Thursday

December 18, 2014

December 18, 2014

Total # Posts: 343

**PHYSICS**

2.- A man of 73 kg has a volume of 75 l, of which 5 l correspond to the lungs. (a) Calculate the volume of the lungs when going in apnea underwater to a depth of 10 m, assuming that the density of sea water is 103 kg/m3 . (b) At that depth, will the total forces acting on him ...
*December 11, 2014*

**band**

I need to label all my music notes correctly for the guitar and be able to find those notes on the guitar.I also need to tune my guitar with out a tuner.
*December 9, 2014*

**Algebra**

Well you see Bob, first you would use the commutative property and change it to some thing like this: (7.8* 800) *10 to the 12th= (7.8*80,000) *10 to the 10th.
*November 30, 2014*

**ph**

A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.0 m, 5.8 m) while a constant force acts on it. The force has magnitude 2.8 N and is directed at a counterclockwise angle of 100° from the positive ...
*November 29, 2014*

**eng**

google it
*November 27, 2014*

**eng**

what exactly does destiny mean and please don't tell me to google it because everytime i to, i keep getting confused. and also do u believe that destiny plays a role in our lives or no? and why?
*November 27, 2014*

**Physics**

Can someone, please help me out with this question. A uniform rectangular 91.21 kg refrigerator with height h = 2.069 m and width w = 1.153 m is pushed at a constant velocity across a level floor. The refrigerator is pushed in the horizontal direction halfway between the floor...
*November 6, 2014*

**physics**

If the mass of the skier is 50 kg, what is the magnitude of the force of kinetic friction on the skier? Be sure to show your work, and use g = 10 m/s^2 for the magnitude of acceleration due to gravity. Sin 30degrees = 1/2 Cos 30degrees = square root 3/4 Tan 30degrees = square ...
*October 27, 2014*

**Physics**

Displacement vector A with arrow points due east and has a magnitude of 2.62 km. Displacement vector B with arrow points due north and has a magnitude of 2.26 km. Displacement vector C with arrow points due west and has a magnitude of 1.4 km. Displacement vector D points due ...
*September 12, 2014*

**English**

Please help is this a good thesis? Students should not be required to wear uniforms in public schools , schools should focus more on education rather than what the student is wearing.
*July 23, 2014*

**Math Finance**

Word problem asks to find rate of interest on a monthly deposit for a sinking fund that is needed to produce 130,000 in 20 years. I applied the model, (fv/pv)^1/t -1 I use n/t if compounding yearly, quaterly, etc. No matter what I've tried I can't produce the interest ...
*July 3, 2014*

**physics**

a skater is sliding forward on a flat rink at 6 m/s. her mass is 71 kg. the sliding friction acting on her skate blade is 13.4 N acting backward. air resistance is 14.7 N acting backward. what is her horizontal acceleration?
*June 15, 2014*

**Englis**

remembered watching it the first time, and realizing I’d never seen anything like it, immediately vowed never to miss an episode of the Daily Show.
*June 10, 2014*

**Geometry**

Ann went on a 10 hour bicycle trip. The graph models the relationship between the time and the total distance traveled by Ann. The table shows selected points on the graph. T=0,1,4,7,10 d(t)=0,3,5,5,10 draw a graph of anns speed in mph in terms of the time in hours.
*May 27, 2014*

**geography**

5160
*May 20, 2014*

**Math economics HELP!!!**

Can someone please help me with a hint to solve this problem?? I'm struggling really hard with this. Thanks!!! "Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q^2. The aggregate demand in the market is given ...
*March 20, 2014*

**Math**

Chad buys peanuts in 2 pound bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2 pound bags of peanuts should Chad buy so that he can fill the 5/6 pound bags without having any peanuts left over?
*March 3, 2014*

**MATH **

A landowner wants to fence in a rectangular area of 75000 square metres and divide it into three parts with two parallel fences both parallel to one side of the rectangle. Each part will have a different grazing crop for the herds. What is the shortest total length of fence ...
*February 17, 2014*

