# Posts by Megan

Total # Posts: 1,189

Science
A chemist is studying the following equilibrium: 2Pb(NO3)2 (s) ! 2PbO (s) + 4NO2 (g) + O2 (g) He starts out with 10 g of Pb(NO3)2 and, at equilibrium, has 2.02 g of PbO. The concentrations of NO2 and O2 at equilibrium are 0.25 M and 0.019 M, respectively. What is the value of ...

Science
Three acids solutions have the following pH: Solution A: pH = 2 Solution B: pH = 5 Solution C: pH = 3 Which solution is made with the acid that has the smallest ionization constant?

Physics
A 3 kg block is being pulled by a string at a constant speed on a surface with a coefficient of kinetic friction of 0.3. If the string is at an angle of 30 degrees with the horizontal, what is the magnitude of the force necessary to pull the block?

math
ohh that makes sence! thank you!!

math
-1/7 divided by -4

math
how to solve it

math
3+5x+(-3)

accounting
What kinds of problems could be created in a financial report is not reliable, relevant, consistent or comparable?

Chemistry
what is my percent yield if i had 1.46 grams of copper to start with and ended with 2. 47 grams of copper?

calculus
Sketch the region bounded by the curves y = x^2, y = x^4. 1) Find the area of the region enclosed by the two curves; 2) Find the volume of the solid obtained by rotating the above region about the x-axis; 3) Find the volume of the solid obtained by rotating the above region ...

Managerial Economics
Assume the only choice variable is total benefit function is B(x) = 170x-x², and cost function is C(x) = 100-10x + 2x². a. What are the marginal benefit and marginal cost functions? b. Set up the net benefit function and then determine the level x that maximises net ...

Math
t - (-4) = 18

math
What are five points in which the x-coordinate and the y-coordinate are opposites?

Math
Expand (2x+5y)^6

Math
The square root of 27b 11 squared ( square root 27^11)

Algebra II
(6x4 +4x3 - 2x2 +5) - (3x4 - 2x3 +x+4)

Essay titles
If you are writing an essay, and in the title of your essay, you have the title of a novel, does the title of the novel have to be italicized? For example, if you were writing an essay (MLA format)titled A New Perspective on The Scarlet Letter, would The Scarlet Letter need to...

Chemistry
495

physics
f a typical family of four uses electric energy at an average rate of 458 W, how many kWh would their electric bill be for one month? Answer in kW

Math
explain what the values of m and b in your equation tell about the relationship between number of containers to be recycled and attendance at the school event

freedom similes and metaphors?
Freedom is the canvas in life and you are the paint and brush

geometry
A right circular cylinder has an altitude of 11 feet and a radius of 5 feet. What is the lateral area, in square feet, of the cylinder, to the nearest tenth?

Human Growth and Development
Sorry. I posted them and I don't know why it didn't show up but here they are again! #1. b #2. b Thank you!

Math
the height of a new home is going to be 74 feet. if the height of the home in a scale drawing is 9.25 inches, what is the scale used?

Communications
Explain the impact and use of jealousy in interpersonal relationships.

Math
The following data show the number of Chinese citizens who immigrated to the U.S. Use the data to predict how many Chinese immigrated to the U.S. during the 1990. Decade No. of Chinese Immigrants 1950s 10,000 1960s 35,000 1970s 124,000 1980s 389,000

PHYSICS
A nuclear reactor contains nuclei that fission when bombarded by slow neutrons. The fission reaction produces fast neutrons which need to be moderated (i.e. slowed down) in collisions before they can cause further fissions. In this problem we consider a reactor which uses ...

Math
A company contributes \$170 per month into a retirement fund paying 4.20% compounded monthly and employees are permitted to invest up to \$ 2,800 per year into another retirement fund which pays 4.20% compounded annually. How large can the combined retirement fund be worth in 29...

chemistry
What is the percent yield of the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2 if 40. g of water are actually recovered?

chemistry
how do you calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2?

Math
A company contributes \$170 per month into a retirement fund paying 4.20% compounded monthly and employees are permitted to invest up to \$ 2,800 per year into another retirement fund which pays 4.20% compounded annually. How large can the combined retirement fund be worth in 29...

Math
How much did you invest at 9% compounded bi-weekly if 10 years later the investment is worth \$54,000?

6th grade math
I am still stumped on this question... What should I divide 216 by?

Money
77 nickels 385 pennies No other possibilities with one type of coin

Math
i want to spend 62¢ by only using 4 coins which are 25¢, 10¢, 5¢, 1¢ what are 2 ways I can spend it?

