nelson
Most popular questions and responses by nelson
physics
the magnitude of vector A is 35 units and points in the direction 325 degrees counterclockwise from the positive Xaxis. calculate the X and y components of the vector
asked on September 27, 2015 
Calculus
Function f(x) is positive, increasing and concave up on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the upper sum, lower sum, and trapezoidal rule approximations for the value of
asked on June 20, 2018 
vhem
What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 1010
asked on March 31, 2008 
Math
Why is it important to line up the fraction strips on the left?
asked on March 19, 2012 
Chemistry
(1)Make 500 ML of 4N H3PO4. How many grams will be needed? (2) In a titration procedure, 20mL of 2N solution were required to titrate 5mL of an unknown solution. What is the normality of the solution? (3) How much of a 0.01M can be made from 20mL of 6M
asked on January 30, 2017 
Physics
A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has
asked on October 3, 2011 
chem
1. What is the [K+] of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml of solution? 2. What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 1010
asked on March 31, 2008 
Physics
Draw a block and tackle system of pulleys with a velocity ratio of 5.A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distanceof 40cm at a steady rate. If the efforts is equal to 60N, determine a)d distance
asked on January 4, 2017 
Physics
A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 16.0 m/s,at an angle of θ = 51°, from the horizontal. The boy's father reaches up and catches the ball over his head,
asked on February 6, 2015 
Math
Miguel has 325 baseball cards and 272 football cards. He said that he has 597 cards in all. Is his answer reasonable? Explain using estimation.
asked on September 22, 2011 
math
a couple goes out to dinner,wchich costs $45.to the nearest dollar,what should they pay in total,if they tip 15% on the bill? 1] $45 2] $50 3] $51 4] $52 5] $53
asked on November 15, 2012 
Calculus
Find the Riemann sum for f(x) = sin x over the interval [0, 2π], where x0 = 0, x1 = π/4, x2 = π/3, x3 = π, and x4 = 2π, and where c1 = π/6, c2 = π/3, c3 = 2π/3, and c4 = 3π/2.
asked on November 7, 2016 
math
there are twice as many woman as men in the union at global products altogether 84 workers at the plant are union members.how many of them are woman? 1]28 2]32 3]47 4]56 5]61
asked on November 15, 2012 
geometry
Rectangle ABCD has diagonals AC and BD. If the diagonal lengths are AC = 36 cm and BD = (3x + 3) cm, find the value of x
asked on February 8, 2011 
university
A surfer is catching a wave. Suppose she starts at the top of a wave with a speed of 1.37 m/s and moves down the wave until her speed increases to 9.90 m/s. The drop in her vertical height is 2.64 m. If her mass is 63.3 kg, how much work is done by the
asked on November 22, 2011 
Math
SunYi estimated 270 + 146 and got 300. Is her estimate reasonable? Explain.
asked on September 22, 2011 
math
jim and alice moore decided to plant a garden with 3 hosta plants,6 lavender plants,60 tulips,and a dogwood.the cost of the plants is as follows. hosta: $3.00 each or 3 for $8.00 lavender:$ 1 00 each or 3 for $2.00 tulips:10 for $4.00 dogwood:$14.00 each
asked on November 15, 2012 
Math
How can you use a multiplication fact to find a division fact?
asked on February 11, 2012 
Biology Amylase
Hello, In our class, we are doing a hypothetical digestion of starch by amylase lab. I do not know where to begin with this following information. If I add Benedict's solution (which I know will change color when the presence of sugar is noted). After all
asked on November 4, 2007 
Law inforcement operations & Report writing
Choose 1 area within the criminal justice system, such as law enforcement, corrections, or the courts. Identify and describe specifics issues raised in dealin with mentally ill individuals by the professionals in that aspect of the criminal justice system.
asked on May 22, 2007 
math
A 200g alloy is made of copper and zinc. the number of copper atoms is 3 times that of zinc, a)calculate the number of copper and zinc atoms. b)calculate the weight of copper and zinc in the alloy. so for a) can i assume that the mol ratio is cu:zn = 3:1?
asked on April 28, 2017 
algebra
A cash register contains only five dollar and fifty dollar bills. It contains four times as many five dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,870. How many fifty dollar bills are in the cash register?
asked on February 8, 2015 
Algebra
I need help with this problem, and I think it's a perfect square trinomial problem. X^2+22+121y^2 I know 11 is the square of 121.
asked on October 18, 2014 
math
what is the least amount they could spend to purchase the plants they have chosen? 1]$62.00 2]$53.00 3]$50.00 4]$36.00 5]$28.00
asked on November 15, 2012 
physics
A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it
asked on April 11, 2012 
Math
How many vertices, edges, and faces does pyramid have?
asked on November 21, 2011 
Math
Show how the Commulatice Property of Addition works using the number 2, 3, and 5.
asked on September 20, 2011 
spanish
How do I say "sue me" in spanish?
