# Posts by sophia

Total # Posts: 264

**Physics**

An ice cube tray of negligible mass contains 375 g of ice at -5.00 C. What minimum amount of heat must be added to make all the ice into water?

**science**

How are suspensions and solutions similar? How are they different? (can use a Venn diagram) I do not understand how these are similar.

**Physics**

A half pipe can be thought of as half of a cylinder with radius of 7.00m. If a skater with mass 75.0 kg, starts with an initial velocity of 5.00 m/s at the top of the ramp, (a), what is his velocity at the very bottom of the ramp? The skater then approaches the other quarter ...

**French**

It may seem like a lot, but It's Not! 1. I reserved a one way ticket. J’ai réservé un aller simple. 2. We’re fastening our seatbelts. Nous sommes attachons notre (nos?... what’s the difference) ceinture de sécurité. 3. The train ...

**Math**

Write a story problem that can be represented with 1152÷24

**Biochemistry 105**

8. Arrange the following molecules in the order of increasing polarity. a. (PH3, HCl, H2O, CCl4) b. (NH3, HF, H2O, HBr)

**physics**

i think its coal am i right yet i still think its gas ???

**physics **

The energy source used to produce most of the electrical energy in the United States

**physics **

A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s2.) Show your work for credit.

**math**

I have to use matrices for this one

**math**

Three softball teams ordered equipment from the same catalog. The first team spent $285 on 5 shirts, 4 caps, and 8 bats. The second team spent $210 on 12 shirts and 6 caps. The third team spent $250 for 7 shirts, 10 caps, and 3 bats. What were the catalog prices for shirts, ...

**College Stats**

Suppose that two random variables X1 and X2 have a bivariate normal distribution, and Var(X1) = Var(X2). Show that the sum X1+X2 and the difference X1? X2 are independent.

**math**

maya and winston share some cookies in the ratio 2:3. maya had 3 fewer cookies than winston how many cookies they share altogether?

**Chemistry**

1. A student collected the following data for a fixed volume of gas: Temperature (?C) Pressure (mm of Hg) 10 726 20 750 40 800 70 880 100 960 150 ??? Fill in the missing data point. Show all calculations leading to an answer.

**Chemistry**

well thank you for your information :)

**Chemistry**

Which of the following is true about oxidation reactions? A. Oxidation reactions are the principal source of energy on Earth. B. All oxidation reactions are accompanied by reduction reactions. C. The burning of wood in a fireplace and the metabolization of food by your body ...

**Chemistry**

A plasma reaction converts A (Molecular weight = 200) to B and uses NAD as a co-substrate and produces NADH as a by product (1 mole of NADH is produced per every 1 mole of A converted to B). The amount of NADH can be determined by monitoring its’ absorbance at 340nm in a ...

**French**

Are the sentences correct in passé composé? I have to use 3 separate verbs, pensé, aimé, 1. J'ai pensé que je venais d'attraper un rhume et me demandais d'où il pouvait venir aussi soudainement. 2. Nous avons aimé la...

**Math**

In math class, a student has an average grade of 85% for five tests so far. What grade must that student earn on the next test to reach an average grade of 90% for all six tests?

**maths**

amelie is x years old her sister is four years older her brother is three times her age the sum of their age is 44 years

**French!**

Please if possible, respond to this and the other question by 11:00 a.m tmrw. 11/15/16 . Thankyou! ____________________________________ The next part is asking for active voice into passive but I'm not sure how to change it. Really Confused! I need help. Transforme ces ...

**French**

How do I translate these in passive voice? I don't understand. Help 1. On communique les résultats financiers aux employés. = Les résultats financiers …………………… aux employés. 3. On soumet les ...

**math**

Carlita saw 5 times as many robins as cardinals while bird watching. She saw a total of 24 birds. How many more robins did she see than cardinals

**math**

Ms.Nikkel wants to divide her class of 23 students into 4 equal teams.Is this reasonable?Why or why not

**MATH HELP PLEASE I HAVE NEVER BEEN MORE CONFUSED**

The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years.

