# Posts by Emma

Total # Posts: 1,721

**calculus**

The area A = πr2 of a circular water ripple changes with the radius. At what rate does the area change with respect to the radius when r = 4ft?

**calculus**

The height of a cylinder with a fixed radius of 4 cm is increasing at the rate of 2 cm/min. Find the rate of change of the volume of the cylinder (with respect to time) when the height is 14cm.

**Social Studies**

Thank you Maddie. :)

**English**

A IS THE ANSWER

**physics**

60 cubic feet of air at 30 PSIG and 50 degrees F is compressed to 80 PSIG and 110 degrees F. What is the final volume?

**physics**

A hydraulic cylinder has to overcome a force of 12,600 pounds on the extend stroke and 9,375 pounds on the return stroke. The maximum system pressure available is 2200 PSIG. What is the smallest diameter cylinder required to overcome the load and what is the maximum diameter ...

**fluids**

An open tank holding 400 cubic foot of air at atmospheric pressure at 70 degrees F and heated to 160 degree F. What is the volume of air that escapes from the tank?

**fluids**

A 2inch diameter pipe has been chosen to pass 65 GPM. Can this diameter be used for the suction line? If not , what line diameter should be specified?

**fluids**

What are the three benefits of a fluid system as the prime mover in a system? Explain each benefit.

**physics**

A 2inch diameter pipe has been chosen to pass 65 GPM. Can this diameter be used for the suction line? If not , what line diameter should be specified?

**physics**

. An open tank holding 400 cubic foot of air at atmospheric pressure at 70 degrees F and heated to 160 degree F. What is the volume of air that escapes from the tank?

**fluids**

. A nut is frozen on a shaft and it will take a minimum 190 foot pounds to break it free. How long a cheater (extension) will a 120 pound person need to put on to an adjustable wrench with a 6inch handle?

**fluids**

60 cubic feet of air at 30 PSIG and 50 degrees F is compressed to 80 PSIG and 110 degrees F. What is the final volume?

**fluids**

A man unloads a truck that has 25 15 pound cinder blocks to a pallet 12 feet away. A. How much work has he done?B. How much power if he finished in 8 minutes?C. How much HP was exerted?

**social studies**

Berlin

**math**

Today

**history**

@Ms.Sue Please check

**history**

which of the following was an effect of the assembly line? A) it made workers want to return farms B) it made clothing more expensive to produce C) it increased demands for worker compensation D) it drove down the cost of clothing production Who introduced the idea of ...

**History**

@Ms.Sue please check

**History**

1. How did new England's textile industry affect both children and women? a) It allowed them to earn a living wage until the age of 25. b) It gave them opportunities not available on family farms. c) It permitted them to complete their schooling. d) It provided long-term ...

**Physics**

Mass m1 = 0.5 kg moves with constant velocity v1i = 2.5 m/s along the x-axis and collides with mass m2 = 2.6 kg, which moves with velocity v2i = 3.1 m/s, as sketched below(completely vertical). After the collision, m1 and m2 stick together. a.) Find the angle, θ, between ...

**L.A**

It is C. I just took a test for an online school I attend. It gave me the answers after I submitted the test. It is C.

**chemistry**

what is the strongest intermolecular force in nitrogen trifluoride

**phy**

Which of the following is NOT true? evaporation occurs at any temperature of a liquid boiling takes place only at the surface of the liquid evaporation occurs only at the surface of a liquid boiling of a liquid takes place at a definite temperature and pressure

**phy**

Calculate the change in internal energy of 2kg of water at 90 degree celcius when it is changed to $3.30m^{3}$ of steam at $100 ^{o}$C. The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is $2.26\times10^{6}$ J/kg.

**Algebra 2 (DIVIDEPOLYNOMIALS)**

How do you divide this polynomial using long division? (6x^3-17x^2-104x-60) divide by (2x+5)

**Physics**

A mover pushes a 60 lb box 30 ft along a level floor at constant speed with a force directed 45 degrees below the horizontal. If the coefficient of kinetic friction is 0.20, how much work does the mover do on the box? ...Is this one of those trick questions where the work is 0?

**Business Math**

Ned’s Sheds purchases building materials from Timbertown Lumber for $3700 with terms of 4/10, 2/15, n/30. The invoice is dated October 17. a) List the time periods, as well as the payment and percent discount for each period. b) On November 1, a partial payment of $2000 ...