Physics please help!!
Water is flowing in a straight horizontal pipe of variable cross section. Where the cross-sectional area of the pipe is 3.50·10-2 m2, the pressure is 5.30·105 Pa and the velocity is 0.310 m/s. In a constricted region where the area is 12.90·10-4 m2, what ...

science
If latitude were the only control of temperature, the isotherms would run straight across the maps from east to west. Describe one region of the world where this hypothetical isotherm pattern is actually observed and Why.

Physics please help!!
Suppose you pour water into a container until it reaches a depth of 30.2 cm. Next, you carefully pour in a 14.8 cm thickness of olive oil so that it floats on top of the water. What is the pressure at the bottom of the container? Assume 1000 kg/m3 and 901 kg/m3 for the density...

math
what is the difference of 8 and the quotion of 5

Physics
Top and Bottom??

Physics
I'm confused about what A should be then? Is that what I'm solving for? I thought I was solving for pressure?

Physics
A water tower is filled with fresh water to a depth of 6.38 m. What is the water pressure at a depth of 3.96 m?

Physics please help!!
So F1/2.15E-5=1072N/2.4E-3 F1= 2.15E-5*(1072/2.4E-3) F1=9.63E10 N I think I did this right but the answer comes up wrong when I submit it

Physics please help!!
Is the 1072N=F2?

Physics please help!!
Piston 1 has a diameter of 0.524cm Piston 2 has a diameter of 5.64 cm. In the absence of friction, determine the force required on piston 1 necessary to support an object, m, with weight 1072 N. (Neglect the height difference between the bottom of the two pistons, and assume ...

Physics
The four tires of an automobile are inflated to a gauge pressure of 1.84E+5 Pa. Each tire has an area of 0.0237 m2 in contact with the ground. Determine the weight of the automobile.

Physics please help!!
A 73.5 kg person sits on a 3.20 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.74 cm in diameter. Calculate the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.

Physics please help!!
The mass of a star is 1.49·1031 kg and it performs one rotation in 26.1 days. Find its new period (in /days) if the diameter suddenly shrinks to 0.59 times its present size. Assume a uniform mass distribution before and after.

Stats
if 5% of all calculators are defective, find the mean, variance, and standard deviation of a lot of 400 calculators. round your final answer to two decimal places if necessary.

Physics please help!!
A 1.94 kg solid sphere (radius = 0.105 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.710 m high and 5.17 m long. When the sphere reaches the bottom of the ramp, what is its total kinetic energy?

Physics
After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of v = 3.41 m/s To reach the rack, the ball rolls up a ramp that rises through a vertical distance of h = 0.529 m. What is the linear speed of the ball when it ...

Physics please help!!
A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

Physics please help!!
A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

Physics please help!!
A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

Physics please help!!
How much work must be done to accelerate a baton from rest to an angular speed of 7.27 rad/s about its center? Consider the baton to be a uniform rod of length 0.529 m and mass 0.478 kg

Math
Converting 60 percent into A fraction in simplest form

Physics
I'm still confused on how the find the center of the student's mass though????

Physics
To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 2.40 m apart If the left scale reads 278 N, and the right scale reads 116 N, calculate the student's mass. Calculate the distance from the student'...

Physics please help!!
A school yard teeter totter with a total length of 5.46 m and a mass of 35.9 kg is pivoted at its center. A 17.7 kg child sits on one end of the teeter totter. Where should a parent push with a force of 272 N in order to hold the teeter totter level?

geometry
bisects and is perpendicular to line segments and . = 96 inches, and line segment = 52 inches. What is the length of ?

PHYSICS tension & angle
A van accelerates down a hill (Fig. P4.71), going from rest to 30.0 m/s in 6.70 s. During the acceleration, a toy (m = 0.250 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling. Find theta Find tension...

physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25. Determine the change ...

Statistics
A random variable X is normally distributed with ì = 60. Convert the value of X to a z-score, if the standard deviation is as given. X = 60; ó = 7 A) 7 B) 1 C) 60/70 D) 0

Statistics
A random variable X is normally distributed with ì = 60. Convert the value of X to a z-score, if the standard deviation is as given. X = 60; ó = 7 A) 7 B) 1 C) 60/70 D) 0

Math
Suppose that y≤3x, 2x≤y and 1/3x+1/3y≤1 together with 0≤x, 0≤y. Determine a value of k so that the function f(x,y)=kx+y has a positive maximum value on the region at two corners. ANS: k= ?

Math
Suppose that y≤3⁢x, 2⁢x≤y and 13⁢x+13⁢y≤1 together with 0≤x, 0≤y. Determine a value of k so that the function f(x,y)=kx=y has a positive maximum value on the region at two corners. ANS: k= ?

chemistry
How many grams of oxygen are required to produce 56.0 g water vapor?

math
x/4-4=3x/4-6 plz show step by step

math
x/2-4=-5

chemistry
what is my percent yiel if i had 1.46 grams of copper to start with and ended with 2. 47 grams of copper?

