# Posts by kayla

Total # Posts: 1,609

**physics**

A circular disk of mass 0.2kg and radius 33cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7kg and the same radius, rotating freely at 4.4rad/s. a) Find the new angular velocity of the combination b) The change in the kinetic energy? c) ...

**physics**

No answer choices provided.

**physics**

A car moving with a constant speed of 83 km/h enters a circular, flat curve with a radius of curvature of 0.40 km. If the friction between the road and the car’s tires can support a centripetal acceleration of 1.25 m/s2, without slipping, does the car navigate the curve ...

**Precalculus 11**

So to find that I would need to go into decimals & leave exact form & then square my final answer to know that my answer was the root of 2?

**Precalculus 11**

Determine if the given value is a solution for each quadratic. Answer yes or no. 2x^2-3x(root 2)+2=0 I know the answer is yes but I don't know how to get to that answer. Thanks a ton! :) Kayla

**Math**

Darla purchased a new car during a special sales promotion by the manufacturer. She secured a loan from the manufacturer in the amount of $24,000 at a rate of 4.2%/year compounded monthly. Her bank is now charging 6.8%/year compounded monthly for new car loans. Assuming that ...

**physics**

A little boy jumps onto a small merry-go-round(radius 2.00m) in a park that rotates for 2.30s through an arc length of 2.55 before coming to rest. If he landed( and stayed at a distance of 1.75 , frp, tje cemtral axis of rotation of the merry-go-round, what was his average ...

**physics**

Help please? Having trouble with this. A race car makes two and half laps around a circular track in 3.0 min. What is the car's average angular speed?

**Physics **

In moving a 35kg desk from one side of a room to another, a man finds that a horizontal force of 275N is necessary to set the desk in motion, and a force of 195N is necessary to keep it in motion at a constant speed. What are the coefficients of both static friction and ...

**Physics **

In moving a 35kg desk from one side of a room to another, a man finds that a horizontal force of 275N is necessary to set the desk in motion, and a force of 195N is necessary to keep it in motion at a constant speed. What are the coefficients of both static friction and ...

**Math**

i dont understand

**geometry**

Name the property of equality or congruence that justifies going from the first statement to the second statement. StartFraction x Over 2 EndFraction equals 3x2=3 x equals 6x=6 symmetric property of congruencesymmetric property of congruence distributive propertydistributive ...

**Pre algebra**

What are the actual dimensions of the sofa in inches? 90 x 45 90 x 36 75 x 25 80 x 30 I think its the second choice

**physics**

Its been awhile I worked with radius so can you refresh my memory?

**physics**

A piece of uniform sheet metal measures 25 cm by 25 cm. If a circular piece with a radius of 5.0 cm is cut from the center of the sheet, where is the sheet’s center of mass now?

**Math **

How can u use regrouping to multiply

**Health**

9)F 10)F

**English **

3. How does Malik relate with his mother in “The Next Adventure”? How do their interactions change over the course of the story? Use specific details and evidence from the text to support your response. Your response should be at least two complete paragraphs.

**math**

A single fair is tossed. Find the probability of obtaining a number different than 9

**Physics! NEED HELP!**

oh then follow what bobpursley did he's on the right track

**Physics! NEED HELP!**

Do you have to select a answer or write it?

**Check my answers Ms. Sue**

Welcome

**geometry **

find the values of x , y , and z this diagram is not to scale 36 , 63 , 13 and the other three x ,y and z what are the values of them?

**Geometry**

I cant figure out how to include the pic of it

**Geometry **

6. Which of the following facts, if true, would allow you to prove that line l and m are parallel? A.angle m + angle 4= 180 B. angle 1 = angle 8 ** C. angle 6+angle 3 = 180 D. angle 7= angle 6

**math**

seven and two thirds minus six and a half

**Math**

Jody deposited $65 into her savings account. The next day, she withdrew $24. How much of her deposit remains in the account.

**Physics**

A 0.20-kg billiard ball travelling at a speed of 15 m/s? strikes the side rail of a pool table at an angle of 60°. If the ball rebounds at the same speed and angle, what is the magnitude of its change in momentum? I need help!

**Physics**

Water is lifted out of a well 30.0m deep by a motor rated at 1.00hp. Assuming 90% efficiency, how many kilograms of water can be lifted in 1 min? Answer is 137kg but can not figure it out.

