# Posts by abby

Total # Posts: 1,125

**calculus**

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 9 cubic feet per minute. If the pool has radius 3 feet and height 11 feet, what is the rate of change of the height of the water in the pool when the depth of the...

*March 13, 2012*

**Math**

If you had 4 blue blocks in a bag, how many red blocks would you have to put in to pull out the red ones 1/2 of the time

*March 12, 2012*

**algebra**

a ladder is leaning up against a wall. The ladder is 8 feet long and is 3 feet away from the base of the wall. find the angle the ladder makes with the wall.

*March 11, 2012*

**Mechanics M1**

2.4

*March 7, 2012*

**Science-Space**

Compare Earth and the moon in terms of size and surface gravity.Explain please. What is the relationship between the moon's surface gravity, lack of an atmosphere, and temperature range? Explain please!

*March 6, 2012*

**calculus**

the anti derivative is (m/2)x^2 - 1/3(x)^3 so if you use the 2nd fundamental theorem of calculus using (mx - x^2) over the interval (0,m) and set that equal to 8 (the interval is 0 to m because the function with the larger area is mx) you should get m^3 / 8 = 8. Solve for m ...

*March 4, 2012*

**astronomy**

Why cant I see the answer to this question!!!!!!!!!!

*March 4, 2012*

**math**

The second place finisher in the canoe race lost to the winner by only 1/12 of the winner,s time. If the winning time was 3 1/5 minutes,by how many seconds did the runner up lose?

*February 27, 2012*

**Physics**

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat ...

*February 27, 2012*

**Physics**

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat ...

*February 27, 2012*

**Physics**

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for gaseous mercury, heat of...

*February 27, 2012*

**Physics**

Yay! I got the same answer, and I tried to figure it out before you answered. Good. That makes me happy. Thank you!

*February 27, 2012*

**Physics**

I literally have no idea what this means. Do I do both sides and divide one side? This is confusing.

*February 27, 2012*

**Physics**

What volume of aluminum would be needed to balance a 1.00 cm^3 sample of copper on a 2 pan laboratory balance?

*February 27, 2012*

**computer science**

Class scores: Write a program that calculates the total grade for N classroom exercises as a percentage. The user should input the value for N followed by each of the N scores and totals. Calculate the overall percentage (sum of the total points earned divided by the total ...

*February 23, 2012*

**physics**

What power - in Watt-hours - is needed at home on your standard 115 V circuit to run: (a) a 10 A air conditioner for one hour to completely cool off your room, or (b) a 3 A electric fan to keep a constant flow of air over you for five hours? (c) Which is more efficient for you...

*February 21, 2012*

**Math**

The home that you purchased in 2004 steadily increased in value for the first four years at the annual rate of 5.3%. Then, the home steadily decreased in value for the next three years at the annual rate of 3.4%. If you originally purchased the home for $160,000, what is its ...

*February 17, 2012*

**Physics**

a) What is the frequency of a photon of UV radiation ( = 2.00 x 10^-7 m)? When you input large numbers such as those in this problem, then input the numbers with parenthesis so as to obtain the correct answer. (b) Calculate the energy of a photon of UV radiation. When you ...

*February 9, 2012*

**Physics**

In black-and-white photography, a photon energy of about 4.00 x 10-19 J is needed to bring about the changes in the silver compounds used in the film. (a) What is the frequency of the light needed to bring about these changes? When you input large numbers such as those in this...

*February 9, 2012*

**Physics**

A monochromatic light source used in a diffraction experiment has a wavelength of 4.60 x 10- 7 m. (a) What is the frequency of this light? When you input large numbers such as those in this problem, then input the numbers with parenthesis so as to obtain the correct answer. (b...

*February 9, 2012*

**Math**

Write an inequality. Chondra made a $65 withdrawl from her savings account which now has a balance LESS THAN $500.

*February 8, 2012*

**7th grade science**

what do Net Force means?

