Wednesday

September 3, 2014

September 3, 2014

Total # Posts: 744

**Physics**

A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of the velocity of the ...
*September 26, 2011*

**information technolgy**

hi I need help with this question.how numbers such as isbn,id,student,work with ciphers.And i also needed simple information on ciphers.
*September 23, 2011*

**information technolgy**

Hi I need help trying to create a code to encrypt and decrypt a message in netbeans.I know what to do but I cant get it to encrypte and decrypte.Can you please help me.
*September 22, 2011*

**information technology**

Hi I need help trying to create a code to encrypte and decrypte a message in netbeans.I know what to do but I cant get it to encrypte and decrypte.Can you please help me.
*September 21, 2011*

**Information Technology**

hi I have an Information Technology assignment to do it is about a cipher.Can you help me to write out an java program about any cipher.I have tried out an program but it is not working.
*September 14, 2011*

**Chemistry**

622.5 not 662.5
*September 14, 2011*

**Math**

Ann, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at his business each Saturday. How Many Combinations of two sisters are possible?
*September 13, 2011*

**Physics**

May my sacrifice be beneficial to the common good.
*September 13, 2011*

**Physics**

So answer = 4540! Yes physics 221 students, this answer was brought to you by my failure to complete Mastering Physics problem and ended up pressing the show answer button
*September 13, 2011*

**Physics**

Superman throws a boulder of weight 3500 N at an adversary. What horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 12.7 m/s^2? F=? Fnet(x)=MA(x) I did (3500 N)(12.7 m/s^2) = 44450 N This answer is wrong. So what's up?
*September 13, 2011*

**IT(information technology)**

hi I have an IT assignment to do it is about a cipher.Can you help me to write out an java program about any cipher.I have tried out an program but it is not working.
*September 13, 2011*

**physics**

A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 54° above the horizontal. The end of the ramp is 1.3 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
*September 13, 2011*

**physics**

First you have to convert the miles into meters. There are 5280 feet in a mile, then there are 12 inches in a foot, then 2.54 centimeters in an inch and then 100 centimeters in a meter. So you should get ((262.4)(5280)(12)(2.54))/(100)= 422291.8656 meters. Speed= distance/time...
*September 13, 2011*

**information technology**

hi I have an IT assignment to do it is about a cipher.Can you help me to write out an java program about any cipher.I have tried out an program but it is not working.
*September 12, 2011*

**english**

hi I need help with an english question. Compare the island in the opening and closing chapters of the novel lord of the flies. About half a page
*September 12, 2011*

**english**

compare the island in the opening and closing chapters of the novel lord of the flies.
*September 12, 2011*

**math**

What is the average 3 point throw speed in basketball at professional level in meters per second?
*September 8, 2011*

**History**

Is fish considered a livestock in Texas?
*September 6, 2011*

**Physics**

Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. What is the ...
*September 5, 2011*

**Physics**

A helicopter is lifting off from the ground and is moving vertically upward. The graph shows its vertical velocity vy versus time. How high is the helicopter after 12.0 s have elapsed?
*September 5, 2011*

**College Algebra**

The school play sold 498 tickets. Students paid $3.50 each, while non-students paid $5.50 each. If a total of $2121.00 was collected, how many students and how many non-students attended?
*September 1, 2011*

**math**

I do not understand this?
*August 25, 2011*

**math**

Find the mean, median, mode,range of each data. 1. 34,41,37,29,34 2. 9,21,93,31,31 3. 34,20,24,12,60 4. 74,92,67,45,67
*August 25, 2011*

**Math**

A contractor requires a cement mix that is 70% sand and 30% cement. He has 700 kg of a cement mix that is 80% sand and 20% cement. How much cement should he add so that he gets the required mix? My set up: required mix = (S)(.7) + (C)(3) 700kg = (S)(.8) + (C+X)(.2) Is this ...
*August 25, 2011*

**Physics**

A ball is thrown straight up in the air and passes a window 0.30s after being released. It takes 1.5s to go from the window to its maximum height and back down to the window. What was the initial velocity of the ball when it was released? I found where the ball would be after ...
*August 25, 2011*

**Math**

Sorry. It's supposed to be wall and how many walls they can paint in 1 day.
*August 24, 2011*

**Math**

Two employees are painting wall. A takes twice as long as B to paint the same area. During a typical 8-hour day, A works the full 8 hours, but B takes a 2-hour break. A paints one way in a day. How many walls do both employees paint together? I need an explanation on how to ...
*August 24, 2011*

**Physics**

Okay I understand the problem now and I got the answer right doing it your way. Thanks a lot for the explanation. It really helped!
*August 16, 2011*

**Physics**

Oh okay. I think this makes sense. Thanks for the explanation! For the first Vx, how come the 5.8 is negative?
*August 16, 2011*

**Physics**

But is centripetal acceleration the same as average acceleration? What's the point of the problem giving information about time if it's not even used in the process?
*August 16, 2011*

