Saturday

November 28, 2015
Total # Posts: 1,072

**Physics**

Szymon and Chris fly their balloon around the earth in 80 days. Taking the radius of the earth to be 6400 km, calculate their average speed in m/s. I did answered all the homework questions but I didn't know how to do this one?
*November 21, 2015*

**Kids kingdom school**

Perimeter= adding all outside sides. A carpet is square one is 15cm and the other is 12cm and because its square the other side will be the same since it's parallel 15+15+12+12= 30 + 24 = 54
*November 21, 2015*

**Programming**

Write a program that inputs (from the user) the number of hours worked and hourly rate for employees and outputs the total pay. The program should process an arbitrary number of employees; the user will terminate input by entering 0 hours worked and pay rate. Use a class ...
*November 1, 2015*

**Chemistry**

Calculating theoretical yield and percentage yield from preparation of 4-acetoxybenzoic acid from the interaction of 4-hydroxybenzoic acid and sulphuric acid
*October 28, 2015*

**Chemistry**

1. Explain in terms of rate laws and/or reaction quotients why the product’s low solubility favors the forward reaction over the reverse. The forward rate law is rate = k[maleic acid]n and the reverse rate law is: rate = k[fumaric acid]n. Consider how the rate laws are ...
*October 25, 2015*

**Chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate?
*October 19, 2015*

**chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate? How are transmittance values are affected by the amount of sample on your salt plate?
*October 19, 2015*

**Math**

How could you use the product of 108 and 4 to find the product of 324 and 4
*October 13, 2015*

**physics**

When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force she must exert if her deceleration is 5.00 times the acceleration of gravity.
*October 3, 2015*

**math**

can you solve expressions that have the same variables, but are in a different order? For example: 36jkm - 36mjk
*October 1, 2015*

**chemistry**

Recrystallization Lab What are the potential consequences of using a spatula to scrape crystals from wet filter paper during filtration?
*September 30, 2015*

**Math**

my son was asked to find each product by factoring the tens, and to draw rectangles if needed to on 6x2, 6x20, and 6x200. I'm not sure how to do this. please help me
*September 28, 2015*

**Accounting**

Department S had no work in process at the beginning of the period , 18,000 units were started during the period, 2,000 units were 30% completed at the end of the period, and the following manufacturing costs were debited to the departmental work in process account during the ...
*September 3, 2015*

**physical science **

If the park is 360 meters wide and the tram takes 6 minutes to get to the other side, how fast is it moving?
*August 26, 2015*

**Physics**

A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below. A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 10-2 Ω. The ends of the ...
*August 14, 2015*

**Economics**

If switching to fast replenishment compared to holding inventory in a dc (distribution center). Is this: Operational? Tactical? or Strategic?
*August 12, 2015*

**physics **

A small truck runs off the road and over a 100metre high cliff. It lands 50 metre from the base of the cliff. How long did it take for the truck to hit the ground
*June 20, 2015*

**physics**

A stationary pool ball with mass 0.20 kg is struck with an average force of 35 N over a time of 18 ms. What speed does it have just after impact?
*May 27, 2015*

**Math**

Can you explain why they work plz i just don't understand
*May 25, 2015*

**Math**

Plz Help!!! List three different ways to write 5 (with an exponents of 11) as the product of two powers. explain why all three of you expressions are equal to 5 with an exponent of 11… so far i just know that when your dealing with multiplying a power you add. any ...
*May 25, 2015*

**physics**

Voltage= Current X Resistance(ohms law) V-the battery voltage R-resistance in a circuit V=IR P=IV P=V2/R, where 2 is an exponent P=I2R, where 2 is an exponent P=Power q=CV q=charge C=Capacitance V=voltage (ohms law for capacitors)
*May 21, 2015*

**Physics**

Kinematics Average Velocity= the change in displacement of the x value time the elapsed time(avg velocity) Vage=X/T Average Velocity=initial velocity+final velocity divided by 2(avg velocity for constants) Vavg=Vi+Vf/2 Acceleration=the change in velocity divided by the elapsed...
*May 21, 2015*

**Calculus**

If f(5) = 7, then lim f(x) ------------------x-> 5
*May 18, 2015*

**Calculus**

If f(5) = 7, then lim f(x) x-> 5
*May 18, 2015*

**Language Arts**

Does any one have the answers because igot 75% on my test but it wouldn't tell me which ones i got wrong so does any one have the 100% correct answers? thx
*May 16, 2015*

