Saturday
August 1, 2015

Posts by anonymous


Total # Posts: 83,027

math
Its matrix (3 0) p-p =(-2 0) (3 0) (2 4) value of p Please show your working in matrix
July 8, 2015

math
Its matrix (3 0) p-p =(-2 0) (3 0) (2 4) value of p
July 8, 2015

ITT
A 1kg object has a potential energy of 20 J while stationary at the top of an incline. Neglecting friction, what is its speed halfway down the incline?
July 8, 2015

BUSINESS STUDIES
Q2.Discuss the problems that occur when universities and industry form joint ventures for research purposes.How have these problems been solved?
July 8, 2015

BUSINESS STUDIES
show diagram of marketing system
July 8, 2015

Physics
A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 6.0 m, y = 3.0 m, and has velocity v = 4.0 m/s + -1.0 m/s . The acceleration is given by the vector a = 4.0 m/s2 + 0 m/s2 . (a) Find the velocity vector at t = 3.0 s. ?( m/s...
July 7, 2015

Calculus AB
multiply numerator and denominator by (1/x)^(3x+1) Lim ((3+2/x)/(3+4/x))^(3x+1) so as x>>inf this reduceds to ((3/3)^3x+1) and as x>>inf = 1
July 7, 2015

Chemistry-History-ish
If I were to rewrite this paragraph, should I scratch the first sentence and add it to the bottom with a bit of change in it?
July 7, 2015

Chemistry-History-ish
Describe 3 experiments, run prior to 1930, and the types of energies/particles used to probe the structure of the atom. What did each experiment investigate? Include the names of the scientists associated with each experiment in your answer Would this be right? Prior to 1930, ...
July 7, 2015

physics
A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 6.3 m/s2; after 4.1 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant ...
July 7, 2015

pysics
A metal box attached to a small parachute is dropped from helicopter A.explain in terms of the forces acting on why its velocity increased immediately after being dropped B.why did it reach a uniform velocity after a short distance C.the total force opposing motion of the box ...
July 7, 2015

Chemistry
Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form?
July 7, 2015

statistics
Average is 8500 with a standard deviation. Of 1500 with a z score of -2.98 a z score of +1.00 what are the actual bonuses
July 7, 2015

chemistry
Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form?
July 7, 2015

Calculus
Find max or min: y = x * cosx
July 7, 2015

Chemistry
630 mm Hg
July 6, 2015

Chemistry
What are the pros and cons of using the lewis structure? What I have so far is that it shows the shape of the compound.
July 6, 2015

Chemistry-Molecular models
Select a compound and explain the advantages and disadvantages of using ball-an-stick, space-filling, and lewis structure to represent compound. What I have so far: The advantages for all the models are that you can see the shape of the atoms, but unlike the ball-and-stick and...
July 5, 2015

Physics
Can you do this using a kinematic equation approach?
July 5, 2015

Chemistry
Explain how the formulas for H2O and NaCl provide different information about the composition of these two compounds. What I think: For every 1 atom of oxygen, there are 2 atoms of hydrogen. For every one atom of sodium there is one atom of chlorine.
July 5, 2015

Psy326
Random assignment
July 5, 2015

Psy326
What is a technique for reducing carryover, practice and fatigue effects that involves varying the order of presentation between participants
July 5, 2015

Math
Veronica rolls a pair of dice twice. On both rolls, the sum is 9. Are these independent events, dependent events, or neither? Explain your answer.
July 5, 2015

Macroeconomics
Suppose in an economy the nominal money supply is $ 1000, the general price level is 4 and the real output is at its full employment level of $4000. a. what is the price level and velocity of money? b. By assuming constant velocity of money, what would you expect to see the ...
July 5, 2015

Suhaib
Solve x^n by abinitio method check ur ability nw?
July 4, 2015

trigonometry
If a ladder 40 feet long is placed so as to reach a window 30 feet high,what angel does it make with the level ground,and how far is its foot from tha base of the building?
July 4, 2015

high school
what is literature?
July 3, 2015

Math equation
A rectangle has a width w that is a 5 units longer than its lengthL. Which equation expresses the rectangle's area, A?
July 3, 2015

calc
The differential equation dy dx equals the quotient of x and y squared. will have a slope field with negative slopes in quadrant I will have a slope field with positive slopes in all quadrants will produce a slope field with columns of parallel tangents
July 3, 2015

