Tuesday
October 21, 2014

Posts by Joe


Total # Posts: 2,103

PHYSICS HELP
m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended...
November 6, 2011

physics
when a 2.50 kg object is hung vertically on a certain light spring described by hookes law the spring stretches 2.76 cm. A) what is the force constant of the spring. B) if the 2.50 kg object is removed how far will the spring strecth if a 1.25 kg block is hung on it. C) how ...
November 6, 2011

Algebra 3
Trying to solve this rational inequality but can't figure how to factor the numerator. ((3x-2x^2)/(4-x^2))<((3+x)/(2-x))
November 6, 2011

MGT 437
Which one of the following is not a project risk? a)Political Risk b) Department Risk c) Technical Risk d) Schedule Risk e) Production Risk
November 5, 2011

PHYSICS
m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended...
November 3, 2011

Math
Steve bought 300 shares stock for x dollars per share in 2008. This year he sold the stock for y dollars per share where y<x.He lost on the transaction. is wife Lisa used the formula (y-x)/x to compare the percent of loss. Steve said Lisa was incorrect because she didn'...
November 3, 2011

math
3
November 3, 2011

math
a phone company wants to create some new area codes. each area code will be 3 numbers . using the digits 1,5,and 7 only once in each code, how many codes can the phone company create?
November 3, 2011

Chem
In a coffee cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield the following reaction: Ag+ (aq) + Cl- (aq) -----------------> AgCl (s) The two solutions were initially at 22.60 °C, and the final temperature is 23.40 °C. Calculate...
November 2, 2011

physicss help!
m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended...
November 2, 2011

physics
m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended...
November 2, 2011

probability
carlos shoots a free throw in basketball, what are the chances of making a basket?
October 31, 2011

Algebra
84
October 31, 2011

Math
a=35 s=50
October 30, 2011

help! physics
it doesnt work can u help me?
October 29, 2011

help! physics
A 1.7 kg block is moved at constant speed over a surface for which the coefficient of kinetic friction is 0.27. The displacement is 2 m. It is pushed by a force directed at 25 degrees below the horizontal. Find the work done on the block by: the force. How do you find the ...
October 29, 2011

physics
ive been trying that but it doesnt work. for the force i get 4.96 and i find the work with that and its always wrong.
October 29, 2011

physics
A 1.7 kg block is moved at constant speed over a surface for which the coefficient of kinetic friction is 0.27. The displacement is 2 m. It is pushed by a force directed at 25 degrees below the horizontal. Find the work done on the block by: the force. How do you find the force?
October 29, 2011

alberga
60*6 DUH!
October 29, 2011

biology
what is the promoter sequence for transcription? in regards to nucleotides
October 28, 2011

biology
list two types of active transport that use specific protein recognition
October 28, 2011

math
5.06 and 5.94
October 25, 2011

comm 100
if you use literal analogies
October 25, 2011

algebra
The volume of a pyramid with a rectangular base is V= 1/3 x LWH Find W if V = 500, L = 15, and H = 4.
October 24, 2011

physics
there is a massless rope that is pulled over a frictionless pulley that is suspended high above the ground one end of the rope is tied to a heavy block with a mass of 483 kg the free end is climbed by a person with a mass of 102 kg who starts from rest. If during the time of ...
October 22, 2011

physics
At a track-and-field meet, the best long jump is measured as 8.00 m. The jumper took off at an angle of 46° to the horizontal. (a) What was the jumper’s initial speed? (Neglect air resistance.) 1 m/s (b) If there were another meet on the Moon and the same jumper could...
October 20, 2011

Physics
A car starts from rest and accelerates unifomly at 3m/s^2. A second car starts from rest 6 seconds later at the same point and accelerates uniformly at 5m/s^2. How long does it take the second car to over take the first car?
October 20, 2011

chemistry
S is Positive
October 18, 2011

Chemistry
What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?
October 13, 2011

geometry
in the diagram below of triangle abc, de is a midsegment of triangle abc, de=7, ab=10, and bc=13.find the perimeter
October 13, 2011

Science
how much heat is required to change 5 grams of iron to 10c
October 13, 2011

physics
Mars has a mass of about 6.8 × 1023 kg, and its moon Phobos has a mass of about 9.5 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.66 × 1015 N, how far apart are Mars and Phobos?
October 11, 2011

Math (Translate each sentance into a equation)
the product of Mike's age and 4 is 52
October 11, 2011

physics
ham
October 8, 2011

CIS 115
Can someone post an actual answer to this question either with paint or visual logic please?
October 8, 2011

trig
evaluate the expression below at t=4 p=$400 and r=-9% round youre answer 2 decimal place
October 7, 2011

ochem
at room temperature is caffeine soluble in water or dichloromethane
October 6, 2011

