Wednesday

July 8, 2015

July 8, 2015

Total # Posts: 127

**physics**

the first law of thermodynamics can be expressed with the equation ΔU=ΔQ+ΔW where ΔU is the change of internal energy,ΔQ is the heat supplied to the system. Apply the first law to the brakes of a train as the brakes are applied and the train ...
*July 2, 2015*

**Electrolysis**

A current of 1.2A was passed through an electrolytic cell containing dilute Tetraoxosulphate(VI) for 40minutes. Calculate the volume of gas produced at s.t.p.
*June 16, 2015*

**statistics**

1. Suppose the estimate of a proportion of a normal population is to be within 0.05 using the 95% confidence level. How large a sample is required if: a. It is known from previous studies that p = 0.3? b. There is no prior knowledge of p? 2. Each of the following is a large-...
*March 31, 2015*

**math**

The temperature outside was 3 degrees Fahrenheit at midnight. During the next hour the temperature fell 7 degrees. What was the temperature at 1 A.M. Can u explain to me how to do it please
*January 12, 2015*

**Taxtation**

Another client, Ms. Dunham, has asked you to help her understand how her tax is computed. You need to provide Ms. Dunham with the following: An example of how to calculate the tax liability using the tax rate table and the tax rate formula for a taxpayer with taxable income of...
*October 15, 2014*

**Physics**

Two blocks of masses m1 = 4.4 kg and m2 = 4.8 kg are connected by a string as shown in the figure above. Block 1 moves at a constant velocity down the incline 30 degrees) block two is not at incline it is straight. they are attached with a string. a) Find the coefficient of ...
*July 13, 2014*

**Physics**

Two blocks of masses m1 = 4.4 kg and m2 = 4.8 kg are connected by a string as shown in the figure above. Block 1 moves at a constant velocity down the incline 30 degrees) block two is not at incline it is straight. they are attached with a string. a) Find the coefficient of ...
*July 13, 2014*

**econ **

This chart shows the components of nominal GDP for the years 2000 and 2001. All figures are in billions of current dollars. Components 2000 2001 Consumption $6,684 $6,987 Investment $1,755 $1,560 GovernmentSpending $1,751 $1,858 Exports $1,101 $1,034 Imports $1,467 $1,383 ...
*April 7, 2014*

**physics**

If the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury, what is the total pressure of gas supply in cm of water
*March 29, 2014*

**accounting**

On December 31, 2013, a company issues bonds with a par value of $600,000. The bonds mature in 10 years, and pay 6% annual interest, payable each June 30 and December 31. The bonds sold at $592,000. The company uses the straight-line method of amortizing bond discounts. The ...
*February 4, 2014*

**accounting**

On December 31, 2013, a company issues bonds with a par value of $600,000. The bonds mature in 10 years, and pay 6% annual interest, payable each June 30 and December 31. The bonds sold at $592,000. The company uses the straight-line method of amortizing bond discounts. The ...
*February 4, 2014*

**Chem**

I got part a but part b I'm having trouble with I keep getting 56.2mL. I'm not sure what the next step is really to find part b. A. How would you prepare 250 mL of a 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? Dissolve 4.87 grams solid CoCl2 into ...
*November 8, 2013*

**Finance**

Assume a bank has $5 million in deposits and $1 million in vault cash. If the bank holds $1 million in excess reserves and the required reserves ratio is 8 percent, what level of deposits are being held?
*October 22, 2013*

**differentiation **

Derive the central difference approximation for f′′(x) accurate to O(h4) by applying Richardson extrapolation to the central difference approx- imation of O(h2).
*November 18, 2012*

**Thanksgiving writing**

your mom faty
*November 16, 2012*

**physics (speed of plane by radar)**

The radar stations A and B, separated by the distance a = 500 m, track the plane C by recording the angles α and β at 1-second intervals, If three successive readings are shown in the table,calculate the speed v of the plane and the climb angle y at t = 10 seconds as...
*November 11, 2012*

**Dynamics**

Okay so I have a 1/2 in thick ellipsoidal steel plate where (p=493 lb/ft^3) and it has a major axis diameter of 4ft and a minor of 2ft. the plate rolls w/out slipping (friction=0.15) and in a vertical position has an angular velocity of of w=4 rad/s(i.e. the 4 ft diameter is ...
*April 19, 2012*

