Saturday

February 13, 2016
Total # Posts: 1,763

**algebra/trignometry**

if angle x is 30 degrees and side yz is 10ft, how long is side xy?
*June 29, 2011*

**Chemistry **

How do you calculate the following: Starting with a liter of 1M sodium acetate (pka of acetic acid = 4.75 ), calculate the number of moles of strong acid or strong base needed to make a pH buffer effective at pH = 4.o ? Thank you!
*June 29, 2011*

**Health Care/Medical Coding**

How are medical coding, physician, and payer feees related to the compliance process?
*June 27, 2011*

**algebra**

Find an equivalent expression with the given denominator 4/n=?/n 2power. The expression that is equivalent to 4/n is
*June 17, 2011*

**8th grade Math**

" four less than twice a number is greater than six " Can someone please write that as an expression ?
*June 10, 2011*

**accounting**

Required a. Determine the gross profit margin for each product produced based on the ABC data [(selling price 2 ABC cost per foot) 3 feet produced]. b. Determine the gross profit margin for each product produced based on the traditional costing data [(selling price 2 ...
*June 3, 2011*

**world history**

In what year did city-states become common in greece
*May 30, 2011*

**math **

state lengthof major and minor foci and center (x^2)/4+(y^2)/25=1 i also need to learn how to graph it,thanks!
*May 26, 2011*

**Chemistry**

You use the equation Q=CmT Q=(specific heat)(mass)(change in temperature)
*May 26, 2011*

**math**

log(4x+10)=3 simplify?
*May 26, 2011*

**math**

The area of a circular trampoline is 112.07 square feet. What is the radius of the trampoline? Round to the nearest hundredth
*May 26, 2011*

**Physics**

A pen placed 13.0 cm from a concave spherical mirror produces a real image 13.5 cm from the mirror. a) What is the focal length of the mirror? Answer in units of cm. b) Calculate the magnification of the image. Assume the pen is placed 28.9 cm from the mirror. c) What is the ...
*May 23, 2011*

**accounting**

cash flow analysis of whirlpool cash flow statement for 2006 solution
*May 20, 2011*

**science**

whats the reactant of 2,4-D with ethanol
*May 18, 2011*

**Government**

yeah but because you say that strict constructionsts wanted to limit power so liberal consrtuctionists wanted to expand power?...
*May 17, 2011*

**Government**

so liberal constructionists wanted to expand national power.?
*May 17, 2011*

**Government**

what is the strict constructionists attitude toward national power
*May 17, 2011*

**math**

8.94427191
*May 17, 2011*

**science**

monarch butterflies migrate from newyork at a certain time of the year. how migration helps butterflies survive?
*May 17, 2011*

**com/156**

When developing your arguments for your final essay, how might you determine what is fact and what is opinion? Does the opinion of an expert in the field carry more weight than the opinion of someone that is not? Explain why or why not. Find one factual article online about ...
*May 14, 2011*

**History**

Hi I'm evaluationg sources and I need help finding out more informatoin on Z.A.B Zeman. IN the book, he said something about being a marxist/socialist/communist but i'm not sure what and its kinda urgent that I find out... I've been working real hard.
*May 14, 2011*

**abou the internet**

All webpages are original! Unless they are copying someone elses stuff. You are asking about bias and how severly it clouds the information. Youd look at stuff like does the information match up to other information, affilations of the author, how moderate or extreme the views...
*May 14, 2011*

**abou the internet**

Oh, right. Everyone has their own opinions or bias, its the ability to put their own opinions and feelings aside and do a good evaluation that matters. You'd look the author and at the authors perspective.
*May 14, 2011*

**about the internet**

Hi are you evaluating a webpage at the moment or are you answering a homework question?
*May 14, 2011*

**Physics**

A man jogs along at 1.2 m/s. His dog, playing 36 m behind him, waits for 5 s, then takes off after him at 3.1 m/s. How far apart are they when the dog starts after his master? Answer in units of m. How far will the dog run? Answer in units of m.
*May 13, 2011*

