Thursday
October 30, 2014

Search: Calculus - not sure if my work is correct?

Number of results: 56,669

Physics
7.7mol of helium are in a 16L cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom? Part A: so this is what i did T=PV/nR and C=T-273 P=65psi=4.481592e^5Pa V=16L=.016m^3...
November 19, 2009 by ana

Physics
A boy pushes his friend across a skating rink. Since the frictional forces are very small, the force exerted by the boy on his friend's back is the only significant forece acting on the friend in the horizontal direction. Is the change in kinetic energy of the friend greater ...
November 14, 2010 by Taylor

stat
Assume that the population of heights of female college students is approximately normally distributed with mean m of 67.26 inches and standard deviation s of 5.96 inches. A random sample of 78 heights is obtained. Show all work. (A) Find (B) Find the mean and standard error ...
December 10, 2011 by tina

earth
A satellite 200 miles above the earth is orbiting the earth once every 6 hours. How long, in hours, does it take the satellite to travel 8,400 miles? (Assume the radius of the earth is 4,000 miles.) Give your answer both as an exact value and an approximation to three ...
February 20, 2012 by Anonymous

Calculus
Carla Music Company estimates that the marginal cost of manufacturing its professional series guitar is C (x) = .002x + 100 dollars/month when the level of production is x guitars/month. The fixed costs by Carla are $4000 per month. A. Find the total monthly cost incurred by ...
November 30, 2008 by Mel <3

statistics
To see whether people are keeping their car tires inflated to the correct level of 35 pounds per square inch (psi), a tire company manager selects a sample of 36 tires and checks the pressure. The mean of the sample is 33.5 psi, and the population standard deviation is 3 psi. ...
October 7, 2013 by Anonymous

math
in order for piece of rectangular luggage to fit in the overhead compartment of a certain airplane, the sum of the height of the luggage and the perimeter of the base of the luggage must be less than or equal to 110 inches. If a piece of luggage has a height of 20 inches and a...
July 29, 2009 by Julia Ten

English-A Raisin in the Sun
What does Beneatha think about George Murchison in the book A Raisin in the Sun? Please check my answer: Is this correct: Beneatha prefers Asagai over George. She doesn't like some of the things George says. She argues with him since she doesn't always agree with him. The two ...
September 1, 2007 by Anonymous

SPANISH one more ??
in the following sentence I am to cirle the indirect object pronouns and draw an arrow to the direct object they stand for. A mi me gusta ir de compras. Es muy divertido comprar regalos para mi famililia y mis amigos. MY ANSWSER is this correct. ** cirled me arrow to a mi ** ...
September 27, 2007 by liz

Intro to probability
An octave contains twelve different musical notes (in Western music). How many different eight note melodies can be constructed from these twelve notes if: (a) no note can be used more than once? (b) any note can be used as often as you please...
February 17, 2008 by Amelie

Global
How did geography affect both Napoleon's invasion and Hitler's invasion of Russia? a) warm-water ports prevented the flow of supplies b) the climate created obstacles to success c) the tundra enabled the movement of troops d) deserts made invasion possible Is the correct ...
March 31, 2009 by Anonymous

Chemistry
Gas particles travel at speeds of up to 500 m/s. Why, then, does it take so long for gas molecules to travel the length of a room? My answer would be that the molecules still have a weak attraction to each other and, in addition, the friction of the molecules surrounding the ...
November 6, 2009 by Mary

Gilgamesh
How Does Gilgamesh respond to the death of Enkidu? a) He flees the city of Uruk to seek immortality b) He builds up the city of Uruk with monuments and massive walls to honor Enkidu c) He blames the harlot lass for brining this pain and suffering on Enkidu d) He attempts to ...
December 5, 2010 by Johnathan