*February 7, 2012*

**math**

what is A=____,b=8.1 mm,h=16mm

*February 6, 2012*

**math**

over 8 months,the value of Alana's investments dropped a total of $56. What integer value represents the average monthly change in the value of her investments?

*January 30, 2012*

**physics**

You are at a baseball game and the pticher throws a fast ball that accelerates to the batter at 50 m/s^2. Assume that the baseball has a mass of 0.15 kg. How much force (in Newtons) must the batter apply to the ball to lay down a perfect bunt that stops dead in front of home ...

*January 22, 2012*

**greek philosophy and history**

D

*January 21, 2012*

**physics**

An electric motor lifts an elevator 1.1 m in 13.0 s by exerting an upward force of 7.80 x 104 N. What power does the motor produce in kW?

*January 20, 2012*

**math**

True or false? Explain, all multiples of 3 are composite

*January 18, 2012*

**American Politics**

why is New Hampshire such a critical state in the presidential selection process?

*January 10, 2012*

**geometry**

Determine whether ABCD is a reactangle given each set of vertices. Justify your answer. 1. A(-3,1), B(-3,3), C(3,3), D(3,1)

*December 7, 2011*

**physics**

A home run is hit in such a way that the baseball just clears a wall 25.0 m high, located a distance 125 m from home plate. The ball is hit at an angle of 38.0° above the horizontal, and air resistance is negligible. (Assume the ball is hit at a height of 1.0 m above the ...

*December 6, 2011*

**math**

object is oblong measure's 16" round and tapers and is 21" round at wides whats the volume???

*December 4, 2011*

**Chemistry**

How would I make the VSEPR for potassium iodide (KI) I believe I made the right Lewis Structure, but am confused on what geometry a VSEPR structure would be. Thanks!

*November 30, 2011*

**Physics**

a) What will an object weigh on the Moon's surface if it weighs 500 N on Earth's surface? (b) How many Earth radii must this same object be from the center of Earth if it is to weigh the same as it does on the Moon? Alright, I know how to do part a. but I'm having ...

*November 27, 2011*

**statistics**

0.818

*November 11, 2011*

**early childhood education**

a teacher requests that a child use a small stepladder to reach a book on a shelf she is helping the child develop a)primitive reflexes b)movement qualities c)locomotor reflexes d)spatial awareness i put b which of the following is an example of a closed skill a)striking a ...

*November 6, 2011*

**math**

Well you forgot a part of the question so that doesnt help me at all

*November 3, 2011*

**early childhood education**

a childs ability to jump for distance is an example of a)agility b)flexibility c)explosive power d)reaction time i put b am i correct a child who has to struggle to climb into a chair is confronting an.......... hazard a)biological b)physical c)ergonomic d)environmental i put ...

*November 1, 2011*

**SOCIAL STUDIES**

Green Bay packers

*October 27, 2011*

**simplify**

simplify by removeing the factors of 1 7z-49/7z is the answer -7?

*October 27, 2011*

**U.S. History**

Gabriel Prosser’s rebellion was... a. a revolt by farmers in western Pennsylvania b. a revolt by enslaved people in Virginia c. a revolt by followers of Jefferson d.a revolt by citizens in Kentucky

*October 27, 2011*

**MATH HEPL**

lisa can shovel the drive way in 35 minutes john the same driveway in 45 how long will it a\take3e them together?

*October 27, 2011*

**Help**

lisa can shovel the drive way in 35 minutes john the same driveway in 45 how long will it a\take3e them together?

*October 27, 2011*

**Help**

Divide and simplify 6a+18/a-3 divide by a+3/a-4 I got 6a-24/a-3

*October 27, 2011*

**Math**

solve 6/y+4=5/y-4

*October 26, 2011*

**Math**

Determine whether the following statement makes sense or does not make sense, and explain your reasoning: When I'm trying to determine end behavior, it's the coefficient of the leading term of a polynomial function that I should inspect. A) This makes sense because the...

