Saturday
July 26, 2014

Posts by JEFF


Total # Posts: 571

chemistry
Greg reacts 5.0 moles of hydrochloric acid(HCL)with 1.5 moles of barium hydroxide(Ba(OH)2).Which reagent is the limiting reagent, and which is in excess?If the reagent runs to completion,how many moles of barium chloride(BaCl2)will be produced? CAN SOMEONE PLEASE HELP ME.CHEMI...

Chemistry
Robby if you need more help,type ur question ino the search bar on your computor and a site titled chap15 fd.valenciacollege.edu will come up and it will break down complete indtructions on how to go about figuring out this question.I hope this helps.

math
Convert the 9m of cloth to cm = 900 cm to start with. She has 90 cm of cloth left so she used 900 cm - 90 cm = 810 cm of cloth Let X = cloth for tablecloth Let 2X = cloth for each cushion cover. The equation would be: 810 = X + 4 * 2x 810 = X + 8X 810 = 9X X=90cm 2X=2(90cm) = ...

math
$38.40 = (1-0.40)* Price Price = $38.40 = $64.00 ------- 0.6

math
BAD is correct. It is 84. If you would like to use algebra, do the following: x:= Unit Digit Number y:= Tens Digit Number The units digit is 4 less than the tens digit number so We know that x=y-4 The tens digit is twice the units digit so we know that y=2x Now we can take the...

Algebra
BTW Cassie, please please always remember that pi is simply a circle's circumference divided by it's diameter. For every circle, no matter the size... This is why it shows up in so many formulas for circles, cylinders, cones, etc.

Algebra
Reiny, Agreed, but that is what it appears to be using. I am guessing it was a software program and not the actual computer using that approximation. What really irks me about pi is that most people know it is 3.1415....., but have NO idea what it actually represents....

Algebra
You did the problem correctly. I am not sure how exactly you entered the numbers into the computer for pi, but it looks like with an answer of 24,523.71 the computer used an approzimation for pi based on the fraction 22/7. 22/7 = 3.142857.... If you plug the 22/7 instead of 3....

Algebra
The answer would then be C. 160 cm^3 The Volume of a cone is given by V=(1/3)*pi*r^2*h We know V= 540 cm^3 and that r=15 cm and can plug into the equation to find h. I am going to leave the units off, but you should include it in your work. 540=(1/3)*pi*(15)^2*h Solving for h ...

Algebra
Could Answer c be 160 cm^3 and not 16 cm^3?

math
She could actualy do it several different combinations. 5 quarters, 1 dime, and 10 nickels 4 quarters, 5 dimes, and 7 nickels 3 quarters, 9 dimes, and 4 nickels 2 quarters, 13 dimes, and 1 nickel

Math - Please Help
We know the formula for the Volume of a Right Circular Cone is given by V=(1/3)*pi*r^2*h V=140 in^3 The height of the cone = diameter of the base. The diameter = 2 times the radius, so h = 2r The formula for Volume can now be written as V=(1/3)*pi*r^2*(2r) which simplifies to ...

math
Sharon swims 1/4 of the total route Swim = (1/4)*TotRoute Sharon cycles 3/5 of the remaining route Cycles = (3/5)*(3/4)*TotRoute Notice the 3/4. If she swam 1/4 of the total route, 3/4 of the route remains for cycling and running. Sharon runs rest of the route Runs = (2/5)*(3/...

Lang. Arts
What do you learn from the dialogue between Mr. Frank and Miep at the beginning of Scene 1? A;Miep wants to show Mr. Frank something in the building. B;Mr. Frank wants to live in this building to hold on to his memories. C;The war has ended, but Mr. Frank does not want to rema...

Physics
Dave your dealing with Circular motion so you would use this circular motion formula;Ac=Vc2/r 1. In your problem your trying to find the radius. 2. The Ac is already given, but since the problem asks for it not to exceed 6.15 times the free-fall acceleration. You must times th...

