# Posts by sam

Total # Posts: 5,280

**Art**

Why is art fun

**Physics**

Fred and George who are identical twins, same body mass, are competing in aerial skiing. Fred hits the take off with a speed of 15.8, whereas George has a speed of 8.3. How much higher will Fred go?

**Problem Solving: Make a Table**

Water for irrigation is measured in acre-feet. One acre-foot is the volume of water that would cover one acre of land to a depth of one foot. How many acre-feet of water would it take to cover 600 acres to a depth of one inch?

**Language Arts 6A**

Which of theses is a category used in the passage to contrast falcons and hawks?

**english**

The film image thus became almost square during the early years of the talkies until the space occupied by the sound track on the film was successfully reduced. Can someone explain to me what this mean? I don't understand.

**English**

What's the answer? A?

**Spelling**

I am working on synonyms and diagraphs. I need a 7 letter word, that means finished. The third letter is r. Fifth letter is probably u.

**Chemistry**

A 38.5 mL sample of HBr is titrated with 112 mL of 1.05 mol/L KOH. The density of the HBr solution is 1.75 g/mL. Calculate the percentage by mass of the HBr in the sample. How come we don't use density*volume to find the moles of HBr?

**Chemistry**

30.0 mL of 0.0200 mol/L NaOH are added to 70.0 mL of 0.0100 mol/L HCI. Calculate the [H3O+] and [OH─] of the resulting solution My answer: [OH-] = 1.00x10^-10 M; [H3O+] = 1.00x10^-4 M Teacher's answer: [OH-] = 1.00x10^-11 M; [H3O+] = 1.00x10^-3 M Am I missing ...

**Chemistry**

50 Ltr. Of a certain liquid is confined in a piston system at the extenal pressure 100 atm this pressure suddenly released and liquid is expanded against a contant atm pressure , vol. Of liquid increases by 1 Ltr and the final pressure of the liquid is 10 atm. Find the work done.

**physics**

Conserve momentum

**Chemistry**

A piece of copper alloy with a mass of 73.0 g is heated from 23.0◦C to 44.0◦C. In the process, it absorbs 558 J of energy as heat. What is the specific heat of this copper alloy?

**Math**

Can you explain how you got that please?

**Math**

A van travels for 3 hours at an average speed of 40 mph. How much longer must the van travel at an average of 55 mph so that the average speed for the entire trip will be 50 mph?

**Algebra**

Thank you!

**Algebra**

You are choosing between two different internet providers. Company A charges $75 for installation and $42 per month. Company B charges $30 per month for installation and $45 per month. After how many months will the total costs for Internet service through the two companies be...

**Math**

Yes thank you!!!

**Math**

You are offered two different sales jobs. Job A offers an annual salary of $36,000 plus a year end bonus of 1.5% of your total sales. Job B offers an annual salary of $32,000 plus a year end bonus of 2% of your total sales. How much would you have to sell to earn the same ...

**PreCalculas**

Ok thank you i don't know what i was doing wrong

**PreCalculas**

write sqrt36*3sqrt64 using exponential notation i keep getting 24 so am i doing it wrong or is that right im confused

**Pre-Calculus**

f(x) = cos(x) on the interval [−2π, 2π] (a) Find the x-intercepts of the graph of y = f(x). (Enter your answers as a comma-separated list.) (b) Find the y-intercepts of the graph of y = f(x). (Enter your answers as a comma-separated list.) (c) Find the ...

**Chemistry**

How to find the mass of a solid formed when: 45.00ml solution of 0.003 800 mol/L lead (II) nitrate is mine dish a 30.00 mL solution of 0.08800 mol/L strontium iodide

**Chemistry**

what mass of barium carbonate will dissolve in a 2.50L solutions of 0.0500 molar sodium carbonate

**writing**

lol cheat is right

**writing**

Here is what I wrote. Both Ernesto from barrio boy and the boy in "A Day's Wait" interact with adults. Ernesto interacts with Miss Ryan, while the sick boy interacts with his father. Compare and contrast how the boys interact with the adults. Focus on how the ...

**Math**

True or false: If a is any positive real number, the graph of y=a^x will go through the point (0,1). True or false: x^3+2x^2 is an exponential equation because it contains exponents. I got true for both of them is that right?

**Algebra 2**

Find the vertex of each of the following parabolas by averaging the x intercepts. Then write each equation in graphing form. Y=x^2-14x+40

**Algebra 2**

Find the vertex of each of the following parabolas by averaging the x intercept. Then write each equation in graphing form. Y=(x-3)(x-11)

**Social Studies**

Yes.

**Social Studies, Ms. Sue, Reed, Check My Work**

@Ms. Sue, Please review my answers.

**Social Studies, Ms. Sue, Reed, Check My Work**

1. Geographers use the five themes of geography to (2 points) study world history. organize information. study world music. measure locations.• 2. People invented flat maps because globes cannot show (2 points) names of continents. shapes of continents. enough detail.&#...