**physics**

A girl delivering newspapers covers her route by traveling 10.00 blocks west, 4.00 blocks north, and then 5.00 blocks east.
*February 22, 2012*

**physics**

A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Next, it flies for 150 km 20.0° west of north to city B. Finally, the plane flies 190 km ...
*February 22, 2012*

**physics**

A golfer takes two putts to get his ball into the hole once he is on the green. The first putt displaces the ball 8.10 m east, the second 6.00 m south. What displacement would have been needed to get the ball into the hole on the first putt?
*February 22, 2012*

**physics**

A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream with water speed equal ...
*February 22, 2012*

**physics**

A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream with water speed equal ...
*February 22, 2012*

**math**

4^(x 1) - 6^x - 2.9^(x 1) = 0
*February 19, 2012*

**Physics**

A lever has a 9-N load 1.5m from the fulcrum. Where should a 0.5N effort force be applied to balance the load?
*February 17, 2012*

**Physics**

A wheel with a radius of 20 cm is attached to an axle with a radius of 1cm. An effort force of 100 N on the wheel counters a resistance force of what on the axle?
*February 17, 2012*

**Physics**

How much effort force is required to life an 11000-N beam using a pulley system with a mechanical advantage of 20?
*February 17, 2012*

**Physics**

A car parked on a hill. The driver starts the car, accelerates until the car is driving at constant speed, drives at constant speed, then brakes to put the brake pad in contact with the spinning wheels. How is static friction, sliding friction, rolling friction, and air ...
*February 17, 2012*

**Science**

A lever has a 9-N load 1.5m from the fulcrum. Where should a 0.5N effort force be applied to balance the load?
*February 17, 2012*

**Science**

How much effort force is required to life an 11000-N beam using a pulley system with a mechanical advantage of 20?
*February 17, 2012*

**science**

A wheel with a radius of 20 cm is attached to an axle with a radius of 1cm. An effort force of 100 N on the wheel counters a resistance force of what on the axle?
*February 17, 2012*

**Math**

A spinner is divdided into 10 equal sectors and numbered 1 through 10. Find the probability as a fraction, a decimal and a percent for P(composite numbers.
*January 26, 2012*

**Science**

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point? PLEASE ANSWER THIS I'M STUCK!
*January 19, 2012*

**Science**

WHen a wrecking ball hits a wall, it is usually moving at about 10 km/h, which is not very fast. How can this ball knock down a solid wall?
*January 19, 2012*

**Science**

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point?
*January 19, 2012*

**Science**

An 80 kg person decides to jump off the back end of a 30 kg canoe. His friend measures the speed of the canoe after he jumps to be 0.8 m/s. The canoe was initially at rest. What rule would I use to find the speed of the person who jumped?
*January 19, 2012*

**Science**

Suppose you and your bicycle have a total mass of 70 kg. YOu are moving at 10m/s. How much kinetic energy do you and the bicycle have?
*January 19, 2012*

**math**

mario wants to put a rectanguar frame on a picture of a snowboarder.he has 18cm of string to make a the frame. Q-does he have enough strings and what could be the dimensions.
*December 28, 2011*

**math**

$35 soccer cleats marked up 95%
*December 18, 2011*

**math**

1.35/1.35=x, 59.4/1.35=44
*December 18, 2011*

**math**

yes its marked up
*December 18, 2011*

**math**

can u help me with a problem like this find the original price: tickets marke35% to $59.40 and find the percent of the discount or markup: $52 sweater on sale for $31.20 please help
*December 18, 2011*

**math**

well i think you multiply 4 by 125 but i dont know and its not one of my options i have
*December 18, 2011*

**math**

125 pounds decreased by 4%
*December 18, 2011*

**science**

A push is an example of what?
*November 16, 2011*

**maths **

find the general solution of the following first order differential equation. dx/dt = t*x + 6*t(exp)-t^2 pls show working
*October 26, 2011*

**maths**

please help find the general solution of the following first order differential equation. dx/dt = tx + 6t(exp)-t^2 pls show working
*October 26, 2011*

**Math**

A restaurant manager lost $415 in business during the month of January. Business picked up in February, and he ended that month with a profit of $1580. What if the restaurant lost $245 in business during the month of March. What was the manager's profit after January, ...
*August 25, 2011*

