Monday

April 21, 2014

April 21, 2014

Total # Posts: 454

**physic angular momentum and torque**

What is the angular momentum of a figure skater spinning at 2.7rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m , a radius of 14cm , and a mass of 50kg How much torque is required to slow her to a stop in 4.4s , assuming she doe...

**Physics**

The Lamborghini Murcielago can accelerate from 0 to 27.8 m/s (100 km/hr or 62.2 mi/hr) in a time of 3.40 seconds. How fast will the car be traveling (m/s) after 5.1 seconds.

**Geometry.**

can you imply something if you are given that two altitudes intersect in a triangle?

**Geometry.**

prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??

**Social Studies**

i don a lot of research but yes they won

**science**

Why are liners laid down at the bottom of a landfill before waste in the landfill?

**science**

That is what it said in the book. What is the right answer?

**science**

No wait it is A

**science**

C?

**science**

which of the following would be most likely to lead to increase biodiversity? A.clear-cutting B.oil drilling C.national park planning D.farming

**Early Childhood Education**

A disadvantage of large group times is: A. language is enjoyed as a group. B. children develop an understanding of being a group member. C. the difficulty of having intimate conversations. D. they are often seen as sharing times. In a study about kindergarten readiness, which ...

**Algebra**

Thank guys :)

**Algebra**

What are the zeroes of y = x2 – 2x – 15? –3, –5 3, 5 –3, 5 3, –5

**Math**

1. What is the vertex of each of these parabolas? a. y = (x –7)2 +4 b. y = 3(x + 7)2 – 4

**Math HELP**

If log a = 3, what is log a4?

**math**

Assume you have $1,000 and find a place to invest it that will give you 5% compounded annually. a. How long will it take your investment to be worth $1,500? b. Is it worth your while to run around and find another place which will give you 5% interest compounded daily? Explain...

**MatH HELP**

Kensin longs to own a Maserati. He can afford $40,000 for a car. If this year’s model sells for $135,000 and will depreciate at 10% a year, in how many years will he be able to afford this model Maserati?

**Alegbra Help**

Find the domain of: 6/(9-4x) 7/(x^2-8x) (x^2+9x)/(x^3-13x^2+40x)

**MATH HELP**

Derrick is investing $1,000 at 5% interest and Anna is investing $750 at 7% interest. Both interest rates are compounded annually. When will they have the same amount saved? (Hint: 1.05t/1.07t =(1.05/1.07)t )

**Math HELP**

When a Superball bounces it is claimed that the height of any bounce is 90% of the height of the last bounce. If a Superball is dropped out of a second story window at the height of 200 feet. On which bounce would it bounce just one foot?

**MATH HELP**

Log 1000 =a Log a =1 Log a = -1 What is the vaule of A

**math**

find the product to (2x+4y)(8x+3y)

**Math PLEASE HELP ME!!**

How would you solve this inequality -3(n+8)<-17-3n

**Math**

How would you solve this inequality -3(n+8)<-17-3n

**Math**

A room contains 8 crates. Each crate contains 8 boxes. Each box contains 8 bags. Each bag contains 8 balloons. a) How many balloons are in the room? b) Express the numbers of balloons as a power. Identify the base and the exponent. please help i understand a) that u have to mu...

**algebra 1A**

What's 35ab/105bc simplified

**physics**

A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...

**College Physics**

Sorry, I meant 250 not 225. Either way its still not the correct answer..

**College Physics**

A 7 kg mass hangs on a 10 meter long weightless cord. To the nearest cm, what should the new length of the pendulum be in order that the new frequency be 1.8 times its current value? The correct answer is 309 but I got 250. Heres what I did.. (1/2pi)(sqrt g/L2) = (2/2pi)(sqrt ...

**College Physics**

7 Moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 1000 cm3 to a volume of 316 cm3. To the nearest tenth of a kJ what is the work done by the piston? (It is a monatomic ideal gas.) I have W = (3/2)nRT1(V1^(gamma-1) V2^(1-gamma) t...

**physics**

A 950-kg race car can drive around an unbanked turn at a maximum speed of 46 m/s without slipping. The turn has a radius of 120 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of ...

**Trigonometric Functions! (Ferris Wheel)**

Thank you very much Steve!

**Trigonometric Functions! (Ferris Wheel)**

The Ferris wheel at a carnival has a diameter of 18m and descends to 2m above the ground at its lowest point. Assume that a rider enters a car at this point and rides the wheel for two revolutions My main problem is how to get the phase shift. (The answer says its 270 degrees)

**Periodic Function (Trigonometric Fuctions)**

A lighthouse beacon rotates through 360 degrees every 12 seconds, it is located 100 m off the shore of an island with a coastline of steep cliffs running north and south. As the light beam sweeps clockwise, starting from the north (direction of 0 degrees), it strikes some part...

