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Total # Posts: 109,260

Physics
An electron moves to the left with a velocity of 3.2 x 10^5 m/s and has a magnetic force of 5.6 x 10^-17 N exerted on it. What is the magnitude of the magnitude field? Assume the charge has a value of 1.60 x 10^-19 C.

Social Studies
How do nearby businesses with similar products usually compete? (1 point) A. offering deals and low prices B. changing to different product types C. lowering the level of service to save costs D. establishing a minimum price for everyone to use

geometry
Lateral area does not include the base, so we want the total area of just the four triangles that make up the other faces. These triangles are isosceles and congruent to one another, since this square pyramid is regular. Draw one of these isosceles triangles and label it with ...

algebra
Let n be the number of nickels. Let q be the number of quarters. n + q = 34 0.05n + 0.25q = 3.90 Solve the above system of equations for n and q.

Chemistry
9.54 for this one?

Chemistry
The resulting pH of a solution when 100 mL of 0.877 M NH3 is mixed with 100 mL of 0.481 M HBr is ___. For NH3, Kb = 1.8 × 10?5.

Chemistry
Does 4.7 sound correct?

Chemistry
A solution that is prepared by mixing 20.0 mL of 0.32 M HC2H3O2 with 20.0 mL of 0.36 M NaC2H3O2 would have a pH of ___. For HC2H3O2, Ka = 1.8 x 10-5.

Social Studies
I NEED HELP QUICK!!!! what effect did John Hay's open door policy letters have on the imperial powers of Britain France Germany Russia and Japan? 1. it provoked the imperial powers to declare war on the United States. 2. it caused the imperial powers to restrict trade in ...

Social Studies
what effect did John Hay's open door policy letters have on the inperial powers of Britain France Germany Russia and Japan?

language arts
Can someone help me with unit 3 lesson 19 different perspective test plz

Math
Im sorry for bombarding you guys with questions. I've only needed help with 3 of 40 so far.. Anyways, moving on! 3! = 3 * 2 * 1 4! = 4 * 3 * 2 * 1 5! = 5 * 4 * 3 * 2 * 1 30! = 2^x * N where N is odd. What is the value of x? I have no idea where to start, but reading the ...

Math
1/3 * 2/4 * 3/5 * 4/6 * 5/7 *... ... ... * 98/100 = ? Is there a specific way on how to calculate this?

La
1. B

Math
Yeah, my bad. Thanks a lot!

Math
Dedi has a rectangular pool in his backyard. The surface area of the pool in 30m^2 and the width is 5m. There are 4 lights, equally spaced along each of the longer sides of the pool, including a light at each corner. What is the shortest distance between two lights? I tried ...

english
A successful academic argument depends upon

Math
Is it #1

math
Verify: tan^2a=cot^2a-cot^2acsc^2a

Math
Verify: tan^2a=sec^2a tan^2a-1

Statistics
50 apples from an orchard are randomly selected. A mean apple diameter of 2.22 inches is calculated with a margin of error for a 95% confidence interval of ±0.13. What is the interval estimate of the population mean? 1.99 < ? < 2.23 2.09 < ? < 2.35 2.09 <...

Calculus
A particle's position along the x-axis is given by x(t) = t^4/24 - t^3/2 + 2t^2 - 1. What is the maximum acceleration on the interval 0 <= t <= 4? I found the acceleration to be (t^2 - 6t + 8)/2 and the derivative of the acceleration to be t - 3. I thought the ...

Calculus
A differentiable function called f(x) achieves its maximum when x=0. Which of the following must then be true? 1. The function p(x) = xf(x) has a critical point when x = 0. 2. The function m(x) = (f(x))^2 has its maximum at x = 0. 3. The function j(x) = f(x^2) has its maximum ...

Algebra 2
I'm so sorry!! I actaully meant f(x)=2sin(x/2)-1

Algebra 2
What effect does changing the function f(x)=2sin(x2)?1 to the function g(x)=2sin(x)?5 have on the graph of f(x)? The graph is stretched vertically by a factor of 2 and shifted right 4 units . The graph is compressed vertically by a factor of 2 and shifted left 4 units . The ...

EXAM TOMORROW
Building new,stable houses and shops

history
Barry allan is correct and yes he spelled his name wrong if he did mean the flash but that doesent matter is is correct

Math
Divide (-6m^9 - 6m^8-16m^6) / 2m^3 I get -3m^12 -3m^11 - 8M^9 NOT A CHOICE ON PAPER could it be -3m^9 -3m^8 -8m^6

physics
the half life of radium is 1600 years of 100 grams of radium existing now 25 grams will remain after how many years

Math
950,000*.10 = 95,000 950,000-95,000 = 855,000 (1yr) 855,000*.10 = 85,500 855,000-85,500 = 769,500 (2yr) Repeat the process until reach 5 yrs.

social
How did social controls shape Japanese identity and citizenship?

