Monday

May 30, 2016
Total # Posts: 280

**Chemistry**

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.7×10^{15} Hz?
*September 27, 2011*

**Physics**

A horizontal spring attached to a wall has a force constant of 780 N/m. A block of mass 1.70 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in the figure below. The initial goal of this problem is to find the velocity at the ...
*September 27, 2011*

**Chemistry**

In the recent Chem Activities, we have been learning about how Coulombic attractions and repulsions determine properties of atoms like ionization energy and atomic radius. We have made two assumptions not completely justified by the data we had up to this point: electrons are ...
*September 26, 2011*

**Math**

A ten-pin bowling ball has a volume of about 5274 cm3. A candlepin (8) bowling ball has a volume of about 48 in3. About how much greater is the volume of a ten-pin bowling ball than the volume of a candlepin bowling ball?
*September 25, 2011*

**Math**

Tonia deposited a total of $174.52 into her checking account. She also withdrew a total of $186.15. Use addition to find the net change in Tonia’s checking account.
*September 25, 2011*

**Chemistry**

What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?
*September 22, 2011*

**Chemistry**

What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?
*September 22, 2011*

**geometry**

AB=5x+2 AC=3x+17
*September 20, 2011*

**Chemistry**

Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a comma. Zeff Cl-, Zeff K+
*September 17, 2011*

**Math 10**

A cylinder has a surface area of 250cm2. The height is twice as big as the radius. What is the height of the cylinder?
*July 9, 2011*

**Science**

thanks but that website was absolutely no help.
*June 25, 2011*

**Science**

Name the TWO variables in the following hypothesis... Homeless women are subjected to more spousal abuse than are housed women.
*June 25, 2011*

**American History**

This is what my teacher wrote up on the board today and i was needing some help with it i don't really understand it all... This is exactly what he wrote: In a page-long essay describe how we got Texas Include: Stephen Austin, Zachary Taylor, Manifest destiny, Santa Anna, ...
*April 14, 2011*

**American History**

This is what my teacher wrote up on the board today and i was needing some help with it i don't really understand it all... This is exactly what he wrote: In a page-long essay describe how we got Texas Include: Stephen Austin, Zachary Taylor, Manifest destiny, Santa Anna, ...
*April 14, 2011*

**Statistical Psychology**

A social psychologist was interested in how communication patterns can affect creative problem solving in small groups. seven groups of each of two types were formed: vertical and horizontal. In the vertical groups, participants were organized hierarchically, so that they ...
*April 13, 2011*

**algebra**

what is the formula to find the heigh of a trapazoid?
*April 11, 2011*

**Math 7th**

In order to be allowed to go on a does trip, 80% of the students in a class must pads a pop quiz. If there are 26 students in the class. Approximately how many must pass the quiz?
*April 7, 2011*

**Math 7th**

In order to be allowed to go on a does trip, 80% of the students in a class must pads a pop quiz. If there are 26 students in the class. Approximately how many must pass the quiz?
*April 7, 2011*

**math**

cesar bought 2 bags of flower that each weighed a kilogram and another bag that weighed 500 grams.how many grams of flower did he buy?
*April 7, 2011*

**polygons**

aerlintg
*April 6, 2011*

**polygons**

can you help me unscramble this word loav
*April 6, 2011*

**musicbbnchkuytdbnt**

dmygxi
*April 6, 2011*

**Chemistry**

sodium acetate
*March 22, 2011*

**chemistry**

300.0 g of ammonia react with 36.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete?
*March 16, 2011*

**mathematicas**

how do i do my homework quickly like a ninja but thoroughly??
*March 14, 2011*

**Physics**

I just need ideas on how i can estimate the height of a building by using only a tennis ball and a stop watch. I can only measure it by being on the ground level.
*February 27, 2011*

**Math**

how would you answer this?
*February 11, 2011*

**Math**

Your friend is taking an algebra class that began after ours. Write your friend an email explaining a general strategy for factoring in a very organized way.
*February 11, 2011*

**Earth and Physical Science**

A 901 kg car is traveling north down a country road when a deer crosses in front of the car. By slamming on the breaks, the care is able to decelerate at 4.0 meters per second squared. What is the frictional force between the street and the car?
*February 7, 2011*

**biology**

how to identify leaves marple.lime,willow,hawthorn rose,rhododendron,birch ivy.oak.sycamore,horse chesnut,holly to make a branch key then turn it into paired statement key
*February 7, 2011*

**Math**

5-s(4-7)+3s 5-s(-3)+3s 5+3s+3s 5+6s
*January 30, 2011*

**physics**

A box sits at rest at the top of a ramp of length 1.79 m and elevation angle 38.0deg. The box accelerates down the ramp, and when it reaches the bottom its velocity is 4.05 m/s. What is the coefficient of friction μ on the ramp?
*January 30, 2011*

