Friday
November 28, 2014

Posts by Matt


Total # Posts: 1,912

math
A drawer contains 7 black socks, 5 white socks, and 3 brown socks. What is the probability that 2 white socks will be removed in succession?
March 1, 2011

physics
In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 1.65 m and cross the bar with a speed of 0.75 m/s?
March 1, 2011

Quantitative methods
Assignment Problem 1* Print Media Advertising (PMA) has been given a contract to market Buzz Cola via newspaper ads in a major southern newspaper. Full-page ads in the weekday editions (Monday through Saturday) cost $2000, whereas on Sunday a full-page ad costs $8000. Daily ...
February 27, 2011

Physics
What is the time lapse between seeing the lightning strick and hearing the thunder 17 km away
February 23, 2011

physics
A mass of 0.755 kg is attached to a horizontal spring of constant 403 N/m as shown. The system is compressed a distance xa = 20.8 cm from its equilibrium position and released from rest. The coefficient of friction on the surface is μ = 0.354. The mass comes to rest again...
February 23, 2011

Physics
emily, the question is 72 CM, not 72 meters. convert the 72cm into .72m. (mass) X (Speed)2/(distance .72) - (mass)(gravity) for the other other one add the two together.
February 22, 2011

Math
two people aged 15 and 50. At some point during their lives, the elder will be three times the age of the younger. Write an equation which models how old in years each will be when the elder will be three times as old as the younger person.
February 20, 2011

PHYSICS
A copper vat is 10 m long at room temperature (20 degrees C). How much longer it is when it contains boiling water at 1 atm pressure? Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy? A bottle containing 3 kg of water at a ...
February 17, 2011

Math
Determine whether u and v are orthogonal,parallel, or neither. u=-2i+j v=3i+6j
February 16, 2011

Math
An airplane has an airspeed of 724 kilometers per hour at a bearing of 30 degrees.The wind velocity is 32 kilometers per hour from the west. What are the groundspeed and the direction of the plane?
February 16, 2011

General Chemistry 1
If you heat copper sulfate pentahydrate to long or at too high of a temperature, what compound(s) is formed?
February 14, 2011

math 2
What is the scale factor for 1 inch = 20 feet?
February 10, 2011

Calc
derivative of (x^2+14)/x
February 8, 2011

Chemistry
the value 3.0x10^-5 was wrong for me?
February 8, 2011

Calculus-particle motion
1. A particle is moving on the x-axis (or any number line) Its position x(t), or distance from the origin, at the time t is given by x(t)=4t^3-16t^2+15t. t is greater than or equal to 0 a.) Where is the particle when it is at rest? b.) During what time interval is the particle...
February 7, 2011

Biology
In a cell undergoing meiosis, which sequence of events is shown in correct order? A. the cytoplasm divides, chromosomes line up at the equator, nuclear envelope forms. B. chromosomes become visible, chromosomes line up at the equator, chromosomes gather at the poles of the ...
February 4, 2011

Physics
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of the crate at the bottom of the ramp
February 3, 2011

Physics-Help Please!!!
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of th crate at the bottom of the ramp
February 3, 2011

Physics
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of th crate at the bottom of the ramp.
February 3, 2011

Physics
Marko 1.51^2 /g doesn't equal 2.2801g it equals 2.2801/g. So your answer is the reciprical of the right answer. Nice try though.
February 3, 2011

algebra
You have to subract the second equation from the first equation. Make sure to put the second equation in parenthases and distrbute the negative sign!
February 2, 2011

chemistry
An unknown metal will be used in this experiment. If you do not remove the moisture between trials houw would moisture effect the dendity in a graduated cylinder calculation?
January 31, 2011

Dynamics
Car A is moving at a constant speed Va=75 km/h, while car C is moving at a constant speed Vc=42 km/h on a circular exit ramp with radius p=80m. Determine the velocity and acceleration of C relative to A.
January 30, 2011

Calc
Suppose that a function f(125)=52 and f'(125)=4. Estimate f(123.5)
January 29, 2011

Calc
suppose that f(x) is a function of f(125)=52 and f'(125)=4. estimate f(123.5)
January 29, 2011

chemistry
How many molecules of ethane (C2H6) are present in 0.524 g of C2H6?
January 28, 2011

Biology
Which of the following statements about sexual and asexual reproduction is FALSE? A)Genetic diversity occurs in sexual reproduction. B)Asexually reproducing organisms can repair their own DNA. C)There are no special reproductive cells in asexual reproduction. D)A gametophyte ...
January 28, 2011

12th grade chemistry
If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)
January 27, 2011

math
a sum of 102,000 is to be split by 3 people, (1) gets 5 times as much as (2) which gets 2/5 as much as (3). how is this problem solved
January 26, 2011