**Math**

Put in order from least to greatest: 0.748 11/16 76%
*January 22, 2014*

**math**

on a scale of 2 inches = 3 feet what is the width ?
*January 1, 2014*

**English**

@Mia, for someone who is a story teller, you sure do know how to "spell" hahaha!
*November 16, 2013*

**math iv**

When the directions include the words "0 < Theta < 90" what type of problem does that infer?
*November 7, 2013*

**math**

Given ABCD with A = (1,1),B = (4, 2), C = (4, 5), and D = (1, 4),what are the coordinates for Point D' if the y-axis is the reflecting line?
*August 16, 2013*

**Math 17 Synthetic Division**

Using synthetic division, divide (x^6)(y^6) by x-y. please show the process. THANK YOU! :)
*July 9, 2013*

**Math 17**

What is the proof of theorem 2.23, where (b/a)+(d/c)=[(bc)+(ad)]/(ac). Thank you :)
*July 1, 2013*

**Statistics**

A study of 420,048 cell phone users found that 135 of them developed cancer of the brain or nervous system. prior to this study of cell phone use the rate of such cancer was found to be 0.0333% for those not using cell phones. Complete parts (a) and (b) a. use the sample data ...
*April 30, 2013*

**Statistics**

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: five percentage points; confidence level 90% from a prior study, ^p is estimated by the decimal equivalent 56% n= (Round up to the nearest integer)
*April 30, 2013*

**Statistics**

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.06; confidence level 90% ^p and ^q unknown n= (round up to the nearest integer)
*April 30, 2013*

**Statistics**

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n=500, x=350, 90% confidence ?<p<? (Round to three decimal places as needed.)
*April 30, 2013*

**Statistics **

Assume that a random sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. 95% confidence the sample size is 2096 of which 25%are successes The margin of E= (round to four decimal places ...
*April 30, 2013*

**Chemistry **

How many milliliters water are needed to make a 0.171 M solution that contains 1.00 g of NaCl?
*April 11, 2013*

**Chemistry**

Sketch the titration curve for the tirtation of (0.10M) HCl vs 25.0mL (0.50M) NaOH
*April 7, 2013*

**Chemistry**

What are the reducing agent and the oxidising agents in the synthesis of ammonia from hydrogen and nitrogen?
*March 29, 2013*

**physics**

Starting from rest, a 10.7 kg block slides 2.60 m down to the bottom of a frictionless ramp inclined 30.0° from the floor. The block then slides an additional 4.70 m along the floor before coming to a stop. (a) Determine the speed of the block at the bottom of the ramp. m/...
*March 26, 2013*

**Physics**

Two wires run from the top of a pole 2.6m tall that supports a volleyball net. The two wires are anchored to the ground 2.0m apart, and each is 2.0m from the pole. The tension in each wire is 100N. here are the dimensions. I do not understand how to setup work. if could show I...
*March 17, 2013*

**physics**

sorry distances are in meters and tension is in Newtons.
*March 17, 2013*

**physics**

Two wires run from the top of a pole 2.6 tall that supports a volleyball net. The two wires are anchored to the ground 2.0 apart, and each is 2.0 from the pole. The tension in each wire is 100. I do not understand how to setup work. if could show I would get better ...
*March 17, 2013*

**dynamics**

If it is released from rest at a height of h = 2 ft from the top of the uncompressed spring, determine the speed of the collar after it falls and compresses the spring 0.9ft .
*February 24, 2013*

**Finance**

Bond with $1000 par value and a contract interest rate of 10.8%. Bonds current market rate is $1123 and matures in 10 years. Marginal tax rate is 34%. What is the cost of capital from this bond debt?
*February 21, 2013*

**Chemistry- Naming compounds Nomenclature**

i am having trouble with this compound. Molybdenum (VI) Chromate I'm have it find its formula and can't seem to get it. Thanks for the help.
*February 19, 2013*

**physics**

A car is traveling at 25m/s when an accident occurs. The car decelerates 300m/s^2 but the passenger does not slow down because he is not wearing a seatbelt. a) Supposing the distance between the passenger and the dashboard is initially 0.50m, what will be the speed of the car ...
*February 10, 2013*

