Saturday

January 31, 2015

January 31, 2015

Total # Posts: 685

**Chemistry (Chromatography)**

Comment on the order of elution of the following solutes in (a) normal-phase and (b) reversed-phase liquid chromatography. Give reasons for the difference. Solute X nonpolar Solute Y polar, a dipole Solute Z polar, more polar than Solute Y
*January 24, 2015*

**ART check answers please**

Ok thank you! Yea 7 is a bad question in my opinion! 2 is c?? 6 is a??
*January 24, 2015*

**ART check answers please**

1. A museum professional has been working extended hours to remove dirt and grease that a vandal left on a painting. This professional is most likely an a)curator b)conservationist*********** c)historian d)archaeologist 2. Pick the statement that best describes why the museum...
*January 24, 2015*

**math**

Jeremy says that the absolute value of 6 is -6.is he correct?explain
*January 19, 2015*

**physics**

Now how far the will the ball in the problem below will hit the ground? a. 10m b. 6.4m c. 9.6m d. 20m e. 140m a ball rolls off the table top 2m tall. with a velocity of 10m/s. with what speed will it strike the ground? V^2 = Vo^2 + 2g*h V^2=0^2+2*9.8*2 V^2=39.2^2 v=6.3m/s
*January 4, 2015*

**physics**

a ball rolls off the table top 2m tall. with a velocity of 10m/s. with what speed will it strike the ground? A. 10m/s B. 6.3m/s C. 16.3m/s D. 11.8m/s E. 139m/s
*January 4, 2015*

**physics**

An acceptable unit for power would be A. kg-m/s B. kg-m-m/s/s/s C. N/s D. Kg-m-m/s/s E. J-s
*January 4, 2015*

**physics**

a wooden block of mass equal to 15kg is pressed against a spring. The spring has constant of 225N/m. If the spring is compressed 0.15m, how fast will the block travel when released?
*January 4, 2015*

**physics**

a toy car rolls horizontally on to a ramp that has a total height of 0.8m. what minimum velocity will allow the car to reach the top of the ramp/
*January 3, 2015*

**english **

Last night, Jason introduced me to a friend of his. Whose hair was all the way down to the back of his knees in a single dreadlock.
*January 2, 2015*

**Math**

A fence is to be built to enclose a rectangular area of 310 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the enclosure that is most ...
*December 11, 2014*

**Math-Calculus**

Thank you very much Reiny for this wonderful explanation. I am not the brightest bulb and yes 2 hours to be precise.
*December 11, 2014*

**Math-Calculus**

Find the point on the line -2x + 4y + 3 =0 which is closest to the point (-2,1). Note: I have been struggling on this for hours!
*December 11, 2014*

**Physics**

A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b) To hit the center of the target the dart must ...
*December 6, 2014*

**chemistry**

a mixture of 39.8g containing potassium chloride and potassium trioxochlorate (v) upon heating, the residue weighed 28.7g what is the percentage mass of potassium chloride in the residue?
*November 21, 2014*

**math**

2.joe was making mixed nuts.he used 2 1/4 pounds of pecans and 3 1/5 pounds of cashews.how many pounds of mixed nuts did joe make? A.5 17/40 B.5 2/9 C.5 1/2 D.5 9/20
*November 20, 2014*

**art**

im sure its c
*November 20, 2014*

**science**

how do i find the percent. then lable it on a smaller diagram
*November 12, 2014*

**College physics**

In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction ...
*November 6, 2014*

**science**

Over time,a plant pollinated by a hummingbird has developed very long, tube like flowers.Why might the flower have adapted in this way?
*October 30, 2014*

**Math**

I did this test, the answer is c: 5 buns and 3 patties :)
*October 29, 2014*

**Anatomy and Physiology**

Im gonna go ahead and answer this myself and say that I have no idea and I am most likely going to fail this assignment
*October 19, 2014*