Statistics
The probability that a house in an urban area will develop a leak is 5%. If 82 houses are randomly selected, what is the probability that none of the houses will develop a leak? A) 0.050 B) 0.001 C) 0.000 D) 0.015

Physics please help!!
A 60cm diameter bike wheel starts at rest and develops an angular speed of 12.0 rad/s in 10 seconds. What linear distance does the bike travel?

science
its not my work its something i simply don't understand at all and what the like questions are exactly asking?

science
Imagine that you are riding a bus. A girl gets on, and you recognize her as someone you know but have not seen for two years. 1. What are the roles of the central nervous system and the peripheral nervous system in allowing you to recognize the person and remember who she is? ...

Math
Three(cylindrical) steel drums are put together and a steel band is wrapped tightly around the three drums. If the radius of each drum is 2 feet, what is the length of the steel band? (The view of the drums below is from the top, or end of the drums.) The three drums are in a ...

Physics
The wheel has a radius of 4.89m

Physics
How far does a point on the circumference travel if the wheel is rotated through an angle of 28.6 rads?

pre-calc
(3^-2+4^-2)^-1/2

pre-calc
(3^-2+4^-2)^-1/2

Physics
How many calories of heat will a person lose by evaporating 1250g of water and perspiration in a day?

Are their any Physics tutors on here tonight?!
A cart of mass M1 = 6.00 kg and initial speed = 4.00 m/s collides head on with a second cart of mass M2 = 4.00 kg at rest. Assuming that the collision is elastic, find the speed of M2 after the collision.

Are any tutors helping with Physics tonight? Help!
A cart of mass M1 = 6.00 kg and initial speed = 4.00 m/s collides head on with a second cart of mass M2 = 4.00 kg at rest. Assuming that the collision is elastic, find the speed of M2 after the collision.

Science
Does the question give you an example or information of what you need to make the genotype of?

math
you have a set of flashcards 1-36. a card is chosen at random. find the odds in favor of and against each selection. 1. multiple of 3 2. prime # 3. mutliple of 2 or 3 4. mutliple of 2 and 3 5. only 1 digit 6. has more than 1 digit

math
you have a set of flashcards 1-36. a card is chosen at random. find the odds in favor of and against each selection. 1. multiple of 3 2. prime # 3. mutliple of 2 or 3 4. mutliple of 2 and 3 5. only 1 digit 6. has more than 1 digit

english
Read the faculty’s rubric comments and the Turnitin® report provided in Appendix D. Write one paragraph of at least 200-words explaining what the student could have done differently to avoid the plagiarism concerns raised by the faculty member. How could the use of ...

Physics please help!!
High speed stroboscopic photographs show that the head of a 188 g golf club is traveling at 52.5 m/s just before it strikes a 45.5g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 44.0 m/s. Find the speed of the golf ball just ...

consumer economics
I"m not sure it doesn't say if it's annual.

consumer economics
Phonecia deposits \$300 into a simple interest account that pays 3%. After 7 months what will be the total value of her account? A.\$309.00 B. 305.25 C. \$321.00 D. \$9.00

math 8th please help
i thought that was probability...... sorry i must have messed up big time on my homework then

math 8th please help
a teaher chooses a student at random from a class of 10 boys and 15 girls. Find the odds favor of and for the odds against each event. 1. choosing a girl 2. choosing a boy i don't understand what the odds of something would be

math
a teaher chooses a student at random from a class of 10 boys and 15 girls. Find the odds favor of and for the odds against each event. 1. choosing a girl 2. choosing a boy i don't understand odds of something please help.........

Physics please help!!
A 86.0 kg diver falls from rest into a swimming pool from a height of 6.30 m. It takes 1.86 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.

Physics please help!!
A 30.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 18.00 m. When she is partway down the slide, at a height h2 of 9.00 m, she is moving at a speed of 9.30 m/s. Calculate the mechanical energy lost due to friction (as heat, etc.).

math (8th grade)
thank-you 4 the help

math (8th grade)
The length of each piece in a model train railroad built on the HO scale is 1/87 of the actual length. Another popular model is the N scale, for which the scale is 1/160. Each car on a full-size passenger train is 80ft long. What is the length in inches of a model passenger ...

math
If the O scale (model train question) is 1/48 the acutal length. An O-scale locomotive is 1.05ft long. How long is the actual locomotive?

Modern World Studies
Okay thanks!

Modern World Studies
Okay thank you!

Modern World Studies
Can someone please hurry and help me? I don't really understand this lesson. & I am taking a test on it.

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