# Posts by Cristina

Total # Posts: 114

**4th grade math**

2,630

**Physics**

A 238U nucleus is moving in the x-direction at 5.0x10^5m/s when it decays into an alpha particle (4He) and a 234Th nucleus. The alpha moves at 1.4x10^7 m/s at 22 degrees above the x-axis. Find the recoil velocity of the thorium. I know that the original x momentum is 238*5.0*...

**Physics**

Three children are riding on the edge of a merry–go–round that is 84 kg, has a 1.40–m radius, and is spinning at 20.0 rpm. The children have masses of 21.0, 24.0, and 29.0 kg. If the child who has a mass of 24.0 kg moves to the center of the merry–go–...

**Math**

I think 1/8 probability.

**social studies**

upon the start of WW1 what alliance was russia apart of

**world history**

A. French Revolution B. Unification of Italy C. English Civil War D. Russian Revolution

**world history**

theres four options. but that's not one of them and ive been searching all through the lesson and cant find the answer

**world history**

What revolution first popularized democratic ideas and enabled them to gain a foothold in European society?

**world history**

do you know where i could find information about the lives of the european settlers?

**world history**

i need 5 paragraphs... i only have 3 down but i want to try to make is possible my 4th paragraph about colonization.

**world history**

Before the year 1492, we couldn't really talk about a world history. The only history this world had was from different regions on earth. After Christopher Columbus discovered the New World there was alot of trading being done. Trades going from the Americas to Europe, ...

**world history**

im writing an essay and have no idea what else to write about... can i post my essay on here so that you can read it and suggest what other information i should add?

**world history**

what was the colonization of the new world like?

**science**

describe the function of each of the above organelles. in addition, compare each organelle to something else (examples: the nucleus is like a boss because both are in control of something larger

**biology**

Describe the function of each of the above organelles. In addition, compare each organelle to something else (examples: the nucleus is like a boss because both are in control of something larger)

**ALEGEBRA 1**

Your explanation is not very well done. Thank you for your time though :)

**ALEGEBRA 1**

There seems to be a lot of people needing help in Algebra 1.

**Math**

5000

**Algebra**

The difference between two numbers is 86. Seven times the smaller is equal to 4 more than the larger. What are the numbers?

**Algebra**

89

**EDUC2120**

I know the issues, but what exactly is a classical condition and operant conditioning and how can i develop a plan

**EDUC2120**

Treena is a personable student in Mr. Jordan’s math class. Mr. Jordan can see that Treena is popular with her peers. He regularly sees her conversing animatedly with her friends in the cafeteria and before and after school. She does well in class also. Her homework is ...

**Math**

Cara hiked 14 miles in 4 hours. Leslie hiked 21 miles in 6 hours. Do these rates demonstrate a proportional relationship?

**Math**

The regular price of a sweater is $32. For a sale, the price of the sweater is marked down 30%. What is the price of the sweater?

**goverment**

How would the compensation system change if the minimum wage provision of the Fair Labor Standards Act of 1938 were repealed

**fundamental concept and skills**

Which approach to literacy best connects mathematics and science to the real world? A. Balanced reading B. Phonics C. Whole language D. Structured reading c.

**concept development**

thanks

**concept development**

Choose the best example of a specific task assessment. A. Give a child two groups of marbles: a group of five and a group of eight. Then ask the child which group has more marbles. B. Ask a five-year-old child to clean the play area in 10 minutes. C. Ask a four-year-old child ...

**math**

consuelo's living room is in the shape of a rectangle and has an area of 360 square feet. the width of the living room is 5/8 its length. what is the length of the living room

**math**

marisol is painting on a piece of canvas that has an area of 180 square inches. the lenght of the painting is 1 1/4 times the width. what are the dimensions of the painting

**Math**

I divided 9/10 by 1/20 and I got 18. Is this correct?

**Math**

Liam has 9/10 gallon of paint for painting the birdhouses he sells at the craft fair. Each birdhouse requires 1/20 gallon of paint. How many birdhouses can Liam paint?