**math**

The value of a car decreases at a constant rate as it grows older. When the car is 2 years old, it is worth $23,000. When the car is 5 years old it is worth $15,500. Write and equation relating y (value of the car $) to x (age of car).

**math**

steve how did you get that

**math**

The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years.

**Physics**

A superhero flies 185 m from the top of a tall building at an angle of 15◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m. Your answer must be...

**Physics**

A truck travels beneath an airplane that is moving 150 km/h at an angle of 34◦ to the ground. How fast must the truck travel to stay beneath the airplane? Answer in units of km/h.

**Physics**

What is the direction of this resultant vector (between the limits of −180◦ and +180◦ from the positive x-axis) ? 1. −88◦ 2. −117◦ 3. −144◦ 4. −143◦ 5. −135◦ 6. −171◦

**Physics**

maybe number 4

**Physics**

Consider two vectors F~1 with magnitude 69 N inclined at 177◦ and F~2 with magnitude 58 N inclined at 286◦, measured from the positive x axis with counterclockwise positive. What is the magnitude of the resultant vector F~1 + F~2 ? Draw the vectors to scale on a ...

**Phyics**

Bob heads out into a lake at an angle of 41◦ with respect to the shore. If his boat is capable of a speed of 1.7 m/s, how far from land will he be in 7 min and 17 s ? Answer in units of m.

**Physics**

A person walks 21 m East and then walks 34 m at an angle 32◦ North of East. What is the magnitude of the total displacement? Answer in units of m.

**Science-chemistry**

How do I calculate the amount of heat will be required to make 100.0kg of a compound, the molar enthalpy is -63kj/mol for the same compound

**math**

how do you explain a number pattern

**Physics**

The Olympic record for the marathon set in 2008 is 2 h, 6 m, 32 s. The marathon distance is 26 mi. What was the average speed of the record-setting runner in km/h?

**Maths**

An amount of money is shared by three people in the ratio 2 : 5 : 8. What fraction of this money is given to the person who receives the smallest share?

**physics**

A car accelerates from rest at 1.0 m/s^2 for 20s along a straight roa, it then moves at a constant speed for half an hour, it then deccelerates uniformly to a stop in 30s. Find the total distance covered by the car.

**math**

a jewelry company makes charms in a 2 x 2 x 3 inch box. They ship the charms in a 3 x 4 x 5 inch box. how many of the smaller boxes can fit into the larger box to ship the charms? the first is 2 x 2 x 2 = 12 the second is 3 x 4 x 5 = 60. However, the answer is not 5. Thanks ...

**math**

a jewelry company makes charms in a 2 x 2 x 3 inch box. They ship the charms in a 3 x 4 x 5 inch box. how many of the smaller boxes can fit into the larger box to ship the charms? the first is 2 x 2 x 2 = 12 the second is 3 x 4 x 5 = 60. However, the answer is not 5. Thanks ...

**Statistics**

For a set of scores with a mean of 111 and a standard deviation of 8, what is the percentile rank of 90? (round to two decimal places, no leading zeros)

**Chmistry**

Write a balanced chemical equation for the combustion of acetylene if the products are: a) Carbon and water vapour b) Carbon monoxide and water vapour c) Carbon, carbon dioxide. Carbon monoxide and water vapour d) The complete combustion of acetylene

**math**

I=PRT I=900*0.09*3 I=243 243+900 1143/36 Answer=$31.75 monthly

**Algebra 1 college**

How much of a 12% saline solution should be mixed with a 4% saline solution to obtain 40 milliliters of a 6% saline solution?. Use a system of equations and elimination method to solve. can someone please see if I am on the right track. 12T + 4F=6x40 -4 -4F 4 8T=2x40 8T=80 8T/...

**Math**

64

**English**

#4 was The narrator usually enioyed writing, but(she diliked her latest writing assignment.) -IC Thank you for your time and help!