**Spanish**

1.bebes 2.hago 3.tiene 4.envia compartir
*May 11, 2011*

**poetry**

what is the meter in the poem "Me"by Walter de la Mare?
*May 11, 2011*

**MATH**

A rope 105 meters long must be cut into pieces that are 2 1/2 meters long. How many pieces of rope are there
*May 9, 2011*

**Earth science **

Which single factor generally has the greates effect on the climate of an area on the earth's surface?
*May 9, 2011*

**Physic**

A flywheel rotates with an angular speed of 26 rev/s. As it is brought to rest with a constant acceleration, it turns 55 rev. What is the magnitude of the angular acceleration? How much time does it take to stop?
*May 8, 2011*

**Physic**

A 3.8 kg object is supported by an aluminum wire of length 1.9 m and diameter 2.2 mm. How much will the wire stretch?
*May 8, 2011*

**Physics**

A 669 g sample of water at 83 degrees celsius is mixed with 486 g of water at 23 degrees celsius. What is the final temperature of the mixture? Assume no heat loss to the surroundings.
*May 8, 2011*

**science**

What is the relationship between DNA, chromosomes, alleles and genes?
*May 5, 2011*

**Science (Force and motion)**

Explain how acceleration can be slowing down. Calculate the impact force of a 50 kg object travelling at 100km/hr. (Momentum = mass x velocity) Calculate the momentum of a tennis ball of 50 g moving at a velocity of 25m/s.
*May 3, 2011*

**WORD PROBLEMS WITH EQUATIONS**

Mark has 28 10-cent and 20-cent pieces. How many of each coin does he have if their total value is $4.30? In a class of 26 students, there are four more than girls. How many boys are there?
*May 1, 2011*

**Physics**

I got the answer wrong. Is there any other ways you can explain this?
*April 28, 2011*

**Physics**

A 37 ohm lamp and a 59 ohm lamp are connected in series and placed across a potential of 43 V. What is the equivalent resistance of the circuit? Answer in units of ohm. What is the current in the circuit? Answer in units of A. What is the voltage drop across the first lamp? ...
*April 28, 2011*

**PHysics**

A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Which statement is true? 1. The dragster rounded the curve at a changing velocity of 100 km/h. 2. The dragster moved along a straight line at a constant velocity of 100 km...
*April 28, 2011*

**blair**

Sitting motionless on a playground swing. The downward force is 500 n. How much force is there on each of the two swing chainsv
*April 27, 2011*

**Business **

How about these ones? This modifiers are really confusing. Do you know of any website that will make them easy to understand? 1)Rudolph enjoys eating curries from the Indian delicatessen with a lot of spices. 2) On the phone, the telemarketer persuaded the new homeowners to ...
*April 27, 2011*

**Business **

Identify which of the following sentences uses modifiers correctly; a) kurt and his hockey teammates nearly cooked two hundred pancakes for the breakfast fundraising event. d) Bridget decided to leave her career as an attorney and pursue acting during the meditation retreat.
*April 27, 2011*

**physics**

1.using equations What would happen if the knob were placed in the center of the door? What would happen if the knob were placed right next to the hinges?
*April 26, 2011*

**physics**

1.What if Newton’s Third Law did not exist?. In your response to this inquiry, think of some of the consequences if Newton’s Third Law were not true. Describe in detail at least two consequences that would result if the Third Law were not true.
*April 26, 2011*

**math**

How many pieces of ribbon 1 4/5 yd long can be cut a length of ribbon 9 yd long?
*April 25, 2011*

**statistics**

At a neighboring university, the average salary is also $45,000 and the distribution is normal. If $47,000 has a z score of 1.5, what is the standard deviation?
*April 24, 2011*

**statistics**

calculate the 95% confidence interval for u given X=100, s=25, and N=101
*April 24, 2011*

**research methods**

a bag of 100 marbles contains 0 blue, 25 green, 25 mixed,and 20 clear. what is the probality of selecting a blue? ablue and green? a marble that is not clear? ablue on the first draw and a clearon the second draw?
*April 24, 2011*