Chemistry
A helium balloon contains 0.50 g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
July 3, 2015

Chemistry
1) Which group of elements is the least reactive? Explain why. 2) What properties distinguish metalloids from other elements? 3)Explain how to predict the charge usually observed for a monatomic ion.
July 2, 2015

Chemistry
How many GRAMS of boron are present in 3.54 moles of boron trifluoride
July 2, 2015

Math
The distance between two cities on a map is 4 inches. The actual distance between the two cities is 24 miles. What is the scale used on the map? If the scale on a different map of the same area is inch = 1 mile, how many inches separate the same two cities?
July 2, 2015

Calculus Minimum
Problem: Find minimum?maximum for: y=xa^(1/x) Ans given: X=ln(a) (min) Can't get to it.
July 2, 2015

Algebra
2*P + 3C=57 P+2C=33 double the second equation, then subtract it frm the first. 2P+3C=57 2P+4C=66 -c=-9 cost for child is 9 dollars. Now put that into the first equationo, and solve for A cost
July 2, 2015

Algebra
Calvin deposits $400 in a savings account that accrues 5% interest compounded monthly. After c years, Calvin has $658.80. Makayla deposits $300 in a different savings account that accrues 6% interest compounded quarterly. After m years, Makayla has $613.04. What is the ...
July 2, 2015

mathematics
A kilogram of rice costs $6. What is the cost of 400g of the rice.
July 2, 2015

Math
The adjacent sides of parallelogram are 26cm and 28cm and one of its diagonal is 30cm. Find the area of the parallelogram by using heron's formula
July 2, 2015

Chemistry
I know Chadwick found/discovered the neutron, but my textbook does not state what experiment he did to find it. Can someone briefly state what he did to find the atom?
July 1, 2015

Chemistry/reading
Oh I see now, thanks!
July 1, 2015

Chemistry/reading
Although Rutherford's model was highly successful, scientists realized that it was incomplete. For example, hydrogen atoms contain one proton, and helium atoms contain 2, yet a hydrogen atom has only 1/4 the mass of a helium atom. I'm not comprehending what my textbook...
July 1, 2015

Chemistry
Would this be suffice: Prior to 1930, radioactivity was discovered with three different types: alpha, beta, and gamma particles. With alpha particles, Rutherford and Chadwick were able to discover two parts of the atom: the nucleus and neutron, respectively. Rutherford did the...
July 1, 2015

Chemistry
Describe 3 experiments, run prior to 1930, and the types of energies/particles used to probe the structure of the atom. What did each experiment investigate? Include the names of the scientists associated with each experiment in your answer.
July 1, 2015

Math
A bag contains 3 red marbles, 4 blue marbles, and 5 white marbles. What is the probability of pulling out two red marbles in a row if none are replaced? A. 1/22 B. 1/16 C. 1/24 D. 1/5
July 1, 2015

Calculus Derivative
Find derivative: y= e^(x^x)
July 1, 2015

calc
y'=8x/y separation of variables... y dy = 8x dx 1/2 y^2 + C=8/2x^2 + K looks to me the general solution is y^2=8 x^2 + K check: 2ydy=16x dx dy/dx=8x/y
July 1, 2015

calc
Which of the following is the general solution of the differential equation dy dx equals the quotient of 8 times x and y?
July 1, 2015

chemistry
A sample of ammonium phosphate(NH4)3PO4 contains 3.18 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is (1)0.265 (2)0.795 (3)1.06 (4)4.00
July 1, 2015

mechanic
a can of oil 8 inches high and 8 inches in diameter .what is the approximate volume of the can?
July 1, 2015

Math
57865- +23129=48675
June 30, 2015

Math
Thank you.
June 30, 2015

Math
Margo and Carrie are trying to go to Idaho for Dawn's wedding. The probability of finding a flight for less than $400 is 1/7. The probability of Carrie making enough money babysitting to pay for her flight is 3/5. The probability of the girls being able to take time off ...
June 30, 2015