Business
Hey guys. I really need your help picking out a new business name. Which do you like/find catchier??? The business is a local "swapping" online site. Thanks a lot. SwapEm Swap Ventures SwapEm Local
January 26, 2011

physics
Explain the effect increasing temperature has on the following situations and what is happening at the molecular level to cause it. (a) the speed of sound in air (b) the current in a wire THANKS
January 25, 2011

Calculus
find the limit of lim 7= as x approaches 8
January 24, 2011

math
where did you get the 2?
January 20, 2011

math
how do you find the square root of 49x^5?
January 20, 2011

science project
need to take an object from point a to point b and back to a and your only allowed to touch the project once to start. any ideas? No batteries, electric or blowing on it allowed. You can use water and magnets.
January 16, 2011

math
im pretty sure its 256. These r permutations right
January 13, 2011

math
mr. m has an 8 inch by 11 inch sheet of paper. He created a box by cutting congruent squares from each corner.The base of his box is 54 square inches.How much did he cut from each corner.
January 13, 2011

Science
nucleus
January 13, 2011

physics
A 1200 kg car is traveling at 45 km/h and hits a 1000 kg car parked on the edge of a 70 m deep canyon. What is the velocity of the two car wreck?
January 12, 2011

math
it is a typo the problem starts at the word Jocelyn
January 12, 2011

math
J1 3/4 Jocelyn is currently 1 3/4 feet taller that 2/3 her brother's height. If jocelyn is 4 1/2 feet tall then how tall is her brother jesse? How much taller is Jocelyn
January 12, 2011

Math
In a right triangle, if the median from the right angle to the hypotenuse is 5 in. what is the length of the hypotenuse?
January 11, 2011

9th grade alegbra
u^2-8=7u
January 11, 2011

PreCalc
That does not seem right to me because when i graph it, they turn out different.
January 10, 2011

PreCalc
Write the following expression as one logarithm: 2logx-log4-log3+logx. Simplify your answer.
January 10, 2011

Math
Make into one log function: 2logx-log4-log3+logx
January 10, 2011

Math
Make into one log function: 2logx-log4-log3+logx
January 10, 2011

Pre-Calc
Make into one log function: 2logx-log4-log3+logx
January 10, 2011

math
Make into one log function: 2logx-log4-log3+logx
January 10, 2011

Physics
An alpha particle (mass=6.68x10^-27kg)is emitted from a radioactive nucleus with an energy of 5.00MeV. How fast is the alpha particle moving in m/s? (1 MeV= 1.6x10^-13J). I dont know how to start to solve this problem A.2.40x10^7 m/s B.1.55x10^7 m/s C.3.70x10^6 m/s D.1.85x10^6...
January 10, 2011

math
a cab charges the following fare for ea. trip...first 1/4 mi $2.95 for every additional 1/4 mi or part $0.65 (a)what is the fare for a distance of 1 5/8 mi? my answer...I got $8.85 (b) what is the fare for a didtance of 10 3/4 mi? My answer...$30.25 (c)what is the possible ...
January 9, 2011

physics
if the length of a pendulum is 0.8m what is the period if the angular deflection is 30 degrees?
January 9, 2011

physics
a motorist runs out of gas and must push his 3000kg car across a flat road 200m to the gas station. ignoring friction how much work must be done in order to get the car to the gas pump? if the motorist accomplishes this in 10 minutes, how much power has he applied? what if the...
January 8, 2011

science
find a chart to help with blood types and rh. allele combinations
January 6, 2011

lgrammer
can you give me an example of a sentence with subject pronoun, action verb, adverb phrase, verb, subordinating conjunction, adverb, linking verb, subject, infinitive phrase?
January 6, 2011

math
f by 5ftind area of shaded rectangle to nrarest tenth. rectangle has circle in middle. the shaded area is 3ft
January 5, 2011

Physics
A 0.40-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3 m on a frictionless surface. If the cord will break when the tension in it exceeds 60 N, what is the maximum speed the ball can have? How would your answer be affected if there were ...
December 24, 2010

acc 225
An antique store has one employee who is given cash and sent to garage sales each weekend. The employee pays cash for any merchandise acquired that the antique store resells.
December 19, 2010

Calculus AB
A police car is chasing a suspect. The policemen is at point y=0.6 (north of an intersection) and the suspect is at point x=0.8 (east of the intersection). The police car is traveling at 60mph. Their radar gun reads that the suspect's car is getting away at a rate of 20mph...
December 16, 2010