**math**

Will someone please help me with this problem. Simplify the expression, if possible. log 1.

**math**

Any of the ten digits 0 through 9 may be used in a 6-digit code, but no digit may be used more than once. If the first two digits are 1 and 7, what is the largest possible average of all 6 digits? a)4 b)6 c)6.5 d) 7

**English**

Thank you This what I have but I'm not sure if it's correct. 1. A ; 2. C ;

**English**

I need help with these questions. Which of the following options best demonstrates sentence fluency? A. The city looked beautiful in that it was lit by the sun while I was walking down the street. B. Walking down the street in the sunshine, the city looked beautiful. C. The ci...

**math**

Solve negative five-ninths equals negative two v minus one-third for v. choices four-ninths negative one-eighteenth one-ninth five-sixths

**Chemeistry**

when 4.50 g of fe2o3 is reduced with excess h2 in a furnace, 2.6 g of iron metal is recovered. What is the percent yield when molar mass of Fe2O3 is 159.7

**Pre-Algebra**

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...

**Pre-Algebra**

Thank You So Much Linzy :)

**Pre-Algebra**

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...

**social studies**

OK,I will thank you so much Ms. Sue !!!!! :D !!!! HAVE A NICE DAY :D

**social studies**

Compare and contrast how the United States and Canada achieved independence. Why do you think the United States has 10 times more people than Canada? Explain one way that ethnic groups in the U.S. and Canada are similar and one way that they are different.

**Math**

Find the area for a triangle: base 14 cm, height 5.5 cm. 19.5 cm² 77 cm² 38.5 cm² 770 cm²

**math**

I only need help with B. I have already figured out A and C

**math**

q = 350 − 5p (a) Enter the equation for revenue R as a function of price p. R = (b) What is the (instantaneous) rate of change of revenue with respect to price when the price is $6? (c) At what price is the derivative of revenue with respect to price exactly zero?

**languagge/french**

thank you

**languagge/french**

i saw it on google but for the other sports i don't seem to find the right vocbulary

**languagge/french**

what are some winter sports written in french like for example skiing is "ski du faire". please help

**ENG1511**

This is great news indeed, I can't believe I made it!

**Calculus**

Given a function f(x)=sqrt(100-x^2) Evaluate the integral xsqrt(100-x^2dx) for the interval (0,10)

**math**

7 3/5 ft = how many yards?? How do I do this??

**Math 6 help ??????**

Thanks! I understand it clearly !

**Math help Thanks!**

Yeah! Thanks!

**Math help**

You buy sneakers at 2/3 of their original prioce of $60 = $40 A sweater at 7/10 of its oreginal price of $35 = 24.5 And a jacket at 5/6 of its oreginal price of $45 = $37.5 So you spent $ 102 Saved (origianl cost - buying cost) ( 60+35+45) - (102) = $38 The fraction is 38/140 ...

**Math help**

You buy clothing at a sale. You buy sneakers at 2/3 of their original price of $60, a sweater at 7/10 of its original price of $35, and a jacket at 5/6 of its original price of $45. Answer each question and show all your work. a. How much money did you spend? b. How much money...

**Math**

Jennifer started with $50 in her savings account. Each week she withdrew $10. The amount of money in her savings account after x weeks is represented by the function f(x) = 50 - 10x. Find the intercepts.

**Math Please it is Urgent!!!**

ME 2

**Math PLEASE HELP!!!**

Part 1: A rectangular box is 2 inches high, 3.5 inches wide amd 4 inches long. A cyliner box is 3.5 inches high and has a diameter of 3.2 inches. Use 3.14 for pi. Round to the nearest tenth. Part 2: whWhich box has a larger volume. How much bigger is the larger box?

**Math I REALLY NEED HELP!!!!!!!!!**

A refrigerator has inside measuremnets of 50 cm by 118 cm by 44 cm. What is the capacity of the refrigerator?

**Math PLEASE HELP!!!**

A contractor pours a sidewalk that is 4 inches deep, 1 yard wide, and 20 yards long. How many cubic yards of concrete will be need? (Hint: 36 inches = 1 yard)

**Math PLEASE HELP!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4) No one has answered

**Math I REALLY NEED HELP!!!!!!!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4)

**Math I REALLY NEED HELP!!!!!!!!!**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20

**Math**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20

**Math**

John has 11 more quarters than dimes. He has a total of $7.65. How many quarters and dimes does he have?

