Tuesday
September 16, 2014

Posts by jason


Total # Posts: 1,090

physics
The equation of motion for an oscillator is given by y= (0.200cm)sin (140t). What are the 1)amplitude 2)period, and 3)frequency of this motion?
November 14, 2012

physics
The equation of motion for an oscillator is given by y= (0.200cm)sin (140t). What are the 1)alplitude, 2)period, and 3) frequency of this motion?
November 14, 2012

calculus
An auditorium with a flat floor has a large screen on one wall. The lower edge of the screen is 3 feet above eye level and the upper edge is 10 feet above eye level. Assume you walk away fron the screen at a rate of 3 ft/s while looking at the screen. What is the rate of ...
November 13, 2012

physics
Radio waves transmitted through space at 3.00¡¿10 8 m/s by the Voyager spacecraft have a wavelength of 0.120 m. What is their frequency?
November 13, 2012

physics
What is the wavelength of an earthquake that shakes you with a frequency of 10.0 Hz and gets to another city 84.0 km away in 12.0 s?
November 13, 2012

physics
Wind gusts create ripples on the ocean that have a wavelength of 5.00 cm and propagate at 2.00 m/s. What is their frequency?
November 13, 2012

Math
The El Paso Middle School girls' basketball team is going from El Paso to San Antonio for the Texas state championship game. The trip will be 560 miles. Their bus travels at an average of 60 miles per hour. Estimate the distance the bus travels in 2 hours.
October 28, 2012

math
solve for x e^(2x+3) -7 = 0
October 25, 2012

Chemistry
A sample of CO2 gas in a syringe has a volume of 25.0 mL at 20.0 ºC. If you warm the gas in your hand to 37 ºC, what will be the final volume?
October 25, 2012

physics
2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
October 23, 2012

Physics
2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
October 23, 2012

Physics
The gravitational field strenght on the moon is 1.63N/kg. If a rock on the moon weights 2000N, how much does the same rock weigh on the earth?
October 21, 2012

Math
how do you break apart arrays?
October 17, 2012

math
48
October 3, 2012

ant 101
A “hope chest” is a form of: (Points : 1) *brideprice. bridewealth. dowry. brideservice.
September 24, 2012

language arts
The italicized words are "Listening to the mix CD my brother made for me".
September 19, 2012

language arts
I believe its D.
September 19, 2012

math
andre drove part of a 260km trip at 80kph and the rest at 100kph. find the distance he traveled at 80kph if his total driving time was 2h 30min
September 17, 2012

math
my number is 5 more than one-half my number. What is my number?
September 17, 2012

plz help ms sue
the answers are 1. A 2.B 3.D 4.B hope this helps.
September 13, 2012

Math
#2 is wrong its b
September 13, 2012

physics
Acceleration is the change in velocity over time: Acceleration = (Final velocity - initial velocity)/time Since there are no directions involved, speed is used instead of velocity. So you know the initial speed: Initial speed = 53800 m/s And you know the final speed: Final ...
September 11, 2012

MATH
Just start at 2 and divide 255 which is (2^8)-1. 255/2 =127.5 Not divisible by 2. 255/3 = 85 We have one prime number, 3. 255/5 = 51 We have two prime numbers - 3,5. 255/7 = 36.43 Not divisible by 7 255/9 = 28.33 Not divisible by 9 255/11 = 23.18 Not divisible by 11 . . . 255/...
September 11, 2012

MATH
You have to break 1260 down into it's number tree. Start by dividing the number by 2 until you can't do it evenly, then divide by 3, and so on until no more divisions can be made: 1260/2 = 630 So we have one prime factor, 2 and are left with 630: 630/2 = 315 Now we ...
September 11, 2012

MATH URGENT
In either case though, you have to think. How many even or odd numbers are there between 1-100? The answer is 50. So in order to guarantee the removal of an even number 51 integers must be randomly removed.
September 11, 2012

