Thursday
December 18, 2014

Posts by Joshua


Total # Posts: 542

PHYSICS
A 209 kg block is released at height h = 3.3 m as shown. The track is frictionless except for a portion of length 7 m. The block travels down the track, hits a spring of force constant k = 1545 N/m, and compresses it 1.9 m from its equilibrium position before coming to rest ...
December 10, 2014

physics
A student, late for class, ran up some stairs between landings, which are 11.3 m apart. The student’s mass is 62 kg and it took 6.02 s to do the run. What is the average power that the student generated during the run?
December 10, 2014

Math
What are the comparisons between the mixed numbers 5.815 and 6.021
December 10, 2014

Calculus
Find the volume of the solid obtained by rotating the region bounded by the curves: 2x = -y^2 y^2 = -x + 2 y = 0 for y >= 0 about the x-axis. Not sure how to do this one, could anybody help me identify what this looks like and how to identify the outer/inner radius? Thanks
November 23, 2014

Calculus
Thank you!
November 23, 2014

Calculus
Scratch that, I received the answer of 11pi/30, I made a calculation error that first time. Is this correct?
November 23, 2014

Calculus
Find the volume of the solid obtained by rotating the region bounded by the curves: y = x^2 and x = y^2 about the line y = 1. I received the answer pi/30, using the outer radius of (1 - x^2) and the inner radius of (1 - x^(1/2)). Is this correct?
November 23, 2014

Calculus
This is the question: i[dot]imgur[dot]com/EHneTuB[dot]jpg Am i correct in simply adding 1 + (-3), and equates to (-2) being the answer.
November 16, 2014

Calculus
If I derive the following, d/dt((a)S(t^2) of (s)^(1/2)ds with S being integral notation (a) being at the bottom of the notation and being a constant (t^2) being at the top of the notation ..I first apply the fundamental theorem of calculus to get.. (t^2)^(1/2) (2t) simplified ...
November 16, 2014

Calculus
Ah Thanks!
November 15, 2014

Calculus
Thanks Steve. Does that mean the function is not odd? I thought odd functions are always integrated to = 0 because of their symmetry.
November 15, 2014

Calculus
This is a definite integral question. Evaluate the following integral: (0)S(a)((x)((a^2 - x^2)^(1/2)))dx with a being a constant and the (0) being at the bottom of the integral notation and (a) at the top. S is the integral notation. I firstly checked whether the function was ...
November 15, 2014

Calculus
Find f"(x). f(x) = x^3 - (5/x)
November 11, 2014

algebra
If 3.14*r^2=706.5? what does r=?
November 11, 2014

calculus
How did you get that Damon? I thought I could only reorder question as e^x/(1/x) and apply hopital rule from there
November 8, 2014

calculus
This is a question related to L'hopital's rule. lim x -> -infinity of ((x)(e^x)) This thing is weird because I apply l'hopital's rule yet I never receive the correct answer which is supposedly = 0. It just stays in the form [-infinity * -infinity]. Anyone ...
November 8, 2014

Calculus
?_?
November 8, 2014

Calculus
This is a question related to L'hopital's rule. lim x -> -infinity of ((x)(e^x)) This thing is weird because I apply l'hopital's rule yet I never receive the correct answer which is supposedly = 0. It just stays in the form [-infinity * -infinity]. Anyone ...
November 8, 2014

Algebra
You earn $250 per month from your part-time job. You are in a kayaking club that costs $20 per month, and you save at least $100 each month. Write and solve an inequality to find the possible amounts you have left to spend each month.Can someone please help me with this
October 22, 2014

Spanish Check
I understand completely now! Thank you for your help :)
October 12, 2014

Spanish Check
Can you tell me if any of my answers are wrong, and if so which/why? Instructions: Choose por or para to fill in the following phrases; 1. Compré las flores __________ mi novia. Compré las flores para mi novia. 2. Hice la tarea __________ la tarde. Hice la tarea ...
October 12, 2014

math
eva wants to make two pieces of pottery. She needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece. She has three bags of clay that weigh 4/5 pound a piece. How many bags of clay will eva need? How many pounds of clay will she have left over?
October 6, 2014

Calculus
why does the line have to cross (h, ln(h))?
September 27, 2014

Calculus
ah thank you steve
September 27, 2014

Calculus
My professor claims that it is solvable because it says that the point (0,0) lieS on a tangent line to the graph y=ln(x) at some point (a,b)
September 27, 2014