**Physics**

For no apparent reason, a poodle is running at a constant speed of 5.80 m/s in a circle with radius 2.3 m. For t_delta = 0.5 s calculate the magnitude of the average acceleration a_av. I have no idea how to start this problem because I'm trying to use this equation: a_av...
*August 16, 2011*

**us history**

give one example of how the action of an individual,group,or institution can affect society?
*August 14, 2011*

**science**

give one example of how the action of an individual,group,or institution can affect society?
*August 14, 2011*

**Physics**

Thank for you the explanation! But I'd like to ask, how come the last equation isn't V^2/g = 15.2 + 12(2Vsin45/g)?
*August 9, 2011*

**Physics**

In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 43.8 m/s, to his enemy's car, which is going 55.8 m/s. The enemy's car is 15.2 m in front of the Indy's when he lets go of the grenade. A) If Indy throws the grenade ...
*August 9, 2011*

**Physics**

A baseball is hit with a speed of 27.0 m/s at an angle of 42.0 deg. It lands on the flat roof of a 10.0 m-tall nearby building. If the ball was hit when it was 1.0 m above the ground, what horizontal distance does it travel before it lands on the building...
*August 2, 2011*

**5th grade math**

I need to name ten ways I can use number?
*August 2, 2011*

**Chemistry**

You are given 73 mL of CO2 at 0.69 atm. What volume (in mL) would the CO2 occupy at 0.67 atm if the temperature is maintained at a constant 25 °C.
*July 30, 2011*

**Chemistry**

What mass (in grams)of KNO3 would have to be decomposed to produce 29 L of oxygen measured at STP?
*July 29, 2011*

**Physics**

A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing directly opposite at point ...
*July 27, 2011*

**physics**

A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing directly opposite at point ...
*July 26, 2011*

**Physics**

I got the x-component to be: 10+8.66+3.42 which is 22.08. But I also have to divide that by the total time that the ant traveled, right? So that time would be 5.3? I got 4.166 when I divided it but the correct answer it supposed to be 3.19. I really don't know how to get ...
*July 21, 2011*

**Physics**

An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.00 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another 10.0 cm in 1.40 s. A. ...
*July 21, 2011*

**Physics**

An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.00 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another 10.0 cm in 1.40 s. A. ...
*July 21, 2011*

**algebra 2**

Find the inverse of the function. f(x) = 10^x + 2
*July 16, 2011*

**algebra 2**

Barry Newman's savings account has a balance of $2707. After 4 years, what will the amount of interest be at 5% compounded annually?
*July 16, 2011*

**algebra 2**

$9000 is invested at 8% compounded quarterly. In how many years will the account have 20) grown to $11,000? Round your answer to the nearest tenth of a year.
*July 16, 2011*

**algebra 2**

Rewrite as a single logarithm. 5 logb m -6/5 logb n +1/3 logb j - 2 logb k
*July 15, 2011*

**Chemistry **

How many milliliters of a 2.5 hydrochloric acid solution would be needed to react completely with 32.0 grams of magnesium metal
*June 16, 2011*

**Conservation of energy**

Can someone explain to me what happens when you take a slap shot in hockey according to conservation of energy? I think that when you wind up you have potential energy, then when you swing the stick towards the puck you have kinetic energy, then when the stick flexes you have ...
*June 13, 2011*

**Chemistry**

A 0.400 gram sample of white powder contains 0.141 of potassium, 0.115 grams of sulfur, and 0.144 grams of oxygen. what is the empirical formula?
*May 31, 2011*

**math**

3 ones, 4tenths, 5 hundredths and 2 tens = ?
*May 4, 2011*

**math**

5.4= 5 4/10
*May 3, 2011*

**math**

write as mixed numbers 3.2= 5.4=
*May 3, 2011*

**science**

Which of the following compounds has more than one some; PtCl_5NH_3, Co(BH_3)_4Cl_2, Pt(Co)_2Cl_2, Rb_3[Cr(CN)_6]
*April 30, 2011*

**math**

4 tenths, 5 hundreds, and 6 hundredths = ?
*April 28, 2011*

**physics**

Above answer is completely wrong.. it seems he forgot that it's an initial value problem
*April 5, 2011*

**math**

5+(3x3-3) / 2 =
*April 5, 2011*

**math**

What is the union of x and y? X. (3,6,9) Y. (5,10,15)
*March 27, 2011*

**chemistry**

Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF
*March 25, 2011*

**MATH**

THE MIDDLE IS 14 & 23 = 37/2 = 18.5 WHAT IS THE HUNDREADTH ????
*March 24, 2011*

**MATH**

FIND THE MEDIAN OF THE FOLLOWING PROBLEM. ROUND TO THE NEAREST HUNDREADTH. 8,9,10,12,14,23,23,29,34,37
*March 24, 2011*

**physics**

A hollow, thin-shelled ball of mass rolls along a horizontal surface with a translational speed of .
*March 22, 2011*

**geometry**

In the parallelogram above, line segment AE equals 12 mm. Line segment BE equals 16 mm. What is the length of line segment CD in the parallelogram above?
*March 17, 2011*

