Tuesday

September 27, 2016
Total # Posts: 952

**Chemistry**

I still dont understand what to do after setting the K= pO2^(3/2). What do you substitute into the O2?

*April 6, 2012*

**algebra**

Participants in a psychology experiment were able to memorize an average of M words in t minutes, where M = −0.001t3 + 0.1t2. Use the following graph.Estimate the number of words memorized after 14 min. m 20 / 18 / 16 / 14 / 12 / 10 / 8 / 6 / 4 / 2/02468101214161820t

*April 5, 2012*

**math**

Determine the water level inside a tank that has a diameter of 40 feet and contains 180,000 gallons of water?

*March 26, 2012*

**RUBY MS**

what is 8.3% of 132,000,000

*March 23, 2012*

**Physics**

A 83-kg fisherman in a 122-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.7 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat ...

*March 19, 2012*

**Physics**

An object has a kinetic energy of 244 J and a momentum of magnitude 24.9 kg · m/s. (a) Find the speed of the object. (b) Find the mass of the object.

*March 19, 2012*

**Chemistry**

my deltaGf was dGf=290.4kJ/mol i got K=1.69e18 as my answer and it was correct. still getting the equation wrong though :/

*March 14, 2012*

**math**

nicks class has 30 students. 2/5 of his class sings in the school chorus. how many students sing in the chorus?

*March 13, 2012*

**physics**

hb h

*March 12, 2012*

**english 11**

Its right

*March 9, 2012*

**Finance**

Suppose your bank account will be worth $4,200.00 in one year. The interest rate (discount rate) that the bank pays is 5%. What is the present value of your bank account today?

*March 7, 2012*

**Finance**

Suppose your bank account will be worth $4,200.00 in one year. The interest rate (discount rate) that the bank pays is 5%. What is the present value of your bank account today?

*March 7, 2012*

**chemistry**

Constitutional isomers have the same molecular formula but different atom connectivity. Conformational isomers have the same molecular formula and the same atom connectivity but different spatial arrangements due to rotation about single bonds. The answer is true.

*March 4, 2012*

**Physical Chemistry**

Calculate the value of the change in enthalpy(H) when the temperature of 1 mole of a monatomic gas is increased from 25C to 300C.

*March 4, 2012*

**algebra**

how to make a 4x4 magic sqaure which equals 18

*February 27, 2012*

**Physics**

The string of a conical pendulum is 54.5 cm long and the mass of the bob is 0.22 kg. a) Find the angle between the string and the horizontal when the tension in the string is three times the weight of the bob. b)Under those conditions, what is the period of the pendulum?

*February 26, 2012*

**Physics**

A mass m1 on a horizontal shelf is attached by a thin string that passes over a frictionless pulley to a 2.5 kg mass (m2) that hangs over the side of the shelf 1.2 m above the ground. The system is released from rest at t = 0 and the 2.5 kg mass strikes the ground at t = 0.82 ...

*February 26, 2012*

**physics**

,bjj

*February 23, 2012*

**chemistry**

12.2

*February 22, 2012*

**Physics**

(b) What is the acceleration of the ball if an upward force of 64 N is applied?

*February 20, 2012*

**math**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

*February 16, 2012*

**biomechanics**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

*February 16, 2012*

**physics**

A tiger leaps horizontally from a 15.0 m high rock with a speed of 7.10 m/s. How far (in meters) from the base of the rock will it land? so using the equation h=1/2 gt^2 and i put in 15 for h and g is 9.8 so i solve for t. is this right and when do i use the 7.10 m/s

*February 14, 2012*

**physics**

so does that mean vf is zero, vi is 29.69848481, and g is 9.8

*February 14, 2012*

**physics**

A golfer drives a ball with a velocity of 42 m/s at an angle of 45 degrees above the horizontal. What is the maximum height (in meters) of the ball above the level fairway?

*February 14, 2012*

**physics**

so h is 15, g is 9.8 15= 4.9t^2 then take the square root of 3.061. then do i multiply by 15?

*February 14, 2012*

**physics**

is g negative or positive, because that is what i did and the answer is still wrong!

*February 14, 2012*

**goverment**

Federal regulatory agencies have responsibility primarily in the area of

*February 13, 2012*

**Physics**

A circular automobile racetrack is banked at an angle theta such that no friction between road and tires is required when a car travels at 28.0 m/s. If the radius of the track is 390 m, determine theta .

*February 11, 2012*

**calculus**

Parametrize the curve of intersection of x = -y^2 - z^2 and z = y.

*February 8, 2012*

**Chemistry**

What is the empirical formula if given c-.1929 h-.01079 o-.08566 cl-.1898

*January 30, 2012*

**chemistry **

The electrochemical cell described by the balanced chemical equation has a standard emf (electromotive force) of -4.05 V. Calculate the maximum electrical work (kJ) the cell has done if 6.8500 mol of F2(g) (Molar Mass - 38.00 g/mol) forms. Round your answer to 3 significant ...