**Physics**

Six identical books, 4.0 cm thick and each with a mass of 0.8kg, lie individually on a flat table.How much work would be needed to stack the books one top of the other?

**science**

Special telescopes, such as the Chandra x-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-rays give off a spectrum of light that tell astronomers what elements make up individual stars. •...

**Physics! Help!**

Vector A, a wind velocity vector, has a magnitude of 20 miles per hour and is blowing toward the North. A second wind velocity vector, Vector B, has a magnitude of 50 miles per hour and is blowing toward the Southeast. A third wind velocity vector, Vector C, has a magnitude of...

**Physics! **

A force acts on a 1.5-kg, mass, giving it an acceleration of 3.0m/s^2. (A) If the same force acts on a 2.5-kg mass, what acceleration would be produced? (B) what is the magnitude of the force?

**Physics**

Help me please??

**Physics **

A force acts on a 1.5-kg, mass, giving it an acceleration of 3.0m/s^2. (A) If the same force acts on a 2.5-kg mass, what acceleration would be produced? (B) what is the magnitude of the force?

**Emergent computer tech.**

it wont let me put the HTML code in

**Emergent computer tech.**

1. What file is being called by this IMG tag? (1 point) answer= SRC 2. What type of link is used to call this file? (1 point) answer=need help with this one 3. If the user loads this graphic in a text-only browser how will the browser describe it? (1 point) answer= i need ...

**Foundations of Math 1**

Solve the equation. 78=-2(m+3)+m A –28 B –42 C –72 D –84

**biology**

It has nothing to do with my textbook- it is just a lab my teacher is doing with us. Don't worry, I wouldn't ask the questions if I hadn't already checked my book. I am very sorry- I just don't know what to do- no one is answering my emails! Again, thank you so...

**biology**

In a pre-lab for nutrient food testing , I was assigned to answer these questions, but I have no idea what they are talking about. And no, we have not discusses the answers in class. Here are the questions: Answer the following questions: 1. What is a positive standard? 2. ...

**english 2 ( 5 questions)**

6 Read the following sentences from "When Greek Meets Greek." Fraser scratch his head. "I know of a landlord up the road who vow that ain't ever taking anybody who come from the West Indies. But he don't mind taking Indians. He wouldn't know the ...

**english 2**

6 Read the following sentences from "When Greek Meets Greek." Fraser scratch his head. "I know of a landlord up the road who vow that ain't ever taking anybody who come from the West Indies. But he don't mind taking Indians. He wouldn't know the ...

**english 2**

Can someone please please help me!!!! 1.Read the following sentences from "Lifeguard Rules!" “That’s it, Ira and Michael,” Francesca had said. "You guys don’t get a third warning. Go spend fifteen minutes out of the water. I’ll inform ...

**physics**

An apple falls from a tree and hits the ground 9.63m below. With what speed will it hit the ground? The acceleration of gravity is 9.8 meters per second squared.

**geometry**

<1 and <2 are supplementary angles. m<1is 4y+7, and m<2 is 9y+4. Find m<2 answer: 121

**Geometry**

PB is a line segment on a number line. It has endpoints at -2 and 12. What is the coordinate of its midpoint?

**Math**

Solve the following system using elimination (aka linear combination) attach an extra sheet, if needed. { 3x+2y+4z=11 { 2x-y+3z=4 { 5x-3y+5z=-1

**9th Grade Foundations of Math 1**

Thank you, Ms. Sue! I'm just not too amazing with fractions. I may need help with another

**9th Grade Foundations of Math 1**

I need to find y, yes.

**9th Grade Foundations of Math 1**

7/3y - 8 = 111 Equations.

**early chhildhood**

"Shaping" involves A. Removing reinforcers to diminish a behavior** B. rewarding each step toward a goal to teach a new skill C. using negative reinforcement to increase a behavior d. Using positive reinforcement to increase a behavior

**early childhood**

One similarity between the developmental theories of Piaget and Vygotsky is that they are both A. constructivist theories of learning throught interaction with the environment B. objectivist theories of development throught the resolution of crisis C. stage theories of ...

**Precalculus 11**

Thanks guys!:)

**Precalculus 11**

I just want to double check that I have this right. Write the new equation of the parabola y=(x-3)^2-7 that is translated 4 units left, 5 units up & is compressed by a factor of 1/4 y=1/4(x+1)^2-2 Thanks a bunch :) ?

