Friday

October 9, 2015
Total # Posts: 85,740

**changing**

If for a sequence (tn),sn=2n²+5n,find tn and show that the sequence is an a.p
*July 10, 2015*

**Physics**

Add the two components... Et=E1+E1=k4/20^2+k10^2/8^2 negative sign points to minus x axis, so in this case, E is to the right
*July 10, 2015*

**physics**

pressure=force/area=1.5g/.2x.26 Newtons
*July 10, 2015*

**Maths**

there will be no constant term.
*July 10, 2015*

**Physics**

Net north: 3KM net ease 3KM direction=NE magnitude: sqrt(3^2+3^2)
*July 10, 2015*

**Physics**

net north 5Km net East 12 Km distance=sum=17km displacement: sqrt(5^2+12^2) in direction arc tan (5/12) E of N
*July 10, 2015*

**Maths**

hello
*July 10, 2015*

**chemistry**

A 250 mL sample of gas at 1.00 atm and 20oC has the temperature changed to 40oC and the volume changed to 500 mL. What is the new pressure?
*July 9, 2015*

**Chemistry**

Yeah it was a typo, there's been a lot of them on my sheet for some reason.
*July 9, 2015*

**Chemistry**

Also, if H2PO2 is tripled, how does that correspond to H2PO, since they're both different compounds? I understand how doubling OH will quadruple it in the rate, I just don't understand how the other go hand in hand.
*July 9, 2015*

**Chemistry**

If it was a qualitative question, how would the question above be reformatted to fit it?
*July 9, 2015*

**Chemistry**

The hydroxide ion reacts with the H2PO2 ion according to the following equation: OH^- + H2PO2^- > HPO2^-2 + H2 The rate law for this reaction rate is R=k[OH^-]^2[H2PO^-2]. What will be the change in the reaction rate if the H2PO2 ion concentration is doubled. What will the ...
*July 9, 2015*

**Science**

So NO will be doubled in the rate and O3 will be tripled.
*July 9, 2015*

**Science**

The rate law for the reaction NO + O2 > NO2 is R=k[NO][O2]. what will be the effect on the reaction rate if the partial pressure of NO is doubled? What will the effect be if the partial pressure of O2 is tripled? My answer: More NO2 would be produced if NO was doubled. If ...
*July 9, 2015*

**Calculus Partial Derivatives**

y=F(x+at) + f(x-at) y=F(w) + f(v) (w=x+at, v=x-at) don't see how to get from here to partial derivative y with respect to t = F"(w)a^2 + f"(v)a^2
*July 9, 2015*

**Physics**

so would it be (2)(9.0e9)(4.64)(Q)/0.707^2
*July 9, 2015*

**statistics**

u=100 and standard deviation of P=20. error between sample mean and population mean of n=16 is 5 points and error between sample mean and population mean for a sample of n=100 is 2 points. explain
*July 9, 2015*

**Science**

Given the following equation: N2 + Cl2 > @ NCL3 H=+230 kJ a) What mass of N2 would absorb 96.5 kJ of heat as it reacts? b) What volume of Cl2 at STP would be required to react with the N2 in part (a)? I do not know how to solve this problem. My mindset is that it involves ...
*July 9, 2015*

**Chemistry**

How is the enthalpy change for a reaction related to the enthalpy of the reactants and products? Is it that the enthalpy for the reactants and products equals the enthalpy change for the reaction?
*July 9, 2015*

**physics**

Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 ´ 109 N·m2/C2)
*July 9, 2015*

**English**

ok, thank you so much :]
*July 9, 2015*

**English**

my assignment is to look for aticle that is related to Papa, the philosopher
*July 9, 2015*

**English**

Papa, the philosopher is a short story of Leo Buscaglia its about a boy who was descriminated for what he is ...
*July 9, 2015*

**English**

can you give me an articles about racism, bullying or etc .. that is related to Papa, The philosopher ???
*July 9, 2015*

**Anthropolgy**

Which of the following is NOT a common result of culture contact?
*July 9, 2015*

**Physics**

A particle travels along the x axis with a constant acceleration of +2.7 m/s2. At a time 4.2s following its start, it is at x = -108 m. At a time 5.7 s later it has a velocity of +13.0 m/s. Find its position at this later time. Please use kinematic equations to solve.
*July 9, 2015*

**Physics**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 30 m apart. The train on the left accelerates rightward at 1.17 m/s^2. The train on the right accelerates leftward at 1.1 m/s^2. (a) How far does the train on the left travel ...
*July 9, 2015*

**Physics**

Two cars are traveling along a straight road. Car A maintains a constant speed of 79 km/h and car B maintains a constant speed of 114 km/h. At t = 0, car B is 36 km behind car A. (a) How much farther will car A travel before car B overtakes it? ? km (b) How much ahead of A ...
*July 8, 2015*

**ENG 125**

What does literature offer an individual? What causes people’s perceptions regarding the value of literature to change?
*July 8, 2015*

**Physics**

I really need help with this problem and I honestly have no clue how only knowing the force and weight will help find the tension if there is no friction.
*July 8, 2015*

**Physics**

The figure is just an inclined plane with two weights, both with a mass of 10kg but labeled M1 and M2 that are attached by a string. The pully is on the top point of the inclined plane and one weight is resting on the inclined plane with the other is hanging off the top point ...
*July 8, 2015*

**Physics**

Two objects are connected by a massless string, as shown in the figure below. The incline and pulley are frictionless. (a) Find the acceleration of the objects. (Assume that positive acceleration is to the right for m1 and downward for m2. Answer using m1 for m1, m2 for m2, g ...
*July 8, 2015*

**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*

**LIFE SCIENCES**

So that people can see them
*July 8, 2015*

**BUSINESS communication**

in a communication context what is meant by sharing meanings?
*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*

**Physics**

(a) 4.6x10^-14
*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*

**science**

I dont know.
*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*