*October 23, 2011*

**math**

2160-500=1660 1660 divide by 20=83

*October 18, 2011*

**spelling??**

thank you Ms.Sue

*October 18, 2011*

**spelling??**

need a word with 5 letters, 3rd letter is a "g" the riddle is "amazing tricks that seem real"

*October 18, 2011*

**MATH (PLease HELp)**

i think the answer is 3 nickels .15 9 dimes .90 18 quarters 4.50 total 5.50

*October 18, 2011*

**physics**

Tangential velocity=radius of circle -:- angular speed=4-:-2=2m/s

*October 18, 2011*

**writting**

Thank you Ms. Sue and Writeacher.

*October 10, 2011*

**writting**

looking for help with apostrohe catastrophe in the following it is, use_________. if not,use_______ there is, use______. if not,use_______ who is, use________. if not, use______ they are, use______. if not, ____ or __ you are, use_______. if not, use_______ let us, use________...

*October 10, 2011*

**math**

1,500 and 1,800 There you go !!! Abby

*October 5, 2011*

**Math**

Find b such that (8x+1/b)-2=x has a solution set given by {3}. b =

*October 4, 2011*

**antonyms**

looking for antonym for "all" needs to be seven letters the 6th letter is an "n"

*October 1, 2011*

**physics**

Harry accidentally falls out of a helicopter that is traveling at 80 m/s. He plunges into a swimming pool 4 seconds later. Assuming no air resistance, what was the horizontal distance between Harry and the swimming pool when he fell from the helicopter?

*September 29, 2011*

**accounting**

Marks: 20 At the beginning of the fiscal year, ABC Clinic expected to treat 10,000 patients and estimated that it would incur $1,000,000 in overhead. At fiscal year end data indicated that the clinic only saw 9,000 patients and incurred overhead of $925,000.If the clinic used ...

*September 28, 2011*

**Fractions**

solve 9/10(3+8x)+3¡Ý15 How do you multiply the fraction?

*September 23, 2011*

**Geometry**

Two supplementary angles are in the ratio 7:11. Find the measure of the smaller angle.

*September 22, 2011*

**Science**

Why whales live in oceans?

*September 21, 2011*

**Science**

Ibook batteries last for 5 hours What is the independent and dependent variable? What is the control group?

*September 12, 2011*

**Physics**

Simpson drives his car with an average velocity of 45.1 km/h to the east. How long will it take him to drive 153 km on a straight highway? Answer in units of h

*September 8, 2011*

**math**

Help

*September 1, 2011*

**Language**

Thank you so much! May i ask what you do for a living?

*August 29, 2011*

**Language**

I think its , danced across the sky

*August 29, 2011*

**Language**

What is the predicate in the following sentences? The glowing stars danced across the sky. Camping is a lot of fun when you have a friend with you.

*August 29, 2011*

**math**

what is 8+10+2/12+4/9 in lowest term if possible

*July 30, 2011*

**Chemistry!**

A Galvanic cell runs on the following reaction: Co (s) + Cu2+ (aq) → Co2+ (aq) + Cu (s) Draw a diagram for this Galvanic cell, labeling the electron flow, the anode and cathode, and the positive and negative sides of the Galvanic cell.

*June 30, 2011*

**ANOTHER SCIENCE**

Consider the following reaction that has reached equilibrium: NH3 (aq) + C2H4O2 (aq) ! NH4+ (aq) + C2H3O2- (aq) ∆H = -102.1 kJ a. What will happen to the concentration of NH4+ (aq) if the temperature is raised? b. What will happen to the concentration of NH4+ (aq) if the...

*June 30, 2011*

**Science**

The following reaction: 2SO3 (g) ! 2SO2 (g) + O2 (g) has an equilibrium constant equal to 0.23 M. If the following concentrations are present: [SO2] =0.480 M, [O2] = 0.561 M, [SO3] = 0.220 M, is the reaction at equilibrium? If not, which way must it shift to reach equilibrium?

