# Posts by Kayla

Total # Posts: 1,463

**Physics 203**

A hollow, thin-walled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and the horizontal.

**Physics 203**

A wheel has a thin 2.7 kg rim and four spokes each of mass 1.3 kg. Find the kinetic energy of the wheel when it rolls at 6.0 m/s on a horizontal surface.

**Physics 203**

A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg. (a) Find the speed of the 2 kg block after it falls from rest a ...

**Physics 203**

A 1.3-kg 10-cm-diameter solid sphere is rotating about its diameter at 77 rev/min. (a) What is its kinetic energy? (b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball? rev/min

**Physics 203 ( College)**

Equation: I=M*L^2 M is the mass of the object. I is the moment of inertia. L is the length squared or radius squared. I=(2.5^2(m2+m1))+ (2.5^2(m2+m3)) I= 6.25*(9)+6.25*(9) I=112.5 kg*m^2

**Physics 203 ( College)**

Four particles, one at each of the four corners of a square with 2.5-m-long edges, are connected by mass less rods. The masses of the particles are m1 = m3 = 2.0 kg and m2 = m4 = 7.0 kg. Find the moment of inertia of the system about the z axis.

**Physics 203 ( College)**

I don't know how to find ac, but I can help you with at and angular velocity of the disk. (a) (7.8 rad/s^2)/4.0s = 31.2=angular velocity at=7.8*.12=0.936

**Physics 203 ( College)**

A disk of radius 12 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 7.8 rad/s2. What are the following values at t = 4.0 s? (a) the angular velocity of the disk (b) the tangential acceleration at and the centripetal acceleration ac...

**Chemistry**

What is the minimum amount of ice (at 0 degress C) that must be added to 250mL of water at 23 degrees C in order to cool it to 0 degrees celsius? (Density of water= .98 g/cm^3; heat of fusion= 333J/g; heat capacity of water= 4.184J/g C; and heat capacity of ice= 1.86 J/g C)

**math 4th grade**

the corrct answer is 4,000,000

**Physics 203**

A puck of mass 0.60 kg approaches a second, identical puck that is stationary on frictionless ice. The initial speed of the moving puck is 5.0 m/s. After the collision, one puck leaves with a speed v1 at 30° to the original line of motion. The second puck leaves with speed...

**math**

Aviseguy

**English**

Oh. So on the first sentence, would the adverb be certain?

**English**

What is the adverb in these sentences? I got the answer, but can you check? In the past, scientists did not have much information about certain animals. Adverbs: Past, much With modern technology that has already changed. Adverbs: modern, already A cat will angrily claw. ...

**Math**

1) There are 3 adults per 15 students, so you can make a ratio 3adults/15students. 2) Next, set up the second ratio and combine where 3adults/15students = X/125students. X is the number of adults needed. 3) Arrange the equation by cross muliplying and you get 375 = 15X 4) X= ...

**6th grade math**

1) The first part of the of the problem means that for every 10 gallons of gas, you can drive 240 miles. 2) You can make a ratio where 240mi/10gal = 216mi/Xgal. 3)Then cross multiply to get 240X=2160. 4) X = 9gal

**math**

from 4 feet above a swimming pool, susan throws a ball upward witha velocity of 32 feet per second. how long does it take the ball to reach the water?

**Trigonometry**

rewrite the expression in terms of the first power of cosine. cos^3(x)sin^4(x)

**Math**

rewrite the expression in terms of the first power of cosine. cos^3(x)sin^4(x)

**Math**

Rewrite the expression in terms of the first power of cosine sin^4(x)

**Math**

if I have sin(6x)+cos(6x)how would I write it in terms of sin only?

**Trigonometry**

Yeah I got the exact value I just needed it in trigonometric function of one number which would be the degrees of cos. Thanks!!!

**Trigonometry**

cos(20 degrees+70 degrees) i mean

**Trigonometry**

so it would be cos(20+70)?

**Trigonometry**

ok I made a mistake in the formula. it's cos(20 degrees)cos(70 degrees)- sin(20 degrees) sin(70 degrees). so it's a subraction equation not an addition.

**Trigonometry**

Write the expression as a trigonometric function of one number. (cos 20 degrees)(cos 70 degrees)+(sin 20 degrees)(sin 70 degrees)

**acc. alg 2**

i dnt get bwat u did after x^2+5x-21=0. that is were i keep gettin stuck on

**acc. alg 2**

exponentiating to solve equations: solve the eaquation, cheack for extraneous solutions log5(x+4)+log5(x+1)=2

**English**

I have to write a story in the perspective of a 2 year old and I need a plot for the story. Any suggestions?