**Anatomy and Physiology**

There are many disease, disorders, syndromes that attack the muscular system such as muscular dystrophy, hypotonia, polio, etc. Because of our research facilities and advanced medical care in the United States, many of the people in our country who are victims of these ...
*October 19, 2014*

**Physics**

Two forces parallel to the x axis do 17.2 J of work on a small tray while moving it 19.0 m in the x direction across a gym floor. One of the forces has a value of +3.93 N in the x direction. What is the other force?
*October 14, 2014*

**Chemistry**

if all the macro-molecules are made mainly of the elements CHO, how are they different?
*October 8, 2014*

**Algebra**

The length of a rectangle is 11 cm more than the width. The perimeter is 90 cm. Find the length and width of the rectangle.
*September 7, 2014*

**Mathematics**

The minute-hand of a clock is 6cm long. How far does the end of the hand travel in 35m?
*July 5, 2014*

**physical science**

A 0.200 kg ball sits on a shelf 2.00 meters from the floor and then falls to a point 1.00 meter from the floor ignoring any affects due to fiction at this position_______
*May 30, 2014*

**Physics quick help please**

6. If 4.0 × 1018 J of work done on a point charge changes its electric potential difference by 25.0 V, then what is the magnitude of the charge? (Points : 1) 1.6 × 101^9 C 4.0 × 101^9 C 1.6 × 101^8 C 4.0 × 101^8 C 7. Two parallel plates have an ...
*May 1, 2014*

**business**

Research studies indicate that the referral approach is effective because: A. customers seldom trust a salesperson, but do trust a third party. B. customers may be far more impressed with your good points if they are represented by a third party, rather than by you. C. ...
*April 30, 2014*

**Probability**

a) y/(1+mu) b) 1+mu c) (y+1)/(1+mu)
*April 3, 2014*

**probability**

2) Part a
*April 3, 2014*

**Algebra **

What is a quartic function with only the two real zeros given? x = -4 and x = -1 A. y = x^4 + 5x^3 + 5x^2 + 5x + 4 B. y = x^4 - 5x^3 - 5x^2 - 5x - 4 C. y = -x^4 + 5x^3 + 5x^2 + 5x + 4 D. y = x^4 + 5x^3 + 5x^2 + 5x - 5
*March 24, 2014*

**Math**

Im think E
*March 14, 2014*

**Math**

Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4
*March 14, 2014*

**Plz help me.**

1.D 2.D 3.B 4.A I got an 4/4 on connexus. thanks damon but your wrong on 3 its B
*March 13, 2014*

**Plz help me.**

what the hell is you saying Soso
*March 13, 2014*

**Math**

The velocity (feet per second) of an object is given by the equation v = 3(2t + 1)0.4. What is the equation for the acceleration of the object? What is the equation for the displacement of the object? The displacement is initially 25 feet. What are the values of the ...
*March 12, 2014*

**Chemistry**

What are the typical ppm values of hard water and an unknown water sample and how do their titrations compare?
*March 12, 2014*

**math**

The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
*March 11, 2014*

**math**

the temperature has been dropping 3 degrees per hour. at midnight the temperature was 25 degrees. let y be the temperature after x hours
*February 24, 2014*

**Math**

Stacy Multiplied 5 * 9 and said the answer was 44. What 2 patterns could you use to show that her answer is not correct?
*February 24, 2014*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. If the ball leaves her club with a velocity of 46.0 m/s at an angle 0f 35.0º above the ground, find the time that the ball is in the air before it hits ...
*February 17, 2014*

**English**

Could someone explain whats the difference between these two questions? Why do you wish to study the program(s)? What influenced your decisions to apply to the program(s)?
*February 10, 2014*

**Physics**

) The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state?
*February 6, 2014*

**Health**

Alright thank you
*January 27, 2014*

**Health**

Thank you so much, do you know how many milligrams would be good?
*January 27, 2014*

