# Jessi

Most popular questions and responses by Jessi-
## physics

A cylinder that has a 40.0 cm radius and is 50.0 cm deep is filled with air at 20.0°C and 1.00 atm. A 21.0 kg piston is now lowered into the cylinder, compressing the air trapped inside. Finally, a 79.0 kg man stands on the piston, further compressing the

*asked on August 23, 2009* -
## physics

Water falls without splashing at a rate of 0.220 L/s from a height of 2.20 m into a 0.720 kg bucket on a scale. If the bucket is originally empty, what does the scale read 3.20 s after water starts to accumulate in it? The answer is supposed to be in

*asked on March 22, 2009* -
## math

There are 32 more apples than oranges in a box. 3/5 of the oranges and 1/3 of the apples are overripe. If the number of overripe apples and the number of overripe oranges are the same, how many pieces of overripe fruit are there?

*asked on March 21, 2015* -
## math

if a gardener fences in the total rectangular area shown in the illustration instead of just the square area,he will need twice as much fencing to enclose the garden.how much fencing will he need ?

*asked on September 26, 2013* -
## math

A certain sum of money was shared among 3 friends, A, B, and C. A received 3/7 of the money, and B got 2/3 as much as A. C received $49 less than A. a) Find the ratio of B’s money to C’s money. b) How much money did C receive?

*asked on May 5, 2015* -
## physics

A potential energy function for a two-dimensional force is of the form U = 3 x2y - 6 x. Find the force that acts at the point (x, y). (Use x and y as appropriate.)

*asked on February 24, 2009* -
## math

3/5 of the people at a funfair were children. 3/4 of the remaining people were men. There were 140 more children than women. How many people went to the funfair?

*asked on March 14, 2015* -
## physics

A small bead of mass m is carried by a circular hoop of radius r which rotates about a fixed vertical axis. Show how one might determine the angular speed w of the hoop by observing the angle theta which locates the bead. Theta is measured to the right of

*asked on October 31, 2009* -
## Physics! plese help

A 1320-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

*asked on June 7, 2012* -
## physics

A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to

*asked on March 2, 2009* -
## physics

A light spring with force constant 3.85 N/m is compressed by 5.00 cm as it is held between a 0.250 kg block on the left and a 0.500 kg block on the right, both resting on a horizontal surface. The spring exerts a force on each block, tending to push them

*asked on February 24, 2009* -
## Chemistry

A 200 mg/dl solution was diluted 1:10. This diluted solution was then additionally diluted 1:5. What us the concentration of the final dilution?

*asked on March 24, 2009* -
## Math

What is the formula for trigonometry?

*asked on April 15, 2019* -
## Physics

A piece of putty is initially located at point A on the rim of a grinding wheel rotating about a horizontal axis. The putty is dislodged from point A when the diameter through A is horizontal. The putty then rises vertically and returns to A the instant

*asked on February 17, 2009* -
## personl finance

Bill Mason is considering two job offers. Job 1 pays a salary of $43,300 with $5,310 of nontaxable employee benefits. Job 2 pays a salary of $40,500 and $6,380 of nontaxable benefits. Use a 20 percent tax rate.

*asked on June 13, 2012* -
## physics

An amusement park ride consists of a large vertical cylinder that spins around its axis fast enough such that any person inside is held up against the wall when the floor drops away. The coefficient of static friction between person and wall is µs, and

*asked on February 17, 2009* -
## physics

A car is traveling at a constant initial velocity of 100km/h on a level portion of road. It encounters a 6 percent incline (tan(theta)= 6/100) at point A and the car decelerates at a constant rate of gsin(theta). Find the speed of the car (a) 10 seconds

*asked on October 4, 2009* -
## math

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a.Find the ratio of red markers to blue markers to green markers. b.When 6 red markers

*asked on March 20, 2015* -
## Physics

Q has a negative charge and is equal to -7.5. It's equidistant from both q1 and q2. q1 is 10 cm away from Q and q2 is 10 cm away from Q. In order for static equilibrium to occur, what charge will q1 and q2 have to be? I was thinking that it would be