**physics**

A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of m/s.
*April 19, 2011*

**physics**

A thin 2.82 m long copper rod in a uniform magnetic field has a mass of 44.2 g. When the rod carries a current of 0.238 A, it floats in the magnetic field. The acceleration of gravity is 9.81 m/s2 . What is the field strength of the magnetic field? Answer in units of T.
*April 19, 2011*

**physics**

A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of m/s.
*April 19, 2011*

**Spanish**

1. les gusta 2.le gusta 3.le gusta 4.me gusta 5.nos gusta 6.te gusta
*April 18, 2011*

**Spanish**

1. me gusta 2.le gusta 3.nos gusta 4.le gustan 5.te gusta
*April 18, 2011*

**cómo comenzar a aprender inglÃ©s?**

Necesito aprender inglés y no sé por donde comenzr, por favor, ayuda.
*April 18, 2011*

**Chemistry**

The second part of this question does not make sense cell potential has to be in V not M...M is for concentration
*April 17, 2011*

**trig**

115.4
*April 16, 2011*

**algebra**

6x + 2y = -2 4x + y = 1
*April 13, 2011*

**chemistry-URGENT**

Hydrazine is used as a rocket fuel. When 1.50 g of hydrazine, N2H4, was burned in a bomb calorimeter, temperature increased from 23.57 °C to 28.84 °C. The heat capacity of the calorimeter was 5.510 kJ/°C. Determine the enthalpy of combustion of octane.
*April 10, 2011*

**chemistry**

Determine the heat of combustion of acetylene (C2H2).
*April 10, 2011*

**Chem**

The total pressure in an 11.1L automobile tire is 40psi at 13 degree celcius. By how much does the pressure in the tire rise if it warms to a temperature of 56 degrees celcius and the volume remains at 11.1L ?
*April 10, 2011*

**Spanish**

the first one is B. The second one is D the third one is C
*April 9, 2011*

**physics**

In the parallel circuit, if the current put out by the battery is 3 A and the current through R1 is 1 A, what is the current through R2?
*April 8, 2011*

**physics**

thanks,(:
*April 8, 2011*

**physics**

A 70 ohm resistor is connected to a 6.7 V battery in the circuit below.When the switch is closed, calculate the current I. Answer in units of A.
*April 8, 2011*

**chemistry **

write a balanced chemicl equation for the reversible reaction of carbon monoxide and chlorine gases to form carbonyl choride gas, COCl2.
*April 7, 2011*

**math**

solve for 5x+3y=2 and 6x+4y=7
*April 3, 2011*

**MATH**

A light year is the distance that a light travels through a vacuum (space without matter) in one year. A light year is about 9.46 x 10^12km. The distance to the spiral galaxy NGC 4603 is about 1.08 x 10^8 light years. What is the distance in km?
*March 31, 2011*

**science**

ok thanks!
*March 31, 2011*

**science**

please be specific. does it increase or decrease molarity of NaOH? or does the molarity stay the same???
*March 31, 2011*

**science**

a burette had 10ml of water in it before it was filled with NaOH. would this increase, decrease, or not affect the molarity of NaOH in the burette? Explain!
*March 31, 2011*

**Government**

true but what would be different about the legal sysyem itself?
*March 29, 2011*

**Government**

If a person had to prove his or her innocence instead of the government how would our legal system differ?
*March 29, 2011*

**physics**

A 18.7 ohm and a 24.3 ohm resistor are connected parallel. A difference in potential of 41.5 V is applied to the combination. What is the equivalent resistance of the parallel circuit? Answer in units of ohm .
*March 29, 2011*

**physics**

The load across a 12 V battery consists of a series combination of three resistors 21 ohm, 22 ohm, and 56 ohm. What is the total resistance of the load? Answer in units of .
*March 29, 2011*

**math**

In 1000 samples, assuming that the null hypothesis is true, how many times would you expect to commit Type I error if alpha=.05?
*March 28, 2011*

**Math**

Find x, the angle of depression (measured in degrees) from the top of a lighthouse that is 173 ft above water level to the waterline of a ship 4835 ft off shore. Round your answer to the nearest hundredth of a degree.
*March 28, 2011*