MATH
The unit's digit for the number 7^76 is____ ?

math
Aliquot divisors are all the divisors of a number except the number itself. The product of the Aliquot divisors of a number is somtimes equal to the square of the number. The Aliquot divisors of of 12 are 1 ,2 ,3 ,4 ,6. Their product,1x2x3x4x6=144=12*2 is the smallest number w...

math
Since it's just a line, make an x y table of values, plot the points, and connect them with a line. Or you could use transformation rules by moving around the graph of y=x.

Science
If this is a physics question it might be that you should lose mass. Weight can change with location (weight is just the measure of gravity's pull) but mass does not.

Computers
Develop a use case diagram for a department store credit card system. Include at least two actors and four use cases.

Physics
A force of 44.0 N accelerates a 5.0-kg block at 6.3 m/s2 along a horizontal surface. (a) How large is the frictional force? (b) What is the coefficient of friction?

physics
Storms in the South Pacific can create waves that travel all the way to the California coast, which are 12,000 km away. How long does it take them if they travel at 15.0 m/s?

physics
It changed my theta sign to the è. But those are supposed to be theta.

physics
Consider the 620 N weight held by two cables shown below. The left-handed cable had tension 550 N and makes an angle of è with the wall. The right-hand cable had tension 670 N and makes an angle of è1 with the ceiling. a.) What is the ang...

physics
A 0.500 kg is thrown vertically upward from the ground with an initial speed of 12.0 m/s. Define the initial potential energy to be zero on the ground. What are the potential energy and kinetic energy of the ball at 2.50m above the initial position?

Physics
Two acrobats, each of 60.0 kg, launch themselves together from a swing holdings hands. Their velocity at launch was 8.00 m/s and the angle of their initial velocity relative to the horizontal was 46.0 degrees upwards. At the top of their trajectory, their act calls for them to...

Physics
The solid fuel of a 300.kg rocket travelling at 1.64x104 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. 10.00 kg of fuel is burnt in 15.00 s. If the exhaust velocity of the fuel, relative to the rocket, is 2.90x103 km/h, what is the acceleration of the...

Physics
A ballistic pendulum was a device used in the past century to measure the speed of bullets. The pendulum consists of a large block of wood suspended from long wires. Initially, the pendulum is at rest. The bullet strikes the block horizontally and remains stuck in it. The impa...

Physics
What would the weight of an object that is 4N on the earth be on the moon (acceleration due to gravity on the moon is 1.62m/s2?

Chemisttry
How would you make 0.1 N HCL using 12M HCL?

Physics
A dog throws a bone into the air at 17.2 m/s...How high will it rise and How long will it take to reach the peak of its trajectory?

physics
An F-14 jet fighter flies horizontally at 200m/s at an angle of 30 degrees above the horizon when it drops parcel from 2400m above the ground. a) How long does it take the parcel to hit the ground? b) How far does the parcel travel in the x-direction, from the time it is relea...

physics
A particle travels between two parallel vertical walls separated by 11 m. It moves toward the opposing wall at a constant rate of 5.2 m/s. It hits the opposite wall at the same height. The acceleration of gravity is 9.8 m/s2. a) What will be its speed when it hits the opposing...

chemistry
The speed of a substance is 13.056 m/s. What is the speed in cm/Ms??

algebra
Write an algebraic rule to describe the relationship in each table

Statistics
A sociologist is interested in the relations between x = number of job changes and y = annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information. x (Number of job chang...