Geometry
Find the area. The figure is not drawn to scale. 6.9 4cm

Macroeconomics - Please help
How does the aggregate expenditure multiplier change given a decrease in marginal propensity to import and marginal propensity to consume?

Economics
Explain how each will impact the size of autonomous expenditure multiplier, other variables constant. (a) Decrease in marginal propensity to consume (b) Decrease in marginal propensity to import

Chemistry
A copper electrode weighs 35.42 g before the electrolysis of a CuSO4(aq) solution and weighs 36.69 g after the electrolysis has run for 20.0 min. What was the amperage (Amps) of the current used? this is the equation that i used is it correct (1.27g Cu x 1 mol Cu x 2 mol e- x ...

geometetry
Given: KLMN is a trapezoid, m?K = 90°, LM = 9, KN = 18, MN = 15 Find: Area of KLMN LM and KN are parallel

statistics
Suppose that diastolic blood pressure readings of adult males have a bell-shaped distribution with a mean of 84 84 mmHg and a standard deviation of 9 9 mmHg. Using the empirical rule, what percentage of adult males have diastolic blood pressure readings that are greater than ...

Geometry
Given: KLMN is a trapezoid, KL = MN, m?LKM=m?MKN, LM:KN = 8:9 , Perimeter KLMN = 132 LM and KN are parallel Find: The length of the legs. I reposted this question because the last time was not vary clear, and I got 49 but it is wrong

Music
What is the note called that has 4 beats?

geometry
P stands for the perimeter, and LM and KN are parallel. angle one is LKM and angle 2 is MKN

geometry
Given: KLMN is a trapezoid, KL = MN, m?1=m?2, LM:KN = 8:9 , PKLMN = 132 Find: The length of the legs. I got 49, but it was wrong

bio
salt does it have more free enrgy when dissolved in water

Work
i am primarily cream in color but speckled in grey. round is not my shape, nor is square. i am a loner in my environment. if i could speak, the stories i would tell.

English
What two word are the most opposite in meaning hanker grovel hurtle and patronize

Chemistry
A system has an initial energy of 117 joules. The energy equation includes --40.1 J of heat and -20.3 J of work. What is the final energy? Was heat added to the system or to the environment? Was work done by the system or to the system? Be sure to show all of your work and ...

Somerset Academy
80% of an airline's flights depart on-time and 20% do not. Of those that depart on-time, 95% arrive on-time. OF those that depart late, 10% arrive on-time. What is the chance of someone taking a flight that will arrive on-time?

math
Mrs. Davis planted red flowers in 0.6 of her garden. She also planted yellow flowers in 0.4 of her garden. In 0.5 of the part with red flowers she also planted white flowers. What part of Mrs. Davis' garden has both red and white flowers?

algbra
Solve the inequality ?4y + 6 < ?14. A. y > 2 B. y ? 5 C. y > 5 D. y < 5

MATH
Convert r^2=3/(tanx) into cartesian form. I got this so far: r^2=3/(tanx) x^2+y^2=3x/y What do I DO NEXT????

Chemistry
Give the formal charge on the sulfur atom in a Lewis structure for the sulfate ion in which every atom satisfies the octet rule. Based off my lewis structure, I think the formal charge of the the sulfur atom would be +2. Is that correct?

English
the story of disabled athletes who became well known

Maths
Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2

Math
Thank You!! This really helped me!!

Math
Algebra 1 Simplify the radical _____ 5_/700 I'm confused on what to do with the 5...

Maths
show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8y - 4y + 14 = 0 do not intersect

math
no idea , go find ur self

Algebra
Explain how to use the measures of a right triangle to calculate the exact value of sin 30 degrees? How can this information be used to determine the exact value of sin 60 degrees?

maths
show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8y - 4y +14x = 0 do not intersect

Social Studies
Thank you :)

Social Studies
Which country today has the largest muslim population. A. Iraq B. Indonesia C. Iran D. the United states

math
A cable channel survey showed that about 50% of subscribers preferred watching a comedy to an action movie on Saturday nights. If you want to estimate the probability that exactly two of three randomly picked subscribers prefer watching an action movie on a Saturday night, how...