*December 4, 2011*

**Chemistry**

Thank you so much :)

*December 3, 2011*

**Chemistry **

If the initial concentration of NH3(g) is 4.643 mol/L, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kc at 773.0 K is 16.70. The initial concentration of the reaction products is 0 mol/L. 2NH3(g) = ...

*December 3, 2011*

**Economics**

idk

*November 29, 2011*

**Physics 1**

12000j

*October 20, 2011*

**math**

112-49=63 63/(7+7) = 63/14 =4.5 4.5+ (8-2)^2 4.5+ 6^2 40.5 jeeze this was easy,how old are you, 3??

*October 19, 2011*

**physics**

you can use the max height for parabloic path equation.look it up on google you lazy bum!

*October 19, 2011*

**physics**

the answer is dragonballs....simple as that.

*October 19, 2011*

**Science**

When plants die, what happen to carbon dioxide? They would be more co2 or less?

*October 18, 2011*

**Math**

Round 50.4 square miles to the nearest Square mile

*October 13, 2011*

**Science (Chemistry**

ad

*October 11, 2011*

**Math**

Construct a grouped frequency distribution for the following 28 scores using a class width of 4: 64 63 58 46 52 62 47 49 56 47 43 41 45 51 60 62 51 61 50 55 56 53 54 58 48 48 58 46

*October 10, 2011*

**physicsssss**

1- d= 270 2- speed= 73

*October 9, 2011*

**physics**

-2.7 cm/s

*October 9, 2011*

**Physics 1**

A mass of 5.2 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 29 Newtons. If the length of the incline is 78 meters and the mass is originally at rest at the top of the incline and then released, how long does ...

*October 4, 2011*

**Physics 1**

A mass of 5 kg lies on a frictionless, horizontal floor. A force of 135 Newtons is applied to the mass at an angle above the positive x axis and a force of 14 Newtons is applied to the mass at an angle of 22.8 degrees below the negative x direction (see sketch). If the angle ...

*October 4, 2011*

**chemistry**

What is the specific heat capacity of a metal if it requires 176.1 J to change the temperature of 15.0 g of the metal from 25.00°C to 30.00°C?

*October 4, 2011*

**simplify**

23.68 ÷6.4 3.7

*September 28, 2011*

**math**

three men and their wives were given $5400. the wives together received $2400. sue had $200 more than jan, and ellen had 200 more then sue. who was married to whom?

*September 28, 2011*

**math**

a box of munchkins contains chocolate and glazed donut holes. if Gloria ate 2 chocolate , then 1/11 of the remianing munchkins would be chocolate. if she added 4 glazed to the box, 1/7 of the box would chocolate. how many munchkins are in the original box?

*September 28, 2011*

**math**

peg spends $7.50 a week for grapefruit. When grapefruit are out of season, she gets 1 fewer grapefruit than when they are in season. If the price decreases by $3 per dozen in season, how many dollars will it cost her to buy a dozen grapefruit out of season?

*September 28, 2011*

**Physics help!**

F= ma= Tension-Weight ma+Weight=Tension (4125kg)(0.0300 * 9.8)+ (4125kg)(9.81)=Tension Calculate and this will give you the answer for maximum force. For part (2) You have to subtract them (ma-weight)

*September 26, 2011*

**geometry**

This circle has a circumference of 56. What is the radius of the circle?

*September 21, 2011*

**hw help**

420

*September 13, 2011*

**math**

describe all the numbers when rounded to 312,000

*September 8, 2011*

**MATH**

USING AM IMAGINARY FIGURE OF $19,250.00 AS AN ANNUAL INCOME FIGURE, HOW MUCH MONEY COULD YOU SAVE A YEAR IF YOU BUDGETED HALF OF 2.4%?

*September 7, 2011*

**math**

You have 2 floors, and there are 14 steps inbetween the two floors. you have a cat that can get to the top by either taking one step at a time or two steps. ( at one time going up the cat can take both one or two steps). How many possible combinations are there for the cat to ...

*September 2, 2011*

**geometry**

Given ABCD, solve for x.

*August 30, 2011*

**geometry**

Line e bisects line xy at m and divides line xy into two equal parts. name a pair of congruent segments.

*August 24, 2011*

**chemistry**

sorry. The reaction is: 2 NO(g) + Cl2 ---><--- 2NOCl deltaH is the heat of reaction deltaS is the change in entropy T is temperature in kelvin deltaG is a direct measure of spontaneity DeltaH (kJ/mol) 2NO= 90.29/mol DeltaH (kJ/mol) Cl2= 0 DeltaH (kJ/mol) 2NOCl= 51.71/mol...

*August 1, 2011*

**chemistry**

Gibbs free energy What is the equilibrium constant at 25 C? deltaG= deltaH - (T(K)+deltaS) deltaS= -121.1 deltaH= -77.36 so at 25 C deltaG = -77.36 - (298*(-121.1)) deltaG ~ 3.6*(10^4) so my question is: what *is* the equilibrium constant, or perhaps more accurately, how does ...