MATH URGENT
You may have to clarify, do you mean how many times will this have to be done to guarantee the removal of an even or odd integer? Because just removing one integer guarantees the removal of an integer.
September 11, 2012

IPC
Again, we start with the question: What would the final speed of a car be after 5.0 seconds with a starting speed of 50 mi/hr? What is needed to solve this equation: Acceleration of the car. Yes that is all that is necessary. To find the acceleration, this is where the 0-60 mi...
September 11, 2012

physics
To answer this question first it helps to know the first ants speed as cm/s: 16 meters/second * 1000cm/m = 1600 cm/s Which means that the first ant will reach the end of the counter in .034 seconds. The second ant is traveling at 3.99999 cm/s which means it will reach the ...
September 11, 2012

Math
There is quite the easy shortcut for adding any set of numbers from 1 to whatever and that is this: (n(n+1))/2 So, let's say you wanted to find the sum of all numbers from 1 to 99. 99 will be n and so the equation will look like the following: (99(99+1))/2 Solve for the ...
September 11, 2012

IPC
You should approach this problem by gathering all of the information that is relevant to answering the question. The question is: Will the student make it to class in 5 seconds? What is needed to answer this question? Velocity of the student, and distance to the class room. ...
September 11, 2012

chemistry
Molality id defined as (moles of a solute)/(kg of solvent). So the concentration of Ca in the river water would be (13.4 mg/kg) * (1/1000 g/mg) * (1/40.078 mol/g) = 3.34 x 10^-4 mol/kg The key to solving any concentration problem is knowing what units you're starting with ...
September 11, 2012

college biology
If someone has abnormally low cholesterol levels then perhaps it is being consumed by processes that need cholesterol faster than it is being synthesized or brought in through the diet. Perhaps excess bile production, inability to use dietary cholesterol, excess steroid ...
September 11, 2012

Chemistry
A solution is made by dissolving 1.0 mole of Na2SO4(ionic compound) into water to get 1.0L of solution. Give the conc of all the ions present in solution in M?
September 5, 2012

Math
1. x/4 + 11 = -25 2. x/4 - 5 = 13 3. x/4 = 13
September 4, 2012

chems
A cubic piece of metal measures 7.50cm on each edge. If the metal is nickel, whose density is 8.90 {\rm g/cm}^3, what is the mass of the cube?
September 3, 2012

algebra
Briana's second test score was 8 points higher than her first score. Her third score was 88. She had a B average (between 80 and 89 inclusive) for three tests. What can you conclude about her first test score?
September 3, 2012

Chemistry
How do I calculated the mass and moles of nitric acids when only given 2ml of concentrate nitric acid
August 30, 2012

Math
The half-life of radioactive strontium-90 is approximately 28 years. In 1962, radioactive strontium-90 was released into the atmosphere during testing of nuclear weapons, and was absorbed into people's bones. How many years does it take until only 6 percent of the original...
August 28, 2012

physics
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.7 m/s. The car is a distance d away. The bear is 27 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely. What is the maximum possible value for d?
August 23, 2012

physics
What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 6.8 m/s when going down a slope for 2.5 s?
August 23, 2012

Physics
A block of mass m 1 sits at rest on a table over a hole in the table. From below the table, a bullet of mass m 2 is fired vertically upwards into the block. The bullet imbeds itself in the block. The block and bullet rise to a maximum height h. What is the bullet’s ...
August 6, 2012

Differential Equations
Solve the differential equation below with initial conditions. Compute the first 6 coefficient. Find the general pattern. (1-x)y"-y'+xy=0 y(0)=1, y'(0)=1
July 9, 2012

Math
Find the balance in the account. $2,500 principal earning 4%, compounded quarterly, after 4 years
July 8, 2012