**English**

My homework is about identifying independent and dependent clauses The sentence in () marks is the clause they're asking for. 1. The narrator's mother worked on her inventions at night, (after her husband fell asleep) - Dependent Clause 2. She would work on an idea, ...

**Language Arts**

Yes it's B

**Algebra**

Suppose you want to enclose a rectangular garden plot against a house using fencing on three sides, as shown at the left. Assume you have 50 ft. of fencing material and want to create a garden with an area of 150 ft². A. Let w = the width. Write an expression for the ...

**Math**

The area of a rectangle is fixed at 150 square feet. For what lengths will the width be less than 10 ft?

**Math**

1. the points given are two of the 3 vertices of a right triangle. Which could be the third vertex of the triangle given 2 points are (-4,-5) & (3,2) ? 2.) A circle with center O and radius r is intersected at 2 distinct points by line l. Which is true? a. The distance between...

**English & Composition**

Thankyou! If I do need other help, I'll be sure to ask you. Can you please mark my question that way when I ask a question, you can hopefully go back to it and help. Much appreciated

**English & Composition**

What can I include & How can I include it as far as "Transition" to the "Background" ?

**English & Composition**

The prompt to this formal essay I have to write is : How do Thoreau in "Civil Disobedience", Gandhi in "On The Eve of Historic Dandi March", and MLK Junior in "Letter from Birmingham Jail reflect the spirit of optimism? ...

**Precalc**

suppose you want to invest $60,000 for ten years. You can invest your money in a CD that earns 4% interest, compounded quarterly and has no risk, or you can invest your money in futures that ear 10% interest, compounded quarterly. However, the second investment has a 25% ...

**Physics**

its 67

**CHEMISTRY! HELP**

1. Given the following set of quantum numbers: 3py -1/2. A chemistry student claims that this represents a peanut-shaped electron. Is she correct? Answer (Am I correct? If not, how?) : She is correct because 3py is a peanut shape with -1/2 being the spin. 2. A chemistry ...

**English & Comp.**

Your link Ms.Sue didn't really help me out. It just pointed where the quote was at in MLK's letter

**English & Comp.**

What is after the - is what I have to identify what rhetorical device it is.

**English & Comp.**

I had to write what type of rhetorical device was used. Some I wasn't sure of.

**English & Comp.**

Are these right? I wasn't sure of 2 of them. It'll be in parenthesis. Literary Allusion -(Ross’s line in Shakespeare’s Macbeth): “Let not your ears despise my tongue forever.” 26. - the principle guiding the art of writing effectively, eloquently, ...

**Chemistry(MOLEDAY)**

I created my Mole: MOLE'YMPICS *(Olympics)*... That is my Mole-word or Phrase but Idk if my descriptive caption below would be a phrase. I don't know what my descriptive caption could be. Or at least Idk how to make it FUNNY or HUMOROUS? My original Descriptive caption...

**Math (help)**

find the zeros of the function: f(x)=2x^4 -x^3 +7x^2 -4x -4 ...

**Pre calc- confused**

Geometry/Maximum area: A rancher wants to enlarge an existing rectangular corral such that the total area of the new corral is 1.5 times that of the original corral. The current corral's dimensions are 250 feet by 160 feet. The rancher wants to increase each dimension by ...

**physics**

Two racing boats set out from the same dock and speed away at the same constant speed of 120 km/h for half an hour (0.500 h), the blue boat headed 23.7° south of west, and the green boat headed 34.4° south of west. During this half-hour (a) how much farther west does ...

**Math**

Using the break apart method what is the best way to multiply 8x7

**Chemistry**

In the last part of this experiment, the temperature of tap water was recorded for fifteen minutes as the tap water was heated in a beaker. Identify the dependent and independent variable. (THE TEACHER Just said THE DEPENDENT AND INDEPENDENT VARIABLE but idk if he/she wants ...

**collocation**

1.Analyze the occurrences of collocation used in the below article Puffin Therapy The Atlantic puffin simply vanishes for months at a time. But when it returns to land, the fearless, clown-faced seabird is a sight that soothes the soul of many a bird-watcher. Here they come, ...