English
1. None of the guests (has, have) left. 2. Each of these apples (is, are) ripe. 3.One of my favorite songwriters (is, are) Billy Joel. 4.Some of my cousins (has, have) come to my party. 5.All of the bread (was, were) eaten. Tell if the indefinite pronoun is singular or plural ...
December 8, 2010 by Chris

English
Hello. Please help me with a few questions. 1)Is it possible to use "authority" in the context "he was removed from authority" (ie 'from power')? 2)is it possible to say "he was deposed from power/authority"? 3)Which is the correct word order, "his two sisters" or "two his ...
May 15, 2011 by Ilma

Literacy
Miss Sue please review Literacy question #2, on Aug 23, 2011 @ 6:04pm. I believed I made a mistake, the correct answer is C not B. 2. The Altas of World Religion is an example of which of the following reference sources? A. Historical atlas B. Subject-specific atlas C. General...
August 24, 2011 by Jen

algebra
Company makes tire rims. Estimates the the profit, P, of selling x tire rims is given by: P= -0.01x^2 + 8x + 1500 Plugging in 1000 for P and solving, I get 400. Is that correct? b) find the number of rims that must be sold to maximize profit. plugging in 400 for x, I get $3100...
October 11, 2011 by Nabil

Chemistry
1. Nitric oxide reacts with bromine gas at elevated temperatures according to the equation, 2 NO(g) + Br2(g) = 2 NOBr(g) The experimental rate law is rate = k[NO][Br2]. In a certain reaction mixture the rate of formation of NOBr(g) was found to be 4.50 x 10-4 mol L-l s-l. What...
February 19, 2012 by Hannah

Math - check answer
A rifle bullet is fired directly upward from the ground. Its height above the ground at any instant of time t is given by the formula, s = 63t - 9.8t2. Assuming there is no air resistance how high will the bullet rise? height in meters = My Answer S'= 63-19t s"=0-19.6 Height ...
January 29, 2013 by Brownie

Math
Fantasia Florist Shop purchases an order of imported roses with a list price of $2,375 less trade discounts of 15/20/20. What is the dollar amount of the trade discount? Answer: 1306.25 4. Using your answer to the question above, what is the net dollar amount of that rose ...
May 20, 2013 by Ann

math
during a clinical study, a medical company found 3 out of 70 people experienced a side effect when using a certain medicine. The company predicts 63,000 people will use the medicine next year. How many people are expected to experience a side effect? 3/70=x/63000 18900=70x x=...
December 17, 2013 by elle

math
the vertices are at (2,1) and (2,7) and focus is at (2,*) write the equation of the hyperbola that meets each set of conditions. Is the asterisk supposed to be an 8? It has to be some number. I will set this up for you later of you respond. The fomulas you need are in most ...
January 4, 2007 by becky

calculus
Consider ∞ ∑ [(3k+5)/(k-2k)]ᵖ, for each p ∈ ℝ. k=3 Show this series { converges if p > 1 { diverges if p ≤ 1 Hint: Determine the known series whose terms past the second give an approximate match for the terms of this series. This series...
August 6, 2011 by Bernie

Chemistry Lab
We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 & 2 are consistent ...
January 20, 2009 by Shaniquaa

U.S.History
i have to analyze a political cartoon. it appeared during the American Revolution by Benjamin Franklin. it shows a snake broken into many parts. each part has a initial of a state like., NY, NC, P, NE, V, M.etc on the bottom it says JOIN or DIE. i have to 1. what do teh ...
January 25, 2009 by y912f

Symbolic Logic
I have to put the following arguments in standard form and wasn't sure if I was doing this correctly... 1. John didn't come home smiling, since if John got the job he came home smiling. But he didn't get the job. so I wrote: If John got the job, then he came home smiling but ...
November 3, 2009 by Emma

English
Can someone check these two paragraphs, please? It is really important to me. 1)In Chapter ten Dr Jekyll comes to the realization of the primitive duality of man. He admits that man is not truly one but two. He is sure that if he can separate his two identities, he will be ...
March 19, 2012 by Matthew

math
The high temperature in a city one day was 2,6 degrees Celsius. The low temperature was -2.8 degrees celsius. What was the temperature range in the city that day? show your work.
March 6, 2013 by syram

