Thursday
August 25, 2016

Posts by Aj

Total # Posts: 332

Physics
The time needed for a water wave to change from the equilibrium level to the crest is 0.4185 s. What fraction of a wavelength is this? What is the period of the wave? Answer in units of s. What is the frequency of the wave? Answer in units of Hz.
October 21, 2012

Physics
Beth, a construction worker, attempts to pull a stake out of the ground by pulling on a rope that is attached to the stake. The rope makes an angle of 60.9 ◦ with the horizontal. If Beth exerts a force of 116 N on the rope, what is the magnitude of the upward component ...
October 21, 2012

physics
A gazelle is running in a straight line (the x-axis). The graph in the figure (Figure 1) shows this animal's velocity as a function of time. During the first 12.0 , find the total distance moved
October 9, 2012

o Chem
The more nonpolar compound will have the higher retention time
October 9, 2012

Physics
A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...
October 5, 2012

Physics
A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.
October 5, 2012

Physics
The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental frequency? Answer in units ...
October 5, 2012

Physics
To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern has eight loops “...
October 5, 2012

Physics
Standing-wave vibrations are set up in a crystal goblet with four nodes and four antin- odes equally spaced around the 26.3 cm cir- cumference of its rim. If transverse waves move around the glass at 900 m/s, an opera singer would have to produce a high harmonic with what ...
October 5, 2012

Physics
The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.
October 5, 2012

Physics
A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.
October 5, 2012

Physics
A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...
October 1, 2012

Physics
explain Lambda? I was sick and missed class?
October 1, 2012

Physics
A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.
October 1, 2012

Physics
A pipe that is open at both ends has a fundamental frequency of 330 Hz when the speed of sound in air is 333 m/s. What is the length of this pipe? Answer in units of cm. What is the second harmonic? What is the third harmonic? Answer in units of Hz. What is the fundamental ...
October 1, 2012

Physics
The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength answer in m What is the fundamental frequency? Answer in units of Hz.
October 1, 2012

Physics
To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern has eight loops “...
October 1, 2012

Physics
A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.
October 1, 2012

Physics
The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.
October 1, 2012

Math
actually it is 1.25-.86
September 30, 2012

Math
How do i figure out this question? There are two roads, one has a grade of 20% the other has an elevation of 15 degrees. Which road would be steeper?
September 16, 2012

Math
One road has a grade of 20% and the other has an elevation of 15 degrees. Which road would be steeper? How do i figure this out?
September 13, 2012

math
thank you
September 13, 2012

math
A trucker is looking on a map of two roads he could take to get to Nelson. One has a grade of 20% and the other has an elevation of 15 degrees. Which road would be steeper? How do I figure this out?
September 13, 2012

physics
Two point charges are placed along a horizontal axis with the following values and positions: +3 µC at x = 0 cm and - 12 µC at x = 35 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one decimal place.
September 11, 2012

Physics
40 mph
September 6, 2012

com/155
what objecets,people,subject or concepts are you going to compare and or contrast?
August 16, 2012

math
what is (24 divide by 4)+(3 times 6 +4)
August 15, 2012

Physics
An ac generator supplies an rms voltage of 5.00 {\rm V} to an RL circuit. At a frequency of 21.0{\rm kHz} the rms current in the circuit is 45.0 {\rm mA}; at a frequency of 26.0{\rm kHz} the rms current is 40.0 {\rm mA}. Find value of L an R ?
July 30, 2012

com/155
Review the steps in the prewriting phase of essay writing. How important do you think prewriting is to the success of an essay? Can you skip the prewriting phase? Why or why not?
July 26, 2012

geometry
i got 56√90 but that's not one of the answer. The answers are 84√5 cm^3 168√10 cm^3 336√5 cm^3
July 25, 2012

geometry
Find the volume of a rectangular solid with the following dimensions: 2√3 cm x 7√5 cm x 4√6 cm.
July 25, 2012

compostition
I need a topic to Write a 150- to 200-word paragraph to explain how purpose, audience, tone, and content impact academic writing. Be sure to use the three components of a good paragraph covered in this weekâ??s readings. Underline the topic sentence and bold the ...
July 22, 2012

chemistry
How many moles of Ca(NO3)2 are needed to make 0.250 liters of a 0.200 M Calcium nitrate solution?
April 29, 2012

algebra
Joseph always throws change into a can and takes it out every two weeks. This time it is all nickels and dimes. There are six times as many dimes as nickels, and the value of the dimes is $4.95 more than the value of the nickels. How many nickels and dimes does Joseph have. (...
April 22, 2012

calculus
Let f be the function given by: f(x)=1/5x^5/2+x^-1/2, for all x in [1,4]. Find the length of the graph of f.
April 9, 2012