*June 30, 2011*

**Chemistry**

Write a balanced net ionic equation for the oxidation of metallic copper to Cu(II) ion by hot concentrated H2SO4, in which the sulfur is reduced to SO2

*June 29, 2011*

**Chemistry**

moles would be 118g divided by 342.3?

*June 29, 2011*

**chemistry**

0.5 M1V1=M2V2

*June 27, 2011*

**chemistry**

how many milliliters of hydrogen at 0 degree C and 1400 mmhg are produced if 15g of magnesium reacts with sulfuric acid?

*June 16, 2011*

**math**

0.00186 L of SO2

*May 25, 2011*

**Good Reads? 6th and 7th grade**

The 5th Wave If i stay Walk Two Moons

*May 24, 2011*

**Math**

M=1.05

*May 6, 2011*

**Math**

1.05

*May 6, 2011*

**Algebra**

Members of the Lake Shawnee club pay $40 per summer season plus $7.50 each time they rent a boat. Nonmembers pay $12.50 each time they rent a boat. How many times would both a member and a nonmember have to rent a boat in order to pay the same amount?

*May 6, 2011*

**creative writing**

Is there a personification example in the song: Did You Ever Know That You're My Hero

*May 5, 2011*

**Math**

Perform the following multiplication. Be sure answers are reduced to lowest terms. (Enter as an improper fraction.) 2 1/2 x 1 3/8 =

*May 3, 2011*

**Biology**

physical obstacles

*May 2, 2011*

**physics**

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to prevail for 5.0 s...

*April 8, 2011*

**Physics**

Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing...

*April 7, 2011*

**Physics**

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to prevail for 5.0 s...

*April 7, 2011*

**Physics**

it is π (pi)

*April 7, 2011*

**Physics**

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2 J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to prevail for 5.0 ...

*April 7, 2011*

**Physics**

Electrons in a beam incident on a crystal at an angle of 300 have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5A0, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing through ...

*April 5, 2011*

**Physics**

An air rifle is used to shoot 1.0 g particles at 100 m/s through a hole of diameter 2.0 mm. How far from the rifle must an observer be to see the beam spread by 1.0 cm because of the uncertainty principle? Compare this answer with the diameter of the universe ( 1026 m).

*April 5, 2011*

**Physics**

To what voltages must we accelerate electrons (as in an electron microscope, for example) if we wish to resolve; a) a virus of diameter 12 nm , b) an atom of 0.12 nm, c) a proton of diameter 1.2 fm?

*April 4, 2011*

**Physics**

Electrons in a beam incident on a crystal at an angle of 300 have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5A0, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing through ...

*April 3, 2011*

**math**

6x48,7x47,8x46,9x45,10x44,11x43,12x42

*March 30, 2011*

**Physics**

Two converging lenses with focal lengths 5 cm and 30 cm are placed 35 cm apart. Rays from a very distant object are impinged on the lens system parallel to the principal axis. What is the refractive power of the combination of these two lenses?

*March 26, 2011*

**Pre Calc**

Thanks so much guys!!!!

*March 23, 2011*

**Pre Calc**

tan(x)=5 sin(x) for interval -π < x < π A) 0, 1.571 B) -1.571, 0, 1.571 C) -1.369, 0, 1.369 D) 0, 1.369

*March 23, 2011*

**geometry**

A guy wire is attached to the top of a 75 meter tower & meets the ground at a 65 degree angle. How long is the wire?

*March 23, 2011*

**Math**

tan(x)=5 sin(x) for interval -π < x < π

*March 23, 2011*

**Physics**

A photon of energy E strikes an electron at rest undergoes pair production, producing a positive electron(positron) and an electron, photon+electron produce positron+electron+electron The two electrons and the positron move off with identical momenta in the direction of the ...

*March 22, 2011*

**Physics**

The temperature of your skin is approximately 35C degrees. What is the wavelength at which the peak occurs in the radiation emitted from your skin?

*March 22, 2011*