asked on April 24, 2011 
Sequences...again
Sequence T1 is obtained by adding the corresponding terms of S(sub) and S(sub2). so that T(sub1) = {2.6, 3.39, 4.297, 5.3561, . . .}. We shall write T(sub1) = S(sub1) + S(sub2) to convey the addition of S(sub1) and S(sub2) in this way. Is T(sub1) an
asked on September 30, 2007 
ap chemistry
glycerin C3H8O is a nonvolatile liquid. what is the vapor pressure of a solution made by adding 164 g of glycerin to 338 mL of H2O at 39.8C. The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3 P solution= X solvent p
asked on January 11, 2015 
chemistry
Find the molar heat of vaporization for a substance, if 3.28mol of the substance absorbs 24.8 kJ of energy when it changes from a liquid to a gas. Answer in units of kJ/mol
asked on March 1, 2012 
Math
If two of the line segments of a polygon are parallel, what is the least number of sides it could have?
asked on November 8, 2011 
math
A number rounded to the nearest thousand is 6,000. It has a 5 in the thousands place. Name the digits that could be in the hundreds place.
asked on September 28, 2011 
Algebra
Need a formula; the product of two consecutive integers is 41 more than their sum. Find the integers.
asked on December 7, 2009 
Math
Rachel gave 1/4 of a pie to each of 5 friends. How many pies did she give to her friends in all? Write the mixed number. Ms. Fuller has 2 2/6 pies left over from her party. Write the number of pies left over as a fraction greater than 1. How do I arrive at
asked on January 8, 2013 
physics
A stone is tied to a string (length = 1.05 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the
asked on November 12, 2011 
Math
Write each missing number 3 + = 5+3
asked on September 20, 2011 
algebra
simplify 2x + 4 / 10x^2 + 24x + 8
asked on December 8, 2009 
Sequences
A = {a1, a1 + d1, a1 + 2d1, …}, B = {a2, a2 + d2, a2 +2d2, …}. Investigate whether A + B and A x B are arithmetic or geometric sequences. If an arithmetic sequence is identified, state its common difference. If a geometric sequence is identified, state
asked on September 30, 2007 
Review of Logs
I can't seem to get the answer to this; the answer key says log(base 8)6 Write as a single logarithm log(base 8)42log(base 8)3  log(base 8) 6 I'm hoping the key is wrong :) Thank you for your help!
asked on September 24, 2007 
introduction to us constitution
The 4th and 6th amendments. Why are they necessary to the criminal justice system? Identify two areas or situations in the modern world that could be benefit from a clarification or modification of these rights. Once identified can you please describe the
asked on May 22, 2007 
Math
There are 16 plants in Allison's garden.Of these, 2/8 are tomato plants. How many tomato plants are in Allison 's garden?
asked on July 2, 2017 
math
in class 2/3 of the learners do school sports.Of the learners who do sport ,3/5 play soccer.what fraction of the class plays soccer
asked on October 25, 2016 
maths
in your class 5/6 of the learners are good with mathematics.Of these 3/4 enjoy geometry.What fraction of the class enjoy geometry
asked on October 25, 2016 
Physics
Calculate the formula for coefficient of kinetic friction in an inclined plane with a pulley and two masses coonected by a rope. You can only use the weight of the two masses, the height where the second object is and the distance that the first object
asked on June 29, 2016 
number sense
I am greater than 4 tens and less than 5 tens. I have 9 Inés. What nombre I am?
asked on November 29, 2012 
math
Find the sum using mental math 24 + 71 =
asked on October 3, 2011 
English
Invent something that would make doing homework easier. Explain it 5+ sentences. Copy into paragraph format.
asked on February 3, 2010 
algebra
6m^2 + 12m + 5=0 solve for m
asked on December 9, 2009 
English textual history
What does it mean to research a textual history of a work? i.e. Hamlet's textual history
asked on December 11, 2007 
principles of microeconomics
show how a total product curve for an input can be derived from an isoquant map.
asked on November 11, 2007 
science
what is the density of a material that has a mass of 54.457g and a volume of 13.5cm
asked on October 3, 2007 
science
i know the steps but i still cant seem to write skeleton equations and balance them. can you help
asked on March 28, 2007 
BIO?
how would increase in adrenaline change blood glucose levels? Look under Actions in the body at: http://en.wikipedia.org/wiki/Epinephrine
asked on March 14, 2007 
Biology
I was wondering if you could double check my work thanks! Kidneys play a major homeostatic role in regulating body fluids. Which would not be a reasonable inference? A.
asked on March 13, 2007 
algebra
one half of a number decrease by 16
asked on July 18, 2017 
Chemisty
How many grams of HNO3 will be contained in 300 mL of a 5 N solution?
asked on January 30, 2017 
calculus
Integral High value= 4 lower value=0 f(x)dx f(x) = 2, x < 2 x, x ≥ 2 It's asking me to use geometric formulas to solve this without a shape given. What am I supposed to do?