*asked on February 3, 2019* -
## Physics

Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.9x10-8m, and a tangential speed at the rim of 2.5x10-5 m/s. (a) What is the angular speed (the magnitude

*asked on June 7, 2012* -
## math

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a.Find the ratio of red markers to blue markers to green markers. b.When 6 red markers

*asked on March 21, 2015* -
## chemistry

5.00g aluminum sulfide and 10.0g water react according to the reaction: Al2S3 + 6 H2O -> 2 Al(OH)3 + 3 H2S What is maximum mass of H2S that can be formed? What mass of excess reactant remains when the reaction is complete?

*asked on October 12, 2014* -
## physics

A test car starts out from rest on a horizontal circular track of 80m radius and increases it's speed at a uniform rate to reach 27.78 m/s in 10s. Find the magnitude of the total acceleration of the car 8s after the start. Ok so I know that the total

*asked on October 9, 2009* -
## Chemistry

One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.

*asked on March 24, 2009* -
## Chemistry

How many milliliters of glacial acetic acid are needed to prepare 2.0 L of 10.0% volume/volume acetic acid?

*asked on March 25, 2009* -
## Chemistry

One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.

*asked on March 24, 2009* -
## Physics

A 120-V motor has mechanical power output of 2.00 hp. It is 82.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (b) Find the energy delivered to the motor by electrical

*asked on October 18, 2009* -
## physics

A block of unknown mass is attached to a spring with a spring constant of 6.00 N/m and undergoes simple harmonic motion with an amplitude of 12.0 cm. When the block is halfway between its equilibrium position and the end point, its speed is measured to be

*asked on April 27, 2009* -
## algebra

One side of a rectangle is 12 inches, and the other side is x inches.What values of x will make the perimeter at most 44 inches?

*asked on February 3, 2011* -
## Alebra

Solve 5m - 8 > 12 Solve 12 - 3a > 18 Solve 5m - 4 < 2m + 11 Solve 2r - 18 ≤ 5r + 3 Solve 26p - 20 > 14p + 64 Can someone give me an example to one of these? I don't know how to do these.

*asked on December 19, 2016* -
## Social Studies

11. What was significant about the role of the Green Mountain Boys?

*asked on October 19, 2016* -
## AP World History

What are the effects of cultural diffusion in the Mediterranean? (I couldn't find the answer in my text book, the only thing I got was that the Mediterranean was able to adopt Greek culture.) Thank You Very Much!!

*asked on October 26, 2014* -
## physics

Upon its return voyage from a space mission, the spacecraft has a velocity of 24000km/h at point A, which is 7000km from the center of the earth. Determine the velocity of the spacecraft when it reaches point B, which is 6500km from the center of the

*asked on November 6, 2009* -
## Biology

What role does the environment play in convergent evolution?

*asked on November 20, 2012* -
## physics

In the design of a control mechanism, the vertical slotted guide is moving with a constant velocity x'= 15in/s during the interval of motion from x= -8in to x= +8in. For the instant when x= 6in calculate the n- and t-components of acceleration of the pin

*asked on October 11, 2009* -
## Chemistry

How many grams of NaCL are required to make 250ml of a 0.4M solution?

*asked on April 21, 2009* -
## Cost Accounting

Katherine Company's Sales Budget Has The Following Unit Sales Projection For Each Quarter Of The Calendar Year 2009. January -March 540,000 April-June 680,000 July-September 490,000 October-December 550,000 Total 2,260,000 Sales for the first quarter of

*asked on November 7, 2009* -
## physics

A particle is released on the smooth inside wall of a cylindrical tank at A with a velocity v which makes an angle beta with the horizontal tangent. When the particle reaches a point B a distance h below A, determine the expression for the angle theta made

*asked on November 7, 2009* -
## Calculus

Comute f(x) of a) f(x) = sinxcosx / sinx + cosx b) f(x) = (1-x^2) / (1+x+x^2) c) f(x) = x^7 secx

*asked on February 3, 2017* -
## math

At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the beginning?