**Health**

If you have tiny white bumps on your lips, probably caused by frequent lip biting, how can you treat it? Please help
*January 27, 2014*

**geometry**

Quad ABCD with diagonal DB. <adc=90, <c=91, <cbd=43. segment ad=segment dc=9. Which segment is longer ab or ad and why? steve, how are you solving for <abd, what are you assuming about <abc?
*January 24, 2014*

**math**

Thank you steve, but something must be wrong with this problem. We have not learned law of cosines or law of sines yet and the correct answer is ad?? Baffled at how to get this based on what we are studying, SAS and SSS inequality theorems.
*January 24, 2014*

**math**

How are you solving for <abd. Making assumptions?
*January 24, 2014*

**math**

Quad ABCD with diagonal DB. <adc=90, <c=91, <cbd=43. segment ad=segment dc=9. Which segment is longer ab or ad and why?
*January 24, 2014*

**Science**

@Fuyuko your amazing i got 100%
*January 21, 2014*

**Science**

Which aspect of Einstein's theory of special relativity was testable? the postulates only the postulates and the predictions the predictions only none of the aspects
*January 8, 2014*

**Physics 221**

What is the magnitude and direction of the electric field at a point 0.75 m away from a point charge of +2.0 pC?
*December 31, 2013*

**Math help ms sue.**

that teacher is very rude
*December 16, 2013*

**MAA Global Science**

A lump of ice falls from a jet plane as it tries to land at an airport. If the ice hits the ground with a vertical speed of 85m/s, what was the height of the plane when the ice fell off.
*December 13, 2013*

**please help me!! with this science!!!!!**

all of them is correct i promise
*December 11, 2013*

**Trig**

Sum and diffence formula Finding Exact value of Tan 105-Tan 10)-15)/1+ tan(105)Tan(-15)
*December 9, 2013*

**Geometry**

Find the missing numbers for the dimensions and measures of a rectangular prism... Length ? Width 7 m Height 5 m Surface Area 214 m to the second power Volume ? Please answer the one's with a ?. Thank you.
*December 6, 2013*

**Geometry**

Let's say a company is manufacturing juice boxes that are rectangular prisms with dimensions 4 inches by 3 inches by 4 inches. The company has a warehouse whose dimensions are 40 feet by 30 feet by 20 feet. If the company makes 200,000 juice boxes, will it be able to store...
*December 5, 2013*

**math**

How do you work this word problem? The team played 125 games and lost 15 more than they won.How many did they lose
*December 2, 2013*

**Help Please!!!- Physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
*November 22, 2013*

**math**

How many formula units of the compound are present in 5.7g of Epson salt?
*November 8, 2013*

**Health part 2**

its not c
*November 5, 2013*

**Math**

So, one of my subjects midterm I got 71% (43 out of 60). The mid-term test was worth 25%. It is my first evaluation. How do I calculate my final mark so far? :|
*October 23, 2013*

**Physics**

A juggler throws a ball straight up into the air and it takes 2.80 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
*October 21, 2013*

**Math**

Ginny has two quarters. For every week that Ginny does all of her chores, her mother increases the amount of money Ginny has exponentially. The equation y=0.5*3^x represents the amount of money that Ginny has after x weeks of doing all of her chores. What does the term 3^x ...
*October 2, 2013*

**Algebra**

Debbie finished her algebra test early so she decided to check each of her answers. After checking her answer to question #10, she realized she made a mistake in her solution. In which step does Debbie make her mistake? Original Equation: 2 + 3y = 5(y - 2) Step One: 2 + 3y = ...
*September 25, 2013*

**History (chronological order of date)**

11,000 b.c. 540 b.c. 0 894 a.d.
*September 25, 2013*

**math**

A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?
*September 5, 2013*

**Geometry**

(5d + 5) - (d +1)
*September 4, 2013*

**Physics**

A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 50 m downstream from the point directly across the river, which is 79 m wide. (a) What is the speed of the river current? m/s (b) What is the swimmer's speed relative...
*August 1, 2013*