Math
Jeff is changing the shape of his sandbox from 10 feet long by 12 feet wide to a square that has the same area. What is the perimeter of the square sandbox, rounded to the nearest hundredth?

statistics
the mean IQ of statistics teachers is greater than 110. write the existing state and alternative hypotheses.

statistics
how can you reword these research hypotheses to null hypotheses: a. smoking during pregnancy increases the risk of a child being born prematurely. b. regular exercise in older adults decreases blood pressure levels.

math statistics
create a null hypothesis on these research questions: a. what are the differences between emergency room shifts on medication errors? b. On a clinical trial of a new drug what will be the effects over a currently used drug?

algebra
I do not know where to start with this one. Suppose p varies directly as the square of z and inversely as r. If p = 32/5 when z = 4 and r = 10, find p when z = 3 and r = 36.

St. John
What is the greatest 7 digit number without repeating any digit

General Chemistry
substituting all values in the above discussion would yield 131.25 g/mol. This element is Xenon. :D

Social Studies
3. At the Constitutional Convention in Philadelphia, Madison drafted the plan presented by Virginia Governor Randolph, and William Patterson of _______ presented a plan that was similar to the Articles of Confederation. A. Pennsylvania B. South Carolina C. Massachusetts D. New...

Social Studies
3. At the Constitutional Convention in Philadelphia, Madison drafted the plan presented by Virginia Governor Randolph, and William Patterson of _______ presented a plan that was similar to the Articles of Confederation. A. Pennsylvania B. South Carolina C. Massachusetts D. New...

Chemistry
What mass of KClO3 must be decomposed to KCl and O2 to give 638ml O2 at 18 degrees Celcius and 752torr?

world geography
5. Medinas capture the unique historical character and social patterns of cities in North Africa and Southwest Asia. Labyrinths of winding alleys and many kinds of souks are typical features. What are souks? A. Sacred sites B. Ethnic quarters C. Bordellos D. Commercial areas

trig
solve equation for the exact solutions if possible put answer in degrees. 2tanx/3-tan^2x=1

math
is (0,4)a solution to y=6-2x?.Explain

math
Carlos hiked 1 and 3/4 miles along a nature trail to a fork in the trial. He than hiked 2 and 1/2 along a path that led to a waterfall. When carlos reached the waterfall, how far had he hiked altogether?

physics
AM radio signals are electromagnetic waves transmitted between frequencies of 550 kHz and 1600 kHz. Find the range of wavelengths for these signals. largest ___m smallest___m

Math
A simple dartboard has three areas the main board has a radius of 9 inches there is a circle with a radius of 5 inches ans the bullseye has a radius of 3 inches What is the proability of a random dart landing inside the bullseye Round to the nearest 1000th

physics please help!
thank you!

physics please help!
find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air

physics
Explain the Doppler Effect?

science
2. An electric fan having a radius of 0.5 m is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 83.8 rad/s in 17.5 s. the deceleration is 42.0 rad/s2. Determine a) The initial angular speed of the fan b) the linear speed of a point on...

math
solve each triangle. A=45,a=24,b=13

Chemistry
Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen

chemistry
complete KH2PO4(aq)+KOH(aq)

physics
On a wet racetrack, the maximum safe speed, to avoid sliding on a level circular curve with a radius of curvature of 56 m, is 73 km/hr. What is the coefficient of friction between the car's tires and the track surface?

Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a á= ______ and a corresponding Zá of ___

Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a á= ______ and a corresponding Zá of ___

chemistry
Calculate pH for strong base solution: 15.0 mL of 1.20×10^−2 M Ca(OH)2 diluted to 460.0 mL

Psychological Statistics
A random selection of files from a student counseling center revealed the following reasons why college students seek services: Mental health issues 25 Learning/school issues 15 Relationship issues 5 Other 5 What does it mean to say the files were randomly selected? How would ...

business mathematics
What is the cash discount and net amount paid if the gross amount of the invoice or freight paid is 7000$, freight charged is 100$, date of invoice is 4/8, terms of service is 2/10, n/60, and date of payment is 4/15?

Physics
A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For ea...

CHEMISTRY
DRAW LEWIS, KEKULE AND SKELETAL STRUCTURE OF: (CH3)2NCH2CH3

STADISTIC
Did you get this answer???

