Questions Asked on
July 31, 2014

chemistry
a) Calculate the percent ionization of 0.125M lactic acid (Ka=1.4x10^4) b) Calculate the percent ionization of 0.125M lactic acid in a solution containing 0.00075 M sodium lactate.
asked by Nina 
percentages
Say an advertiser makes $0.10 every time someone clicks on their ad. Only 20% of people who visit the site click on their ad. How many people need to visit the site for the advertiser to make $20?
asked by Anonymous 
physics
A string is wrapped around a uniform disk of mass M = 1.6 kg and radius R = 0.10 m. (Recall that the moment of inertia of a uniform disk is (1/2)MR2.) Attached to the disk are four lowmass rods of radius b = 0.17 m, each with a small mass m = 0.6 kg at
asked by sara 
greatbay community college
A 5.00 kg stone is thrown upward at 7.50 m/s at an angle of 51.0 degrees above the horizontal from the upper edge of a cliff, and it hits the ground 1.50 s later with no air drag. Find the magnitude of its velocity vector just as it reaches the ground.
asked by Anonymous 
science
forces of 20N to the south,40N to the northeast, and 10N to be east act on the object.the magnitude of resultant force is a)10N b)39 N c)20 N d)46 N
asked by sstt 
life science
1.why are fossils important discoveries? 2. Why are fossils kept in a glass box in the museum? 3.What feature does australopithecus sediba share with humans? 4.What feature does australopithecus sediba share with apes? 5.Explain the scientific
asked by Okuhle 
Life sciences
Why are the fossils kept in a glass box in the museum?
asked by Donald 
science
a mixture of gases contains 64g of methane, 64g of oxygen and 64g of sulphur dioxide. The pressure of the mixture is 210 kpa. what is the partial pressure (in kpa) of the methane expected to be?
asked by olaitan daviesstunt 
Science/Physics
Andee has a mass of 68.5 kg on earth. What is his weight on Earth? What should his mass be in order to have the same weight at the surface of the moon?
asked by Gwyn Kyla Agduma 
Geometry
OPQRSTUVWX is a regular decagon. A rotation of A degrees about U maps X to R. Given A < 180 degrees, find A. Thought it was 144 but it isn't.
asked by Sheenybeany 
geometry help!! answer all questions!! please
1) Write the translation that maps P(4, 2) onto the point P ' (1, 1)? 2) What are the coordinates of the reflection of the point (5,1) over the line y = x? 3) The coordinate notation for reflection over the yaxis is ?. 4) If a translation has a
asked by Lulu 
Ecology
Aside from lead, the two air pollutants most hazardous to human health are: A. sulfur dioxide and carbon monoxide. B. ozone and sulfur dioxide. C. ozone and fine airborne particulates. D. nitrous oxides and carbon monoxide. is it A
asked by Amy 
Math
There are some rabbits and chickens in a farm. Together they have 35 heads and 94 feet. How many rabbits? How many chickens?
asked by Prolly 
Physics
Two trains, one starting in Calgary and the other in Edmonton, travel toward one another. The Edmonton train travels at 120 km/h toward Calgary, while the Calgary train travels at 140 km/h toward Edmonton. If the trains begin at the same time and Edmonton
asked by JD 
life orientation
ways 2 address xenophobia in the community or southa africa or globally
asked by ntosh 
developmental appropriate curriculum
Which of the following strategies is best for teaching motor skills? A. Suppressing motor skills that may be developing early B. Telling children to try harder C. Coaching and demonstration D. Experimentation and strict correction
asked by daniela 
Translations
Point Q is the image of point P under a dilation with center O and scale factor 4. If PQ = 18, then what is OP?
asked by Sheenybeany 
physics
Calculate the energy required to vapourise 50g of water Initially at 80¡ãC if the specific heat capacity of water is 4.2 J/g.k. (specific latent heat of vapourisation of water is 2260 J/g)
asked by Francis 
AP Calc
The picture to the right shows the Ben Franklin Bridge which stretches across the Delaware River joining Pennsylvania and New Jersey. The center span of the bridge is about 4200 feet long. The suspension cables hang in parabolic arcs from towers 750 feet
asked by Anon 
Geometry
Write the translation that maps P(4, 2) onto the point P ' (1, 1)? What are the coordinates of the reflection of the point (5,1) over the line y = x? The coordinate notation for reflection over the yaxis is ?. If a translation has a coordinate
asked by Diamond 
physics
A male cheerleader does 2.25 kJ of work in lifting a 57.5 kg cheerleader 1.25 m off the ground during the half time show. The energy gained by the lifted cheerleader is __________ kJ.
