# Posts by anonymous

Total # Posts: 109,269

**Dynamics**

The rod of the fixed hydraulic cylinder is moving to the left with a speed of 100 mm/s and this speed is momentarily increasing at a rate of 400 mm/s each second at the instant when sA = 425 mm. Determine the tension in the cord at that instant. The mass of slider B is 0.5 kg...

**Calculus**

How do you know the r is 2-y and not just y?

**Calculus**

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations y = 0.5x^2, y = 2, and x = 0 about the line y = 2. A. 8pi/15 B. 32pi/15 C. 64pi/15 D. 4pi/15 E. 16pi/15

**math**

x^2 = 4 x = +2 or -2

**Calculus**

The region enclosed by the graph of y = x^2 , the line x = 2, and the x-axis is revolved abut the y-axis. The volume of the solid generated is: A. 8pi B. 32pi/5 C. 16pi/3 D. 4pi 5. 8pi/3 I solved for x as ?y and set up this integral: 2pi * integral from 0 to 2 of y?y. But it ...

**PHYSICS**

Electrical force: Coulomb's law: F = kqQ / r^2 q = Q = 1.6*10^-19 Coulombs r = 5.9*10^-11 meters k = 8.99 x 10^9 N m^2 / C^2 Gravitational force: F = GmM /r^2 G = 6.67*10^-11 m = 9.1*10^-31 kg M = 1.67*10^-27 kg same r so it cancels when you do ratio Electricity wins :)

**Java**

Sorry, I meant I think it may be the first answer.

**Java**

"Assuming the necessary classes have been imported, which of the following statements will compile without error?" Object obj = new Calendar(); Calendar c = new Calendar(); GregorianCalender d = new Object(); Object e = new GregorianCalender(); I think it may be the ...

**Science, Physics**

zsasdsd

**Math**

A manufacturing company wants to minimize the cost of materials for a pop can which needs to hold 640 mL. Find the radius and height (in centimeters) of the cylindrical can with minimum surface area that holds this volume. Give your answer as a decimal number accurate to at ...

**math**

A microwaveable cup-of-soup package needs to be constructed in the shape of cylinder to hold 550 cubic centimeters of soup. The sides and bottom of the container will be made of syrofoam costing 0.03 cents per square centimeter. The top will be made of glued paper, costing 0....

**Math - Quadratic Equations**

Last one At present, Mark's age is x^2 years and Peter's age is x years. When mark is 10x years, Peter will be 3x years. What are their present ages? Question is kind of confusing to me, so again i just need help forming the equation. Thanks.

**Math - Quadratic Equations**

The base of a triangle is 6 cm longer than its height. If the area of the triangle is 140cm^2, what is the length of the base? Im just confused on how the equation should be formed. Thanks.

**math**

The height of a person above the ground on a Ferris wheel is given by the function h(t)=9 sin {pi/20 (t- pi/2))+ 12 where h(t) is the height in meters of person t seconds after getting on a) how long does it take the Ferris wheel to make one complete revolution b)what is the ...

**Math - Quadratic Equations**

Two consecutive even numbers have a product of 288. What are the numbers? The answer I got through trial and error was 18 and 16. Is there a way for me to form the question into an equation and work that out to find the answer, instead of just guessing numbers? Thanks.

**math**

Sasa, June and Don are waitresses. When they compare their tips at the end of their shift they notice that Juice earned 30c for every 40c that Sandy earned while Juice earned 20c for every 25c that Dido earned. How much would Dido earn if Sandy earns $36?

**Science unit 9**

What would you do to measure the volume of a baseball

**Geometry**

Given: ABCD is a parallelogram m?A = 60º ; BK ?AD AK = KD; Perimeter of ABCD = 24 Find: BD. So I have this question it has been giving head aches and I am vary tired of doing, can you post the answer and the solution my class is starting in 2 hours, and it would be a vary...

**Math**

I'm sorry I messed up I meant will it become greater or smaller

**Math**

If the decimal in the number 4157.98 is moved one place to the right the number will become-

**Math**

If the decimal in the number 4157.98 is moved one place to the right the number will become-

**History**

What were some advantages of using rifles as a weapon in WW1? I only got some down, but I need at least 3-5 more. Can fire many rounds in a minute, easy to bring and are lighter weight than most weapons, good portability, good range of up to 1400 meters

**gerund**

Is drinking the direct object So fixing is PN?

**gerund**

fixing is a d.o drinking is pn?

**Social science **

Most major cities in core countries are postindustrial. Can you think of an example of a growing city that is still in its industrial phase? How is it different from most Canadian cities?

**History/English**

Oh okay. The reason I made that my slogan is because my project is about advertising a weapon that is good for WW1, so I chose rifles. Would that be okay?

**History/English**

I am trying to make a slogan for a project I have. Is this correct grammar? Rifles are a man's best friend

**gerund help**

thank you so muchh! i didn't even think of that word! thank you again

**english**

Part A In January what does the speaker mean by the image in the following lines? (1point) The sun a spark Hung thin between The dark and dark. A. The sun barely shows behind the dark clouds. B. The sun sends off thin sparks in the night. C. The sun appears for only a short ...