**math**

How do you find the interest and the new balance on these charge accounts? Balance=$253.00, Payment=$12.65, Unpaid Balance=$12.63, Interest Rate per Month=1.6%, Interest= , New Balance=

**Art**

value is the lightness or darkness of a color

**chemistry**

20.70 ml of .42 M HClO4 is required to neutralize .966g of an unknown base. Find the molar mass of the base .

**Biology**

Describe the function of each of the above organelles. In addition, compare each organelle to something else (examples: the nucleus is like a boss because both are in control of something larger)

**Biology**

Describe the function of each of the above organelles. In addition, compare each organelle to something else (examples: the nucleus is like a boss because both are in control of something larger)

**physics**

An archer standing a horizontal distance d=50m away from a tree sees an apple hanging from the tree at h=12m above the ground. The archer chooses an arrow and prepares to shoot. The arrow is initially 1.5m above the ground. Just as the archer shoots the arrow with a speed of ...

**College Physics**

Find the magnitude of the magnetic flux through the floor of a house that measures 21m by 13m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10−5 T pointing north, and a downward vertical component of 4.3...

**math**

that's not the answer. its how to get her to 12 is 9 more than 3 that equals 15

**math**

THANK YOU by the way!

**math**

That is my thought but how do I pose the question? I took a deck of cards for counters and tried to figure out how to go about it.

**math**

I need help teaching my 2nd grader how to come up with the answer. Easy for an adult..difficult to explain to a child. I am thinking of 2 numbers who sum is 15. One of the numbers is 9 more than the other. Got the 12 plus 3 part. Help me explain it in its simplest terms

**Intro to Physics**

You have to divide the volume by 1000

**chemistry**

describe step by step, how will you prepare 10 mL of 0.020 M HCL from the 0.050 M solution?

**science**

how has the process of natural selection helped to produce organisms which posses specific adaptions to help them survive in their environment?

**math word problems**

Container A has twice the capacity of container B. Container A is full of sand and container B is empty. Suppose 1/8 of the sand in container B will contain A is poured into container B. What fractional part of container B will contain sand?

**Social Studies 30**

I do not pretend you to make my homework I am asking for HELP. I already asked in websites and they told me to look in homework forum.

**Social Studies 30**

Which characteristic(s) of collectivism do you think are most important to Canadian society? Competition, cooperation, private property, rule of law, common good, self-interest, economic equality, collective norms, freedom, collective interest, individual rights, collective ...

**chemistry**

What is the percent by mass concentration of KCl in a solution prepared by adding 80 grams KCl to 200 grams of water?

**Pre-Calculus**

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)

**Pre-Calculus**

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)

**Spanish**

i need help with my homework. i'm supposed to form sentences using indirect object pronouns and the present tense of the verbs, but i keep getting the answers wrong i do not know what i'm doing incorrect. 1.Carmen y Sofía / mostrar / las fotos / a Milena *my ...

**Intro to Statistics**

A sample has n = 9 scores and an SS = 216. What is the variance for this sample?

**spanish**

la hija tiene hambre... the child (female) is hungry (: is this what you are asking for?

**7th grade**

is y=x/7 a direct variation????

**criminal justice 240**

CheckPoint: Drug Use and Delinquency Response Write a 200- to 350-word response answering the following questions according to the journal articles: o What are the main reasons of youth drug use? o How does drug use relate to delinquency?

**social studies**

The population in Vatican is very high so the gets very polluted. Also Hannah, try searching prezi for these answers. Especially for geography.

**trigonometry**

is to prove an identity

**trigonometry**

how to solve sin 4x= cosx(4 sinx - 8 sin ^3x)

**physics**

Romeo is tossing pebbles at Juliet's window and wants the pebbles to hit the window gently, with only a horizontal component to their velocity, as they hit the window. He is standing at the edge of a rose garden 4.5m below her window and 5.0m from the base of the wall...

**Physics**

You toss a coin straight up into the air. Sketch the velocity-time and acceleration-time graphs of the coin from the instant it leaves your hand until the instant it returns to your hand. Assume that the positive y direction is upward. Indicate on your graph the moment when ...

**English: Ms. Sue**

Ms. Sue you've helped out in the past haha maybe you can help me again :D we learned about objective and subjective opinions authors may have today and although I got every other question, I can't seem to figure out the following three: tell the objective and ...