asked on November 7, 2016 
ECONOMICS
A REPORT ON WHY THE GOVERNMENT OWNS AND CONTROLS ONLY 30% OF THE RESOURCES IN MIXED ECONOMIC SYSTEM
asked on October 30, 2016 
math
in a grade 12 ,3/4 of these class girls and 1/3 og these girls play netball. what fraction of the class plays netball
asked on October 25, 2016 
college
Maggie has 3/4 apple .She eats 1/2 of it.What fraction of the apple does eat
asked on October 25, 2016 
math
The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?
asked on September 11, 2016 
Precalculus
The width of a rectangle is 8 less than twice its length. If the area of the rectangle is 172 cm^2, what is the length of the diagonal?
asked on September 11, 2016 
Chemistry
Hello, please I need help with this excersice of chemical equilibrum. I really don't get what "1:6" means and how can I use that proportion". The excercise says: "0,014" moles of HCl are dissolved in water in a proportion of 1:6 (1 mole of HCl per 6 moles
asked on August 27, 2016 
US History
In what ways would a person's race affect his or her perspective on the war? What role did the media play in the development of popular thinking related to the war?
asked on February 2, 2016 
physical science
If the mans weight is 490N on earth,calculate his weight on the moon that has the gravitational force 1/2 of the gravitational force of the aerth
asked on February 25, 2015 
world history
Industrial revolution
asked on October 30, 2014 
L.O
PROVID RECOMMENDATIONS FOR HIV?AIDS
asked on May 5, 2013 
Math 3
How do I write a mixed number fractions greater than 1. 6/5 13/5 9/5 17/5 How do I solve it?
asked on January 10, 2013 
Total Quality Management
Find the standard deviation of 32,15,54,18,and 46
asked on December 3, 2011 
Math
Why is estimating before you subtract a good idea?
asked on October 19, 2011 
Math
Natalie has 138 DVDs and 419 CDs. If you were to estimate the sum of the DVDs and CDs, what sentence could you write? Then find your estimated sum.
asked on September 22, 2011 
math
Jill knows her average score on five tests is 88. She can find all but one test. She has tests with scores of 96,83,100, and 79. What is the missing test?
asked on April 8, 2011 
math
If an object is reflected twice over parallel lines, and corresponding points of the original and final translation image are 30 centimeters apart, how far apart are the parallel lines?
asked on March 24, 2011 
algebra
2x + 4 / 10x2 +24x + 8 simplify
asked on December 9, 2009 
homeland security
23pgs You just received intelligence that and international terrorist group has selected a major target in a major U.S. city. The terrorist are known for their hatred of capitalism and Western culture, and their intent is to wage a voilent canpaign
asked on September 25, 2007

basic electroincs
when getting the period, why did you multiple by 2?
posted on November 25, 2018 
Social Studies
BECE
posted on November 7, 2018 
mathematics
solve the questions for me
posted on November 7, 2018 
BIO chemistry
46
posted on June 4, 2018 
History
NO ITS NOT B ITS A
posted on January 11, 2018 
math
i dont know
posted on August 15, 2017 
CAT, mathematics literacy , business studies ,hist
which career should i follow
posted on January 27, 2017 
History
nojoda chica
posted on November 29, 2016 
Chemistry
Hello, thanks to answer my question. .. I was thinking about the answer because it give me a negative pH ... Is that posible? And Does the initial moles of HCl the problem (0,014) interact in something?
posted on August 27, 2016 
geometry
What is the answer to this example:The area of circle PQR with centre O is 72cmsquare.what is the area of sector POQ if POQ=40degree?(WAEC) question
posted on May 15, 2016 
math
The area of a circle PQR with centre O is 72cmsquare.What is the area of sector PQR,if angle PQR=40degree
posted on May 15, 2016 
Medical physics
A silver cube (density of silver is 10 g/cm3) with side length of 3 cm weighs more than an aluminium cube (density of aluminium is 2.96 g/cm3) with side length of 4 cm.The cubes are each suspended by a string and allowed to be completely immersed in two
posted on May 3, 2016 
US History
SpanishAmerican War. Sorry
posted on February 2, 2016 
Chemistry
.12
posted on October 5, 2015 
trig
60/theta
posted on September 16, 2014 
math
the answer was 3 that's correct thanks
posted on November 21, 2012 
math
i need your help pleaseeee
posted on November 21, 2012 
math
THANKS
posted on November 15, 2012 
math
i got it the answer 3 $ 50 thanks
posted on November 15, 2012 
math
for car is spend $138 for food $302 for miscellaneous it spend $ 460 for housing $498 for utility $90 for tax $362. question 1] was 4 [2] 5 [3] 9 [4] 5 [5] 50
posted on November 15, 2012 
math
3 its not correct
posted on November 15, 2012 
math
i am not sure ms sue
posted on November 15, 2012