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Joshua

Questions (425)

Draw the pH-titration curve for the following, label x and y axes accordingly.10 mL of 0.1M H3PO4 with 0.1 M NaOH (Logk values =
1. 1 answer
2. 636 views
Comment on the order of elution of the following solutes in (a) normal phase and (b) reversed phase liquid chromatography. Give
1. 1 answer
2. 716 views
In elution chromatography (Ion-exchange) outline the order of elution for the following cationic species: Cu2+, Fe3+, Ag+ and
1. 1 answer
2. 850 views
a solution of HCL is approximately 0.1M and has to be standardized . 1.234g Na2CO3 are dissolved to make 100ml of solution. 20mL
1. 2 answers
2. 844 views
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
1. 0 answers
2. 612 views
A student, late for class, ran up some stairsbetween landings, which are 11.3 m apart. The student’s mass is 62 kg and it took
1. 0 answers
2. 1,368 views
What are the comparisons between the mixed numbers 5.815 and 6.021
1. 1 answer
2. 436 views
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
1. 4 answers
2. 577 views
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
1. 3 answers
2. 559 views
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
1. 0 answers
2. 582 views
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
1. 0 answers
2. 517 views
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
1. 4 answers
2. 652 views
Find f"(x).f(x) = x^3 - (5/x)
1. 1 answer
2. 327 views
If 3.14*r^2=706.5? what does r=?
1. 1 answer
2. 331 views
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
1. 5 answers
2. 567 views
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
1. 1 answer
2. 557 views
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
1. 3 answers
2. 1,821 views
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
1. 4 answers
2. 957 views
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.
1. 1 answer
2. 904 views
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
1. 5 answers
2. 900 views
A student is attempting to factor a polynomial. Sample mathematical work is shown below. Which statement best applies to the
1. 1 answer
2. 1,088 views
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
1. 1 answer
2. 360 views
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
1. 0 answers
2. 868 views
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
1. 0 answers
2. 1,243 views
Rank the following items in order of accuracy when they are used for their intended purpose:Volumetric pipet, beaker, Erlenmeyer
1. 1 answer
2. 727 views
What is the simple subject and predicate in the sentence: They reach up to 60 inches tall, or 5 feet!
1. 1 answer
2. 449 views
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
1. 2 answers
2. 782 views
Take two inputs from user:N - #items B - budget. There are S items, each with some price value, out of which user needs to
1. 0 answers
2. 559 views
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
1. 7 answers
2. 2,402 views
Can you please help with the following:x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help,
1. 1 answer
2. 387 views
A dog ate 48 bones. The other dog ate 47 bones. How much bones did both dogs eat?
1. 2 answers
2. 469 views
Can you please help with the following:x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help,
1. 1 answer
2. 301 views
what 2 colors make purple?
1. 2 answers
2. 445 views
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
1. 1 answer
2. 1,203 views
What does it mean by, "The sum of three consecutive odd integers is 93."
1. 9 answers
2. 1,024 views
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?
1. 1 answer
2. 565 views
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
1. 2 answers
2. 542 views
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
1. 2 answers
2. 418 views
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
1. 2 answers
2. 504 views
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
1. 2 answers
2. 392 views
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
1. 1 answer
2. 800 views
Is 25x squared + 40x +15 a perfect square? And how do you factor it if it is?
1. 1 answer
2. 911 views
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?
1. 1 answer
2. 392 views
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
1. 2 answers
2. 1,133 views
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
1. 0 answers
2. 1,025 views
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
1. 4 answers
2. 1,049 views
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
1. 5 answers
2. 494 views
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
1. 2 answers
2. 3,479 views
What can engineers do to help buildings survive in an earthquake?
1. 1 answer
2. 370 views
Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of
1. 6 answers
2. 2,896 views
help on the moon
1. 1 answer
2. 287 views
A student completed 44% on a test. He completed 22 question. Then how many questions are on the test
1. 3 answers
2. 493 views
The difference between my digits is 7. When you divide me by the sum of my digits, the quotient is the sum of my digits. That
1. 0 answers
2. 641 views
When you add the number of rows in my array to the number in each row, you get 15. My digits add up to 9. Which number am I?
1. 1 answer
2. 354 views
One of my factors is 5 more than another of my factors. My digits add up to 6. I am less than 50. Which number am I?
1. 1 answer
2. 350 views
If you count backward from me to divide me by 8, the sixth number you reach is 48. Which number am I?
1. 1 answer
2. 371 views
I am a perfect square that is 11 more than a perfect square and 13 less than a perfect square. Which number am I?