*asked on March 3, 2015* -
## PLEASE HELP ME!!!

CAN YOU HELP ME PLEASE UNRGENTLY NEEDED.THANKS FOR HELPING ME TO GET SOME ANSWERS FOR THIS QUESTION BELOW. 1. SOME VALLEYS WERE NOT ERODED BY THE RIVERS FLOWING IN THEM.VALLEYS CAN BE FORMED BY FAULTING AND GLACIAL EROSION. WHAT FEATURES COULD YOU LOOK FOR

*asked on April 25, 2012* -
## science

Can you help me balance some equations? I tried and failed several times... 1. calcium hydroxide + phosphoric acid yield calcium phosphate + water 2. copper + sulfuric acid yield copper(II) Sulfate + water + sulfur dioxide 3. hydrogen + nitrogen monoxide

*asked on November 10, 2009* -
## Geometry

I need help asap please Which figure above, if any, is topologically equivalent to the given figure? Identify the topologically equivalent figure by letter. A pretzel a.pencil b.pipe, c.trophy

*asked on September 13, 2009* -
## physics

A loaded ore car has a mass of 935 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 26.0° above the horizontal. The car accelerates uniformly to a

*asked on March 2, 2009* -
## Math

Ms. Snyder wants to buy a television at an electronics store. All televisions at the store are 3/4 of the original price, p. She has a $40 discount coupon she will use during the sale. What equation should Ms. Snyder use to find the final price, f, of a

*asked on February 25, 2009* -
## Kinesiology

Joey weighs 77 lb and sits on a seesaw at a distance of 30 inches from the fulcrum. Jenny weighs 67 lb and sits on the opposite side of the seesaw at a distance of 48 inches from the fulcrum. Mikey weighs 30 lb and wants to play but doesn’t know where to

*asked on December 5, 2010* -
## Chemistry

What is the molarity of a solution prepared by diluting 100g of NaH2PO4 to 1L?

*asked on April 21, 2009* -
## Chemistry

How many milliliters of a 2000.0 mg/dl stock solution are needed to prepare 100.0 ml of a 150.0 mg/dl working solution?

*asked on April 14, 2009* -
## physics

An 6.00 g bullet is fired into a 2.30 kg block initially at rest at the edge of a frictionless table of height 1.00 m. The bullet remains in the block, and after impact the block lands 2.00 m from the bottom of the table. Determine the initial speed of the

*asked on March 24, 2009* -
## Math

How many horizontal tangents does the graph of f(x)=(x-1)^2(x-3)^2 have? f(x)=(x-1)^2(x-3)^2 =2(x-1)(1)+2(x-3)(1) =2x-2+2x-6 f'(x)=4x-8 0=4x-8 =4(x-2) x=2 Therefore it only has 1 horizontal tangents?

*asked on February 18, 2012* -
## physics

Each of the four wheels of the vehicle weighs 40 lb and is mounted on a 4in diameter journal. The total weight of the vehicle is 960 lb, including wheels, and is distributed equally on all four wheels. If a force P = 16 lb is required to keep the vehicle

*asked on September 13, 2009* -
## physics

A mass m is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed vi in a circle of radius ri. The cord is then slowly pulled from below, and the radius of the circle decreases to

*asked on April 6, 2009* -
## Chemistry

Last one. Describe how you would prepare 100ml of a solution that is 22% acetic acid by volume?

*asked on March 24, 2009* -
## Chemistry

Last one. Describe how you would prepare 100ml of a solution that is 22% acetic acid by volume?