**social studies**

@helping Just to let you know, you spelt "grammar" wrong. You need a spelling teacher :)

**math**

067degree

**Math**

What is the combined height of 3 nickels, 2 nickles, and 1 nickle

**Math**

How many times larger is the area of a square (Length of Sides = A) than the area of an equilateral triangle (Length of Sides = 0.5A)?

**physics**

If a person weighs 700N on Earth, what force due to gravity would they exert on a 1500kg car they are standing 1.5m from? Assume the distance is between their centres of mass. F=Gm1xm2/r^2?

**Ap calc**

Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the x-axis. x + y = 3, x = 4 − (y − 1)^2

**AP calc**

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = 8x − x^2, y = 12; about x = 2

**AP calc**

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = 13 sqr.(x) y = 0, x = 1; about x = −3

**Science**

1.Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the frequency of radiation of wavelength 970 nm? Answer in units of s−1 . 2.Microwaves, such as those used for radar and to heat food in a microwave oven, have wavelengths greater than about ...

**math**

Use the line graph to solve. What was the difference in water levels between Week 2 and Week 4? A. 10 m B. 1 m C. 0.10 m D. 0.01 m the water kecvers is 5.3 and 5.4

**Science**

Use Emma's answers she's correct i'm telling you she's a life saver.

**Science**

JUST TOOK THE QUIZ GOT 100% 1.) True 2.) C 3.) A 4.) A

**Physics**

In the deep ocean, a water wave with wavelength 95 m travels at 12 m/s. Suppose a small boat is at the crest of this wave, 1.8m above the equilibrium position.What will be the vertical position of the boat 3.0s later?

**P.E**

Here are my answers for this mrs. Sue 1. a 2. a 3. d 4. b 5. b 6. b 7. a 8. c 9. a 10.d PLEAZE give me feedback asap!

**MATH 4TH GRADE**

3r6 =

**math**

divide

**economics**

Which of the following is most likely to be purchased in the factor market? You will choose two answers for this question. Shampoo and dog food Cement and copper wire Opera tickets and sushi Automobiles and deodorant Dirt and timber I know that dirt and timber is one of the ...

**math**

write the following square root in the form a root b . where a and b are integers and b has the least value possiable. 3 root 7?

**math**

find a value for x so that 28/12 = -7/x x=?

**math**

the number of professors in a collage is P and the number of students is S and there are 15 times as many students as professors. write the answer as an algerbra equation.

**Math (trigonometry)**

thank you

**Math (trigonometry)**

Hi, I need help with these problems, I'm not sure where to start. The book's examples are different. Thanks in advance!! 1.) To find the distance AB across a river, a distance BC of 472m is laid off on one side of the river. It is found that B=108.1 degrees and C= 17.9...

**Maths**

I did miss a bit. The 10 additional balls were all red.

**Maths**

In a bag there are a number of red and blue balls. The ratio of red to blue balls is 3:7. I add 10 balls and the ratio goes to 6:7 red to blue balls. How many blue balls are there? 3n + 7n = 10n (3n+10) + 7n = 10n + 10 6n + 7n = 10n + 10 13n = 10n + 10 3n = 10 N = 3.333 7n = ...

**Chemistry**

typo: *not be correct

**Chemistry**

Thank you DrBob222, could you possibly elaborate why C or D could be correct? (I initially thought C, but I'm not so sure now.)

**Chemistry**

Which of the following is NOT true for ΔGrxn? A.) If ΔG°rxn > 0, the reaction is spontaneous in the forward direction. B.) If Q = 1, then ΔGrxn = ΔG°rxn.If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction. C.) If ΔG&...

**math**

sales tax is 8.2 percent find the sales taxes on a purchase of 273.00.

**MATH!!!**

Aparent dies and leaves half of his estate to his four children. THE FIRST ONE GETS 1/2 OF THE ESTte the second gets 1/8 and the thrid one gets 1/4 . how much did the fourth on get?

**MATH!!!**

A function machince accepts inputs as ordered pairs. The componeys of the ordered pairs are natural numbers and the first componet is the length of the rectangle and the second componet is the width. the given machince comptes the perimeter ( the distance around the rectangle...

**MATH**

A function machine accepts inputs as ordered pairs. the componets of the ordered pairs are natural numbers and the first component is the length of rectangle and the second comonet is the width . the given machince comptes the perimiter . find the out ut for (3,7) (7,3) (5,7) ...