asked by HELP ASAP 
AP Calc
When a chain hangs under its own weight, its shape is catenary. The equation of a catenary with a vertex on the yaxis is y=e^x+e^x. Find the length of the chain from x=2 to x=2. Then use the same technique from Problem #8(Previous AP calc problem I
asked by Anon 
business math
Lane French had a bad credit rating and went to a local cash center. He took out a $100.00 loan payable in two weeks at $105.50. What is the percent of interest paid on this loan?
asked by erica 
Chemistry
Calculate PH of 0.05 M solution of ammonium acetate
asked by Jane 
math
A specially made pair of dice has only one and twospots on the faces. One of the dice has three faces with onespot and three faces with twospot. The other die has two faces with onespot and four faces with a twospot. One of the dice is selected at
asked by Anonymous 
math
6. Joe played golf with Sam on a speacial par 3 course.. They played nine holes. The expected number of strokes on hole was 3. A birdie is 1 below par. On nine holes Frank made par on 1 hole, got 2 birdies, one eagle, four bogies and one double bogie. How
asked by tsunayoshi 
prealgebra
A building lot in a city is shaped as a 30° 60° 90° triangle. The side opposite the 30° angle measures 41 feet. a. Find the length of the side of the lot opposite the 60° angle. b.Find the length of the hypotenuse of the triangular lot. c. Find the
asked by Anonymous 
physics
Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?
asked by l 
Math
After Michael 110 baseball cards to Sally and 75 to Heidi, he still has 315 left. What percent of his cards did Michael give away? 110 + 75... and then??
asked by HELP 
strayer university
P5. The following information is available to you: travelers’ checks _ $1 million; coin and paper currency _ $30 million; repurchase agreements and Eurodollars _ $15 million; demand deposits _$25 million; retail money market mutual funds _ $60 million;
asked by kenya 
math
a bowl of fruit has 3 strawberries, 2 banannas and 1 apple. what fraction of the fruit is banannas?
asked by Anonymous 
physics
A solid of mass 1kg suspended by a string is completely immersed in water. If the tension in the string is 5N, calculate the upthrust on the solid. (take g = 9.78m/s)
asked by Francis 
statistics
The following list is a sampling of the costs of various statistics textbooks used at several colleges. Give the upper confidence limit for a 95% confidence interval estimate for the mean cost of all statistics textbooks. 109.95; 92.00; 96.70; 84.85;
asked by martha 
Math
A particle moves with a velocity of v(t)=3cos(2t) m/s along an axis. Find the distance traveled by the particle over the time interval 0 is less than or equal to "t", which is less than or equal to (pi/8)
asked by mike 
physics
A sprinter has a mass of 82.0 kg. If the sprinter is running at a speed of 22.5 km/h, determine his kinetic energy. __________ × 103 J.
asked by help 
physics
A girl lifts her 20kg knapsack a vertical distance of 0.70 m and then she carries it 2510 m across the park to the water fountain. The value of the work done by the girl is __________ J.
asked by HELP ASAP 
physics
A 45.0 g golf ball is released 2.50 m above the ground. The velocity of the golf ball when it hits the ground is
asked by oo 
math
1. A submarine was suituated 800 feet below sea level. If it ascends 250 feet, what is it new position 2. Metal mercury at room temperature is a liquid. Its melting point is 39°C. The freezing point of alcohol is114°C. How much warmer is the melting
asked by tsunayoshi 
trigonometry
An object is attached by a string to the end of a spring. When the weight is released it starts oscillating vertically in a periodic way that can be modeled by a trigonometric function. The object's average height is −20 cm (measured from the top of the
asked by obet 
Ecology
According to the article "The Grim Payback of Greed" our level of consumerism: A. is essentially a creation of the 20th century. B. has declined in the West but is growing rapidly in developing countries. C. is highly correlated with reported levels of
asked by Amy 
physics
A snail moved 0.14 m between two cabbages in 3.0 minutes. The average speed of the snail is
asked by l 
maths
16. A pole of length 10 m casts a shadow 2 m long on the ground. At the same time a tower casts a shadow of length 50 m on the ground, then find the height of the tower.