**Chemistry**

How to seperate acetic acid from aqueos solution.
*July 5, 2011*

**Chemistry**

How to seperate acetic acid from aqueos solution.
*July 5, 2011*

**english 3**

The beauty and splendor of Gatsby's parties masked the innate corruption within the heart of the Roaring Twenties. Jazz-Age society was a bankrupt world, devoid of morality, and plagued by a crisis of character."
*June 29, 2011*

**Algebra**

In 1993, the life expectancy of males in a certain country was 71.5 years. In 1998, it was 73.6 years. Let E represent the life expectancy in year t and let t represent the number.
*May 7, 2011*

**math**

If an electrician works for $750.00 per hour. What would be his salary for 2 days?
*April 4, 2011*

**acct**

Business is going well for Email Designers. The board of directors of this family-owned company believes that Email Designers could earn an additional $1,000,000 income before interest and taxes by expanding into new markets. However, the $4,000,000 the business needs for ...
*January 29, 2011*

**Science**

Would you expect orange juice to be more dense than water? Explain.
*January 24, 2011*

**electrics**

mechanical engineering
*January 13, 2011*

**3rd grader math homework**

write to explain. bethany has 43 apples. write a subtraction story about the apples that would requiem for a dream
*November 3, 2010*

**social studies**

can someone help me start my persuasive essay on vote for amendment 2 2010?
*November 2, 2010*

**Math **

the answer is 0!
*November 2, 2010*

**algebra**

(5c²+5cd)+(4c²d-2cd-6)+(-cd+8)
*June 2, 2010*

**Computer Programming**

Hoe do I write a program to Create a C++ console application that uses cout to display a box of asterisks?
*April 29, 2010*

**math**

Using only these numbers once for each answer 8,1,4,3,7 the product of two 2 digit numbers plus a number is 3,355. What are the numbers?
*April 28, 2010*

**4th grade**

Using only 8,1,4,7,3 only appearing once in an answer. The product of two 2 digit numbers plus a number is 3,355. What are the. Numbers?
*April 28, 2010*

**math**

4/x - 4/y divided by y^2 - x^2 / 4 4/x - 4/y = (4y -4x )/xy taking the LCD y^2 -x^2 = (y +x )(y-x) using the differences of square formula it would be 4y- 4x / xy divided by (y-x)(y+x) / 4 Do the reciprocal and multiply with the fractions 4 (y-x ) .xy * 4 / (y-x)(y+x) Answer ...
*February 18, 2010*

**math**

1000000000000000000000000000000000000000+1234567891011=
*December 5, 2009*

**Math**

Write the negation of the following: A snowy day is cold.
*November 16, 2009*

**Math**

Give a verbal, visual, numerical, and graphic representation for the idea one and one-sixth.
*November 16, 2009*

**algebra II**

Two runners at opposite ends of a 5 mile bridge begin jogging towards each other. Runner A is running at 5 mph, runner B is running at 4 mph. A mosquito lands on one runner as he starts on the bridge than proceeds to fly back and forth between the runners at 8 mph. How far has...
*September 28, 2009*

**Chemistry**

2CH3OH(l)+3O2(g)-->2CO2(g)+4H20 +1350 kj 1. What mass of water could be heated from 20.0 C to 35 C,by burning 48g of methanol? This is what I did, no answer was given so I want to double check. so q=mcT change in H=n(molar enthalpy) c= 4.184 kj/(kg C) So what I did was ...
*July 27, 2009*

**chemistry**

thanks
*July 23, 2009*

**chemistry**

1. Need help Assigning oxidation numbers. Is it true that wehn looking at atoms in compounds from group 1 or 2 they are given the oxidization number which is the same as there charge example NaCl Na has an oxidization number of 1? But is this also true for atoms in compounds ...
*July 23, 2009*

**math**

36/24=24/x cross mulitply solve for x i get 16
*July 23, 2009*

**science**

since when is water blue
*July 23, 2009*

** math**

1.3x=1430 x=1430/1.3=1100 so the attendance from last year since it fell by 35% last year only 65% is left so 0.65(1100)= 715 so this years attendance was 715 students
*July 23, 2009*

**math**

M= (y2-y1)/(x2-x1) so (-3-5)/(10-9)=-7
*July 22, 2009*

**science**

when crystals collide with dissolved ions the substance precipitates out of solution and when crystals collide with water they for dissolved solute... does this have anything to do with equillibrium and what does precipitate out of solution imply?
*July 21, 2009*