Chemistry
Thanks for the help!
June 30, 2015

Chemistry
My drawing should include a negative and positive charged plate with atoms being suspended inside with some flowing towards the negative plate and others flowing to the charge plate. Would this be suffice?
June 30, 2015

Chemistry
Draw a diagram to illustrate your explanation of how the charge of a single electron was determined. I'm suppose to draw a picture to show how they determined electrons were negative, but am unsure of what to draw for it. One of my ideas is to draw a cathode ray tube with ...
June 30, 2015

Chemistry
I probably could write a one or two page summary, but I have to condense al lot that to about 3 sentences, so rephrasing my question I guess, in the shortest way possible, how does a cathode ray tube work?
June 30, 2015

Chemistry
How does a cathode ray tube work? What I want to write: Energy is given to the cathode , thus allowing an energy beam to be crated between the positive charge on one end of the tube, and the negative charge on the other end. Can I add anymore? Also, would it be reasonable to ...
June 30, 2015

finance
100million X weighted index 1.12 = 112 million.
June 30, 2015

finance
Your program is planning to award a contract in January 2015 to purchase 100 missiles at an estimated total cost of $100 million (constant FY 2012 dollars). Currently, for Base Year 2012 in the Missile Procurement Appropriation, the FY 2015 raw index is 1.06 and the FY 2015 ...
June 30, 2015

statistics
what is the equation to figure a slope of a line?
June 30, 2015

statistics
Jesse took two data points from the weight and feed cost data set and calculated a slope, or average rate of change. A rat weighs 3.5 pounds and costs $4.50 per week to feed, while a Beagle weighs 30 pounds and costs $9.20 per week to feed. Using weight as the explanatory ...
June 30, 2015

algebra
if the perimeter of a rectangular closet is 40 ft and the width is 1 ft less than half of the length, what are the length and width ?
June 30, 2015

experiment physics
buat lab manual la tu.. cari la jwpn sendiri
June 30, 2015

experiment physics
usaha la sendiri..
June 30, 2015

BUS 303
Which of the following is NOT true about the current demographic trends in the workforce
June 30, 2015

Chemistry Subatomic particles
What data led to the need for change in Daltons ideas?
June 29, 2015

Chemistry Subatomic particles
What data led to the need for change in Daltons ideas?
June 29, 2015

Math
Andrea has 6 blue shirts, 2 red shirts, and 5 green shirts in her closet. What is the probability that she will randomly pick out a red shirt on Monday and a green shirt on Tuesday after putting the red shirt in the laundry? A. 7/25 B. 5/78 C. 7/156 D. 2/5
June 29, 2015

Mah
Adam has 4 dimes, 4 quarters and 4 nickels in his pocket. He pulls out 2 coins making sure to put the first one back in his pocket before picking the second. What are the odds that he pulls out 2 nickels? A. 1/3 B. 1/9 C. 1/16 D. 1/81
June 29, 2015

calc
The slope of the tangent line to a curve at any point (x, y) on the curve is x divided by y. What is the equation of the curve if (3, 1) is a point on the curve?
June 29, 2015

Organic Chemistry
Please help! Thank you! Alcohols can act either as weak acids or as weak bases, just as water can. Show the reaction of methyl alcohol, CH3OH, with a strong base such as Na+ -NH2
June 29, 2015

Ethics & Social Responsibilities
What is the difference between RU486 and “Plan B”? (Points : 1) RU486 cannot prevent pregnancies that have already occurred while “Plan B” can. RU486 prevents eggs from fertilizing while “Plan B” works to destroy the embryo. RU486 and “Plan B...
June 29, 2015

Ethics & Social Responsibilities
What is the difference between physician-assisted suicide (PAS) and euthanasia? (Points : 1) During PAS, patients end their own lives; during euthanasia, the doctor ends patients’ lives. During PAS, the doctor ends the patients’ lives; during euthanasia, patients end...
June 29, 2015

math
f(t) = \int_0^t \frac{x^2+11 x+24}{ 1+\cos^2(x)} dx At what value of t does the local max of f(t) occur? t = ?
June 29, 2015

Chemistry
So if I were to draw the cross section would I just draw it as so- Lead Copper ooooooo ooooooo ooooooo ooooooo ooooooo ooooooo ooooooo ooooooo
June 29, 2015