*August 1, 2011*

**rate of reaction (formatted repost)**

I can't get my table to line up so I've surrounded the values in curly brackets. Experiment [SO2]i [O2]i IRD O2 {1} {0.05} {0.05} {7.3*[10^(-2)]} {2} {0.10} {0.05} {2.9*[10^(-2)]} {3} {0.10} {0.15} {2.6*[10^(-1)]} {4} {0.12} {0.12} {?????????????} so overall oreder is ...

*July 20, 2011*

**rate of reaction**

What is the initial rate of *appearance* of SO3(g)? a reaction and table are given: reaction: 2S02(g)+O2 -------> 2 SO3(g) Table note: i= initial, IRD= initial rate of disappearance; concentrations given in molarity (M) IRD given in M/s. Experiment [SO2]i [O2]i IRD O2 1 0....

*July 20, 2011*

**Social STUDIES**

Deez nutz

*July 7, 2011*

**math**

Express the volume of a rectangular solid (box) whose height, width and length are x,2x and 3x, respectively, as a function of its width.

*July 1, 2011*

**Psychology **

While all four are definitions of a mental disorder, the correct answer is D.

*June 28, 2011*

**physics**

a driver releases an air bubble of volume 2.0 cm^3 from a depth of 15 m below the surface of a lake where the temperature is 70C.

*June 21, 2011*

**chemistry**

13.88 mol oxygen

*June 3, 2011*

**Education**

So are the answers B, and D

*May 9, 2011*

**Chemistry**

121 atm

*May 2, 2011*

**chemistry**

Is there a relationship between HOMO & LUMO and bonding & antibonding? Explain.

*April 18, 2011*

**PHYSICS**

Its actually FFTF, thanks for the help

*April 15, 2011*

**PHYSICS**

A) As a wind instrument warms up, the resonant frequencies of the instrument tend to slightly decrease. B) If the air in a concert hall warms up, the resonant frequencies of the string instruments will change precisely the same as the resonant frequencies of the wind ...

*April 15, 2011*

**calculus**

A rectangular box is to be constructed from two different materials. The box will have a square base and open top. The material for the bottom costs $4.25/m2. The material for the sides costs $2.50/m2. Find the dimensions of the box with the largest volume if the budget is $...

*April 9, 2011*

**math**

A circular pie with a diameter of 9.8 inches is cut into 7 equal slices. What is the approximate area of one slice?

*March 31, 2011*

**math**

Denisha used 9 balls of clay and 16 straws to make a solid pyramid.how many faces does the solid have?

*March 29, 2011*

**physics**

An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object.

*March 28, 2011*

**math**

What is the degree of the 3rd angle if the other two are 68 degrees?

*March 28, 2011*

**Math**

20(1/5n - 3/4) + 9n

*March 22, 2011*

**physics**

0.35

*March 20, 2011*

**Financial Management**

500

*March 6, 2011*

**coordinate geometry**

all i gotta do is find slope & y intercept this is 6th math

*March 3, 2011*

**coordinate geometry**

some smart person solve thiss ;] y-18x+18=4 or help me im confused

*March 3, 2011*

**chemistry**

The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a short paragraph discussing your evidence for this rule. Include in your discussion where you think this rule works best and where it seems to ...

*February 27, 2011*

**Physics**

A 55.0 kg girl is roping through the top of a tiny tree. She quickly swings down from her 12.0 m high perch and grabs a 21.0 kg dog as she swings. They barely swing back up to a tree limb. How high is this tree limb?

*February 15, 2011*

**physics-mechanics**

A high-speed test track for cars has a curved section — an arc of a circle of radius R = 1440 m. The curved section is banked at angle a = 19.1 degrees from the horizontal to help the cars to stay in the road while moving at high speeds. The acceleration of gravity is 9.8...

*February 12, 2011*

**Math**

Need help solving this problem. If there's an equation at the end, need help in how to solve that also. Compounded interest problem. Principal $825. Rate 4%. Compounded Annually. Time 10 years.

*February 9, 2011*

**j**

What were the factors that played a significant role in the collapse of Russian control over Eastern Europe?

*February 7, 2011*

**arithmetic**

How do I solve these questions? 3 1/3 - 2 2/5= 2.75 + .003 + .158 = 7/20 is equal to ? What is the value of the expression 2x2+ 3xy – 4y2 when x = 2 and y = - 4? 16x - 8 = If 2x – 3(x + 4) = - 5, then x = – 3(5 – 6) – 4(2 – 3) =

*February 3, 2011*

**Calculus**

find lim f(x) - lim f(x) x->infinity x->-infinity if f(x)=ln (x+sqrt[x^2+a^2])/(x+sqrt[x^2+b^2]) a and b are real numbers

*February 2, 2011*

**Calculus**

find lim f(x) - lim f(x)

*February 2, 2011*

**Physical Science**

If a person is traveling at a rate of seventy five miles per hour in a straight line, how far would they travel in three seconds?

*February 1, 2011*

**Physics**

A watch manufacturer claims that its watches gain or lose no more than 8s in a year.

*February 1, 2011*

**comm**

extra is a adjective right???

*January 18, 2011*

**comm**

envelope-adverb credit-adjective spent-adverb

*January 18, 2011*