Pre-Calculus
A rectangular garden with an area of 250 square meters is to be located next to a building and fenced on three sides, with the building acting as a fence on the fourth side. Let x be the length of the side parallel to the building. 1. Find T(x), the total amount of the fence ...
January 18, 2008 by Courtney

algebra(check)
I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9 c.an=6n-9 d.an=n-3 ...
August 24, 2007 by Marissa

physics
An elevator with a wieght of 27.8 kN is given an upward acceleration of 1.22 m/s^2 by a cable. a) what is the tension in the cable. b) what is the tension when the elevator is declerating at the rate of 1.22m/s^2 but is still moving upwards? what exactly is a kN? to find the ...
November 13, 2006 by Chris

Chem.
Why is it not possible to achieve a complete separation of the ethanol from the water in the clarified reaction mixture via simple distillation? I'm not sure about this because I thought the difference between fractional (what was done) and simple distillation is that ...
December 8, 2009 by Chelsea

Social
Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental health issue-make ...
January 20, 2014 by Anonymous

Social
Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental health issue-make ...
January 20, 2014 by Anonymous

Social
Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental health issue-make ...
January 21, 2014 by Anonymous

calculus
A child is flying a kite. If the kite is 125 feet above the child's hand level and the wind is blowing it on a horizontal course at 7 feet per second, the child is letting out cord at _____ feet per second when 245 feet of cord are out. Assume that the cord remains straight ...
October 25, 2011 by Katie

physics
a child on a beach kicks a beach ball, giving it an initial velocity of 4.0m/s.It was sitting on the ground when given the kick. The ball lands on the beach 5.0 m away with a speed of 2.2 m/s just before it hits. the final landing place is at the same level as the place where ...
November 7, 2011 by bec

calculus
Find a function f(x) = a + b sqrt(x) that is tangent to the line 2y - 3x = 5 at the point (1,4) AND Find a function of the form f(x)=c+dcoskx that is tangent to the line y=1 at the point (0,1) and tangent to the line y=x+(3/2) - (pi/4) at the point ([pi/4], [3/2)
February 9, 2010 by Kristen

Economics/social studies
This isn't an example of an invisible hand is it? A single drug company obtains a patent on a lifesaving drug. The company can charge whatever it chooses for the drug and will not lose customers. Is the invisible hand at work in this scenario? I say no because the customers ...
March 17, 2009 by Camilla

Cover letter Help
Okay, so I'm trying to get a job at this grocery store. And I have some questions which I don't get how to answer. Here is an example of a cover letter I was given. (I'll post the first paragraph) Dear Manager, I am applying for the position as a salesperson at Petland. I ...
March 26, 2011 by Sydney

science
Can you direct me to a site(s) which can help with college chemistry and statistics? Here are a couple of good chemistry sites that pretty well cover the waterfront. I don't know any stat sites but if you will repost with the subject line of "math" I'm sure someone will help ...
February 19, 2007 by jules

Grammar/Morphemes
In the word ecologists, is eco the root morpheme or ology? Are the morphemes eco, log, y, ist, s or ec, ology, ist, s ? This is very confusing for me. Any explanation on how to find the root would be appreciated. It's easy to find roots on some words, but words like ecology, ...
March 19, 2012 by Nicki

College Algebra (Word Problem)
A rectangular eld is to be fenced o along the bank of a river; no fence is required along the bank of the river. The material for the fence costs 8 dollars per running foot for the two ends and 16 dollars per running foot for the side parallel to the river. If the area of the...
October 19, 2014 by Mathew

EARTH SCIENCE
You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located within 300 miles of the ...
July 13, 2010 by Anonymous