**Ethics**

it is describing socialism because its not free not everything comes free?

**Ethics**

dean harris

**Ethics**

It is ethics of health care

**Ethics**

The traditional view of medical ethics is that a physician has a duty to his or her individual patient, rather than to society as a whole. Under that view, a physician should not deny a potentially beneficial treatment for one patient, in order to save costs or conserve ...

**Calculus**

minimum area

**social studies**

Anybody have the answers for the full unit test? please help need to check answers FAST

**Science**

The sun's apparent motion across the sky from East to West daily is due to the A) rotation of the sun. B) rotation of the earth. C) orbit of the earth around the sun. D) orbit of the sun around the earth. I think the answer would be c.

**Language arts**

he is right though ^

**math**

a diamond weighing 2.5 carats was cut into two pieces. The two pieces were put on a balance scale, one on each side. An additional weight of 0.9 carats on one side was required to maintain balance. Find the weight, in carats, of the larger piece

**science **

A man walk 3km East and 4km North what is his resultant displacement? Suppose he walks 3km and 4km 60 degree North of East. What is the displacement?

**Decroly**

If n represents the amount of songs stored on an MP3 player , analyze the meaning of the expressions n + 7, n - 2 , 4 n and n \2

**math**

It took Joe 3 hours swimming at a speed of 12 miles per hour to swim along the Charles River. If Jennifer is swimming the same path along the Charles River at a speed of 9 miles per hour, how long will it take her to complete her swim?

**math**

Owen and Ethan have $175 together. How much money does each of them have if Ethan has $33 more than Owen?

**American gov**

Thank you so much!

**American gov**

17. The requirements for libel detailed in New York Times v. Sullivan protect which principle? (1 point) equal protection of the law right to criticize the government separation of church and state judicial review as i'm researching i see protection a lot. so My answer is a?

**American gov**

Thank you

**American gov**

16. What ruling did the Supreme Court make regarding flag burning in Texas v. Johnson? (1 point) It is legal to burn flags other than the U.S. flag, but burning an American flag is not free speech because it affects public morale. Burning any sort of flag is a form of ...

**American gov**

i know i'm posting a lot but i just wanna be sure. my answer is b 14. Read the following excerpt from the Supreme Court’s ruling in Stanley v. Georgia. The makers of our Constitution undertook to secure conditions favorable to the pursuit of happiness . . . . They ...

**American gov 1 question answer check**

so federalism?

**American gov 1 question answer check**

i was researching the choices but i could't relate them to the question. and i don't wanna just guess.

**American gov 1 question answer check**

12. The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people. –Tenth Amendment This amendment is an example of which of the following? (1 point) prior restraint***** ...

**American gov**

But freedom to differ is not limited to things that do not matter much. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order. . . . If there is any fixed star in our constitutional ...

**gerunds**

then what is the gerund phrase for #3 you said no to both ive said now idk

**gerunds**

1. Camping and fishing on the Isleta Reservation subject 3. During some of the ceremonial dances object of prep 5. direct object

**American gov**

so it would be c? establishment clause

**American gov**

Check my answers pleaseee i have a star * by my answer 4. Rights are not absolute. Which of the following examples would support this statement? Select all that apply. (3 points) ( this one has 3 answers) A citizen criticizes public policy. A man yells “Bomb!” at an ...

**maths probability plz help**

(i) the probability that he goes early for his appointment is 0.6x0.3 + 0.4x0.65 (ii) the probability that he went by car is (0.6x0.7)/(0.6x0.7+0.4x0.35)

**physics**

I have the exact same question.. really need help

**Math**

*sorry* my name is nathaly but I like to put my name shorter for nat...

**social studies**

What use was made of this order, which set up military areas where the Secretary of War controlled who would enter the place, who would leave or stay, and who was excluded?

**chemistry**

Iron can be determined gravimetrically by precipitating as Fe(OH)3 and igniting to Fe2O3. The sample to be analyzed is weighed and transferred to a 400-mL beaker where it is dissolved in 50 mL of H2O and 10 mL of 6 M HCl. Any Fe2+ that is present is oxidized to Fe3+ with 1&...

**Maths**

The temperature at 12 was 10 degree above zero . If it decreases at the rate of 2 degrees per hour, what was the temperature at 2 afternoon?

**Maths**

The sum of money that will produce â‚¹1770 as simple interest in 7.5 year as 8% at per annum is how much

**chemistry**

metals with 8-hydroxyquinoline, C9H7NO. After weighing the mixed precipitate, the precipitate is dissolved and the amount of 8-hydroxyquinoline determined by another method. In a typical analysis, a 127.3 mg sample of an alloy containing iron, manganese, and other metals was ...

**Math - Mean Value Theorem**

Suppose f(x)=?x^2+?x+? is a general quadratic polynomial with ??0 and let [a,b] be any interval. According to the Mean Value Theorem there is at least one number c such that f(b)?f(a)=f?(c)(b?a). In this particular case the number c is unique and it's independent of the ...