*asked on March 24, 2009* -
## Calculus

Which of the following is a point at which the tangent to y=(x-2)^2(x+3) is horizontal? a) (-2,16) b) (-1, 18) c) (1,4) d) (2,0) I found the derivative of y=(x-2)^2(x+3) which is 3x^2-2x-8 if I solved for 0, it wouldn't give me the answer that are listed

*asked on February 19, 2012* -
## Calculus

Determine the slope of the tangent to the curve y=2(x^2+x-1)^3 at (-1, -2)

*asked on February 19, 2012* -
## physics

The 60kg collar slides on the curved rod in the vertical plane with negligable friction under the action of constant force F in the cord guided by the small pulley at D. If the collar is released from rest at A, determine the force F which will result in

*asked on October 31, 2009* -
## physics

A meteor P is tracked by a radar observatory on the earth at O. When the meteor is directly overhead (theta = 90), the following observations are recorded: r = 80km, r'= -20km/s, and theta'= 0.4rad/s. (a) Determine the speed of the meteor and the angle,

*asked on October 10, 2009* -
## physics

A block sits against a vertical wall and a 120 lb force P acts diagonally to the left on the block at an angle below the horizontal. Determine the magnitude and direction of the friction force which the vertical wall exerts on the 100 lb block if theta is

*asked on September 13, 2009* -
## Alegebra

Can some one please help me with this 3 problems I have a hard time with probabilities I'm studying for my mid-term. Thank you 1) Urn A has balls numbered 1 through 7. Urn B has balls numbered 1 through 5. A ball is selected at random from urn A and then a

*asked on September 11, 2009* -
## Calculus

Use the dot product to show that the line c = by + ax is perpendicular to vector v = They seem like they would be parallel. doesn't c also = ?

*asked on April 15, 2009* -
## Chemistry

How would you prepare 100 ml of 0.9% w/v saline?

*asked on April 14, 2009* -
## Chemistry

How many milliliters of a 2000.0 mg/dl stock solution are needed to prepare 100.0 ml of a 150.0 mg/dl working solution?

*asked on April 14, 2009* -
## Chemistry

Last one. Describe how you would prepare 100ml of a solution that is 22% acetic acid by volume?

*asked on March 24, 2009* -
## Math

How do you solve this: A 20-ounce bag of popcorn costs $2,80. If the unit price stays the same, how much does a 35-ounce bag of popcorn cost?

*asked on February 25, 2009* -
## Polynomial Functions

What do polynomial functions look like? And what can be consider a polynomial function? Would a graph that is like an upside down V be considered as a graph of a polynomial function?

*asked on October 10, 2007* -
## Chemistry

If a wave has a frequency of 5.5 x 10 to the 14th s -1, what is the wavelength in nm ? 1m = 10 to the 9 th nm

*asked on October 20, 2018* -
## biology

how is it possible for an enzyne to lower the required energy of activation for a reaction.

*asked on December 14, 2010* -
## 11th grade

so I have this problem and I don't know what numbers to multiple and whatnot. Can someone help me? This is the problem: 4000 g Fe2O3* 1mole Fe2O3/159.68 gFe2O3* 3mole CO2/1mole Fe2O3

*asked on December 2, 2010* -
## Cost Accounting

PLEASE, PLEASE, can you give me the step to calculate these: 1.Prepare the beginning inventory for the first quarter 2.Prepare the budgeted beginning inventory for the second - fourth quarters 3.Prepare the budgeted production for each quarter 4.Prepare

*asked on November 5, 2009* -
## Physics

Block A has a mass of 20kg and is placed on top of cart B which has a mass of 100 kg. Blosk A has a pulley attatched to it with a force of P acting towards the right. Cart B is on rollers. The coefficient of kinetic and static friction are both the same

*asked on October 23, 2009* -
## geometry

How are the radii of 2 two concentric circles related to the distance between them? I tried making an equation using their cirmcumferences but I was way off. All I did was subtract the inner circle's circumference from the outer circle's circumference and

*asked on October 11, 2009* -
## 3rd grade

my dauter have a math problem and I don't no how to help her. this is the question: estimate each diffirence using compatible numbers for exc. 53-24=30 the next is 346-78=? we don`t now the answer thank you.Jessi

*asked on October 1, 2009* -
## Alegebra 1

can someone please help me asap with this two problems I'm really stuck here. 1) solve for j if b=j+v/2 2) 9r+9s+9

*asked on September 21, 2009* -
## Chemistry

There are 200 mmoles NaOH/400ml. What is the molarity of the solution?