Calculus
If f(x)=[(x−1)/(1+5x)], there are two points on the graph of y=f(x) at which the tangent lines are parallel to the line x−2y=2. Type in the x values of these points. Type the smaller number first, then the larger number.
October 4, 2011

science
Tight junctions prevent the movement of the extracellular matrix between cells. A) True B) False Which one is it please :)
October 2, 2011

science
Tight junctions prevent the movement of the extracellular matrix between cells. A) True B) False Which one is it please :)
October 2, 2011

calculus
Piecewise f(x) = { (x^2, x<=2) (mx + b, x>2) I am not sure what the graph would look like for the 2nd function. Any tips on drawing functions like this would be of great help.
October 2, 2011

Statistics
what is the answer
October 1, 2011

chemistry
A foundry releases 6.0 tons of gas into the atmosphere every day. The gas mixture contains 2.5% sulfur dioxide (SO2) by wieght. How many pounds of SO2 are released in one week?
September 30, 2011

Physics
A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?
September 29, 2011

Physics
A 1596 kg car traveling at 24.91 m/s skids to a halt. What is the change in the combined thermal energy of the car and the road surface?
September 28, 2011

Physics
A 50 g ice cube can slide without friction up and down a 32° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.16 cm. The spring constant is 22 N/m. When the ice cube is released, what distance will it travel up the slope...
September 28, 2011

Physics
A 50 g ice cube can slide without friction up and down a 32° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.16 cm. The spring constant is 22 N/m. When the ice cube is released, what distance will it travel up the slope...
September 28, 2011

math
i need the right answer
September 28, 2011

math
what is 2+2 equal to?
September 28, 2011

Math 124
There are several ways you might think you could enter numbers in WebAssign, that would not be interpreted as numbers. N.B. There may be hints in RED!!! You cannot have commas in numbers. You cannot have a space in a number. You cannot substitute the letter O for zero or the ...
September 28, 2011

physics
Use kinematics to find the time it will take the rock to fall to the ground. (delta)x = V(initial)(time) + .5at^2 (delta)x = 0 + .5(-9.8)t^2 First term drops out because initial velocity is zero. Acceleration is that due to gravity. Negative sign is because it is accelerating ...
September 25, 2011

AP Physics
By Snell's law, n(incident)sin(theta(incident)) = n(refracted)sin(theta(refracted)) or n(1)sin(theta(1)) = n(2)sin(theta(2)) Solving for theta(2) sin(theta(2)) = [n(1)sin(theta(1))]/n(2) Theta(2) = arcsin [n(1)sin(theta(1))]/n(2) Theta(2) = arcsin ((1)(sin(33.5))/1.33 or ...
September 25, 2011

physics
some massive butt mud
September 21, 2011

math
john's high score on the asteroid game was 326,700. mike's high score was 418,200. rebecca just plated the game and her high score was halfway between john's and mike's. what was rebecca's score?
September 20, 2011

Spanish-another question please
Thank you for all your help
September 20, 2011

Spanish-another question please
1.If I had a picture of a family having fun in the snow-I'm not sure how to say that-- a.La familia divertirse en la nieve b.La familia se divertir en la nieve c.La familia diviertese en la nieve d.La familia se divierte en la nieve I think it is (a) 2. If a muchacho is ...
September 20, 2011

Spanish
Could you please check these -thank you 1.How do you say I am going to wake up early I think it is "Yo me voy a despertar temprano" 2. What is another way of saying "Voy a secarme el pelo. Is it "Me voy a secar el pello.
September 20, 2011

PHYSICS
a=3.14 rads
September 19, 2011

Physics
The acceleration due to gravity on the moon is about one sixth its value on earth. If a baseball reaches a height of 62 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m
September 17, 2011

algebra
you rent a car for $55.00 a day. .20 cents a mile , and you pay $80.00 at the end of the day. how many miles did you drive
September 15, 2011

statistics
You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.8. With water it will die with probability 0.4. You are 87 % certain the neighbor will remember to water the plant. You come back from the vacation and the...
September 14, 2011

Physics
A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 1.9 m above the ground.
September 13, 2011

math riddles for 7th grade
turdy truck
September 13, 2011

Chem 151
23, 54
September 13, 2011

Chem
A mass spectrum of phosporus atoms shows only a single peak at a mass of 31 what can you conclude from this observation?
September 10, 2011

psycology
nisa has grown up in a small villegein the foothills. There was no electricity and water had to be hand pumped.they seldom saw people from the outside.when she entered school the bus had to pick her up
September 10, 2011

Chemistry
Beryllium Chromate Pentahydrate
September 7, 2011

Chemistry
Use Boyles law P1V1 = P2V2 Answer 112 kPa (850)(x)=(1700)(56) <--- Equation
September 6, 2011

chemistry (please help)
Use density to find the mass Density * Volume = Mass of Coolant Make sure to convert 26.5 to ml or take 1.11 g/ml to 1.11 g/L.
September 6, 2011

algebra 1
Not DISTRIBUTE BUT ADD
September 6, 2011

algebra 1
Distribute the 5 9+105x
September 6, 2011

Math
Fair Coins*
September 6, 2011

Math
1. When four fan coins are flipped what is the probability of getting either exactly two heads of exactly two tails? 2. Solve for x 3x-x√3=-6 3. In the figure below ABCD is a rectangle and DE=DC. Given Ad= 5 and BE=3 find DE Thanks!
September 6, 2011