**Math (trigonometry)**

MONDAY December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th...

**Math (trigonometry)**

From the top* of a cliff, not from the drop of a cliff.

**Math (trigonometry)**

From a boat on the water, the angle of elevation of the drop of a cliff is 31°. From a point 300 m closer, the angle of elevation is 33°. Find the height of the cliff. the answer should be 2411 m. I had tan31° = h/x+(x-300) tan33° = h/x-300 -> (x-300)tan33&d...

**Math (trigonometry)**

How do you get the second triangle when you have an ambiguous case of sine law? For example, if you are given the following information for a triangle: a = 7.2 mm, b = 9.3 mm, <A = 35° I can solve for one triangle: Find <B, <C, side c. <B: sinB/9.3 = sin35°...

**Math (trigonometry)**

But in the triangle I was thinking of/the one I drew, the mountain is inside triangle ABC...? I don't really understand why I would have to take the supplementary angle of 22.3; I'm not disagreeing with you, I can see that you're right, I just don't understand ...

**Math (trigonometry)**

Sorry, a) should say, "calculate the distance to the top of the mountain from point A," not point B.

**Math (trigonometry)**

A surveyor wishes to find the height of a mountain. He selects points A and B on level ground along the same line of sight to the mountain. He measures the distance AB to be 1503 m and the angles of elevation of the top of the mountain from the points to be 16.9° from A an...

**Math 8R**

You're welcome.

**Math 8R**

The square root of 1/16 is 0.25 which is a real number. When the number under the square root is negative , that's when you have a number that is not real.

**Math 8R**

Sorry, completely misread the order of the letters. No, b is correct. Because 13/0 is undefined.

**Math 8R**

Yes.

**Math (trigonometry)**

Oh! Wait, sorry, again. Never mind. That was really stupid of me. I don't know how I didn't see it, but I realise what was wrong now, thank you

**Math (trigonometry)**

Oh, never mind about not being able to visualise your proof at the end, I completely misread that, wow. But my diagram is still incorrect somehow because 27.4 is the adjacent side..

**Math (trigonometry)**

I think I may need to rethink this question because in the diagram I drew, 27.4 m is adjacent to the 45° angle. And the proof you showed me at the end cannot be visualised in my diagram.. Would it be possible for you to explain in words (I know it's really hard..) what...

**Math (trigonometry)**

A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal places) from t...

**Math**

no problem sorry again have a nice day =)

**Math**

ohh Sorry :( my bad

**Math**

Maybe.

**Math**

I think Side 2? I think. Your Welcome :)

**math**

7.9% Is the Answer :-)

**Spanish III**

1. comenzar ---> 1. start 2. practicar ---> 2. practice 3. jugar ---> 3. play 4. almorzar ---> 4. lunch 5. tocar ---> 5. touch 6. buscar ---> 6. search 7. llegar ---> 7. get 8. pagar ---> 8. pay 9. cruzar ---> 9. cross 10. empezar ---> 10. Start

**Spanish III**

1. comenzar ---> 1. start 2. practicar ---> 2. practice 3. jugar ---> 3. play 4. almorzar ---> 4. lunch 5. tocar ---> 5. touch 6. buscar ---> 6. search 7. llegar ---> 7. get 8. pagar ---> 8. pay 9. cruzar ---> 9. cross 10. empezar ---> 10. Start

**Trigonometry **

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

**Math (trigonometry)**

Didn't you just factor that? (perfect square trinomial) I'm looking for a way to solve it without factoring..

**Math (trigonometry)**

How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1

**math**

No, because 3x_ can NEVER equal to 16 so 16 divided by 3 has no answer. There will be one left out.

**Physics**

A 35 kg box rest in the bed of a truck. The coefficient of static friction between the box and the truck bed is 0.30 and the coefficient of friction of kinetic friction is 0.10. A) Calculate the maximum acceleration the truck can have before the box slides backwards. B) The tr...

**Physics**

How do you know how long you need to draw the vectors? Like if the gravity vector line is longer than the normal force, or if the friction line is longer than the applied force or whatever..?

**Physics**

The maximum force a grocery sack can withstand and not rip is 250 N. Calculate the greatest acceleration 20 kg of groceries can be lifted from the floor to the table such that the sack does not break.

**physics**

A 59.0-kg skater is traveling due east at a speed of 1.80 m/s. A 61.0-kg skater is moving due south at a speed of 6.20 m/s. They collide and hold on to each other after the collision, managing to move off at an angle south of east, with a speed of vf. Find (a) the angle and (b...

**Science**

Can you tell me specifically why this is so??

**Science**

huh?

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