**Algebra**

A baker bakes a batch of muffins and splits the batch evenly onto six different trays. She then adds five croissants to each tray. If each tray now contains at least twenty baked goods, what is the least possible number of muffins in the baker's original batch? I don't...

**Chemistry**

How much SO2 is needed to saturate 50g of H2O at 5 degrees Celsius

**error analyze**

Can you check grammar error in this text? What can you do to reduce global warming in Thailand? Nowadays, The problem global warming is main problem for everybody in the world. It is effect on change of weather that the world have temperature highest. In Thailand, the problem ...

**Math**

12/3 it 21/3

**Math**

Alan scored a total of 14 points for answering all the 15 questions on a math quiz. For every correctly answered question, Alan got 2 points. For every wrong answer, he lost 2 points. How many questions did he answer correctly?

**Math**

Idk

**Math**

An unfair coin with Pr[H] = 2/3 is flipped. If the flip results in a head, then a marble is selected from an urn containing 9 red, 1 white, and 1 blue marbles. If the flip results in a tail then a marble is selected from an urn containing 10 red and 3 white marbles. If the ...

**science**

How much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?

**physics**

how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?

**Math**

Leena bakes a loaf of bread. She eats 1/8 of the loaf and gives 1/6 of it to each of her 3 friends. What fraction of the loaf of bread is left?

**Spanish**

Thank you so much for your help! I have one last question: Form the command using the correct pronoun/s to a friend: Don't make a salad for me!

**Spanish**

Can someone check my answers to this? I'm really confused on these practice problems. Thanks! Directions: Using informal, formal, plural and nosotros commands (use Dop's/Iop's if needed) to correctly answer the questions. The names in parathenisis are what form the...

**language arts**

how to diagram this sentence...The basketball team with the winning record will advance forwards.

**Math**

How can you use decimal squares to represent the product 0 * 0.7?

**language arts**

how to diagram preepositional phrases

**Child Development**

Ms. Sue is FAKE!! She answers every question in less than 20 minutes!!

**chemistry**

What mass of the metal must be heated to 95 degrees celsius in order to be used to warm 2.548 L of water from 18.1 to 22.5 celsius

**World Regional Studies/ Geography**

In January 2000, cyanide is released to the Tisza River in Hungary. Effect 1: Effect 2: Water Pollution Countries develop industries. Effect 1: Effect 2: Poland’s water in most rivers is unsafe to drink Rain washes fertilizers from fields into bodies of water The ...

**Math**

List out the elements of the set "The letters of the word Mississippi"

**math**

a set of five positive integers has a mean median and range of 7 how many distant sets whose members are listed from least to greatest could have these properties

**Psychology**

Describe the chi-square goodness-of-fit test.

**Psychology**

Can you give a real world example of when you would use a chi-square test of independence and a chi-square goodness of fit?

**Math 6**

ohhhhhhh 66 choices!!! Thanks!

**Math 6**

n ice cream stand sells chocolate, vanilla, and strawberry ice cream as well as a choice of 22 toppings. How many choices are there for a single flavor of ice cream with one topping? How do I do this? is it 46 choices? Am I right?

**physics**

Initial velocity not given. Assuiming that we need to solve for it. Yes, the ball is thrown 60 degrees above the horizontal. Thank you.

**physics**

If I am standing on top of a building that is 350 ft. high and I throw a baseball off the roof at angle of 60 degrees, determine how long the ball is in the air as well as how far it lands from the building.

**Science**

Which statement is true regarding nuclear energy? 1. Nuclear power produces no greenhouse gasses and thus poses no environmental threats. 2. Nuclear plants rely on a massive industrial infrastructure using fossil fuels. 3. Due to strict safety regulations, nuclear power does ...

**ela**

in the poem lineage what does they mean

**math**

16 I'm in college so I should know this 😋😃☺

**please help me!! with this science!!!!!**

ONLY Elizabeth is RIGHT. ONLY HER.