Sociology
1 is B

Psychology
I am curious as to how someone who distributes a personality test would be able to decipher who is and who is not telling the truth on the test? If the test is straightforward such as "are you a liar?" obviously that is not desirable and people could just answer '...

social studies
yes

social studies
Is Plato now of the teachers of Hippocrates (the Father of medicine)

Math
18.125

Math
A baby weight 7.25 at birth at the end of a eight months the baby weight 2 and a half times its birth weight how many pounds did the baby weight at the end of eight months

ELA
gasp chyanne your language! they just haven't seen your a good man Charlie brown why do you have to use such bad language!

math
what's the solution for y=2x-1 and y=x+3

MAth
3a +4/4a+4 x a^2 - 6a -7 Asking for the product so confused

accounting
The following information was available as of the close of business June 1, 2004 on government of Canada bonds. Coupon...Maturity.....Price.....Yield 5.00%......June 1, 2005......102.35......2.60 10.50%......June 1, 2006......113.91......3.26 8.50%......June 1, 2007.....107.41...

Physics
What does it mean when the position vs. time graph is below the x-axis?

science
PLEASE HELP!

math
answer How do you write a song hat will knock over a cow?

physics pls help i found answer but its wrong
kgm^2/s^2 is also J for units

physics pls help i found answer but its wrong
Some dragonflies splash down onto the surface of a lake to clean themselves. After this dunking, the dragonflies gain altitude, and then spin rapidly at about 1100 rpm to spray the water off their bodies. When the dragonflies do this "spin-dry," they tuck themselves ...

math
A swimmer swam 0.8 mi at 0.0323 mi per min in waters created by melted sea ice. What was his? time?

physics
Find the coordinate of the center of mass of the bricks shown in the figure.(Figure 1) Express your answer in terms of L. <------------ L---------> <---L4---> ---L2------> -------------------------------------------> 0 X

Algebra 1
Thank you

Algebra 1
I am changing my answers to the first question as A and the second as C

Algebra 1
How many solutions does this system have? y=x+5 y=?5x?1 A. One B. None C. Infinite D. Two** Which best describes a system of equations that has infinitely many solutions? A. Consistent, independent B. Inconsistent, dependent C. Consistent, dependent D. Inconsistent** I'm ...

physic - stress and strain
Sample 1, Original Length 250 mm and 10 mm Diameter, Length after testing 250.23 mm the force used for the test was 15KN Calculate the Stress and Strain for each of the Samples and from this and, assuming the material has remained within the elastic limit, determine their ...

History
So.... D?

History
Why did Seward buy Alaska? A)To access Alaskan gold. **B)To kick Russia out of North America.** C)To increase trade in Asia and the Pacific. D)To develop desirable land.

maths
Sample 1, Original Length 250 mm and 10 mm Diameter, Length after testing 250.23 mm the force used for the test was 15KN Calculate the Stress and Strain for each of the Samples and from this and, assuming the material has remained within the elastic limit, determine their ...

Physics
a body moving with uniform acceleration travels 84m in First6s and 180m in next 5s . Find the initial velocity and acceleration of body

Science
How will resistance change when the voltage increases in an electric circuit if the current remains constant

Science
6.022*10^22 in one bank

Science
6.022*10^22

maths
Jake is mapping out important family events. He uses negative numbers to represent time before he was born and positive numbers to represent time after he was born. For example, Jake's mum was born in year −20, and Jake's sister was born in year 5. ...

Chemistry
The measured pH of a 0.100M solution of NH3(aq) at 25C is 11.12. Calculate Kb for Nh3(aq)at 25C.

Juvenile Justice
I was finally able to find the answer to be kent v u.s. in my textbook (in a different chapter that the question was from!) Thank you for the help, it was useful in confirming my answer!

Juvenile Justice
What Juvenile case eliminated the hands-off doctrine for juvenile courts?

Algebra
2x^2-5x-12/10x+15

algebra
A fish can swim 45 miles downriver in the same amount of time that it can swim 27 miles upriver. Solve for the speed of the current if the speed of the fish is 12 mph in still water. Show all of your work and explain your solution.

algebra
The volume V of a gas varies inversely as the pressure P on it. If the volume is 250 cm3 under a pressure of 35 kg/cm3, solve for the pressure applied to have a volume of 180 cm3. Be sure to define your variables, find your constant variable, construct your variation equation...

Chemistry
Yes, sorry typo.

Chemistry
Show the steps needed to determine the energy in a red photon of 7.0 x 10^2 nm. E= h * (c/?) 6.62e-34 * (3e8/2e-7) 2.837e-19 J? Is this correct?

math
solve the following by a quadratic equation and then solving it. a rocket is projected vertically upwards from ground level, its height "h" meters after "t" seconds is given by the formula h=35t-5t^2 how long does it take to reach 50 meters? you should have...

maths
solve the following by a quadratic equation and then solving it. a rocket is projected vertically upwards from ground level, its height "h" meters after "t" seconds is given by the formula h=35t-5t^2 how long does it take to reach 50 meters? you should have...

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