Physics
A 48 g ball is released from rest at h = 1.4 m above the bottom of the track shown in the figure below. It rolls down a straight 30° segment, then back up a parabolic segment whose shape is given by y = 1/4 x2, where x and y are in m. How high will the ball go on the right...

math
10

math
How many 4-digit numbers can be formed using the numbers 5, 6, 7 and 8? How many of the 4-digit numbers are less than 7000?

Chemistry
Nickel carbonyl has a formula: Ni(CO)4. Nickel carbonyl is produced by the reaction of solid nickel metal with carbon monoxide gas. 1. how do you write a balanced equation for this reaction? 2. How many liters of carbon monoxide gas must be provided to react with 5.00g of nick...

Chemistry
It does not have anything by the cc.

Math
What is the greatest odd number that uses digits 3, 4, 5 once each?

s.s
Ms. Sue, no offense, but stop making assumptions you can't justify. How do you know it's a wild-guess answer? That's insulting their intelligence.

Math/DataSets
I am looking for a good problem about data sets. Something along the lines of having to crtically look at a large chart of numbers and glean the appropriate ones. Make sense?

Calculus
If a_n does not equal zero for any n>=1 and ∑a_n converges absolutely, then ∑ 1/|a_n| diverges. The series are from n=1 to infinity. I think this is true but I'm not sure.

physics
In a movie a character jumps off a balcony at an angel of 25 degree 10 meters above the ground and land in a window that is 5 meters away and 9 meters above the ground. What is the intial velocity?

Spanish 9th grade
Is this how I say the spider is smaller than the lizard? La araña es más pequeña que la iguana.

math
80

Chemistry
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

Science
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

help please!:)
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

Physical Science
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

earth
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

chemistry
How many milliliters of a stock solution of 5.40 M HNO_3 would you have to use to prepare 0.150 L of 0.510 M HNO_3?

physics
Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.18 kg, the heavier box has a mass of 7.51 kg. (a) Find the contact force between these boxes when a horizontal force of 3.9 N is applied to the light box.

US history
Frank Steelman Office: Phone or Course Chat Office Hours: By appointment - as needed by the student. Phone: 609-204-0359

Programming Logic
Programmign Logic for business Modify the PROCESS routine in Section 5.4 to determine whether the student is full time or part time before checking whether he or she lives in district or out of district. Use a flowchart and pseudocode to show your solution. Here

INFORMATION SCIENCE
Modify the PROCESS routine in Section 5.4 to determine whether the student is full time or part time before checking whether he or she lives in district or out of district. Use a flowchart and pseudocode to show your solution. Here

Chemistry
Consider the following unbalanced reaction. P4(s) + F2(g)---> PF3(g) How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield? I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me a hand.

physics
A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms? The fishtank above measures 1 ft X 2 ft X 1 ft in English dimension...

physics
A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms?

chemistry
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

biology
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

physics
A rock is dropped from a 154-m-high cliff. How long does it take to fall (a) the first 77.0 m and (b) the second 77.0 m?

physics
A person is to run a circular track with a radius of 93 meters. The person starts at a certain spot and runs 3 and 1/2 times around the track in a time of 227 seconds. Find the magnitude of average velocity for this trip (|vav|) and find the average speed for this trip. Then s...

Henry3
What is it?

Henry3
Suppose someone invents a new unit of length called a zizzle. If 3.5 zizzles = 1 meter, what is 11.9 zizzles/s in km/hour?

physics
Which of the following equations is dimensionally consistent? A. a3 = 1.2 (v/t)3 + 0.2 x3/t6 + 1.5 v4/x3 B. a3 = 1.2 (v/t)3 + 0.2 x2/t6 +3 v6/x3 C. a3 = 1.2 (v/t)3 + 0.2 x3/t6 - 1.5 v6/x3 D. a3 = 1.5 (v/t)2 + 0.2 x3/t6 - 1.5 v6/x3

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