Chemistry
Then if I sketch a diagram of a cross section of the atoms of both elements, it would look the same. If they look the same then in my explanation should I say, since both diagrams are the same, the only reason that lead is denser than copper is due to the fact that lead has a ...
June 29, 2015

Chemistry
Copper and lead had different densities. Sketch a diagram at the particular nature of matter level showing the atoms of a small cross section of copper and lead. Use this diagram to explain why lead is denser than copper. I couldn't find any pictures or see anywhere in my ...
June 29, 2015

matlab
how do you write a code that prompts the user for data points that are then put into an array
June 29, 2015

Math
What is the order for 2/5, 9/10, 1/3, .50, .05 from least to greatest?
June 29, 2015

math
The income of a and b are retio 3:2and their expenditure are in the ratio 5:3 if each saves rs 2000 what is their income
June 29, 2015

business statistics
using empirical formula a company is studying the number of daily debit card purchases. THere were 20 purchases and the probability of a debit card purchase is 0.5. what is the stadnard deviation of the number of debit card purchases
June 29, 2015

calc
Find the area of the region bounded by the curves y equals the inverse sine of x divided by 4, y = 0, and x = 4 obtained by integrating with respect to y. Your work must include the definite integral and the antiderivative.
June 29, 2015

math
find volume when the region bounded by the curves y = Ln(x), y = 2, and x = 1 is revolved around the line y = −2.
June 29, 2015

calc
An object has a constant acceleration of 30 ft/sec2, an initial velocity of −10 ft/sec, and an initial position of 4 ft. Find the position function, s(t), describing the motion of the object.
June 29, 2015

Math
Unlikely
June 28, 2015

Math
Eugene lives in the desert in Arizona. What is the likelihood he will need an umbrella today? A. certain B. likely C. unlikely D. impossible
June 28, 2015

Math
Thank you.
June 28, 2015

Math
Ahmed buys two dozen eggs. As he is cooking one day he discovers that three of the two dozen eggs have double yolks! Based on this experiment, what is the experimental probability of selecting a double yolk egg from a pack of eggs? A.10% B. 12% C. 12.5% D. 25 % I think is 25% ...
June 28, 2015

Math
Thank you. I do not like this kind of questions because they are subjective. They confuse me.
June 28, 2015

Math
It is raining outside when the temperature quickly drops below freezing and stays that way for several hours. What is the likelihood that the water on the ground will turn to ice. A. Certain B. Likely C. Unlikely D. Impossible
June 28, 2015

Math
Thank you.
June 28, 2015

Math
Alice has a basket containing 6 red socks, 4 blue socks, and 12 white socks. Find the theoretical probability that Alice will randomly select a red sock from the basket. I think I have to add the number of socks to know the total and then divide 6/22. Please is this right.
June 28, 2015

Math
Thank you. I thought the same which in simple form is 4/5
June 28, 2015

Math
Christopher has scored at least 1 goal in 12 of his 15 soccer games this season. What is the experimental probability that he will score in the next game?
June 28, 2015

Calculus Partial Fraction
Sorry. The problem should have been: (x^2)/(x^3-8)(x-2)
June 28, 2015

chemistry
In the reaction of sodium metal with chlorine gas to form sodium chloride, how does chlorine form an anion? Write an equation to support your answer. I know that chlorine becomes an anion since it's gaining an electron from sodium, but how do I show that in an equation?
June 28, 2015

Math
p. 84 no.10 (from Solid Mensuration: Understanding the 3D Space book by Earnhart) Plane A which contains an isoceles right triangle forms a dihedral angle of 60 degrees with another plane B. If the hypotenuse of the triangle lies in plane B and measures 8 inches, find the ...
June 28, 2015

Calculus Partial Fraction
(x^2)/(x^3)(x-2)
June 28, 2015

chemistry
correct the following examples of gasses to standard temperature. (assume pressure is constant)(STP stands for standard temp and pressure which is 273K and 101kPa, you do no have to think about the pressure for these four but on the last three you will have to so T2 is 273K ...
June 28, 2015

algebra
Identify the variables, the variables, constant numerical and literal coeficient? 25x(fourth)+3x
June 28, 2015

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