Chemistry
You mix 19.5 gallons of a mixture containing 12 wt% NaCl (sol'n density = 1.0837 g/cm^3) with V2-gallon sol'n that is 20 wt% NaCl (sol'n density = 1.1453 g/cm^3). Needed mixture is 19 wt% NaCl Whats the V2 in gallons? (all solutions are in water so just dealing ...
July 7, 2012

chemistry
How many milliliters of 0.237 M HCl are needed to react with 52.2g of CaCO3? 2HCl(aq) + CaCO3(s) --> CaCl2(aq) + CO2(g) + H2O(l)
July 6, 2012

math
five rental cars require four new tires. the price of one new tire is $84. what would be the total cost including 7% tax for new tires for all five cars?
July 5, 2012

math
what is the simple interest of $1500.00 for 4 months at 63/4% annual interest?
July 5, 2012

math
4(2x + 3x)=30, solve for x
July 5, 2012

math
a parking lot charges 1.50 for the first hour of parking and 55 cents for each additional half hour. How much would it cost to park a car from 12:45 pm to 6:15 pm
July 5, 2012

math
If a contractor pays an average wage of $20.00 per hour and wants to make a 15% mark-up on the cost of labour, what will the contractor charge as an average labour cost on contracts?
July 5, 2012

math
A rectangular school yard 280 m by 245 m is to be fenced. How many metres of fencing will be required to fence it completely?
July 5, 2012

Physics calculus based
Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane at a position given by (x, y) with a velocity given by (vx, vy). [DATA: (x, y) = (3.3, 5.2) ×10^11 m; (vx, vy) = (-6.1, -4.0) ×10^3 m/s.] (A) What will ...
June 19, 2012

Physics HELP
An ultrasound transducer used to measure the speed of blood cells is oriented at an angle of 45 degrees to the direction of the blood flow. if the frequency of the sound emitted by the transducer is 1.5 Mhz and the doppler shift is 268Hz, calculate the speed of blood cells. ...
June 15, 2012

Math (Probability)
Hassan has a bag which contains 20 coloured discs. He randomly chose three discs from the bag and found that two were red and one was white. a) Based on this sample, how many of each coloured disc are in the bag? b) Hassan returned the three discs to the bag and then randomly ...
June 10, 2012

Physics
A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.
June 7, 2012

business
Most are wrong.
June 6, 2012

math
I wanna say 433 seats? but idk if i did that correctly...?
May 22, 2012

math
another type of percents im havin trouble with, i know im close to figuring it out but cant quite get there... "there were 130 people in a school auditorium to listen to a political candidate. This reprsents 33 1/3% of the capacity of the auditorium. How many seats are in...
May 22, 2012

math
how did u turn 33 1/3% into decimal? and how would I solve 0.3333333x = 130? And i rly do appreciate the help, have a huge test in the morning
May 22, 2012

math
another type of percents im havin trouble with, i know im close to figuring it out but cant quite get there... "there were 130 people in a school auditorium to listen to a political candidate. This reprsents 33 1/3% of the capacity of the auditorium. How many seats are in...
May 22, 2012

math
Thanks :D i knew it was 30, just wasn't sure how to get to the answer :D
May 22, 2012

math
Lois got 27 problems right on a math test. If this is 90% of the test, how many problems were on the test?
May 22, 2012

math
On a loan of $3,500, Manny had to pay $280 interest. The Interest was what percent of Manny's loan?
May 22, 2012

Math
Mr Gopal left 3/10 of his fortune to his wife. Of the remainder, 1/10 was donated to charity and the rest was distributed among his 4 children , A , B , C and D in the ratio of 4:3:3:2 . If $63000 was given to charity, calculate (a)the amount received by A (b)the total fortune...
May 18, 2012

Physics
When light of wavelength 391 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.72 eV. 1) What is the cutoff wavelength of potassium? Answer in units of nm 2)What is the threshold frequency for potassium? Answer in units of Hz ...
May 11, 2012