**Algebra**

Evaluate e^0.1 to four decimal places
*February 8, 2013*

**Chemistry**

You're right. My mistake! Thank you...
*January 11, 2013*

**Chemistry**

I have this question which I believe I solved correctly, but I was wondering if someone could look it over to make sure? The question is... Assay for Vitamin A (a fat soluble vitamin) required an extraction step into ether. In this assay, 2.00 mL of serum are extracted into 5....
*January 11, 2013*

**chemistry**

what is the balanced equation for the reaction of potassium dichromate and potassium hydrogen phthalate?
*January 10, 2013*

**Chemistry**

Use the data given below to construct a Born - Haber cycle to determine the electron affinity of Br? DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2 Br(g) 193 K(s) + 1/2 Br2(g) → KBr (s) -394 KBr(s) → K⁺(g) + Br⁻...
*December 8, 2012*

**calculus**

For y(x)=ln(3+x2), find y(6)
*November 19, 2012*

**physics 100**

What minimum speed does a 160 puck need to make it to the top of a 5.4 -long, 24 frictionless ramp?
*November 14, 2012*

**Lies**

unattractive
*November 13, 2012*

**Physics... Help!**

A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s...
*October 28, 2012*

**ALG 2!!!**

10x - 35 = 33 - 18x -12 28x = 56 x = 2
*October 28, 2012*

**Physics--Please Help!!**

A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s...
*October 28, 2012*

**Physics**

Also, for part C, do I do KE final minus KE initial? So 1/2(5.06)(75^2) - 1/2(0.06)(225^2) ?
*October 27, 2012*

**Physics**

I got 2.67 m/s from your equation. But the correct answer is supposed to be 3.6 m/s.
*October 27, 2012*

**Physics**

A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s...
*October 27, 2012*

**math**

kara needs 35 for an aquarium for 6 fish. how can she pay with the least ten and one dollar bills?
*October 11, 2012*

**physics**

A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 35 N. Starting from rest, the sled attains a speed of 2.1 m/s in 9.5 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.
*October 4, 2012*

**physics**

A person pulls a toboggan for a distance of 34.6 m along the snow with a rope directed 29.3 ° above the snow. The tension in the rope is 110 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension is directed ...
*October 4, 2012*

**Statistics**

hyu
*September 16, 2012*

**physics**

A lighthouse that rises 46.0 ft above the surface of the water sits on a rocky cliff that extends 19 ft out into the ocean from the base of the lighthouse. A sailor on the forward deck of a ship sights the top of the lighthouse at an angle of 25.0 degrees above the horizontal...
*September 9, 2012*

**math**

If JK=9x+11 and NO=28, what is the value of x
*September 4, 2012*

**Physics**

container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
*July 18, 2012*

**Science**

A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed to move the car a distance of 450 m at ...
*July 18, 2012*

**Physics**

A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00-kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.
*July 18, 2012*

**Physics**

container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
*July 18, 2012*

**Algebra**

I can not get he correct answer -10. -3/3{a+c(b+5)-(-6+a)} a=1, b=-6, c=-4
*June 26, 2012*

**Physics**

In this problem, your task is to analyze a lead balloon. The balloon in question is a hollow sphere of diameter of 20.0 m, constructed from a lead foil 0.25 mm thick and filled with helium gas. Below the balloon, a passenger basket is suspended. The mass of the passenger ...
*June 15, 2012*

**math**

in one elementary school class the following information on sports preferences was obtained: 7 liked tennis; 11 liked baseball; 9 liked soccer; 5 liked tennis and baseball; 3 liked baseball and soccer; 2 liked tennis and soccer; and 2 liked all three sports. How many students ...
*June 13, 2012*

**econimics**

Suppose that two people, Michelle and James each live alone in an isolated region. They each have the same resources available, and they grow potatoes and raise chickens. If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds of potatoes per year. ...
*June 9, 2012*

**math**

whats th eanswer to the math page. why do elephants have ivory tusks? and the answer to what can you use to tie up a spaceship?
*June 6, 2012*

**algebrA math**

factor 2 t^2+5t+2
*May 15, 2012*

**algebra math**

Factor the expression 6x – 54.
*May 15, 2012*

**geometry**

william wishes to carpet his rectangular5 patio, whose dimensions are 21 feet by 18 feet. How much will it cost William to cover his patio if the carpet costs $4.95 per square yard?
*May 3, 2012*