**Calculus**

f(x)=xe^-x^2. What interval is this function increasing.
*May 11, 2015*

**World Geo, Help pls**

what is 3 and 6?
*April 27, 2015*

**Math**

Use the graph below to answer the following question. 1. Find the slope. (1 point) 2 – –2 Use the graph below to answer the following question. 2. Find the slope of the line. Describe how one variable changes in relation to the other. (1 point) 2; distance increases ...
*April 24, 2015*

**Language Arts**

1. How do both employers first cheat their governess? The employers say they mad a note of the fact that the pay is 30 rubbles a month and not 40 The employers indicate that an agreement was made about losing pay for holidays The employers decide to deduct rubles from the ...
*April 23, 2015*

**L.A. The Governess :)**

The answer is B
*April 23, 2015*

**Science**

Thx for helping same if you need help
*April 23, 2015*

**Science**

Yes you are correct the answer is B
*April 23, 2015*

**Science **

1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
*April 23, 2015*

**Science **

1. A weatherman reports, "the storm waves are about 2 meters high and about 35 meters apart. "what properties of waves is the reporter describing? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*April 16, 2015*

**AP Physics**

A racing car travels on a circular track of radius 220 m, moving with a constant linear speed of 48.9 m/s. Find its angular speed. Answer in units of rads/s. I already mutiplied 2π x 220. But I don't know what to do from there? Any help please? Thanks!
*April 8, 2015*

**Chemistry**

How many moles of H2O are in 12.7 grams of H2O?
*April 1, 2015*

**algebra II**

log(x+2)+log(x-3)=log(x+29)
*March 26, 2015*

**Physics**

Calculate the work done on the system when 1.00 mol of gas held behind a piston expands irriversibly from a volume of 10.0dm^3 against an external pressure of 1.00 bar?
*March 23, 2015*

**english**

Revise the following word groups to remove all fragments and/or parallelism errors. I like baseball because it is fun and teaches me about the sport. My Answer I like baseball, it teaches me about the sport and it’s also fun.
*February 28, 2015*

**English**

I like baseball, it teaches me about the sport and it’s also fun.
*February 28, 2015*

**Economics**

In a perfect competitive market setting,which of the following would be a true statement? a)market price automatically sets itself exactly at equilibrium b)market price rarely trends toward the equilibrium value c)wage rates trend toward marginal revenue product levels d)wage ...
*February 24, 2015*

**Economics **

When a monopolist increases sales by one unit a)more low priced sales caused negative marginal b)every other unit must be sold at a lower price c)gains some revenue from selling the extra unit D)loses some revenue and all of the above
*February 24, 2015*

**Physics**

A 65.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800.
*February 22, 2015*

**math**

Find the horizontal and vertical asymptotes of the curve. y = 3x+6/x−7 x= y=
*February 11, 2015*

**math**

Find the horizontal and vertical asymptotes of the curve. y = 3x+6/x−7
*February 11, 2015*

**math**

Find the horizontal and vertical asymptotes of the curve. y = x^2+5/9x^2−44x−5 x= (smaller x-value) x= (larger x-value) y=
*February 11, 2015*

**Math**

The distance from the pole in the center of the tetherball circle to the painted circle is about 6 feet. What was the approximate radius of the tetherball circle?
*February 9, 2015*

**Spanish**

?Que pides muchas veces como plato principal?
*February 4, 2015*

**French**

My instructions are to replace "le dîner à mes grands-parents dans" with pronouns in this sentence: "Alors, nous servons le dîner à mes grands-parents dans leur chambre." I got "Alors, nous l'y servons leur ...
*January 7, 2015*

**Math**

A distressed ship is 10 miles south and 8 miles east of a coast guard station. a) What bearing should the coast guard boat take to reach the distressed ship? b)How many miles will the coast guard boat travel? c)If the coast guard boat is traveling 30 miles per hour, how long ...
*January 6, 2015*

**maths**

the total revenue and the total profit functions (in Ringgit) of a product are given as follows: total revenue :R(x)= x^3-95-800x total profit: P(x)=1/3x^3+800x-120 where x is the number of units produced and sold. find the level of production in which the total cost is a ...
*January 4, 2015*

**maths**

Sorry the full question is: If the third term of a of a geometric sequence is 7, and the 7th term is 16.807, what is the common ratio?
*January 3, 2015*

**Maths**

if the third term of a geometric sequence is 7, what is the common ratio? would appreciate if u can show me the working. Thank you
*January 3, 2015*