**physics**

The load across a 12 V battery consists of a series combination of three resistors 21 ohm, 22 ohm, and 56 ohm. What is the total resistance of the load?
*March 28, 2011*

**Physics**

A spring has a spring constant, k, of 441 N/m. How much must this spring be stretched to store 22 J of potential energy?
*March 28, 2011*

**science**

what does an experiment prove /or disprove?
*March 26, 2011*

**math**

find g(1)+g(2)+g(3)+...+g(50) given that g(x)=13-5x
*March 25, 2011*

**Calculus please help**

y=100 find the first and second derivative
*March 25, 2011*

**math**

Two cards are chosen from a standard deck of 52 playing cards without replacement. What is the probability both cards will be an Ace
*March 24, 2011*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.
*March 22, 2011*

**physics**

A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?
*March 22, 2011*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.
*March 22, 2011*

**Algebra I **

7x-y+5
*March 21, 2011*

**physics**

A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?
*March 20, 2011*

**physics**

A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? Answer in units of s. b) How far has the car moved during the braking period? Answer in units of m.
*March 20, 2011*

**physics**

A dog sits 3.0 m from the center of a merry- go-round. a) If the dog undergoes a 1.2 m/s2 cen- tripetal acceleration, what is the dog’s linear speed? Answer in units of m/s. b)What is the angular speed of the merry-go- round? Answer in units of rad/s.
*March 20, 2011*

**physics**

A staging that weighs Wstaging supports a painter weighing 560 N. The reading on the left scale is 610 N and the reading on the right scale is 460 N. What is the weight of the staging? Answer in units of N.
*March 20, 2011*

**physics**

A harmonic wave is traveling along a rope. The oscillator that generates the wave com- pletes 44.0 vibrations in 26.9 s. A given crest of the wave travels 359 cm along the rope in a time period of 11.6 s. What is the wavelength? Answer in units of m.
*March 20, 2011*

**physics**

A negatively charged balloon has 4.6 μC of charge. How many excess electrons are on this bal- loon? Answer in units of electrons.
*March 20, 2011*

**Chemistry**

well they are supposed to be used for an NaOH titration. but if that doesnt help, than in general why should they be dissolved?
*March 18, 2011*

**Chemistry**

Why should the sodium hydroxide pellets be completely dissolved in the preparation of the NaOH solution? please explain thouroughly, thanksss in advance!!
*March 18, 2011*

**physics**

Two electrostatic point charges of +50.0 μC and +50.0 μC exert a repulsive force on each other of 197 N. What is the distance between the two charges? The Coulomb constant is 8.98755 × 109 N · m2/C2. Answer in units of m.
*March 16, 2011*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.82 m/s2. What is the magnitude of the car’s displace- ment as it accelerates uniformly from a speed of 85 km/h to one of 95 km/h? Answer in units of m.
*March 15, 2011*

**chemistry ASAP please!!**

The reaction of CO(g) + NO(g) is second-order in NO2 and zero-order in CO at temperatures less than 500K. (a) Write the rate law for the reaction. (b) How will the reaction rate change if the NO2 concentration is halved? (c) How will the reaction rate change is the ...
*March 15, 2011*

**Chemistry**

Ten kilograms of hydrogen gas are mixed with 355 kg of chlorine in a 0.50 mm^3 drum. The two gases react to produce hydrogen chloride. What is the final pressure in the drum if the final temperature is 60 degrees celcius?
*March 13, 2011*

**Physics**

A negatively charged balloon has 3.1 μC of charge. How many excess electrons are on this bal- loon? Answer in units of electrons.
*March 7, 2011*

**Physics**

A negatively charged balloon has 3.1 μC of charge. How many excess electrons are on this bal- loon? Answer in units of electrons.
*March 7, 2011*

**Physics**

Calculate the net charge on a substance con- sisting of a combination of 1.9 × 10^13 protons and 3.9 × 10^13 electrons. Answer in units of C.
*March 7, 2011*