Calculus
Hello, my question is the following: The derivative of f(x) = ln(x) is given by f'(x) = 1/x. Find an equation of the tangent line to the graph y = ln(x) that passes through the point (0,0). So if I go through this using the typical method I use I have the point slope ...
September 27, 2014

math
A student is attempting to factor a polynomial. Sample mathematical work is shown below. Which statement best applies to the sample mathematical work? Given 3x + 6, the factors of the first term are 3 and x, and the factors of the second term are 1, 2, 3, and 6. Thus, the ...
September 22, 2014

math
Q: Suppose that for all xE(0,5), f(x) is between 1+x and 3+sin((pi)(x)). Find lim x->2 f(x). Is this question related to the intermediate value theorem? It is confusing me, can anyone help out? I am not certain of what xE(0,5) is defining, is that a set of x values or am I ...
September 21, 2014

Physics
A steel ball is dropped onto a hard floor from a height of 1.80 m and rebounds to a height of 1.64 m. (Assume that the positive direction is upward.) (a) Calculate its velocity just before it strikes the floor. m/s (b) Calculate its velocity just after it leaves the floor on ...
September 17, 2014

Physics
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 3.00 m/s, and her takeoff point is 1.10 m above the pool. (a) How long are her feet in the air? s (b) What is her highest point above the board? m (c) What is her ...
September 17, 2014

Science
I think the answer is d output.
September 16, 2014

Analytical CHM
Rank the following items in order of accuracy when they are used for their intended purpose: Volumetric pipet, beaker, Erlenmeyer flask, MOHR pipet, graduated cylinder, volumetric flask, buret. Explain your asnwer below Most accurate 1. 2. 3. 4. 5. 6. Least accurate 7. ...
September 5, 2014

Grammar
What is the simple subject and predicate in the sentence: They reach up to 60 inches tall, or 5 feet!
August 19, 2014

auto repair technician
Is there anyone taking the automobile technician course in penn foster wanting to team up to study together. I'm having trouble with exam #004846
August 19, 2014

life science
Why this fossils are important discoveries? They have features similar to homo sapiens, and the provide more information about the evolution of humans.
July 31, 2014

Physics
how much does a 2 lietr bottle of soda pop weigh in pounds? assume that the pop has the density ofg water,namely 1 kg\lietr and that the weight of the bottle itself is negligible?
July 14, 2014

Chem
A mixture is prepared by adding 28.6 mL of 0.169 M Na3PO4 to 39.7 mL of 0.255 M Ca(NO3)2. What mass of Ca3(PO4)2 will be formed?
July 1, 2014

Chem
How many grams of water could have its temperature raised from 25 ºC (room temperature) to 100 ºC (the boiling point of water) by the amount of energy released in the formation of 4.0 mol of H2 from hydrogen atoms? The bond energy of H2 is 435 kJ/mol. The specific ...
July 1, 2014

physics, science
What effect does friction have upon a) ball bounce angle, and b) ‘speed’ of the court? Refer to clay and grass courts to help illustrate your answer. (4 marks) please help!
June 30, 2014

physics
If a particle has kinetic energy K = 60 MeV when its momentum magnitude p = 100 MeV/c, what is the ratio m/me of its mass to the electron mass?
May 3, 2014

chemistry
thanks it helped
March 25, 2014

chemistry
please help! how do i find the molecular mass of C3H5O2 molecular mass of 292 g.
March 25, 2014

Computer science
Take two inputs from user: N - #items B - budget. There are S items, each with some price value, out of which user needs to select N items in such a way that total bill does not exceed B. The program should print all such combination of N products.
February 23, 2014

Chemistry
What is the final Celsius temperature if 4.42 L of nitric oxide gas at 35°C is cooled until the volume reaches 1.00 L? Assume the pressure remains constant.
February 14, 2014

Math
Sierra spent 2/3 of her earnings on clothes and 1/5 on school supplies. She saved the rest. What fraction of her earnings did she save?
February 11, 2014

Social Studies
so what is the answer
February 10, 2014

Math
Can you please help with the following: x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help, thanks
February 7, 2014

Math
A dog ate 48 bones. The other dog ate 47 bones. How much bones did both dogs eat?
February 6, 2014

Physics
Can you please help with the following: x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help, thanks
February 6, 2014

Art
what 2 colors make purple?
February 5, 2014

ecosystems
Tundra
January 30, 2014

algebra
12$
January 25, 2014

Calculus 1
On the graph of f(x) = 8*sin(3pi*x), points P and Q are at consecutive lowest and highest points with P occurring before Q. Find the slope of the line which passes through P and Q. Slope = ? I have tried 48/pi and it didn't work
January 23, 2014

science(CHECK ANSWERS)
how do you know they are right?
January 10, 2014

Math
Yes but I do not know how to solve your way of the equation.
January 9, 2014

Math
I also got 1 and 0 but I do not know.
January 9, 2014

Math
So would the answer be 31?
January 9, 2014

Math
How can I put that in an equation? would it be n+n+2+n+3=93?
January 9, 2014