**Emergent computer tech**

1. Text that is located between <title> and </title> appears in the browser’s ______________. answer: Tab title 2. There are _______ levels of headings in HTML. answer 6 3. If the <em> tags are around a word, then it will be ________. answer Emphasized 4...

**Introduction to Early Childhood Education **

which of the following is typically NOT a role fulfilled b general early childhood classroom teachers? Teaching children communicating with families diagnosing learning disabilites engaging in professional development**

**Introduction to Early Childhood Education**

Early childcare education professionals teach children for birth to age 3 age 3 to 6 age 3 to 8 birth to age 8** Child care centers and family child care homes provide care and educations under federal regulations**?? in cooperation with local school districks for children of ...

**Introduction to Early Childhood Education **

which of the following is not a characteristic that an early childhood educaton professional should have? Postive attitude sense of humor carelessness ** Self-regulation

**Math**

What is the best estimate for the product of 289 and 7

**Precalculus 11**

I have looked at this for 2 days & not understood but I think I get it... so you multiplied the top & bottom by -1 which made the top 5-2a but then you factored out the negative making it -(2a-5)/(5a-2) is that correct? Thank you so much for your help :)

**Precalculus 11**

(6a^2-15a)/(6a-15a^2) (3a(2a-5))/(3a(2-5a)) Multiply top & bottom by -1 -(5-2a)/(5a-2) is that correct? I have an answer here that's -(2a-5)/(5a-2) but I don't understand how to get there... Thanks :)

**Precalculus 11**

Ok, that makes sense :) thank you very much

**Precalculus 11**

If when simplifying 2 rational expressions you got: (-2(x-3))/2-x would you multiply the top & bottom by -1? Thanks!! :)?

**Precalculus 11**

Ok, thank you :)

**Precalculus 11**

When subtracting 1 rational expression from another, when I'm multiplying the top & bottom of the first term by the denominator in the second term is that number automatically negative because the whole term is being subtracted? ex: (8a-3b)/7a - (2a+5b)/4b is the 4b ...

**Precalculus 11**

That makes total sense, thank you very much :)

**Precalculus 11**

but why is the +1 on the planes side of the equation when it was the train that took an hr longer? Thanks again :)

**Precalculus 11**

It takes an express train 1hr longer to travel 240km than it does for a small plane to travel the same distance. If the plane travels twice as fast as the train, how fast does the plane travel? This is an ex., they lay out online but I'm confused about how they've laid...

**Precalculus 11**

Sorry, I meant to say any unknown variable in the denominator :o

**Precalculus 11**

OK, so then any unknown variable is negative, correct? Thanks a bunch again :) I appreciate your help

**Precalculus 11**

Hello, I'm hoping someone can explain this to me: I'm ID-ing polynomials; -x^7-5x^4+(3/x)= not a polynomial .25x^3+3.9x^2-(x/3)= polynomial Why is 3/x not but x/3 is? Thanks a bunch! :)

**Physics 11**

You're right that does make sense, I got confused & mixed up t & t. if I switch them I get 1.1s. Thank you :) I appreciate your help

**Physics 11**

Devon speeds past Tamara in his space shuttle. In Tamara's frame of reference, the shuttle moves with a speed of 0.88c. Devon's radio is blaring out music with a beat that occurs every 0.50 seconds. How often does Tamara hear the beats? I'm getting 0.24 s but it&#...

**Physics**

A glow stick is placed 18.0 cm from a converging lens that has a focal length of 8.0 cm. Determine the location of the image using both a ray diagram & the lens equation. So I'm not sure if my diagram is perfectly accurate, they just said "at least 4 squares high"...

**physics**

Oh I get it! ok thank you :) I'll make note of that. I appreciate your help

**physics **

Good chocolate is designed to melt at 34°C. A chocolate bar, originally frozen to a temp of -115°C, has its thermal energy doubled. Will it melt? It's not like temperature, so if thermal energy is doubled that means heat is being added & therefore likely it will ...

**Physics 11**

Ok thank you :)

**Physics 11**

A rose is placed 15.0 cm in front of a convex mirror of focal length 10.0 cm. I assume f= -10cm bc it's convex correct? giving me (1/-10)-(1/15)=(1/di)? Thank you

**Physics 11**

I am & I can't get it to match up... They haven't given an exact height, they just say "at least 4 squares high" but between 4 squares & my cap I can't get it to that point.