1. 0 answers
2. 1,009 views
I am divisible by four factors in addition to 1 and myself. I am 7 less than a number with a square array. I am less than 24.
1. 1 answer
2. 352 views
What is the portion size of a #8 scoop?
1. 1 answer
2. 471 views
What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?
1. 1 answer
2. 357 views
A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest.
1. 1 answer
2. 577 views
A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest.
1. 0 answers
2. 540 views
A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest.
1. 0 answers
2. 1,244 views
A crate with a mass of 40 kg is being dragged along a horizontal floor at a constant velocity by an applied force of 180 N. What
1. 1 answer
2. 573 views
I have to write an essay, but I just need help with coming up with some ideas.In the essay, I have to compare/contrast the plays
1. 1 answer
2. 620 views
If an arrow was shot at such an angle that for every second of travel a lateral change of 50 feet away from the archer was
1. 1 answer
2. 1,070 views
An arrow is shot vertically upward from the top of a cliff 80 feet tall, with an initial velocity of 64 ft/s, (the acceleration
1. 2 answers
2. 789 views
A gun fires a shell at an angle of elevation of 30 degrees with a velocity of 2*10^3m/s. What is the horizontal and vertical
1. 6 answers
2. 3,488 views
Pat had $3. He gets some money from his parents. He now has twice as much money as Dani. Write an expression to represent how
1. 1 answer
2. 447 views
A rectangular solid has a base area of 43.3 sq inches and a height of 50 inches a triangular prism has a base in the shape of an
1. 1 answer
2. 921 views
Estimate the population size of a bird species if in 100 sightings along a migration path, 25 were ringed, and it is known that
1. 0 answers
2. 411 views
Aaron plans to attend college once he completes this course workbook.im suppose to identify the nouns in the sentence the nouns
1. 1 answer
2. 2,308 views
Estimate the population size of a bird species if in 100 sightings along a migration path, 25 were ringed, and it is known that
1. 0 answers
2. 376 views
Verify that the expression formula for a hypergeometric distribution gives the same result as the general equation for the
1. 0 answers
2. 441 views
A box contains 14 yellow, 6 green, 10 purple, and 12 red candies jumbled together. What is the expected number of red candies
1. 0 answers
2. 1,302 views
Hey, I'm confused on this one problem and can you help me please? Thanks a bunch! :]The problem is: The figure consists of a
1. 1 answer
2. 628 views
I have a question that I don't understand from my first year chem lab.Calculate the minimum volume of water needed to decompose
1. 1 answer
2. 1,010 views
What is a motion pattern?
1. 2 answers
2. 338 views
Is this quote a metaphor?"That's a bright direction, there's a glowing there." In context it seems like a metaphor since the
1. 3 answers
2. 1,010 views
Two angles of triangle FGH measure 33 degrees and 57 degrees.What is the measure of the third angle in FGH?
1. 3 answers
2. 1,525 views
How does the formation of metallic bonds explain the fact that metals tend to conduct electricity?
1. 1 answer
2. 461 views
How does the formation of metallic bonds explain the fact that metals tend to conduct electricity?
1. 1 answer
2. 432 views
If 3 inches represent 18 miles, what do 7 inches represent?
1. 1 answer
2. 375 views
Suppose that z1=6-8i. Find:A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2,
1. 1 answer
2. 643 views
Partial Fraction of the Rational Expression:x^2+x+8/x^3+x
1. 1 answer
2. 379 views
Do you feel there are any imbalances to our wage structure in our economy? why? give an example
1. 1 answer
2. 440 views
Jim Gray invested $8,500 four times a year in an annuity due at All-Star Investments for a period of 3 years at an interest rate
1. 0 answers
2. 606 views
The 7th term of an A.p is 20 and the 13th term is 38 find the ,1,70thterm ,2,11thterm
1. 1 answer
2. 1,096 views
The 7th term of an A.p is 20 and the 13th term is 38 find the ,1,70thterm ,2,11thterm
1. 1 answer
2. 967 views
Which Christian empire in southwest Asia did the Ottomans conquered?What was the capital of the Christian Empire in southwestern
1. 1 answer
2. 567 views
A particle of mass 5 kg is acted upon by a horizontal force of magnitude 16 N for 8 seconds, in which time it moves from rest
1. 1 answer
2. 601 views
A particle of mass 5 kg is acted upon by a horizontal force of magnitude 16 N for 8 seconds, in which time it moves from rest
1. 1 answer
2. 528 views
Light travels at 3*10^8 m/s. After how many seconds can the lighting reach a distance of be heard 2310 meters away from where it
1. 0 answers
2. 445 views
The pilot of a plane looks at her speedometer to see that she is traveling at 165 km/h and she is heading north. An observer on
1. 1 answer
2. 561 views
why do scientists do experiments
1. 1 answer
2. 345 views
3.) 3x + y = -8My answer: Y=-8 + -3x 4.)2x - y = 11 My Answer: y=2x + -11 5.) 4x + -8y = 24 My answer: y = 32x + -192 6.) 15x +
1. 2 answers
2. 450 views
Check these answers? ?3x + y = -8 My answer: y=-11 2x - y = 11 My Answer: y=13
1. 2 answers
2. 417 views
how would you work this out? C=3A + 3b
1. 2 answers
2. 294 views
What are 2-3 questions that a critical reader and thinker should be asking himself or herself about logical deductive and
1. 1 answer
2. 1,090 views
I am just starting to learn algebra. My question is -2n-(9-10n)=?I have to simplify this. I think it is 8n-9 Can you please tell
1. 2 answers
2. 509 views

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