**science**

solubility equillibrium is dynamic equillibrium between undissolved excess solute and solvent or aqueous solution and crystal in a saturated solution. so rate of dissolving = rate of crystalization if any more solute is added it will disrupt equillibrium and a precipitate will...
*July 21, 2009*

**religion**

Thanks for the response it is actually 9:23p.m. here and I have all day tomorrow if I don't finish it tonight
*June 25, 2009*

**religion**

Hello I need some help I have a paper due and I need to ask a pastor a few questions about religion this is due friday and i'm trying to get it done tonight is there is anyone who can help please do thank you so much.
*June 25, 2009*

**math**

The perimeter of a rectangle is 128m. The length is 4m more than twice the width. Find the dimensions.
*June 16, 2009*

**math**

Solve by substitution method 8x+9=-2 -9x+y=69 what is the solution of the system?
*June 16, 2009*

**math**

Solve by substitution method 9x+6y=21-9x+y=35 What is the solution of the method?
*June 16, 2009*

**math**

Again thank you for the help and I now understand how to do these problems you were a great help
*June 16, 2009*

**math**

Solve by substitution method 7m+n=27 m-8n=69 What is the solution of the system?
*June 16, 2009*

**math**

Review example 2 How does the author determine what the? Example 2. Translate. The first row of the table and the fourth sentence of the problem tell us that a total of 63 pupae was received. Thus we have one equation: p+q=63 Since each pupa of morpho granadensis costs $4.15 ...
*June 16, 2009*

**math**

Thank you for the help when i post questions on jiskha I do not use the actual numbers involved in my problem and when I do not show any work it is because i do not have a clue how to do the problem but you helped me out a lot and I know understand how to do them. Thank you so...
*June 16, 2009*

**math**

Solve the system by graphing. Then classify the system.? 6x-y=50 6x+7y=-14 What is the solution of the system? (type an ordered pair. Type N if there is no solution. Type R if the solution is all real numbers)
*June 16, 2009*

**math**

Solve the system of equations by graphing. Then Classify the system? 4u+v=1 4u=v+7 What is the solution of the system? (Type an ordered pair. Type N if there is no solution. Type R if the solution is all real numbers.)
*June 16, 2009*

**math**

Solve the system of equations by graphing. Then classify the system? y= -x -11 4x -3y=-2 What is the solution of the system? (Type an ordered pair. Type N if there is no solution. Type R if the solution is all real numbers.)
*June 16, 2009*

**math**

Write an equation of the line containing he given point and parallel to the given line? Express your answer in the form y=mx+b (6,8);x+7y=5
*June 13, 2009*

**math**

The function p(d)=1+d/33, gives the pressure, in atmospheres (atm), at a depth d in the sea? (d in in feet). Note that p(0)=1 atm, p(33)=2, and so on. Find the pressure at 40 feet (Type answer as a integer or a simplified fraction.)
*June 13, 2009*

**math**

solve for x x+8=-1 solving with addition and subtraction(type in)
*May 14, 2009*

**Math**

LCM of (x-y) and 2(y-x)
*February 26, 2009*

**7th grade sci.**

yes that is very true John thank you for the help
*February 19, 2009*

**French**

I am almost done with my power point on La Route du Rhum. I just need to figure out what the first place of La Route du Rhum gets and why so many people do the race. does anybody know??? thanks
*February 18, 2009*

**Science**

I am trying to find the watts, volts, and amps for eletrical appliances in the famiyroom/livingroom. Do you know of a website that has those listings because I tried to look at home on the appliances but can't find all the info. thanks:)
*February 17, 2009*

**French**

Bad thing happened, you may remember my other post about what does La Route du Rhum mean but anyway... I was at the library and got all this information but my time ran out and the computer logged off so I wasn't able to same it. I know wherei got most of the info. but I ...
*February 15, 2009*

**French**

Thanks:)
*February 13, 2009*

**French**

How did the sailing compotition La Route du Rhum get its name? Thanks
*February 13, 2009*

**Social Studies**

Thanks bobpursley and Ms. Sue:)
*January 12, 2009*

**Social Studies**

I have researched this a little but am still not sure what the answer is... Why was Sir Thomas More beheaded? With waht did he disagree? Thanks:)
*January 12, 2009*