**Chemistry**

Use the chemical reaction below to answer the questions that follow. CuO(s) + H2(g) → Cu(s) + H2O(g) a. What is the limiting reactant when 19.9 g CuO react with 2.02 g H2? b. The actual yield of copper was 15.0 g. What is the percentage yield? c. How many grams ...

**math**

2x=x+3

**high school chem**

How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?

**math**

order from least to the greatest 3/10,4/5,18,20,1/20,7/10

**math**

fixed installment loan of $13,500 with 60 months to pay back, monthly payments of $280.24. instead of making 36th payment, pays remaining balance on loan. how much interest saved? use acturial method u= n*p*v/100+v

**math**

you intend to create a college fund for your baby. if you get an interest rate of 5.3% compounded monthly and want the fund to have $123,875 after 17 years, how much needs to be deposited each month? and 1 more jessica used a fixed installment loan from bank. she borrowed $13,...

**APUSH**

in the late nineteenth century: how could trusts purchase a senate seat? what were the sympathies of the national government like?

**Math**

Need to calculate the amount of building and finishing materials that you must purchase for your room. Purchases must include: Flooring Wall covering/treatment Baseboards, casing, trim Ceiling lighting In order to calculate these amounts, you must consider the following: •...

**Math for teachers**

17,576,000 : repeating 11,232,000 : not repeating

**physics**

A skier starts from rest 7m above the horizontal and slides down a frictionless slope the skier then hits a rough horizontal surface (uk= 0.3), How far does the skier travel along the rough surface before she stops?

**science**

I beleive it has something to do with cognitive

**world literature**

list two of the red herrings that The Thinking Machine sets up for the warden in "The Problem of Cell 13"

**THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT**

. Which of the following best describes the Columbian Exchange that occurred during the Age of Discovery? A. It was a genetic shift due to population interbreeding. B. It was a cultural transformation. C. It was a religious transformation. D. It was an exchange of trade foods.

**algebra**

the y-coordinate of a point decreased by 3 times the x-coordinate is greater than or equal to 2. what is that written as an equation?

**Physics**

Sketch the velocity vs. time graph for an object that: • from 0 to 2 seconds has moved with constant velocity of 3 m/s • from 2 to 5 seconds was at rest • from 5 to 10 seconds increased its velocity, reaching 5 m/s at t =10 s. Could you please help in describing...

**physics**

The picture shows a uniform ramp between two buildings that allows for motion between the buildings due to strong winds. At its left end it is hinged to the building wall , at its right end it has a roller that can roll along the building wall. There is no vertical force on ...

**chemistry**

How many milliliters of 1.9 M HCl must be transfered from a reagent bottle to provide 24 g HCl for a reaction?

**Math**

i got 7/10 for my answer but i do not kno i its right.

**Literature- Frankenstein Novel**

Please check my answer to this question: Consider the protagonist in the novel that you read this semester. In a response of no fewer than three paragraphs, explain how this character changes over the course of the novel. Include examples of these changes in your response. ...

**Literature- Frankenstein**

Victor Frankenstein changed in a few of ways throughout the novel, Frankenstein. Victor changed mentally and personality wise the most. In the beginning, Victor Frankenstein starts out acting sensibly. But, the death of his mother changed him mentally. Victor became obsessed ...

**Literature- Frankenstein**

Consider the protagonist in "Frankenstein". Explain how Victor Frankenstein character changes over the course of the novel, Frankenstein. Please include examples of these changes in the response. I have to write no fewer than three paragraphs, so please help. Thanks...

**Literature- Frankenstein**

Victor Frankenstein changed in a few of ways throughout the novel, Frankenstein. Victor changed mentally and personality wise the most. In the beginning, Victor Frankenstein starts out acting sensibly. But, the death of his mother changed him mentally. Victor became obsessed ...

**Literature- Frankenstein**

I know that "the doomed protagonist and narrator of the main portion of the story. Studying in Ingolstadt, Victor discovers the secret of life and creates an intelligent but grotesque monster, from whom he recoils in horror. Victor keeps his creation of the monster a ...

**Literature- Frankenstein**

Consider the protagonist in "Frankenstein". Explain how Victor Frankenstein character changes over the course of the novel, Frankenstein. Please include examples of these changes in the response. I have to write no fewer than three paragraphs, so please help. Thanks!

**geometry**

rectangular prism? (brick)

**Grammar! Am i correct?**

Choose the answer that identifies the underlined word. Well, I must say that your ideas are quite creative. ("creative" is underlined) direct object indirect object objective complement x predicate adjective

**Grammar! please check my answers!**

Thank you!!!!!!!! :D

**algebra**

WHAT IS THE AMOUNT OF MONEY PAID OR EARNED FOR THE MONEY USED

**chemistry**

What is the mass of 4.80 multiplied by 10-2 moles of zinc chloride (ZnCl2)?