EARTH SCIENCE
You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located within 300 miles of the ...
November 19, 2012 by alice

biology
Generally,mankind( I believe across all cultures) prefers to eat foods that are served hot or sometimes chilled.I have the impression that it should be more natural,beneficial and tastier to eat food as it is i.e. at room temperature, as what other animals do. Our body ...
December 14, 2013 by syahirah

MATH HELP PLEASE
Bill has 30 coins, some nickels some dimes. They equal $2.10. How many nickels are there? What is the equasion used to solve this problem? When I solve it, I get 4.3 nickels, but how can there be .3? Please help me solve I posted the two equations for this about an hour ago. ...
December 17, 2006 by mary

math retry 2
8^x = 16^x+2, x+2 -2=0 8^x =16^x+2, 2 x 8 = 16 log sub 5 (2x+3)=2 2(7/2)+3=2 log sub 5 (2x+3)=2 log sub 5 =11 The first and second lines make no sense whatsoever. The last is even more confusing. Watch 8^x = 16^(x+2) 8^x = 8^2(x+2) x= 2x+4 solve for x. On the next log5 (2x+3)=...
January 13, 2007 by Sara L.

physics(check my work)
A 60.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air resistance and his center of mass rises by a maximum of 14.9 cm. Model the floor as completely solid and motionless. a)With what momentum does the ...
April 3, 2010 by phys

Chemistry
Consider the following reaction: 4NH3 + 7O2 (arrow) 4NO2 + 6H2O. A) How many moles of NH3 react with 5.64 mol of O2? B)How many moles of NO2 are obtained from 3.27 mol of O2? C) How many moles H2O will be produced from 8.95 g of NH3? D)How many grams of NH3 will be needed to ...
June 30, 2014 by Apryl

social studies(history)
i m doing a report on the star spangled banner. i researched dat the star spangled banner has 15 stars and stripes, but i m sure the there are 13 stars and 13 stripes. Can somebody plz check for me. http://en.wikipedia.org/wiki/Us_flag =) The Star Spangled Banner is unique ...
May 25, 2007 by shivangi

Intro to Probability
In a certain election, the incumbent Republican will run against the Democratic nominee. There are three Democratic candidates, D1, D2 and D3, whose chances of gaining the Democratic nomination are .50, .35 and .15, respectively. Here are the chances that the Republican will ...
February 17, 2008 by Amelie

physics EM
WOW this problem is making me mad. I know force between two wires is mu*I1*I2*L/2pi*d. Ive used this and tried to find the magnitude but it says its wrong. What Am i doing wrong? I made sure to subtract the two forces one going up and one going down. There are 3 wires all ...
March 31, 2008 by Spencer

4 CALCULUS study problem
1. How fast does the radius of a spherical soap bubble change when you blow air into it at the rate of 15 cubic centimeters per second? Our known rate is dV/dt, the change in volume with respect to time, which is 15 cubic centimeters per second. The rate we want to find is dr/...
January 9, 2014 by Samantha

chemistry check my work
the equilibrium-constant expression for a reaction is kc= [N2][H2O]2 ---------- [NO]2[H2] what is the equilibrium-constant expression when the equation for this reaction is halved and then reversed? 2NO + 2H2 --> N2 + 2H2O NO + H2 ---> N + H2O N + H2O --> NO + H [NO][...
April 14, 2010 by Anna

Science-English
What would happen if the temperature of the Tundra increased? The permafrost will melt and since the tundra is flat land bogs and shallow lakes will appear and won't drain. Rainfall will change, although I'm not sure if it will increase or decrease. Plants will also change, ...
April 6, 2009 by Sam

physics help
Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00m from speaker A directly to your right and 3.50m from speaker ...
April 19, 2010 by Anonymous

