two point charges of 10-6 C that are 20 cm apart?

**stats**

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm. The average diameter ...

**Calculus**

A 40-foot ladder is leaning against a house when its base starts to slide away. By the time the base is 32 feet from the house the base is moving at a rate of 4ft/sec. a. How fast is the top of the ladder moving down the wall at that moment? b. At what rate is the area of the ...

**Statistics**

Opinion polls find that 13% of Americans "never have time to relax." If you take an SRS of 543 adults, the approximate distribution of the number in your sample who say they never have time to relax will be binomial with parameters: n= p=

**Statistics**

An instant lottery game gives you probability 0.023 of winning on any one play. Plays are independent of each other. If you play 2 times, the probability that you win on one or more of your plays is about? (±0.0001) Thank you!

**economics**

6) If average movie ticket prices rise by about 5 percent and attendance falls by about 2 percent, other things being equal, the elasticity of demand for movie tickets is about: A. 0.0 B. 0.4 C. 0.6 D. 2.5 7) When labor is the variable input, the average product equals the A. ...

**math**

List in order from greatest to least. 3.277 3.274 3.27 I do not know how to put those in order?

**college math **

I'm trying to find why the linear function f(-x)=x√x^2+2 is negative when it should be neither. why are √'s not negatives?!?!?! Is it because √x can't cross over the y axis because √x can't be negative? Then why is it that the x on the o...

**Java**

You are to create an efficient OO application to be used by the wait staff at the Mason Inn. You will process one waiter/waitress at a time. The user will provide information for him or her, to include: their name, number of hours worked and hourly wage. Additional information...

**Physics**

Two ants race across a table 58cm long. One travels at 4.8 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one? Answer in units of cm

**chemistry**

I finally got H2SO3 right. H2SO3 ---> 2H^+ + SO3^-2 is work this way finding the H2S03. Thank you so much for your help. I appreciated your help.

**chemistry**

I found all concentrations of all species except H2SO3. I keep getting wrong. The balanced equation is H2SO3 ---> H^+ + HSO3 Is that correct?

**chemistry**

Calculate the concentrations of all species in a 1.67 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. I know how to find the Na^+ and SO3^-2 but I don't know how to find molarity...

**history- WW1**

What was World War 1 impact and aftermath in the Carribbean ?

**history**

What was World War 1 impact and aftermath in the Carribbean ?

**history**

what was the role of violence in the Mexican Revolution ?

**physics**

sound propagation is directly proportional to the medium it travels. factors contribute to propagation are altitude, humidity,& temperature of the gas, like air. speed of sound is determined by air itself not on amplitude, frequency, or wavelenght.Formula: V (velocity)= meters...

**6th grade science**

the control is what you are matching the blank to. (i.e.) is the blank going to match what the control object is speced out to. if a board is 4 inchs long, that is the control piece. you put other boards up beside to make sure each board is four (4) inches long. hope this helps.

**science**

work = force x distance

**degree**

16. Which article would be the most appropriate source to include in a bibliography for a research paper on stem cells? A. Carroll, Jill and VandeHei, Jim. "Mouse Cells in Stem Lines May Limit Use." Wall Street Journal 24 Aug. 2001: A3. B. Lemonick, Michael D., Davi...

**U.S. History**

F*U*C*K*Y*O*U

**U.S. History**

yes it is indeed correct that the philosophical procreations of my inner mind are very well deformed and plagued with torment. I could only wish so upon those who I feel pitty for in return for their mere being of a waste, a profanity of a human pupile.

**College physics**

A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what angular speed does t...

**Spelling**

Relive how I put in sentence

**GEOMETRY**

Angle C and angle D are vertical angles. Conclusion is that angle C and angle D are complementary. What is a counterexample of the conclusion?

**Chemistry**

Would there be any difference in "beginning percent composition" of an alcohol/H2O soln if the alcohol formed an azeotrope with water vs. if the alcohol DIDN'T form an azeotrope with water?

**Chemistry**

During a fractional distillation of a 25mL ethanol/H2O soln, it was found that first the temperature stayed constant at ~75 C for 3mL of soln, then it went up to 100 C for the rest of the soln. The first question is: Assuming that the unknown (ethanol) did not form an azeotrop...