**math**

A function machine accepts inputs as ordered pairs. The Components of the order pairs are natural numbers and the first components is the length of the rectangle and the second componet is the width . The given machine computs the perimeter. Find the out put for (1,3) ...

**math**

F (X)= X-5

**Math**

Write an expression for the cost c if a printer charges $2.05 for binding plus 5 cents fee p pages for copies of a community group. C=

**algebra**

If matt has six times as many sitckers as tom. how many stickers dose he have to give tom so they can have 70 stickers each?

**Math**

Determine the next term of sequence 3,11,19,27,35 is my line of thinking correct 43?

**language / reading**

I'm doing a précis and I want to get a good grade could someone check this. C.s. Lewis's The Last Battle takes place in a forest it is a children's fantasy novel. The conflict is that a false ask an roams Narnia. The main characters at e Jill and Eustace the...

**language / reading**

I can't figure out what the climax of The Last Battle is? Is it this,the climax of The Last Battle is when Jill and Eustace go to the real Narnia.

**math**

I tried it and I think the answer is 82% am I right

**math**

Can't figure this one out. The oceans' tide levels vary based on the phases of the moon. Find the percent decrease in tide levels when high tide is 4.25 ft and low tide is 0.75 ft above sea level.

**math**

It is a different equation I have it now.

**math**

I don't get how to put it in the the equation Interest=percent×rate×time This is the question The banded ribbon worm is a carnivorous aquatic worm. It measures about 2.5 ft. When expanded. Find the percent increase between the contracted and expanded length of ...

**Language arts**

the Answer is B

**History**

Will do! It seems more accurate that way.Thanks again

**History**

Okay thank you for your help, I really appreciate it!

**History**

The question does not tell me anything else, but I do know that there are 6 features in a civilization. -GOVERNMENT -RELIGION -ARCHITECTURE -WRITING -SOCIAL STRUCTURE/CLASSES -CITITES

**History**

I'm not exactly sure, but I think it has something to do with civilizations of Ancient Egypt.

**History**

Explain the six features of Ancient Egypt

**1st grade**

Thank you

**1st grade**

This is for my cousin Kara planted seeds in her garden.that summer, many tomatoes grew. cause: Effect:

**math**

29

**math**

Explain Sean biked 43 miles on Monday, 23 miles on Tuesday, and 62 miles on Wednesday. How many more miles did he bike on Wednesday than on Monday? Draw a picture and write an equation to solve. Then solve

**science**

The total energy of motion in the molecules is called POTENTIAL ENERGY. TEMPERATURE is the average amount of energy of motion in the molecules of a substance. A THERMOMETER is a thin glass tube with a bulb on one end that contains a liquid,usually mercury or colored alcohol. ...

**Science**

I'm pretty sure it is c

**Science**

Yes

**Science**

The mRNA brings the message that was transcribed by the DNA to the ribosome, while the tRNA brings the anticodon to translate the message, along with the amino acid which bonds to form a polypeptide chain. The chain is further developed into a functional protein .

**Science**

the biochemical basis of heredity consisting of codons in DNA and RNA that determine the specific amino acid sequence in proteins and appear to be uniform for nearly all known forms of life. I'm not sure what the answer is but this is more information.

**Science**

The genetic code is the set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins (amino acid sequences) by living cells. Hope this helps.

**science**

I only want to know if I got them right or witch ones I got wrong.

**science**

Potential energy Temperature Thermometer Heat Conduction And convection

**science**

Ms sue HELP ME PLEASE

**science**

Help me.sue

**science**

The total energy of motion in the molecules of a substance is called? ?is the average amount of energy of motion in the molecules of a substance. A ? Is a thin glass tube with a bulb on one end that contains a liquid usually mercury or a colored alcohol. The energy transferred...

**Science**

How do you define a controlled experiment?

**Math**

0.28 t 0.62 = 0.90

**Math**

What is the sum of decimals? 0.28 + 0.62 = Write to explain how you found your answer.

**math**

13(s+12)

**social studies**

Well I think the same, about the walking distance, and I wondered if the took time to know its a civilised place to live! Can u please tell me if you agree!?!? - Emma:)

**Math Multiplication**

What are the factor pairs of 642? Please don't ask what I don't understand because I cant find the answer

**math**

How do you study for a math quiz?