asked by pritika 
Health
Below are descriptions about the programs that are designed to help prevent suicide. Which statement is true? A. CBT because it teaches the skills needed to deal better with upsetting situations. B. DBT, sometimes called collaborative care management, uses
asked by Lolita 
physics
Jill runs 100 m in 15.0 s. Jon speedwalks 100 m in 30.0 s. If Jill and Jon have the same mass, then Jill's kinetic energy would be
asked by bean 
physics
A hockey player lifts a 600 g trophy up into the air a distance of 75.0 cm. The work done against gravity on the trophy is __________ J.
asked by help 
Calculus
use the simpson's rule with n=10 to estimate arc length of y=x^(1/3), for 1
asked by Rick 
Maths
An 8sided die shows the numbers 1 to 8. A 6sided die shows the numbers 1 to 6. If both dice are rolled at the same time, how many possible outcomes are there?
asked by Alycia 
math(precalculus)
Write the equation of a Rational Function satisfying given conditions. Has vertical asymptotes located at x2 and x=1 Has a horizontal asymptote located at y=0(xaxis) yintercept:(0,2) xintercept (4,0) R(x)= ??? what I did is, R(x)= ax+b/c(x2)(x+1)
asked by Karen 
Logic
Eric is planning a 7day resort vacation. He will play golf on four mornings. He also wants to play tennis but can only play tennis on days he does not play croquet. He will play croquet on any day immediately following a day that he plays golf. What is
asked by Ivy 
Political Issue
Select a professional organization in the nursing industry. Researching a current political issue addressed through the organization.
asked by Sam 
physics
A bus traveled 10.0 km from the north end of the city to the south in 10.0 minutes. The average speed of the bus was
asked by l 
physics
If you travel 10 m [E], 25 m [S], 12 m [W] and 25 m [N], your displacement is
asked by ej 
physics
A car which is traveling at a velocity of 9.6 m/s undergoes an acceleration of 4.2 m/s2 over a distance of 450 m. How fast is it going after that acceleration?
asked by Auqib Ihsan 
math
find the sum of 3/6+4/10+3/30 and reduce to lowest term
asked by cj 
Rewrite this sentence
It is impossible that the allied powers should extend their political system to any portion of either continent without endangering our peace and happiness. This sentence gives a hint of a threat. I have to rewrite the sentence and state the threat
asked by Tina 
Math
find the area of the region bounded by the function y=x^2+5x4 and the xaxis
asked by mike 
maths
Zama had 140 packet of chips and each packet hada mass of 50g what is the mass of all packet of chips together ? Write your answer in kg.find the answer using cross multiply
asked by ofentse mafoko 
physics
How would I figure out the answer to this question? A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from
asked by Liz 
physics
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ: a) constructive interference will occur b) destructive interference will occur c) partial interference will occur d) none of the above Would the
asked by Liz 
English
What is an example of a moral fairy tale in the book "Great Expectations" by Charles Dickens?
asked by Cookie 
physics
In a panicstop, a car's brakes produced an acceleration of 8.0 m/s2 (or a deceleration of 8.0 m/s2). If you are traveling at 35 m/s, your speed after braking for 3.0 s will be
asked by kjonl 
physics
An athlete prepares for practice by walking 820 m in 10.3 min and sprinting 600 m in 3.8 min. Determine the athlete's average speed in metres per second.
asked by HELP ASAP 
physics
The time required for a car to reach 28.5 m/s from rest, accelerating at 3.70 m/s2 is __________ .
asked by HELP ASAP 
current political issue
Explain how nurse leaders can use professional organizations to stay aware of political actions in the nursing and health care industry and the importance of doing so
asked by Sam 
physics
A 31.4kg diver free falls from the diving board and hits the water with a speed of 10.0 m/s. Based on this information, the height of the tower is __________
asked by oihln 
physics
The useful energy output of an engine is 1.50 × 103 kJ and the total mechanical energy input is 4.32 x 103 kJ . The efficiency of the engine is __________%
asked by oihln 
Writing
How might one write a proposal with a sample script for a movie or TV program?