Math
What does it mean by, "The sum of three consecutive odd integers is 93."
January 9, 2014

science(please check answers)
Hay Matt, number 2 is wrong it's d
December 20, 2013

science plz help right now!!!!
they are all right Elena. Good Job!
December 16, 2013

science plz help right now!!!!
1.B 2.D 3.C 4.D 5.C 6.B 7.D 8.B
December 16, 2013

science
I think it is B but please let me know if I am wrong.
December 9, 2013

Science
Are all of these questions from Florida Virtual School?
November 6, 2013

calculus
lim t-> -infinity for sqrt(4t^2-5t-1)/(2t-3) I get infinity or -infinity, but the real answer is -1. How does this occur?
October 16, 2013

calculus
oops double posted
October 16, 2013

calculus
The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?
October 16, 2013

calculus
I am still confused. hm.
October 16, 2013

calculus
f(x) = ln(ln(lnx)) has the domain of (e, infinity). I am not sure how this occurs however. I know in the case of ln x, x must be greater than 0. However where does e come from. e is the base of log in the case of ln, but something is just not clicking for me.
October 16, 2013

calculus
so basically what i said in the original question is irrelevant.
October 16, 2013

calculus
oops i think i meant to say that the derivative is 1/sqrt(1-x^2) dang I am tired.
October 16, 2013

calculus
The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?
October 16, 2013

Calculus
Perfect, thanks.
October 14, 2013

Calculus
I need step-by-step help for solving the lim x -> 0 for the function sin(x)/(x + tan(x)) I can do simpler ones, but this one throws me off. Thanks.
October 14, 2013

chemistry
A mixture was formed by adding 4.56g of KCL to water to make 175mL of solution. The density if the solution is 1.12g/mL. Whatis the mass percent and what is the molarity of the potassium chloride solution?
August 8, 2013

math
Translate the following statement into a numerical expression: 3 times the quantity of H less 233.
July 30, 2013

College Physics
1. In a region of two-dimensional space, there are three fixed charges: +1 mC at (0, 0), −2 mC at (18 mm, -3 mm), and +3 mC at (-8 mm, 12 mm). What is the net force on the −2-mC charge? Find the magnitude and direction (counterclockwise from the x-axis).
July 9, 2013

Math
Is 25x squared + 40x +15 a perfect square? And how do you factor it if it is?
May 24, 2013

Math
Using your answer to the question above, what is the net dollar amount of that rose order?
May 20, 2013

Religion
The days of Triduum are measured from _ _ _ _ _ _ to _ _ _ _ _ _.
April 10, 2013

7th Grade Language Arts!
All of them are write bob. Good Job!
April 3, 2013

Physics
A brick is thrown off a building at a 25 degree angle at 10m/s, it lands 40 meters away, How high is the building?
March 26, 2013

chemistry
85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded ...
March 26, 2013

chemistry
85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded ...
March 26, 2013

math
lol
March 17, 2013

math
Is there a way to prove this in upwards of 5 steps? Apparently there is?? Prove. 2^n + 2^n = 2^(n+1) I posted this before however apparently I need something more indepth in terms of the # of steps.
March 17, 2013

math
ok thanks
March 17, 2013

math
Alrighty, are there particular times you guys are most active?
March 17, 2013

math
Is it possible to set up a time to do a live chat with a tutor here? like for 15-20 min or so. I have a few questions, nothing major but would like to have answers explained to me/ any additional questions I have. Would be cool, i understand it is asking for alot.
March 17, 2013

Chemistry
A 100.0 g sample of water at 27.0°C is poured into a 77.4 g sample of water at 89.0°C. What will be the final temperature of the water?
March 14, 2013

Algebra
447
March 12, 2013

calculus
12
March 12, 2013

math
If i have a piece of pipe that is half a yard long and it's divided into 5 pieces what is the length of each piece in yards?
February 13, 2013

home economics
mention the types of disposal of fullness?
February 7, 2013

Math 8 -HELP! (PLZ!)
1. Write the fraction two-fourths as a percent. Round to the nearest hundredth of a percent where necessary. (1 point) 50% 20% 54% 48% 2. Write the decimal 0.041 as a percent. (1 point) 41% 4.1% 410% 0.41% 3. In the small country of Varia, a bill becomes law only if thirty-...
January 22, 2013

science
What can engineers do to help buildings survive in an earthquake?
January 17, 2013

Grammar
No the correct answer is My parents and I are jumping.
January 17, 2013

Grammar
That is wrong it should be My parents and I.
January 17, 2013

Science
7/10 Thank you so much.
January 17, 2013

Science
1/4 is that right
January 17, 2013

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