**hi**

Fourteen soccer players want to share nine protein bars after the game. What fraction of a protein bar will each player get?

**Math - calculus**

Suppose f(x)=x^p where p>1 and [a,b]=[0,1]. According to the Mean Value Theorem there is at least one number c such that f(b)?f(a)=f?(c)(b?a). In this particular case the number c is unique but it depends on p. c=____ Your answer will be in terms of p.

**chemistry **

What type of chemical reaction is this equation? CuO (s) + [2H+ + SO4 2-](aq) [Cu2+ + SO4 2-] (aq) + H2O (l)

**History**

What weapon/technology would be the most beneficial during WW1? Trench warfare, machine guns, field guns, rifles, poison gas, flame thrower, aircraft, tanks, U-boats, or battleships? I'm not sure but I eliminated trench warfare, flame throwers, aircraft, tanks, and u-boats

**Physics**

Using Coulomb's law to solve: Charge A is +2.0x10^-6C and charge B is +3.0x10^-6C. The two changes are 3 m apart. What is the force between them?Is the force attractive or repulsive? Okay so here's what I have so far (2.0x10^-6)(3.0x10^-6)/(3)^2 It is confusing me with...

**bio**

I think A,B, and D but I'm not 100% sure

**Designing Specialty Areas**

Oh now i get it. So A is the answer. sorry

**Designing Specialty Areas**

In my opionion, it would be the answer B because its much more useful and fun for kids (and other people) , I guess.A wooden playground structure with swings and slides is a perfect idea.

**math**

Oh thanks, Ms. Sue!

**math**

I get it now and thanks. But, one more question, how do you get 13.5? I see that my answer is wrong but I just wanted to make sure how to get 13.5. Thanks once again!

**math**

what is -3.5 + 17? The online calculator says 13.5 and I don't get how that is the answer. I got 14.5 and I am confused. Please help me and explain this to me

**math - algebra**

write (1/81)^(1/4) in radical form

**Algebra **

An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

**Math**

I really suck at math 1. B 2. A 3. C 4. A

**math**

240 people attended a concert.tickets for adults were R60 and for children R40. The concert raied R12800. How many adults and how many children attended???

**Math- Graphing (check answer)**

C?

**physics help**

At a playground, a 20-kg child sits on a spinning merry-go-round, as shown from above in (Figure 1) . The merry-go-round completes one revolution every 6.2 s, and the child sits at a radius of r=1.8m. a) What is the force of static friction acting on the child? b) What is the ...

**Math**

Anna is buying 2/5 of a pound of beans for dinner . Mercy is buying 7/4the amount of beans that Anna is buying how many pounds of beans is mercy buying

**psychology**

Thank you, PsyDAG

**Precalculus**

List the transformations that take g(x)=1/x to f(x)=3x-4/x+2. Is it 1. reflection across y axis? 2. translate left 2 units? 3. translate up 3 units? 4. vertically stretch by a factor of 10?

**College**

Oh so it just depends on the college? It isnt a requirement in general to take another language class?

**College**

I have a genuine question.. I have taken 3 years of Spanish in high school, but when I go into college, do I need to take another language class for my prerequisite, or do I not have to take any more language classes?

**Algebra**

How do I simplify (x+1)(x(-4-5i))(x-(4+5i))?

**Precalculus**

What is the quadratic factor of x^4+4x^3-10x^2+8x-24?

**Precalculus**

Simplify (x-4)(x-4)(x+7i)(x-7i)

**History**

according to adolf hitler how has germany been treated unfairly by the treaty of versailles

**math**

Recipe calls for 2 cups flour to 3/4 cup milk. How much milk would I need for 11/4 cups flour?

**physics help**

Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as indicated in the figure. If the radius of curvature of the bump is 52 m, find the apparent weight of a 66-kg person in your car as you pass over the ...

**calculus**

A farmer wants to construct a fence around a rectangular field. Sides with neighbours need reinforced fencing that costs $8 per meter. The other sides use regular fencing that costs $4 per meter. Assuming the farmer has neighbours on the east and west sides, answer the ...

**Payroll accounting**

Julie Whiteweiler made $930 this week. Only social security (fully taxable) and federal income taxes attach to her pay. Whiteweiler contributes $100 each week to her company's 401(k) plan and has $25 put into her health savings account (nonqualified) each week. Her ...

**Math (check answers)**

1. A 2. A 3. A 4. D 5. C 6. C 7. B 8. C 9. ? 10. ?

**Math**

31/3

**Math**

I don't get this: Arya makes cupcakes at a bakery. She needs 2 cups of sugar for every 3 cups of flour. She needs 5 cups of flour to make a day's worth of cupcakes. How many cups of sugar will she need? (Round your answer to the nearest tenth.) Can you please help?

**History**

which of the following are outcomes of expanding public education in the early 20th century?

**Social Studies**

i yjihk becuz of caste bad

**Precalculus**

Find a polynomial with real coefficients that has the given zeros. -1 and 4-5i