**calculus**

let f(x) = Sec (x) in the interval 0<x<pie/3. What is the average rate of change of f(x) with respect to x in this interval?
*March 10, 2011*

**math**

How do the acute and obtuse angles compare to the right angle?
*March 9, 2011*

**chemistry**

What is the vapor pressure (in mm Hg) of a solution of 12.5 g of glucose ( C6H12O6) in 75.0 g of methanol (CH3OH) at 27 degrees celcius? The vapor pressure of pure methanol at 27 degrees celcius is 140 mm Hg.
*March 9, 2011*

**chemistry**

How many grams of water should you add to 31.0g of sucrose,C12H22O11, to get a 0.855 m solution?
*March 9, 2011*

**math**

that is all the information given
*February 28, 2011*

**math**

beth has a box of shirts.one half of the shirts are small,2/5 of the shirts are meduim,and 5 shirts are large.how many shirts are in the box?
*February 28, 2011*

**math**

show why two thirds of 9 and one third of 18 name the same number.use counters or draw a picture to explain your reasoning.
*February 24, 2011*

**Physics**

you actually have to subtract the frictional force not add it
*February 21, 2011*

**english**

what is number facts about the topic gel pens
*February 16, 2011*

**social studies**

unscramble siclalacs
*February 16, 2011*

**Physics**

0.11 m, so the center of mass of that part of the chain is 0.055 m below edge. W = mgH = (0.021/3)kg*g*(0.055) = ____J notice that the kg is different.
*February 16, 2011*

**Physics**

A 55 kg skier is going down a slope with an angle of 47 degrees. Mk= 0.15. How fast is he going after 6 seconds?
*February 15, 2011*

**Physics**

A 200N sign hangs and makes a 15.5 angle with the horizontal. What is the Tension in each rope?
*February 15, 2011*

**7th grade introduction/conclusion**

Sorry for a useless reply, but Kathryn, if you wrote a novel you wouldn't be using "u" and "ur"
*February 10, 2011*

**math**

What is the value of 3/14 rounded to the nearest fourth?
*February 9, 2011*

**9th grade Math**

85 x 8 = 680
*January 22, 2011*

**Social Studies 20-1**

Could you tell me what kind of nationalism they might be? (just so i get an idea)
*January 17, 2011*

**Social Studies 20-1**

Can someone explain to me what these sourses mean and how they relate to nationalism? (just so i have an idea of what i am going to write about) SOURCE 1 "the lines of red are blood, nobly and unselfish shed by men who loved the liberty of their fellowmen more than they ...
*January 17, 2011*

**world history**

Prehistory ended with the invention of what?
*January 17, 2011*

**calculus**

Find the point on the curve y=x^(1/2) that is a minimum distance from the point (4,0). My book says you use the distance formula. Then you let L = D^2 because the minimum value of D^2 will occur at the same value of x as the minimum value of D. What is L, though.
*January 16, 2011*

**Math**

Thank you!
*January 15, 2011*

**Math**

DETERMINE the equation of the circle that has the following three points on its circumference: A(1,5), B(3,7) and C(5,5).
*January 15, 2011*

**math 20**

how did u get -3^3 and 4^2?
*January 15, 2011*

**physics**

The velocity of a diver just before hitting the water is -8.4 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.82 s of the dive? This problem with different numbers has been done on here before, but when i ...
*January 14, 2011*

**biology**

A eukaryotic gene typically has all of the following features except: a) an operator b) control elements c) a promoter d) introns e) a terminator
*January 13, 2011*

**fraction x whole number**

the problem is 7/10 x 30 = how do you convert and get the answer
*January 4, 2011*

**concavity**

The graph of the function y= x3+6x2+7x-2cos x changes concavity at x=
*December 31, 2010*

**chemistry**

okay thanks...but dont you have to use roman numerals for elements in the "d" block?
*December 14, 2010*

**chemistry**

write the correct formula for the compound listed below: 1. Silver Oxide my answer: AgIIO correct?
*December 14, 2010*

**english**

can feelings be personified or is it more a projection? i am writing an essay on Life of Pi and i would like to say that Richard Parker is a projection of Pi's fears. Does the use of the word projection make sense?
*December 14, 2010*

**math**

if you find the decimal value for each of these you will be able to easily tell the order. for example: the decimal value for the fraction 3/4 is .75 hope this helps!
*December 12, 2010*

**english**

okay thanks! because i am having a difficult time writing an essay i have! but that helps thanks
*December 12, 2010*

**english**

when writing an essay is this a good way to do it?: thesis statement body paragraphs conclusion intro
*December 12, 2010*

**chemistry**

Butane has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 degrees C. A 250mL sealed flask contains 0.5g of butane at 25 degrees C. How much butane is present as a liquid? If the butane is warmed to 25 degrees C, how much is present as a liquid
*December 10, 2010*

**Algebra**

I am stuck... find the real solutions of the equation x to the 4th power minus 20x squared plus 64 equals 0
*December 8, 2010*

**chemistry**

What is the expected van't Hoff factor for NaC2H3O2 in an aqueous solution, assuming 100% dissociation.
*December 6, 2010*

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