Bio
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?
September 6, 2011

arithmetic
What is the sum of the arithmetic sequence 22, 13, 4 … if there are 28 terms?
September 4, 2011

algebra
select T.branch_name from branch T, branch S where T.assets > S.assets and S.branch_city = "Brooklyn" Write an efficient relational algebra expression that is equivalent to this above query. Here is my answer: á T.branch_name (T.assets > S.assets v S....
August 30, 2011

math
select T.branch_name from branch T, branch S where T.assets > S.assets and S.branch_city = "Brooklyn" Write an efficient relational algebra expression that is equivalent to this query. Here is my answer: á T.branch_name (T.assets > S.assets v S....
August 29, 2011

Physics
A dog runs 50 m 30¢ª south of east and then turns and runs 75 m 45¢ª north of east. Determine the dog's resultant displacement
August 28, 2011

English
What is the meaning of validity, truth, and soundness as they relate to logical syllogisms
August 28, 2011

physics
9.4
August 23, 2011

Math
An angle θ, in standard position, has its terminal side in Quadrant IV on the line 12x + 5y = 0. Find the exact values of sin θ and cos θ.
August 16, 2011

math
write an inequality for the p (in dollars)described. Price start at $12.99
August 11, 2011

math
Suppose you have a 64 gigabyte flash storage system, with a 4096 byte page size. How big would the flash translation table be, assuming each page has a 32 bit address, and the table is stored as an array. I think the answer is 20 pages, does that sound about right?
August 5, 2011

Math
Can you get an answer?
August 5, 2011

Math
Find the quotient a^2x^3 + (5a^2b+ab)x^2 + (ab^3+5ab^2)x + b^4 divided by ax + b ^ symbolize power so a^2x^3 means a squared times x cubed.
August 5, 2011

math
I know its hard to see, but the triangle looks like this /_| with the legs on the right and bottom with the hypotenuse on the left. They give you y for the right leg and x for the bottom leg, no hypotneuse. o is the bottom right angle and a is the top right angle. So I dont ...
August 5, 2011

math
Given the triangle shown, describe the function values in term of hte triangle's two legs /| /a| y / | /o__| x Find: sec a Find: csc o
August 5, 2011

statistics
In a preliminary study, the sample standard deviation for the duration of a particular back pain suffered by patients was 18.0 months. How large a random sample is needed to construct a 90% confidence interval so that an estimate can be made within 2 months of the actual duratio
August 2, 2011

PreCalc - Sequence
A ball is dropped from a height of 20 ft and always rebounds 1/4 of the distance fallen. A. write a sequence for the first 3 rebound heights B. How high is the 6th rebound? C. Find the sum of all possible rebounds. I keep getting numbers that are too high. I don't think I ...
July 27, 2011

math
X+(1/6)=(1/3) get X by itself by subtracting 1/6th from both sides. x(+1/6)-(1/6)=(1/3)-(1/6) x=(1/3)-(1/6) x=(1/6) These operations of getting the variable(s) on one side will be the basis of many of your future calculations as you progress through mathematics.
July 27, 2011

math
help solve x + 1/6= 1/3 thanks
July 27, 2011

math
solve by substitution method. 5m+n=36 m-5n=54 the everton college store paid 1,859.00 for an order of 49 caculators the store paid 11.00 for each scientific calculator. the others ,all graphing caculators, cost the store 55.00 each. how many of each type of caculators was ...
July 24, 2011

Pre Cal/Vectors
Can someone show the steps involved in figuring out this type of problem? Given the magnitudes of vectors u and v and the angle Ό between them, find the magnitude of the sum u + v to the nearest tenth and the angle that the sum vector makes with u to the nearest degree. /...
July 24, 2011

Vectors
If /U/=9, /V/=11, and theta = 43 deg (angle between), find the magnitude of U+V and give the direction that the that the resultant makes with U.
July 24, 2011

structured query language math
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not use scalar subqueries...
July 23, 2011

math write in sql
Display the list of all departments, with the total number of instructors in each department, without using scalar subqueries. make sure to correctly handle departments with no instructors. Is this the right answer: select department.dept_name from department natural left ...
July 23, 2011

math write in sql
I have this question i need to know how to do for a test coming up this week. a)Display the list of all course sections offered in Spring 2010, along with the names of the instructors teaching the section. If a section has more than one instructor, it should appear as many ...
July 23, 2011

SQL
Im am running oracle. Here is what i have for the first query:select ID, name, from instructor natural left outer join section where sec_id >= 0.
July 22, 2011

SQL
This is a practice problem that the book has no answer for and needed to see how these two problems are done so i can be prepared for a test next week. The both need to be written in structured query langauge.
July 22, 2011

SQL
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not use scalar subqueries...
July 22, 2011

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