Physics
A mass m = 13 kg is connected to two different springs, one on the left and another on the right. It is displaced a distance x to the right from its equilibrium position. (Take k1 = 115 N/m and k2 = 198 N/m.) (a) What is the net force acting on the mass? (Use any variable or ...
July 13, 2012 by Bruce

math,correction plz
can someone correct my math...thanks... Perform the indicated multiplication. Then simplify each radical expression. Problem#4 radical(13) times radical (5) My answer: radical (15) Problem #28 radical (7) (2radical(3)+3radical(7)) MY answer: 2radical(21) + 21 No on first one. ...
March 10, 2007 by jas20

grammar
In the following sentence select the compound predicate. We could study coins, see jewels, or examine tools. A. study,see B. could study, examine C could study,see, examine D study, see, examine Which of these is the correct answer. I think its D. I am not real good with these...
October 9, 2009 by Anonymous

Astronomy
Only one side of the moon is visible from Earth because... A. the moon does not rotate on its axis. B. the moon does not revolve around Earth. C. the moon rotates faster than it revolves. D. the moon revolves once and rotates once in the same period of time. I chose D. Is that...
May 12, 2011 by James

Physics
An object is observed for a 5 second interval. During this time, the objects velocity increases from 2 m/s to a final velocity and the object travels 75 m. The acceleration of the object is constant. Given this information, which of the following statements is not correct? a)...
October 7, 2012 by Lewis

calculus
Imagine making a tent in the shape of a right prism whose cross-section is an equilateral triangle (the door is on one of the triangular ends). Assume we want the volume to be 2.2 m3, to sleep two or three people. The floor of the tent is cheaper material than the rest: assume...
December 10, 2013 by Danny

algebra
List the like terms in the following group of terms. 7u, 4tu2, 4t2u, 5tu2, 7tu2, 6t2 did I do this correct? (4tu + 7tu + -5tu) + 4tu +6t +-7u It should be... 6t^2 + 4t^2u + 7tu^2 - 7u how come you don't use the 4tu^2 oh i am sorry...it should be 6tu^2 instead of 7tu^2 ...
May 31, 2007 by did I do this correct/

English expression
1. He is of medium height. 2. He is of average weight. 3. He has medium height. 4. He has average weight. 5. He has long curved hair. 6. She has short straight blond hair. 7. She has medium-length wavy blonde hair ----------------------------------- Are all the sentences ...
March 23, 2008 by John

PSYCHOLOGY
major schools of thought in psychology My answer to this is please tell me if I am correct or not behaviorism social cultural Psychoanalytical cognitive Am I on the right path please help I have to write a paper It says to identify the major schools of thought in psychology ...
June 4, 2008 by tom

Functions
The function y = x becomes y= -2(3x+2)-5. Describe the order in which the transformations would take place. 1. The function is stretched vertically by a factor of 2 2. The function is compressed horizontally by a factor of 1/3 3. The graph is reflected into the x-axis 4. The ...
April 10, 2009 by Lena

math
A 16-ft ladder is sliding down a wall as shown in the figures below. The variable h is the height of the ladder's top at time t, and x is the distance from the wall to the ladder's bottom. Suppose that the top is sliding down the wall at a rate 5 ft/s. Calculate dx/dt when h...
June 29, 2010 by Jacob

health
In the field of health care administration, why is it important that everyone within the facility use medical terminology correctly? How can using correct medical terminology improve patient outcomes and services within the facility? What could be some potential problems if ...
April 17, 2012 by Taylor mcBride

7th grade math Ms. Sue please last questions
2. 6x + 29 = 5 (1 point) 4 18 204 144 7. 4(y 4) = 8 (1 point) 2 2 4 6 9. Raymond buys bottles of water at $2.10 each and a large pizza at $12.99. The total cost was $21.39. How many bottles of water b did he buy? (1 point) 2.10b + 12.99 = 21.39; 4 bottles 2.10 + 12.99b...
December 11, 2012 by Delilah

calculus problem
the thin lens equation in physics is 1/s+1/S=1/f where s is the object distance from the lens,S is the image distance from the lens,and f is the focal length of the lens.Suppose that a certain lens has a focal length of 6cm and that an object is moving toward the lens at the ...
October 27, 2010 by roslin

english
I need to write a one page report - not a complete story. It must be man vs man, as well as man vs self or man vs nature. not sure if i understand can someone explain What you are describing are different types of conflicts in literary (not psychological) situations. I hope ...
September 23, 2006 by kirs