5th grade
what is the magnitude estimate for 78.6 divided by 6
December 16, 2010

algebra
what did the beaver say to the tree? using only these letters egatkwolifunydcsmb. you may use these letters more than once
December 14, 2010

science
the temperture in which all motion of particles stop
December 13, 2010

5th grade
$12
December 13, 2010

Algebra-Did I even begin correctly?
Thank you
December 13, 2010

Algebra-Mathmate, Reiny or Dr. Bob-please double check-Did I even begin correctly?
Please check the above problem-Thank you
December 13, 2010

Algebra-Did I even begin correctly?
would 27/3^2 = 3 then in the equation so I would write it as log(6)3 Thanks for trying to help-I appreciate it-maybe I can repost for mathmate or Dr. Bob or Reiny
December 13, 2010

Algebra-Did I even begin correctly?
How would I write log(6)27-2log(6)3 as a single logarithm Would I start by getting rid of the (-2)- I know its the same log6 but what would I do with the 27 and the 3 I'm really confused on this one and I have to solve several similar ones with no clue on how to it-I'...
December 13, 2010

Algebra II
How would I write log(6)27-2log(6)3 as a single logarithm I'm confused on this one Thanks for any help you can provide
December 13, 2010

geometry
Given a circle with the radius of 2, which is the degree measure of an arc whose length is 1/2 pi?
December 10, 2010

SOCIAL STUDIES
What qualifications are needed for a country to become a world power?
December 9, 2010

Matth
Kenneth works for albertsons as a cashier. He earns $9.25 per hours and he works 20 hours each week. Write an expression that could be used to determine his total earnings for 1 year
December 7, 2010

MATH
I don't get it?
December 7, 2010

12U Physics
An object is moving down a ramp that has mu=0.150. It initially starts at (0,1), and the bottom of the ramp is at (sqrt(3),0) Show that the parametric down the ramp are given by: ht tp://img819.imageshack.us/img819/5993/screenhunter03dec061758.gif I know the kinematics ...
December 6, 2010

physics
thanks, that helped a lot!
December 6, 2010

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ...
December 6, 2010

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ...
December 6, 2010

college physics
9.5 cm
December 6, 2010

science
Tell Nartker that he's an ass
December 5, 2010

physics
A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.
December 5, 2010

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ...
December 5, 2010

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ...
December 5, 2010

Physics
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the ...
December 5, 2010

Physics
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire?
December 5, 2010

Calc
A wire 100 inches long is to be cut into two pieces. One of the pieces will be bent into the shape of a circle and the other into the shape of a equilateral triangle. How should the wire be cut so as to maximize the sum of the area of the areas of the circle and triangle will ...
December 2, 2010

Statistics
YES!
December 2, 2010

physics
heat transfer is what the problem is... you need the specfic heat of water (how water reacts to the increase of heat) or dw(t)/dh (change of water temp with respect to heat added) etc etc its calorie/gram °C = 4.186 joule/gram °C make sure the units are the same and ...
November 22, 2010

algebra
x = one hour thirty minutes?
November 22, 2010

Physics
sum of forces-> F=ma F(friction)= ufn* you don't need this F(applied)-F(friction)=ma f(a)-f(f)=ma f(a)/ma=f(f) add numbers
November 22, 2010

Grade 10 Math
-b over 2a to find x value for max and add that to the 3 metres
November 20, 2010

chemistry
A gaseous mixture contains 75 grams of N2 and 25 grams of Ar. What is the pressure due to Argon?
November 17, 2010

Honors PRE CALCULUS
Thanks so much! My teacher never gave is that equation. She just told us to go home and try to learn the method.
November 16, 2010

Honors PRE CALCULUS
Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
November 16, 2010

Honors PRE CALCULUS
Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
November 16, 2010

11th grade
Three different weights are suspended from three different springs. Each spring has an elasticity coefficient of 18.5. The equation for the vertical displacement is y= 1.5cosine(t times the square root of k/m), where t is time, k is the elasticity coefficient, and m is the ...
November 16, 2010

Chemistry
What is the structure of SN? I thought .:S=N:: or ::S=N:. but both were deemed wrong by the homework software we have... help!
November 9, 2010

math
how to devide 34/123.08
November 8, 2010

Physics HELP HELP
A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30° with its original direction of travel. (a) Find the angle between the velocity vectors...
November 8, 2010

Physics
61 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 29 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ...
November 7, 2010

Physics
A pitcher claims he can throw a 0.157 kg baseball with as much momentum as a 1.5 g bullet moving with a speed of 1.50 multiplied by 103 m/s. (a) What must the baseball's speed be if the pitcher's claim is valid? m/s (b) Which has greater kinetic energy, the ball or the...
November 6, 2010

Physics
Using P=(RnT)/V, where T=1(arbitrary constant), and R = 8.314: Calculate volume at initial condition. Use this volume and final pressure to calculate n final. Subtract n final from n inital.
November 5, 2010

Pages: <<Prev | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | Next>>

Search
Members