**math**

I dont know it doesnt say why
*April 18, 2012*

**math**

Lois wants to send a box of oranges to a friend by mail. The box of oranges cannot exceed a mass of 10 kg. If each orange has a mass of 200g, what is the maximum number she can send?
*April 18, 2012*

**math**

last week bre ran 28 miles more than heather. bre ran 35 miles. how many miles did heather run?
*March 25, 2012*

**math**

last week Ann ran 27 miles less than Jen. Ann ran 19 miles. How many miles did Jen run?
*March 25, 2012*

**geometry**

The perimeterof a square is 32 inches. Find the lenght of its diagonal. the answers should be in simplest form. make a sketch and show work.
*March 21, 2012*

**geometry**

a ladder is 15 ft long and is leaning against the wall. the top of the ladder is 12 feet above the ground. find the distance from the bottom of the ladder to the wall. draw and label a picture and show work....
*March 20, 2012*

**math**

Whats the volume
*March 14, 2012*

**math**

1/3bh of a pyramid...1/3(16)(6)
*March 14, 2012*

**math**

what is the lateral area of a regular pyramid with a base 6 and slant height 8?????????????
*March 14, 2012*

**math quick question**

I got a problem that states which graph represents the sequence of 1,2.5,4,5.5,7.. Should the graph start at 1,1 or 0,1?
*March 10, 2012*

**math please **

Which Represent the first two terms of the sequence a1=2 and an=-2(an-1)^2 2, -8 -8,-128 16,1024 -2,16
*March 10, 2012*

**geometry**

what is the ratio of 3ft 9in?
*March 9, 2012*

**math**

What is the value of the output for the function, g(c) = 19 c2, if the input is 4?
*March 1, 2012*

**Physics**

A mass of 2.2kg is placed on a stiff vertical spring which has a spring constant of 950n/m. The object is then pressed against the spring until it has been compressed a distance of 77cm. The mass is then released and is allowed to be thrown up into the air. How high in the ...
*February 25, 2012*

**Physics**

A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal, frictionless surface. What...
*February 25, 2012*

**Physics**

A box which has a mass of 14kg is sliding along a horizontal surface with a velocity of 18m/s when it encounters a frictionless inclined plane which meets the horizontal at an angle of 28 degrees. The box slides up the incline until it comes to a halt. How far up the incline ...
*February 25, 2012*

**Physics**

A 25kg crate is sitting at the bottom of an inclined plane. The inclined plane 12m long meets the horizontal at an angle of 15 degrees and has a coefficient of friction of 0.55. A force is applied to the crate so as to slide the crate up the incline at a constant speed. What ...
*February 25, 2012*

**College Geology**

assume that a particular radioactive-isotope has a half-life of 100 million years. Also assume that the parent isotope is incorporated into the minerals found in igneous rocks and that the only daughter atoms in the rock formed from the decay of the parent isotope. ...
*February 22, 2012*

**algebra**

2,968
*February 2, 2012*

**math**

6/14 Or 3/7 <--- Simplified
*February 2, 2012*

**Chemistry**

If you are using 5.25% (mass/mass) bleach solution and you determine that the density of the bleach solution is 1.08 g/mL, how many moles of sodium hypochlorite are present in a 4.00 mL sample?
*January 31, 2012*

**Chemistry**

If you are using 5.25% (mass/mass) bleach solution and you determine that the density of the bleach solution is 1.08 g/mL, how many moles of sodium hypochlorite are present in a 4.00 mL sample?
*January 31, 2012*

**APUSH**

The above answer in incorrect. Eventhough there was monopolies which were created by the govt. through loans, as all monopolies are created, thiis time period was an excellent one for the u.s.a Trists developed through innovation using the bessemer proccess and vertical and ...
*January 24, 2012*

**algebra**

find the LCM of 11(z-3)and 33(z-3)
*January 20, 2012*

**Algebra**

find the LCM of y^2+6y+9 and y^2+y-6
*January 20, 2012*

**Essay**

never mind!
*January 3, 2012*