Algebra 2
Evaluate little 9 C little 9
May 11, 2012

english
Yeah, I've googled for ideas already, but most of them are the same controversial topics.
May 10, 2012

english
What is a good non-controversial topic for a senior research powerpoint? I need to do a research presentation answering a question (thesis). The rules are pretty lenient, so it can be about almost anything but there must be citations from books and articles. It can be ...
May 10, 2012

PHYSICS Help please!!
The two-mile linear accelerator at Stanford University in California "appears" to be less than a meter long to the electrons that travel in it. Explain.
May 9, 2012

chemistry
how much heat is needed to convert 30 g of water at 10 C to 110 C
May 3, 2012

math
Expand as a binomial series and simplify (2x + y^3)^5
May 2, 2012

math
Simplify the following expression 8!/4!
April 30, 2012

physics
That makes so much more sense! Thanks so much!!!
April 22, 2012

physics
It was wrong and I still dont get how to do it!
April 22, 2012

physics
Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.
April 22, 2012

physics help!
Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.
April 22, 2012

physics
The Kâ characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units. (a) joules (b) electron volts
April 22, 2012

physics
A particle has a de Broglie wavelength of 3.30 10-10 m. Then its kinetic energy quadruples. What is the particle's new de Broglie wavelength, assuming that relativistic effects can be ignored?
April 22, 2012

physics
The Kâ characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units. (a) joules (b) electron volts
April 22, 2012

change decimal to fraction
0.31 as a fraction idk
April 18, 2012

Calculus, Related Rates
A particle at point A is 50 mm away from a second particle at point B. The first particle is moving toward point B at a constant rate and the second particle is moving at a right angle to the line AB at a rate that is 1/3 of the rate of the first particle. The particles get ...
April 17, 2012

Statistics
A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $100 of the true mean. The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required ...
April 15, 2012

Lab Math/Statistics
The 95% confidence interval for a quality control specimen is 9.2-10.2 mg/dl. My question is, how do I figure out the coefficient of variation (%CV) with only this information?
April 13, 2012

Math
How would I determine if a set of numbers if Gaussian or non Gaussian?
April 13, 2012

Phys
What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?
April 12, 2012

crjs101
how to present the processing requirements and the mandated pretrial measures required by law.
April 11, 2012

physics
Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
April 11, 2012

chemistry
Bill prepared 5.00-mL of borax solution at 59.2degrees C. He diluted the solution in an Erlenmeyer flask and titrated it to an endpoint with 27.05 mL of 0.500 M HCl. What is the saturation concentration of borate ions? I don't know what to do here. Does it involve a Ksp? ...
April 9, 2012

Math
Given P(x) = x^3 - 3x^2 - 5x + 10 a evaluate P9x) for each integer value of x from -3 through 5 b. Find all zeros of P(x) d. Prove that 5 is an upper bound on the zeros of P(x)
April 9, 2012

Algebra
solve: (1/(x-10)+(1/20)=(1/(20(x^2-100))
April 8, 2012

Algebra
((k^2+6k+9)/(k^2+12k+27))×(k^2+9)/((k^2+12k+27)) express in lowest terms
April 7, 2012

Interediate algebra
if f varies jointly as q^2 and h, and if f = 72 when q = 3 and h = 4, find h when f = 48 and q = 2
April 7, 2012

Government
In which type of colony did strict governors anger the colonists?
April 3, 2012

english
k and what about the others?
April 3, 2012

english
alright and 4) the infinitive phrase is a adverb?
April 3, 2012

english
the infinitive phrase in number 5)a noun?
April 3, 2012

english
i don't know how to identify the infinitive phase
April 3, 2012

english
what is the function of the italicized infinitive phrase in these sentences? 1)May I have permission to use the car tonight? 2)He went to Europe to study architecture. 3)Can you give me a place to put my things? 4)I want to go with you to the store. 5)To help you is my ...
April 3, 2012

english
k
April 3, 2012

english
cause i don't know this stuff that much
April 3, 2012

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