**Physics 11**

Confused about the formula (1/-f)= (1/do)+(1/-di) For locating an image for a convex mirror. A rose is placed 15cm in front of a convex mirror of focal length 10cm. Determine the location of the image using the mirror equation. (1/-10)=(1/15)+(1/-di) -0.1=0.067 + (1/-di) -0....

**Physics**

Ok thank you :)

**Physics **

When a butterfly lands 12 cm from a concave mirror, it's image is 18 cm behind the mirror. Find the focal length 1/f=(1/do)-(1/di) 1/f=(1/12)-(1/18) 1/f=0.0833-0.0555 1/f=0.0277 f=36 I'm pretty confident w/ my math but as I understood, it's do-di if it's behind...

**Physics 11**

Thanks guys!!! 99% on my midterm mainly because of your help so your time is very much appreciated :) <3

**Physics 11 **

Glycerine has an index of refraction of 1.47. What is the critical angle for a light ray traveling from: a)Glycerin into air b)Glycerin into water a) I know- n1=1.47 n2=1 angle of refraction=90 1.47(sin.anglei)= sin90 1.47(sin.anglei)=1 sin.anglei=0.6803 angle of incidence=42....

**Physics 11-Ray Diagrams**

I'm doing a ray diagram with an arrow leaning away from a plane mirror. The rays leading from the tip of the arrow to the image on the other side of the mirror lined up perfectly, however for the rays leading from the end of the arrow I can't seem to line it all up so ...

**Physics 11**

A student performs an experiment. On her desk, she directs a light ray at the flat surface of an unknown transparent material at an angle to the normal of 47 degrees. The light ray enters the material at an angle to the normal of 34 degrees. What is the index of refraction for...

**Physics 11**

I found a tutorial on youtube, he says just to do it to any point on the mirror unless otherwise specified. So I think I'm good :) Thanks a bunch!

**Physics 11**

Well that's the thing, I know what it looks like & they even went step by step in the lesson. I know that my reflected ray has to have the same angle to normal as my incident ray but I don't understand how I'm supposed to know what angle my incident ray is supposed...

**Physics 11**

I'm trying to draw a ray diagram (the image & mirror are already printed I just need to draw the rays) for a plane mirror. I understand the rules for the most part but I am confused about what angle I should be drawing the first ray from the tip of the arrow to the mirror...

**math PLZ HELP**

Which expression represents 12 times the number n? a: n+12 b: 12n c: n-12 d:n/12

**Physics**

Ok, that's a good idea, I struggle with the units sometimes so I should try & keep track anyways. Thanks again :)

**Physics**

Oh I mixed up my formula!! Thank you for catching that :) I hate stupid mistakes that I should know better than.

**Physics**

The speed of sound in a classroom is 343m/s. A) A tuning fork of frequency 512Hz is struck. What length of open air tube is required to create a resonant sound at the 1st harmonic? wavelength=v/f=343/512=0.67m L=.5wavelength=.5(.67)= 0.335m B) Fore the same tube, what tuning ...

**Physics 11**

Ok, that makes sense, thank you :)

**Physics 11**

As water waves from the ocean approach a shallow beach, their wavelengths become shorter. Explain why. v=fwavelength, frequency remains constant & velocity & wavelength decrease or increase w/ water depth. Is that a reasonable answer or are they looking for something else? ...

**Physics 11**

Ok excellent, thank you :)

**Physics 11**

The speed of water waves is 30cm/s in deep water & 15cm/s in shallow water. If the wavelength in deep water is 1.0cm, what is the wavelength in shallow water? (v2/v1)=(wavelength2/wavelength1) Therefore (15/30)=(wavelength2/1) - 15=30wavlength2 -Wavelength2=0.5cm/s A) Is that ...

**Physics 11**

Oh I get it!! Thank you very much :)

**Physics 11**

Waves travelling along a string have a wavelength of 2.4m. When the waves reach the fixed end of the string, they are reflected to produce a standing wave pattern. How far from the end are the first 2 antinodes? I know that each wavelength has 2 antinodes so each antinode has ...

**Physics 11**

Ok, I'm still a little bit confused. How do you know that it's half a wave length across? & in that case I'm saying .5 wavelength=L? & .25wavelength=each antinode? Thanks again :)