**Math**

A tractor tire has a diameter of 6 feet and is revolving at a rate of 45 rpm. At t=0, a certain point is at height 0. Write an equation to describe the height of the point above the ground after t seconds. The answer is apparently d=-3cos(3pi/2)t +3 But I thought it's ...
*January 1, 2015*

**Math**

A Ferris wheel makes 3 revolutions per minute. If the diameter is 20 feet, write an equation to describe the height off the ground of a particular seat after t seconds. I got d=10cos(6pi)t as the answer, is this correct?
*January 1, 2015*

**Math**

A floating leaf bobs up and down a total of 8 cm. the leaf completes 3 complete cycles in 8 seconds. (Assume equilibrium at t=0.)Write an equation to model the simple harmonic motion. Can someone explain to me why the answer to this problem is d=4sin(3pi/4)t?
*December 27, 2014*

**Math**

So because the question states "lowest point", the cos is negative?
*December 27, 2014*

**Math**

Will Rogers spun a lasso in a vertical cycle. The diameter of the loop was 6 feet, and the loop spun 50 times each minute. If the lowest point on the rope was 6 inches above the ground, write an equation to describe the height of this point above the ground after t seconds. ...
*December 27, 2014*

**Math**

Write an equation with phase shift 0 to represent simple harmonic motion with initial position -1/2, amplitude 1/2, and period 4. I got d=(1/2) sin (pi/2) t + (1/2). Is this correct?
*December 26, 2014*

**Math**

Why isn't it (2pi) / (3pi) or (2pi) / (3), since the problem asks when t=3?
*December 25, 2014*

**Math**

Find the amplitude, frequency, and distance when t=3 a. y=-15cos((pi*t)/3)+5 b. y=120sin100pi*t I think the amp for a. is 15, the freq is 3/2 cycles per unit of time, and the distance is 20, but I'm not totally sure if I'm approaching this problem correctly.
*December 25, 2014*

**English**

Ok now I do get it now. I understand what I will do for the rest. Thank you for your time.
*December 14, 2014*

**English**

No, I cannot. From what I see chapter 8 is mostly Pathos......except for when he talks how his grandmother was wronged. He is taking a stand for her.
*December 14, 2014*

**English**

That he is worried and scared. More anxious than most slaves since he has fallen under the hands of a kinder master. Anxious about his fate which lies in the hands of the white brutes.
*December 14, 2014*

**English**

Could I use from Chapter 8 of Frderick Douglass where they assault his broher as an ethos to show how they were cruel and or abusive?
*December 14, 2014*

**English**

I REALLY need help finding a use of Ethos in "Narrative of The Life of Frederick Douglass, An American Slave", chapter 8. Do not know if I should use part where they treat his grandmother badly after serving master for such a long time.
*December 14, 2014*

**math**

The Suarez family paid $15.75 for 3 movie tickets. How much would they have paid for 12 tickets.
*December 7, 2014*

**math to mark**

Thay would weigh 210 pounds because you divide 150 by 5 and you get 30 and then you plug that in and you do 7 times 30 and that is 210 so the ratio is 5:7,150:210
*December 3, 2014*

**physics**

if the radius from the discus to the axis of rotation is 1.4m, what is the linear velocity of the discus at the time of release?
*December 3, 2014*

**Intro Biology**

Update, I got helped already.
*November 25, 2014*

**Intro Biology**

I can't find examples in the book as reference. Please help me with these questions and explain why. 1.) Which of the following has no vascular tissue (“plumbing system”)? A) Conifer B) Angiosperm C) Fern D) Moss E) Ginkgo 2.) Which of the following ...
*November 25, 2014*

**Physics**

Car 1 going northward (direction 90 degrees) at 14 m/s in an SUV weighing 2300 kg. car 2 going southwest (direction 225 degrees) at 16 m/s in a car that weighs 1600 kg. it is a completely inelastic collision. What is the direction and speed of the two vehicles immediately ...
*November 25, 2014*

**math**

Is the answer 18 students?
*November 18, 2014*

**math**

An art teacher has 1 1/2 pounds of red clay and 3/4 pound of yellow clay. The teacher mixes the red clay and yellow clay together. Each student in the class needs 1/8 pound of the clay mixture to finish the assigned art project for the class. How many students can get enough ...
*November 18, 2014*

**Thank Jiskha tutors**

I really appreciate all that you tutors do for us, I know we may be a bit demanding sometimes XD but we really love how you guys are always there to help us out. Coming from experience, I've had some past teachers that aren't as willing to help us when we do not ...
*November 16, 2014*