AP English 11
I have to write a paper for english, i keep getting bad grades and i use the paper rater sight always to make sure i do my best. it shows i get a 95 and my teacher gives me 30-20 points less and i dont under stand what im doing wrong. i need help on my next paper which is ...
February 17, 2013 by Stephanie

AP English 11
I have to write a paper for english, i keep getting bad grades and i use the paper rater sight always to make sure i do my best. it shows i get a 95 and my teacher gives me 30-20 points less and i dont under stand what im doing wrong. i need help on my next paper which is ...
February 18, 2013 by Stephanie

physics
A spoked wheel with a radius of 44.0 cm and a mass of 1.90 kg is mounted horizontally on frictionless bearings. JiaJun puts his 0.550-kg guinea pig on the outer edge of the wheel. The guinea pig begins to run along the edge of the wheel with a speed of 18.0 cm/s with respect ...
March 29, 2012 by Riya

Psychology
As a scientist, Carl is concerned with the intensity of lights in the modern human environment. In his research project, Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in total...
November 7, 2011 by Kasey

English 150
I have a one page essay due tomorrow morning. I need someone to proof read this for me if you dont mind. I am looking to make sure i have everything in MLA format, correct grammer, etc and it sounds right. Any help would be so appreciated! Here goes.... The questions im ...
December 1, 2009 by amy

Cultural Diversity
I am working on an autobiographical research paper that analyzes the influences of race as it relates to your community. Can someone please answer a few of the following questions to help me with different openions on the subject? Thank you! Do members of your community look ...
December 30, 2006 by Russell

Physics
A person is riding on a Ferris wheel. When the wheel makes one complete turn, is the net work done by the gravitational force positive, negative, or zero? Justify your answer. What to you think? After one complete turn the elevation remains unchanged. Elevation determines ...
March 20, 2007 by Mary

Physics
A beam of unknown charged particles passes at right angles to the direction of magnetic field of 9.0x10^-2 T. If the speed of the particles is 3.0 x10^4m/s and the force experienced is 8.64x10^-16N, how many electric charges are carried by one particle? my Work: F = qvB q = F/...
April 22, 2009 by sophie

math prob.
the purchasing director of a bank has just received a shipment of 100 printers. She has been told that the shipment includes 5 defective printers. She randomly selects two printers and tests them. If both printers work the purchasing director accepts the shipment. what is the ...
July 25, 2010 by sha

Economics
A vice president of a company argues that the president of the company should raise workers wages if the president wants less absenteeism. The president says that wages probably should be cut so that the workers could not afford to miss so much work. Evaluate the two views ...
July 28, 2010 by Sophia Anderson

physics
When you increase the number of turns in a coil to induce more voltage, you do which of the following?. A) only get more voltage if the resistance of the larger coil remains unchanged.B) None of the above.C) do more work to induce the greater voltage.D) really do get "...
April 15, 2012 by Phillip

physics
When you increase the number of turns in a coil to induce more voltage, you do which of the following?. A) only get more voltage if the resistance of the larger coil remains unchanged.B) None of the above.C) do more work to induce the greater voltage.D) really do get "...
April 17, 2012 by Phillip

math
A polling company took 5 polls in the week before and election. It showed that a mayoral candidate would get 66%, 56%, 55%, 60%, and 63% of the votes. That candidate recieved 64% of the total votes during the actual election. Find the percent error in the average of the ...
March 20, 2013 by syram