Math
A wire is stretched from the top of a 12-foot pole to a stake in the ground and then to the base of the pole. If a total of 20 feet of wire is needed, how far is the stake from the pole (the answer is NOT 16)
April 3, 2012

9th grade math
37 and 15
April 3, 2012

algebra
A man invested half of his money at 5%, one-third of his money at 4%, and the rest of his money at 5.5%. If his total investment income was $570, how much had he invested? and please show me the solution to solve this problem. thanx sorry bobpursly I cant understand your ...
February 25, 2012

algebra
A man invested half of his money at 5%, one-third of his money at 4%, and the rest of his money at 5.5%. If his total investment income was $570, how much had he invested? and please show me the solution to solve this problem. thanx
February 25, 2012

government
Which institution developed outside the limits of the written Constitution of the United States?
February 10, 2012

math
add 3yds, 16 inches,+ 6yds, 54 inches
January 31, 2012

algebra
the number of people the school can hold is at most 200. how can i present this in inequality is this correct x=<200
January 29, 2012

Statistics
D
January 18, 2012

physics
In an historical movie, two knights on horseback start from rest 90.6 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.340 m/s2, while Sir Alfred's has a magnitude of 0.346 m/s2. Relative to Sir George's ...
December 13, 2011

Math
Calculate the number of sides of a regular polygon whose interior angles are each 156 degrees.
December 4, 2011

trig
Try to draw an image of the ladder leaning against the wall. The diagram will look like a right abgled triangle. Now let the distance of the ladders base to the wall = x Cos 71 = x / 30 x = 30Cos71 x = 9.8
December 3, 2011

math
express as a single log: 1/2 log x + 3 log y - 4 log x =
November 5, 2011

Genetics
1) The F2 progeny from a cross exhibits a modified dihybrid ratio of 9:7 instead of 9:3:3:1. What phenotype ratio would be expected from a testcross of the F1 progeny? 2) In Drosophila, mutants a through g all have a white eye phenotype. The following data shows the results of...
September 16, 2011

math help
On a drive through Allegheny County Natalie drove due west for 9 miles, then turned left and proceeded to drive due south. After traveling 12 miles south, what was the straight line distance between where Natalie started and where she ended her drive?
August 29, 2011

algebra
55gj
August 22, 2011

physics
A 500g block is released from rest and slides down a frictionless track that begins 2m above the horizontal. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant of 20.0N/m. Find the maximum distance...
August 10, 2011

govt
I think pardoning a former senator
July 14, 2011

govt
Which act is an example of governor's use of legislative powers? a firing a parks commissioner b rejecting part of a recycling bill c pardoning a former senator d assessing flood-control efforts
July 14, 2011

govt
is it c
July 14, 2011

govt
In 21 states voters may propose and pass laws without the legislature a.by direct initiative b by indirect initiative c by optional referendum d by mandatory referendum
July 14, 2011

exp of math
add and simplify 96/125 + 83/125 + 2/15 =
July 14, 2011

math
A man is 67 7/18 taller than his son his son is 65 ¾ tall how much taller is the man?
July 14, 2011

algebra 2
Solve the problem. The profit made when t units are sold, t>, is given by P²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made). The future value of $6000 invested for 5 years at rate r, compounded annually, is given by S=6000(1+r...
July 6, 2011

algebra 2
Solve the problem. The profit made when t units are sold, t>, is given by P²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made). The future value of $6000 invested for 5 years at rate r, compounded annually, is given by S=6000(1+r...
July 6, 2011

college algebra
8 nickels 9 dimes
June 23, 2011

daycare
You've decided to operate a day care home. Which one of the following factors is the most important in helping you make your decision? A. Your family is willing to share their living space with the children in the program. B. Your home seems to be large enough. C. You find...
June 7, 2011