**history essay please help!**

Nevermind I got it but thanks!!!
*November 14, 2014*

**history essay please help!**

The goal of the essay is to tell what caused a skyrocketing population from 100 years ago to now. Well, I don't think I ended the essay good, can you help me end it? How about this: Those are just a few of the reasons, but modern technology has certainly done a role in the...
*November 14, 2014*

**history essay please help!**

Population growth is just how many people compared from 100 years ago to now. That's what I think it is.
*November 14, 2014*

**history essay please help!**

How does the growth of the world's population today compare with its growth 100 years ago? Explain why the changes have taken place. My essay: Today's world population growth compared to the population growth 100 years ago is a big, big difference. The population has ...
*November 14, 2014*

**Math**

Maggie makes some fruit punch. She mixes 2 1/2 quarts of grape juice with 1 1/2 quarts of orange juice. One quart of grape juice costs $1 less than one quart of orange juice. She finds that the total cost of making the fruit punch is $12.50. Calculate the cost of each quart of...
*November 4, 2014*

**Chemistry**

In the combustion of natural gas according to the equation CH4 + 2 O2 -> CO2 +2 H20, how many grams of water are formed during the combustion of 0.264 mole of CH4?
*October 26, 2014*

**math asap**

Thank you!!
*October 23, 2014*

**math asap**

Thank you but on more question, where did you get the 8 in 3/8, i was confused about that. because the question has 3/5
*October 23, 2014*

**math asap**

i'm pretty sure its 25 because 25+15 = 40, but i don't know how to get the 25.
*October 23, 2014*

**math asap**

if a 40 m rope is cut into two pieces in the ratio 3 : 5, how long is each piece? i tried: x=one piece 3/5 = x/40 x= 3*40/5 x=120/5 x=24 is that right?
*October 23, 2014*

**math**

If a 40 m rope is cut into two pieces in the ratio 3:5, how long is each piece? I tried it but I checked it and it was wrong, please help.
*October 23, 2014*

**Chemistry**

That's okay, I'm just wondering how to calculate the pH's at each mL increment in order to create the graph.
*October 22, 2014*

**Chemistry**

Plot the titration of a weak base with a strong acid. Show the titration curve using .106M NH3 and .225M HCl for a 50.00mL sample of the ammonia. No idea where to start here. I'm supposed to plot the curve from 2mL increments (0-30). Tip on homework: *Remember to use the ...
*October 22, 2014*

**Physics**

1.) Let's say that an an orange is launched upward at 22m/s. What is the displacement 3.5s later? 2.) When a volcano erupts, big rocks have been measured to reach heights of 50km (50,000m) What would the initial velocity need to be in order to reach such heights (neglect ...
*October 15, 2014*

**Physics**

Assume that the batter did not continue to swing the bat after the collision (no energy was added to the system). How fast was the bat moving after the collision? The ball mass .145kg, the bats mass is 1.1kg. And the balls velocity is 44.7m/s and the bats velocity prior to ...
*October 8, 2014*

**Science**

The flask shown here contains 10.0 ml of HCl and a few drops of phenolphthalein indicator. The buret contains 30ml of 0.130M NaOH. What Volume of NaOH is needed to reach the end point of the titration? I've used m1v1=m2v2, (x)(10.0ml HCl) = (0.130 M/L NaOH) (0.03L) and ...
*September 28, 2014*

**Pre-Calc**

1.) If you use the parent graph y=sqaureroot of x as a reference, how would you graph y=sqaureroot of x+2+5? a.) Move the parent graph two units to the right and then up five units. b.) Move the parent graph two units to the left and then up five units. c.) Move the parent ...
*September 26, 2014*

**Statistics**

Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...
*September 15, 2014*

**Statistics**

Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...
*September 15, 2014*

**PHYSICS**

Three forces, A,B and C act in the same vertical plane from point O. Force A is 30N and acts horizontally to the left of O. Force B is 40N and acts vertically upwards. Determine force C and the direction in which it acts, if the forces are in equilibrium.
*September 14, 2014*

**chemistry**

Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. 2D(g)+3E(g)+F(g)>>>>2G(g) + H(g) when D is decreasing at 0.30 MOL/Ls, how fast is (H) increasing?
*September 8, 2014*

**trigonometry**

how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)
*August 31, 2014*

**PHI 208 **

T, HILL Self-love Humility Self-acceptance Relational harmony
*July 19, 2014*