**Math 6th grade**

What is smart estimation to determine an estimation range.
*July 17, 2013*

**physics**

A student runs through a field 100m(E) then 200m(S) and finally 50(45 degrees S of E find his final position relative to his starting point? please explain steps Answer is 272(60 degrees S of E)
*July 4, 2013*

**Physics**

Jim is 100m(S) of Paul. Paul begins to walk east at 2.0m/s the same time Jim begins to walk west at 3.0m/s. what is the displacement of Jim from Paul 20 seconds later? Please explain steps Answer is 141(SW)
*July 4, 2013*

**physics**

A jet starting from rest reaches a speed of 241km/h on 96.0m of runway. Determine the magnitude of the Jet's acceleration? Answer is 23.3m/s^2
*July 3, 2013*

**Physics**

I have no clue to this question which is why i needed the help :(
*June 10, 2013*

**Physics**

What value of voltage will be reached across the plates of a capacitor, after two time constants, if the maximum value of voltage when fully charged, reaches 200 volts?
*June 10, 2013*

**Math help!**

A bag contains 9 blue marbles and 1 green marble. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble? Is the answer 1/9?
*May 30, 2013*

**Math**

I forgot to mention the die has 6 sides.
*May 30, 2013*

**Physics**

Find the scalar product of the vectors ai+bj and bi-aj . Where a and b are arbitrary constants. What's the angle between the two vectors?
*May 30, 2013*

**Physics**

1/2mv^2(final)-1/2mv^2(initial) 2600J
*May 30, 2013*

**Physics**

1/2mv^2=1/2mv^2 v(subcompact)= 116.0762 km/h
*May 30, 2013*

**Physics**

Cannot answer need more information.
*May 30, 2013*

**Physics**

.75 Joules
*May 30, 2013*

**math**

2 51 45 58 41 44 37 38 40 44 45 40 59 45 44 34 44 43 48 32 38 1.Determine the mean of the data 2.Determine the standard deviation of the data
*May 19, 2013*

**IIT-JEE**

i have to prepare for my IIT-JEE examination. But i have no knowledge about the books for preparation. Please tell me some books for the preparation of objectives for IIT-JEE. Now i am in 10+2 class.
*May 7, 2013*

**physics**

v(b)=2m/s V(w)=1m/s Velocity of boat w.r.t water= V(bw)=v(b)-v(w) =(2-1)m/s =1m/s Time= 3min =180s Distance= v(bw)*time = 1m/s*180s = 180m.
*May 7, 2013*

**Physics**

its (c)-inertia
*May 7, 2013*

**english**

where did the story October sky take place
*April 29, 2013*

**math**

Using the method of completin the square solve x2-27x+50
*April 24, 2013*

**English **

what does he makes his life seems like "poor me" and he is elevated the process of suffering to a level that any martyr would admire means??
*April 17, 2013*

**Applied Calculus**

The world population at the beginning of 1990 was 5.3 billion. Assume that the population continues to grow at the rate of approximately 2%/year and find the function Q(t) that expresses the world population (in billions) as a function of time t (in years), with t = 0 ...
*April 14, 2013*

**Applied Calculus**

Thanks to both of you, I won't forget how to do this next time! It makes much more sense now, and will be even easier on basic functions versus logarithmic/exponential functions. I think it was the natural log that tripped me a little bit there, but thank you for the ...
*April 12, 2013*

**Applied Calculus**

I am sorry, the function is g(x)= x/(ln(x))
*April 12, 2013*

**Applied Calculus**

Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___
*April 12, 2013*

**Algebra(1st one was typo)**

The function f(x)=x^3 +1/4 x −1^4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f^−1 (x) ?
*April 11, 2013*

**Algebra**

The function f(x)=x 3 +1 4 x−1 4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f −1 (x) ?
*April 11, 2013*

**Geometry**

Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*April 11, 2013*

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