Math
2.9
May 29, 2011

geometry
How do you go about drawing a 1/4 mile running track?
May 18, 2011

math
solve the equation for x. write the solution set x2-100x=0
May 18, 2011

math
solve the equation for x. write the solution set . -x2 + 12x = 0
May 18, 2011

math
Solve the equation for x. Write the solution set -x(x + 8) = 0
May 17, 2011

math
Solve the equation for x. Write the solution set -4x + x2 – 9x + 6x = 0
May 17, 2011

intergrated math
Solve the equation for x. Write the solution set 3x2 + 5x2 – x – 7x2 = 0
May 17, 2011

intergrated math
Solve the equation for x. Write the solution set. 1. x(x – 2) = 0
May 17, 2011

Physics
How do you get these answers?
May 13, 2011

Calculus
Find the centroid of the region bounded by the curve sin x on the interval (0, pi) and the x-axis. Please help
May 12, 2011

Math
A bag contains forty coins, all of them either 2c or 5c coins. Let there be x 2c coins and y 5c coins. If the value of money in the bag is $1.55, find the number of each kind.
May 12, 2011

Science
What time of reactions is Silver + gold(III)> silver nitrate + gold
April 20, 2011

us history
list two reasons that stereotypes creted by propaganda may gave affected the deciosion to drop the atomic bomb on japan
April 19, 2011

us history
Explain why the U.S. supported a policy of the open door?
April 18, 2011

Physics
A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?
April 15, 2011

Algebra
Name the property shown by the following statement: 9x+0=9x?
April 8, 2011

math
because he wanted a potatoes chip
April 2, 2011

Analytic Goemetry
Find the equation of the parabola with axis parallel to the x-axis and passing through (3/2,1),(5,0) and (-1,2).
March 23, 2011

Analytic Goemetry
Find the equation of the parabola whose axis is horizontal, vertex on the y-axis and which passes through (2,4) and (8,-2).
March 23, 2011

calculus SIMPSON RULE
Use Simpson's Rule and all the data in the following table to estimate the value of the integral . x -16 -15 -14 -13 -12 -11 -10 y -8 9 4 9 -5 -9 3
March 14, 2011

college math
A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the total of 3 installments?
March 14, 2011

college math
Find the approximate (with an integral estimate) present and future values of a constant income stream of 2500 dollars per year over a period of 40 years, assume a 5 percent annual interest rate compounded continuously. Find current and future value?
March 14, 2011

college math
You won the lottery. They will pay you 1 million dollars a year for 20 years. Assuming 10 percent interest compounded continuously, approximate the present value of your winnings by assuming the money is paid to you continuously over the period of each of the 20 years and in ...
March 14, 2011

math college
A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the period of each year.
March 14, 2011

math
(a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.
March 14, 2011

math
(a). For any connected graph G, all internal nodes of the BFS tree on G have the same number of children. (b). For any connected graph G, the DFS tree on G and the BFS tree on G have the same number of edges.
March 14, 2011

math
Problem A: Let T be a balanced 5-ary tree with 81 nodes. (a). How many internal nodes does T have? (b). How many edges does the tree T have? (c). What is the height of T?
March 14, 2011

math
A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the period of each year.
March 14, 2011

Physical science
(A) A red light source and a green light source shine on a white screen. What color will the screen be? Explain your answer (B) if a blue object is aced in front of the screen, what color will it be? Explain your answer
March 14, 2011

Physical science
Two hunting forks are struck at the same time. One tuning fork has a frequency of 20 Hz while the second fork has a frequency of 226 Hz. How many beats will result?
March 14, 2011

Physical science
A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey stick?
March 14, 2011

physics
Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C
March 9, 2011

physics
How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?
March 9, 2011

Math
you put y on one side so its x=3-y then substitute that into the bottom equation. so you get 3(3-y)+2y=2 which is 9-3y+2y=2 then just solve for y. y=7
March 3, 2011

Semicolon
Marielle, the coordinator, was eager to begin the speeches, awards presentation, and banquet, but the guest speaker, who was flying to Chicago, had not arrived. Do I need a semicolon in this sentence?
February 14, 2011

statistics
115,200
February 3, 2011

chemistry
If you were given an unknown solution, write the steps that would be needed to prove that a solution contained phosphate.
January 5, 2011

chemistry
I am so confused GIVE ME THE ANSWER
December 14, 2010

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