**English**

Choose the sentence that is written in active voice. A. A serious accident was prevented on the highway by Roger's quick thinking. B. Roger's quick thinking prevented a serious accident on the highway. C. A serious accident was prevented on the highway. D. A serious ...

**physics**

filament lamp: cost-80p efficiency-0.2 expected life- 1000 hours compact fluorescent lamp (CFL): cost- £3.00 efficiency-0.8 expected life- 8000 hours A filament lamp with a power rating of 100 w gives 2000 units of light. what power rating would a CFL need to provide ...

**chemistry**

I have two that I can not figure out: #1: calculate the MOLALITY of 10.00 g/L of the salt, if its molar mass is 100.0 g/mol and solution density D=1.100 g/mL work: 10.00 g NaCl x (1mL/1.100g) x (1kg/1000 mL)= 0.00909 kg 100.0 g x (1 mol NaCl/58.4 g Nacl)= 1.7 mol 1.7/0.0090= ...

**Philosophy**

In this case, there is not a fallacy of relevance. While it certainly does appear to be an ad hominem attack on Wolf at first, if you look carefully, you can see that the response from World Press Review is relevant to the argument being made. A quote from the source of this ...

**English**

You are right. "a" All of the others are present in the story.

**Check My Work Social Studies, Ms. Sue, Reed, Please**

Is 1 to study world history, or is it to organize information, @Ms. Sue

**Check My Work Social Studies, Ms. Sue, Reed, Please**

Correction- 2. People invented flat maps because globes cannot show (2 points) names of continents. shapes of continents. enough detail.•• 5. Ocean currents follow regular patterns related to (2 points) latitude.•• volcanoes. hurricanes. longitude. 8. Which...

**Check My Work Social Studies, Ms. Sue, Reed, Please**

1. Geographers use the five themes of geography to (2 points) study world history. organize information. study world music. measure locations.• 2. People invented flat maps because globes cannot show (2 points) names of continents. shapes of continents.• enough ...

**columbia high**

160 divided by 8 is 20. There is your answer.

**Math**

Bird flies 80m east, then 60m south, then straight up In to sky for 30m. A)at this point how far is bird from his nest?

**math**

Waiting for solution

**math**

Hey pls pls solve it for me.

**math**

A fruit seller buys 100 bananas for Rs 40. Twenty bananas are spoiled and thrown away. At what rate should he sell the remaining so as to gain 10% ? Pls give me the solution of it.

**math**

Thnx

**Geometry**

for the second question it is (0,0)

**math**

Sara estimated 23 x 43 using 20 x 40. Sam estimated 23 x 43 using 25 x 40. Will Sara's or Sam's method give an estimate closer to the exact answer?Explain.

**math**

A golf practice range has 245 balls. The owner bought a carton of golf balls.How many golf balls does the owner have after buying the carton? Golf Balls 12 balls to a box 15 boxes to a carate 5 crates to a carton pls help by explaining me Thank you

**Social Studies (Ms. Sue) Please Proofread**

Thank you, they were correct!

**Social Studies (Ms. Sue) Please Proofread**

1. Population density is the number of people that live in a region divided by the number of (1 point) roads. square miles or kilometers in the region.•• waterways. people who used to live there. 2. How do demographers figure out population growth? (1 point) by ...

**Chemistry**

What is the concentration of lead ions in a solution if they are completely precipitated from 36.3 mL of solution by 29.6 mL of 0.35M potassium iodide.

**History**

The answers are C B D

**math**

Find the orthocentre of the vertices QRS. Q(2,6), R (-3,1) and S (6,2).

**Social Studies**

In what ways were diverse people from the Arabian Peninsula through the Middle East, North Africa, and into Spain united? What held them together and unified them, and how was this done? The time zone was between 500 to 700 CE.

**Math**

The blood vascular system consists of blood vessels (arteries, arterioles, capillaries, and veins) that convey blood from the heart to the organs and back to the heart. This system should work so as to minimize the energy expended by the heart in pumping the blood. In ...

**science**

Perfluorotributylamine (PFTBA) is found in extremely low concentrations (0.18 parts per trillion) but it has a great impact on climate. If Pftba concentrations increase, predict what will happen to the climate. Please help?

**science**

pftba is found in extremely low concentrations (0.18 parts per trillion) but it has a great impact on climate. if pftba concentrations increase, predict what will happen to the climate

**Math**

2.87

**physics**

An object of mass 2kg is pulled to the right w/a force of 20N. The force makes an angle of 20o w/ the displacement axis. If the interface is rough w/a coefficient of kinetic friction 0.3, what's the net force along the diaplacement axis?

