Sunday
February 7, 2016

Posts by andrew

Total # Posts: 1,091

Science
If an astronaut with a tool belt accidentally pushed off from the shuttle, how could the tools in the belt be used to return the astronaut to the shuttle?
February 2, 2016

Math
What's another way you can write 0.023 (fraction or percent) problem: write 0.023 two different ways
January 27, 2016

english 1
Which sentence from the passage best supports the conclusion that the author was influenced by Amaterasu?
January 21, 2016

Math
Find two consecutive odd integers such that the square of the larger is one less than twice the square of the smaller.
January 12, 2016

Physics
A force F = 119 N acts at an angle α = 31◦ with respect to the horizontal on a block of mass m = 22.5 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2 . If the static frictional coefficient is µs = 0.72, what is the force ...
January 11, 2016

math
7x-3y=41 2x=-5y Solve using augmented matrix What do i do?
January 4, 2016

Math
$10,000 invested. part at 3% and part at 6% for a period of 1 year. how much was invested in each account if the interest earned in the 6% account was $357 greater than the 3% account?
December 20, 2015

Math
Sorry I remembered it wrong. Here it is again. A candy machine contains 5 times the number of nickels in dimes and 16 less than the number of nickels in quarters. How many of each are there?
December 15, 2015

Math
A candy machine contains 5 times the number of nickels in dimes and is less than 16 the number of quarters. Total value is $12.80. How many are there nickels and dimes? I can't understand what means 5 times the number of nickels in dimes. How do you put nickels in dimes? ...
December 15, 2015

Math
90 members of a sport club plays at least one of the game tennis,football and volleyball,10 plays tennis and football,19 play football and volleyball and 29 plays tennis and volleyball.x people plays all the 3 games,while x people each play only one game how many play football...
December 8, 2015

Math
A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...
December 7, 2015

College of Medicine ;University of Malawi
what is the ph at 25 degrees Celsius of a solution made by dissolving a 5.00 grain tablet of aspirin in 0.500 litres of water? The tablet contains 0.325g of the acid HC9H7O4. ka=3.3*10^-4mm=180.2g/l
December 3, 2015

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

Math
56
September 9, 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

Pre-Algebra (Probability)
The probability of choosing a 5 and then a 6
May 7, 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
Ok
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

Statistics
idk
March 16, 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
near 2.50
December 12, 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

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