**English**

I'm sorry I don't think I'm following. I re-read the sentences and it's obv that the answers aren't meant to be clear, but I'm finding it hard to distinguish the difference. am I supposed to separate the sentences "in half" with a part being ...

**English**

we learned about objective and subjective opinions authors may have today and although I got every other question, I can't seem to figure out the following two: tell the objective and subjective opinion in each statement and list if the subjective opinion is explicit or ...

**college physics**

Three glass Christmas balls become electrically charged when Noel removes them from the packaging material in their box. Noel hangs the balls on the tree 0.2m apart at an angle of 60 degree from each other. If each ornament has aquired a charge of 2 x 10^-10C, What is the ...

**college physics**

Three identical charges (q = +5.0mC) are along a circle with radius of 2.0m at angles of 30, 150, and 270 degrees. What is the the resultant electric field at the center?

**college physics**

A ray of light traveling in air strikes the midpoint of one face of an equiangular glass prism (n = 1.50) at an angle of exactly 30 degrees. a)Trace the path of the light ray through the glass, and find the angle of incidence of the ray at the bottom of the prism. b) Will the ...

**college physics**

The deepest section of ocean in the world is the Mariana Trench, located in the Pacific Ocean. Here, the ocean floor is as low as 10,918m below the surface. If the index of refraction of water is 1.33, how long would it take a laser beam to reach the bottom of the trench?

**college physics**

What is the speed of light moving through a medium of index of refraction 2.45?

**college physics**

As wavelengths decreases, energy _____.

**college physics**

Light may be considered to travel as a ________ or a ________.

**physics**

The deepest section of ocean in the world is the Mariana Trench, located in the Pacific Ocean. Here the ocean floor is as low as 10,918m below the surface. If the index of refraction of water is 1.33, how long would it take a laser beam to reach the bottom of the trench?

**physics**

what is the speed of light moving through a medium of index of refraction 2.45?

**physics**

As wavelength decreases, energy ?

**Physics**

light may be considered to travel as a ? or a ?

**Physics**

how do you solve for amplitude?

**East hem.**

When did Rome become a republic?

**chemistry**

a solution that is 0.170 M in sodium formate (HCOONa) and .200 M in formic acid (HCOOH)

**ethics**

what are some methods sociologists use to measure prejudice

**math**

The answer would be 4 45+45+45+45+30=210 since 30 is the flat, its not considered an hour.

**Science - Physics**

Count the teeth in the front and rear gears in speeds 1, 5, 6 and 10 for a ten-speed bike. Record your data in the table and figure the ISA (speed advantage) and the IMA (mechanical advantage)for each speed. (The diagram shows a rear gear with 34 teeth and front gear with 52 ...

**college biology**

____________ are distributed throughout the body, making up the monocyte-macrophage system or reticuloendothelial system.

**science**

if the spectrum of a star indicates that the star shines with a red light, approximately what is the surface temperature of the star?

**math**

because 24005 is a bigger number than 8999

**math**

they r both rare lol jk idk

**interm. algebra**

factor completely: x^2 + 2xy + y^2 − 2xz − 2yz + z^2 i don't kno wat 2 do at all???!!!!???

**intermediate algebra**

wat about the 2's????

**intermediate algebra**

factor completely: x^2 + 2xy + y^2 − 2xz − 2yz + z^2

**Calculus**

shouldnt u put it in as (1/1)-x im not sure but try dat

**Spanish**

i am 15 years old i am very good thank you i am jannie gooden

**inter algebra**

solve: 4x+1/6 + 2x-3/5 = 4/15

**inter algebra**

solve: 4x+1/6 + 2x-3/5 = 4/15

**intermediate algebra**

solve: 3/4x + 2/5 - x =3/10

**Spanish**

it says your friend doesnt know how to get to school from your house. Give full addresses using mandates affirmative relatives

**intermediate algebra**

yes factoring and thanx!

**intermediate algebra**

x^2−2xy+y^2−9

**Espanol**

it says your friend doesnt know how to get to school from your house. Give full addresses using mandates affirmative relatives

**12th grade government/economics**

what margin is required to choose the president?