**hellppp meee**

its not in my book

**hellppp meee**

describe the kinds of conflicts that developed as europeans settled the americas. Anaylze the effects of these developing conflicts

**social studies**

describe the kinds of conflicts that developed as europeans settled the americas. Anaylze the effects of these developing conflicts

**algebra 2**

what are the roots of the equation v^2+8v+6=0?

**algebra 2**

solve by using the quadratic equation: 5x^2+3=-7x

**AED 204**

Thank you very much, Writeacher. I corrected the mechanical errors in my paper. Thank you again for pointing these out!

**AED 204**

Write a 350- to 500-word statement that reflects on how your ethnicity influences your personal behavior, attitudes, and values. While my ethnicity is important to me, it does not control me or who I am. Ethnicity can influence my personal behavior, attitudes, and values, ...

**World History**

Thank you.

**World History**

I'm trying to answer an essay question asking me to describe Islamic principles or characteristics that are unsettling when an American considers the role that Islamic extremists have played in terrorist attacks. Any idea where to look for good examples?

**Science**

A day on Pluto lasts 6.39 times longer than a day in earth.If an Earth day lasts 24 hour how many hours is a day in Pluto?

**Chemistry**

How do I determine the noble gas configuration of Sm+3? I know the normal noble gas configuration of Sm is[Xe]6s2 4f6. Thanks!

**Math**

A cube has a volume of 24 cubic units. What is the APPROXIMATE length of each side of the cube?

**math**

a 9 foot street sign casts a 12 foot shadow. the lamppost next to it castss a 24 foot shadow. how tall is the lamppost?

**Math**

If the sales tax is 6.5%, how much tax will you pay on a jacket that costs $48?

**Math**

Thank you very much :)

**Math**

-x^2+4x=-43 I forgot how to do this? Any help would be appreciated.

**Chemistry**

How do I do molarity,molality,and normality

**Chemistry**

How do I do molarity,molality,and normality

**Chemistry**

Determine the freezing point depression of H20 in 1.50 m solution of C12H22011?

**5th grade**

I think the answer is....x=0.5 and y=1

**science**

describe how radioactive isotopes decay

**science**

Why do I have brown eyes? can it change color?

**Chemistry**

1 cal = 4.184 joules Both units are kilo, sou you can just divide by 4.184 5.72kJ/4.184J = 1.367112811kcal With sig figs it will be 1.37kcal

**6th grade**

Yay! thanks! that helped :)

**Chemistry**

The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X occurs more frequently than 13X c)12X occurs less ...

**english**

PLEASE HELP!!!!!!!!!!

**english**

i have to make analogys for my vocab words and i need help apex:peak;________:__________ Assimilate:_____;_______:_________ interim:interval;_____:_______ and also for Meander,metropolis,momentous,obstrepous,pensive perilou'shoddy,surly,and tirade

**science**

sequence the steps involved in the making of the cast of a shell 1)sdiment buries shell 2)??? 3)??? 4)mold results 5)??? 6) cast results

**science**

create a concept web to summarize the types of presevation - thnx

**6th grade**

Examples: 2/ 5 = ?/100 we multiplied the 5 with 20 to be 100 then we have to multiply the 2 with 20 as well then 2/5 = 40/ 100 40%

**English**

I need help putting my thesis into "parallel grammatical structure". Children should be limited on the amount of television they watch because not only is it filled with bad influences but it causes them behavior problems, and ultimately puts their health at risk. ...

**Chemistry**

A physical change in a substance doesn't change what the substance is. I also think it is 3. It couldn't be 1 or 2.

**math**

im sorry to put u in truble but it says to rewrite the expression

**math**

thnx

**math**

129*4-5?

**math**

i have no idea how to do this can u help me?

**math**

a running back rushed for 129 yards through 3 quarters.in the 4th quarter the running back lost 5 yards per rush. the runing back rushed 5 times in the 4th quarter. 3) imagine that instead of losing yardage on each rush in the 4th quarter, the running back gained 4 yards on 2 ...

**math**

a running back rushed for 129 yards through 3 quarters.in the 4th quarter the running back lost 5 yards per rush. the runing back rushed 5 times in the 4th quarter. 2) how many total yards did the running back have after the 4th quarter? show work

**math**

can u show the work?

**math**

im working with integers. a running back rushed for 129 yards through 3 quarters.in the 4th quarter the running back lost 5 yards per rush. the runing back rushed 5 times in the 4th quarter. 1) how many yards did the running back complete in the 4th quarter

**science**

geologists determine a rocks relative age and....?

**Math**

12x^2-20x+3 Factor. Cant figure it out.. Thanks!