Chemistry II
Consider the following balanced chemical equation: 3(NH4)2CrO4 + 4Al + 24HCl --> 3CrCl2 + 6NH4Cl + 4AlCl3 + 12H2O. a) How many moles of HCl would be required for the reaction of 0.0123 moles Al? b) How many grams Al would be required for the reaction of 2.00g (NH4)2CrO4? ...
August 26, 2013 by Rachel

Physics
A team of dogs drags a 151 kg sled 0.863 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.223.The acceleration of gravity is 9.8 m/s^2. 1. Find the work done by the dogs. Answer in units of kJ. 2. Find the energy ...
March 15, 2014 by Emeera

Astronomy
Light travels at a constant speed of 3.0 x 105km/s. The distance between the Sun and the Earth is about 1.5 x 108km. Use the distance = speed x time formula (d = v t) to calculate the time it takes light to travel from the Sun to the Earth. Show your work. Express your result ...
March 15, 2014 by Lilly

Astronomy
Light travels at a constant speed of 3.0 x 105km/s. The distance between the Sun and the Earth is about 1.5 x 108km. Use the distance = speed x time formula (d = v t) to calculate the time it takes light to travel from the Sun to the Earth. Show your work. Express your result ...
March 15, 2014 by Lilly

physics
a 60kg woman is a passenger in a car that is involved in a crash. she is wearing a seat belt that stops her in 0.1s. if the car gad been travelling at 12m/s before the crash calculate the deceleration and the force on her breastbone due to the seat belt? can you assume that v=...
September 18, 2014 by mocha

Statistics
A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19. Show all work.
February 25, 2012 by Blackqueen

Calculus. I need help!
i dont know which one is match. i tried those problem. i couldnt solve it Find y' by implicit differentiation. Match the expressions defining y implicitly with the letters labeling the expressions for y'. 1. 7xsiny+2cos2y=2cosy 2. 7xcosy+2sin2y=2siny a. 7cosy/7xsiny-4cos2y+...
March 1, 2012 by LISA

Calculus I, differentiation
The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...
February 24, 2013 by Brian

Biology
You are testing a hypothesis that population density of a particular plant species influences the rate at which a pathogenic fungus infects the plant. Because the fungus causes visible scars on the leaves, you can easily determine whether a plant is infected. Design an ...
August 26, 2013 by Anon

Physics
4th order dark fringe and 2nd order bright fring spaced 2.5cm apart appear on the screen placed 1 m behind the double slit. What is the spacing of the slits if the waveleght of incident light is 500nm? x=2.5cm=.025m L=1m wavelegth= 500nm = 5x10^-7m d=? x/L=wavelength/d d= (...
April 22, 2008 by Andrea

chemistry
A solution is prepared by dissolving 0.2222 (0.0002) g of KIO3 in 50.00 (0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an appropriate number of ...
March 28, 2010 by Hobson

English
1. The finalists in the chess tournament were her and I. 2. Them and Jack want to go to the circus on Friday night. 3.Sara told him and I about the new restaurant. 4.Did Lawrence read the article about volcanoes to she and her sister. 5.Whom will bring the refreshments for the...
April 11, 2011 by Hayley

Math
i am trying to transform a piece wise function, but my problem is that the lines are so irregular i cant tell if it is correct. i can't even tell the equation of the lines I'm attempting to transform. y= -2/3 x -6 if -9<=x<-6 y= 1/3 x if -6<=x<0 then the ...
November 25, 2011 by Cody

Statistics
I already found part A just need help with B! The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct...
November 7, 2013 by Casey

Chemistry
when 2 moles of potassium chlorate crystals decompose to potassium chloride crystals and oxygen gas at a constant pressure and temperature, 78.0 kj of heat is given off. write a thermodynamic equation for this reaction.I don't know how to set up the equation i know that for ...
October 16, 2014 by Cynthia

Pages: <<Prev | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | Next>>

Search
Members