**Organic Chemistry**

23.78

**Genetics/Bio**

...don't bother replying if your response is 'idk.' The answer to your first problem is 'splicing.' My book mentions snoRNA's role in rRNA modification, assembly and cleavage. tRNA molecules have more than 4 standard nucleotides, the amino acid is ...

**Physics**

It is C.

**Physics**

Which of the following summarizes Rutherford's model of the atom? a. Electrons are embedded in a positive region of spherical dimension. b. Electrons revolve around the nucleus without emitting radiation. c. Electrons revolve around the nucleus like planets move around the...

**Science**

btw nobody is gonna answer your question bc there are no science tutors on this website

**Language**

Depends on why you're asking?

**Language**

It's just as exasperation when you discover the definition of "evocation" is "the act or fact of evoking" If you rewrote this sentence beginning with "nor are you" the next words are: 1) just as exasperated 2) exasperated any lesser 3) any ...

**Language**

I think it's number one..right?

**Language**

When you're told that there are no jobs. And it is time for some fast thinking. What would be the correct thing to put in? 1) jobs, it 2) jobs, and it

**English**

what is the PA in question 13?

**Language**

Thanks

**Language**

Consider an example in which both cars are insured by the same plan. Is there supposed to be a comma after "example"?

**history**

I did but still couldn't find the answer to the question. could u plz help me out?

**history**

International efforts are being made to safeguard against the misuse of weather modification. An example of the potential to "misuse" the weather is 1)eliminating droughts and deserts in the world 2)preventing floods in flood-prone areas 3)creating droughts or floods...

**trigo**

please po help me. A chimney projects 6 feet above the roof. At a point 10 feet 8 inches down the roof from the base of the chimney,the chimney subtends an angle of 17°40' . find the angle at which the roof is inclined to the horizontal.

**math**

I used a calculator And it said 8

**math**

josh ran for 56 minutes and walked for 16 minutes. What is the ration of the number of minutes ran to the number of minutes walked?

**Geometry**

Find the distance between the lines with the equations y = 3/2x+4 and −3x+2y = −1. Round your answer to the nearest tenth.

**geometry**

(2,-7)

**math**

a growing number of colleges are teaming up with banks to issue student id cards that double as debit cards. There were 51 partnerships in 2001. This number grew 10 126 in 2008. What is the percent of increase?

**Algebra**

10% copper 5% something else. I think

**Calculus**

how much paint is used to paint 500 rubber balls of radius 5 inches of the paint is 0.02 inches thick

**maths**

Suppose that a state university has to form a committee of 5 members from a list of 20 candidates out of whom 12 are teachers and 8 are students.If members of the committee are selected at random,what is the probability that the majority of the committee members are students?

**Physics**

I don't know

**ELA**

thank you MS. Sue, our class is having trouble with plurals. Itold my friends to use this sight also. We have been doing this home work for the last hour. Thanks again

**ELA**

write each phrase to make it a plural, singular possessive ,or a plural possessive. the tail of the raccoon. more than one sweater. the leaves of the trees. Thank you for any help

**Math- word prolems**

You need to do the fencing of two side by side areas with 102 meters of wood fencing. What is the maximum area that you will be able to enclose?

**Math- word prolems**

Making a cylinder is costing your company $2/in^2 for top and bottom and $6/in^2 for the body(side). If the cylinder is to have 166.25oz volume, what are the most economical cylinder that you can make and what will be the cost of making it.

**History**

Yah I got the 2 inuit websites from one but do you know any for Shawnee?

**History**

Select two groups of Native American people from two different areas within the united states.(I chose the Shawnee and the Inuit) The areas you can select from include North, West,Southwest, Plains, and East/Southeast. Explain how environmental factors influenced their home ...

**Chem**

Yes, but drop the 2s since it would be equivalent without them.

**Statistics**

A restaraunt offers a dinner special that lets you choose from 10 entrees, 8 side dishes, and 13 deserts. You can choose one entree, two side dishes, and one desert. How many different meals are possible?

**History**

Which factor BEST explains why Native Americans were able to make permanent settlements?

**chem 150**

10. Calculate the concentration of a solution made by diluting 10.00 mL of 0.1104 M HCl to 25.00 mL, then taking 10.00 mL of that solution and diluting to 50.00 mL.

**MATH**

so -3x13 would give you the answer. how did you come up with that ?

**MATH**

the temperature of a chemical compound was 0 degrees Celsius at 10:00 AM. During a reaction, it dropped 3 degrees Celsius per minute until 10:13 A.M. What was the temperature at 10:13 A.M?

**Algebra 2**

Solve each system 6x-2y=10 3x-2=y

**Math Decimals**

5.0

**Chemistry**

1.how many total oribitals are present in quantum #1 2. How many electrons are possible in quantum level 1 3. How many total or initials are present in quantum level 3

**Algebra 2**

Solve each system 6x-2y=10 3x-2=y

**ART PHOTO QS HELP!!!!**

what digital cameraS use for photoshoot?