asked by Victoria 
Calculus  Simpson's Rule and Arc Length
Can any show me step by step on how to get this? I keep on getting different answers... Thank You! Use Simpson's rule with n=10 to estimate the arc length of y=x^(1/3), for 1
asked by Chelsea 
Physics check answer please
Would the answer be b)? diamond into air? A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into
asked by Liz 
physics
At exactly the critical angle: a) all light reflects back into the n1 medium b) all light reflects back into the n2 medium c) part of the light reflects back into the n1 medium, the remainder travels along the boundary between the two mediums d) part of
asked by Liz 
Calculus
Determine whether Ax = lnx/(sqrt x) is convergent
asked by Mary 
science
The mass of an object is 217.5g and its volume is 192mL. What is the density of the object?
asked by marva 
statistics
Conduct a chi square analysis to determine whether sex and year in college are related. I have tried to submit the data but I can't seem to make the submission work. For my data I used 20 males and 20 females. and for the year in college I have 10
asked by angela 
Chemistry
For :H2O(g) > H(g) + OH(g); At 3000K and P(total)=1.00 atm, from your K value calculate system composition from 1.00 mol H2O(g) and no products initially. The K I got (using Delta G superscript zero = [Delta H superscript zero][T* Delta S superscript
asked by Briana 
algebra
In a given training week, a swimmer completes 1/4 mile on day one, 3/5 mile on day two, and 2/3 mile on day three. How many total miles does the athlete swim in the given week?
asked by shenae 
To Ms. Sue
Ms. Sue Hi! Im not sure if you will be able to help me with this one, since is Math homework, but this time is just to confirm if Im right the question is: What is 1,112,433 rounded to the nearest ten thousand? A. 1,120,000 B. 1,100,000 C. 1,110,000 D.
asked by Shayna 
math
Kendra bought 4 paintings and wants to hang them side by side on a wall in her bedroom. However, only 3 of the paintings will fit side by side on this wall. How many different ways can Kendra arrange 3 of the 4 paintings on the wall?
asked by William 
Math
Of the books in a library, 1/3 came from Robbie's collection and 15 came from from Marta's. Of the rest 15 were Elena's, 1/5 were Winfield's, and 5 were purchased from the bookstore. How many books are there in the library?
asked by Kitty 
physics
A 120.0 g object is moved from a shelf 2.9 m high to one that is 5.4 m high. The change in potential energy for the object is
asked by earl 
physics
An elastic is stretched with an average force of 120.0 N a distance of 10.0 cm. The potential energy stored in the elastic is
asked by aye 
physics
A hockey puck with a mass of 0.200 kg travels with a speed of 49.6 m/s during a slap shot. The puck's kinetic energy is
asked by bean 
physics
Object A has mass m and velocity v. Object B has 18 times the mass and one third the velocity of object A. The kinetic energy of object B will be Spell check times the kinetic energy of object A.
asked by ayelmao 
physics
A machine loses 600 kJ as waste heat while producing 5,350 kJ of useful energy output. The efficiency of this machine is
asked by l 
physics
Initial sources of energy used to operate machines were __________ and __________.
asked by l 
Math
If the investment rises from $1000 to $5000, the percent is what from the original?
asked by HELP 
Math
9 is 1/3% of what number?? I need help
asked by fined 
physics
An aircraft on its takeoff run has a steady acceleration of 3.0 m/s2. It's velocity after 10 seconds will be
asked by HELP ASAP 
physics
When an object travelling at 12.7 m/s [E] speeds up to a velocity of 21.5 m/s [E] in 3.45 s, the magnitude of the acceleration is __________m/s2.
asked by HELP 
physics
A 130.0 g object is moved from a shelf 0.2 m high to one that is 5.0 m high. The change in potential energy for the object is __________ .
asked by help 
Math
9. If f is a linear function such that f(1) = 5 and f(2) = 1, then f(x + 1) = A. 2x + 1 B. 2x + 3 C. x + 1 D. 2x + 2 E. 2x + 1
asked by Dania 
English
Please help with this whole paragraph I rewrote it and thank you Ms Sue Therefore, supporting the fact, that you can dress a diverse group of students with uniforms, they would not see and believe the things the same way, as other students with uniforms.
asked by Lalo 
Physics
A plane travelling at a speed of 150 meter per second due east of north has to go from point A to point B 500 km apart. If a wind blows straight north at a speed of 20 meter per second find the angle the pilot should follow to reach point B and also the
asked by Satyam