*asked on April 21, 2009* -
## Chemistry

If you had 6 moles in a 600ml of solution, what would be the molarity?

*asked on April 21, 2009* -
## Chemistry

Describe how you would prepare 500 ml of a solution that is 40% bleach solution by volume.

*asked on April 14, 2009* -
## Chemistry

A 2% solution of Hydrochloric acid is required for a procedure. A 5% solution is availabe. How much of the 5% solution will be required to make 1 L of solution?

*asked on April 14, 2009* -
## Chemistry

Describe how you would prepare 500 ml of a solution that is 40% bleach solution by volume.

*asked on April 14, 2009* -
## math

what is two hundred sixteen tenthousandths look like in expandses form

*asked on August 20, 2008* -
## Finance

need 1-2 pages Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is $1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statements as promptly as she

*asked on June 18, 2007* -
## Biology

Describe the changes you'll see (evolution wise) if you were granted 1 million years of life.

*asked on November 17, 2012* -
## Calculus

Determine the coordinates of the point(s) on the graph of y=3x- 1/x at which the slope of the tangent is 7. So the derivative of y=3x- 1/x is y'=3 + 1/x^2 What do I do next?

*asked on February 18, 2012* -
## math: pre calculus

How do I find the exact value of sec(2.4)?

*asked on March 9, 2011* -
## chemistry

How many moles of antifreeze (a molecular substance) must be added per liter of water to protect the cooling system of a motocar to -30 degrees F.

*asked on December 14, 2010* -
## management accounting

Fi a company has a policy of maintaining an inventory of finished goods equal to 30 percent of the following month's sales. For the forthcoming month of March, Ball has budgeted the beginning inventory at 30,000 units and the ending inventory at 33,000

*asked on November 4, 2009* -
## Chemistry

What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?

*asked on April 21, 2009* -
## Chemistry

How would you prepare 100 ml of 0.9% w/v saline?

*asked on April 14, 2009* -
## physics

A straight ladder is leaning against the wall of a house. The ladder has rails 4.50 m long, joined by rungs 4.800 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 3.400 m to the left of where it should be, and the

*asked on March 30, 2009* -
## Polynomial Functions-help

What do polynomial functions look like? And what can be consider a polynomial function? Would a graph that is like an upside down V be considered as a graph of a polynomial function?

*asked on October 12, 2007* -
## Graphs of polynomial functions

What do polynomial functions look like? And what can be consider a polynomial function? Would a graph that is like an upside down V be considered as a graph of a polynomial function?

*asked on October 9, 2007* -
## Math (1 Question)

Can someone tell me what property this is? 5(1) = 5

*asked on December 19, 2016* -
## Math

Given that |a-2| = 9 and |w-1| = 6, where a < 0 and w < 0, what is the value of aw? Please help and explain.

*asked on July 19, 2016* -
## math

Jason earns 30 cents for every carrot he sells. He earns an extra $3 for every 30 carrots he sells. How many carrots must he sell in order to earn $555?

*asked on April 29, 2015* -
## math

There are 32 more apples than oranges in a box. 35 of the oranges and 13 of the apples are overripe. If the number of overripe apples and the number of overripe oranges are the same, how many pieces of overripe fruit are there?

*asked on March 20, 2015* -
## Biology

Describe the changes you'll see (evolution wise) if you were granted 1 million years of life.

*asked on November 17, 2012* -
## Calculus-derivatives

Determine h'(x) for h(x)= [x/(1-x)]^2

*asked on February 20, 2012* -
## Physics

How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 3500 m?

*asked on October 30, 2011* -
## algebra

how do you use the substitution method to solve x + y =2 y = -2x

*asked on April 29, 2011* -
## pre-calculus

2y^-3 = 4e^(-x/2)/(1+e(-x/2)) my teacher gave this problem in my chem class and i don't know what he is really asking , does any one have an idea if i have to solve for y or what's going on.. how would this be done..

*asked on September 20, 2010*

## Pages

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