**math**

how do you get 24 by using numbers 1-12 by going up,down,and diagonal
*January 27, 2011*

**Gym**

how do you get 24 by using numbers 1-12 by going up,down,and diagonal and by using addition
*January 27, 2011*

**CHEM 1LB**

well C is the wrong answer. Another 3 points i have to make up on the piratical D:
*January 21, 2011*

**CHEM 1LB**

E is right
*January 21, 2011*

**Chemistry**

bdegjm is right
*January 15, 2011*

**Reaction Descriptions**

abd, bf, cf, cd, ae, ae is correct
*January 12, 2011*

**Physics**

Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a slight nudge to get it ...
*January 1, 2011*

**Math**

A tree casts a shadow 10 feet long. A 6-ft. man casts a shadow 4 ft. long. The triangle formed by the tree and its shadow is similar to the triangle formed by the man and his shadow. How tall is the tree?
*December 2, 2010*

**Life Science**

two organisms were found to have different genotypes but the same phenotype. Predict what these phenotypes might be? and Explain
*November 17, 2010*

**Math**

Marcia developed a roll of film and received 4-inch by 6-inch prints. She wants to have one picture enlarged to an 8-inch by 12-inch print. What kind of transformation is this? What is the scale factor?
*November 3, 2010*

**Math**

o, duh.. thanks you both of you
*November 3, 2010*

**Math**

Express 3/11 as a decimal number. do u go 3 divide by 11 or 11 divide by 3 ?? so it would be 0.27 repeated or 3.6 repeated ??
*November 3, 2010*

**math**

1-1-7-7 2-2-6-6 3-3-5-5 4-4-4-4 still think also hope it helps
*November 3, 2010*

**Math**

thank you Ms. Sue
*November 3, 2010*

**Math**

Please help me solve this.. It costs $10 plus $8 per hour to rent a canoe. Brandon and Erin have $50. Solve the following equation to find how many hours they can rent a canoe. 8h +10 = 50
*November 3, 2010*

**math**

there will be 16 bacteria. you take 2 time 4 to find out how many bacteria in one then 2 times 4 is 8 so 8 times 2.. equals 16
*November 3, 2010*

**5th grade**

Math. How can I make up a data set of at least 12 numbers that have the following landmarks, maximum 18: mode: 7, range: 13, median: 12?
*October 14, 2010*

**college physics**

Consider two vectors A = 4i - 4j and B = -i - 8j . (a) Calculate A + B. (b) Calculate A - B. (c) Calculate absolute value(A + B). (d) Calculate absolute value(A - B). (e) What is the direction of A + B? (from the +x axis) (f) What is the direction of A - B? (from the +x axis)
*September 28, 2010*

**college physics**

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 140 cm and makes an angle of 130° with the positive x axis. The resultant displacement has a magnitude of 144 cm and is directed at an angle of 30.0° to the positive...
*September 28, 2010*

**college physics question corrected**

Given the vectors A = 2.00i + 8.00j and B = 4.00i - 5.00j, do the following. (a) Draw the vector sum C= A+ B and the vector difference D= A- B. (b) Calculate C and D, first in terms of unit vectors. Calculate C and D in terms of polar coordinates, with angles measured with ...
*September 28, 2010*

**college physics**

Given the vectors = 2.00 + 8.00 and = 4.00 - 5.00, do the following. (a) Draw the vector sum = + and the vector difference = - . (Do this on paper. Your instructor may ask you to turn the paper in.) (b) Calculate and , first in terms of unit vectors. Calculate and in terms of ...
*September 28, 2010*

**ela**

Thank you Bobpursley from Caitlin
*September 26, 2010*

**ela**

Below the main level, we have a large playroom. What part of speech is below?
*September 26, 2010*

**physics**

A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s^2. If the brakes are applied for 3.0 seconds, how fast is the car going at the end of the braking period...
*September 19, 2010*

**Government**

I need helo understanding what will likley pass a bill and what wont likley make a bill pass
*July 12, 2010*

**math**

40,300 , thank you(:
*June 15, 2010*

**math**

About 310 000 t of Alantic cod were caught in 1991. In 2001, the mass of cod caught was 87 percent less. How much cod was caught in 2001 ? and how do you find the answer?
*June 15, 2010*

**MATH-HELP ASAP**

thank you !!
*June 15, 2010*

**MATH-HELP ASAP**

Joline collects hockey cards. She needs 5 cards to complete a set. This is 20 percent of the set. How many cards are in the set? and how do you figure this out ? please help:(
*June 15, 2010*

**physics**

how do I calculate mass of one object in an elastic collision? I have the equation m1v1 initial + m2v2 initial = m1v1 final + m2v2 final How do I rearrange this to solve for m2?
*June 15, 2010*

**Biology 11 U**

In the U.S. 1 out of 10 000 babies is born with phenylketonuria (PKU). The disease is caused by a recessive allele. The frequency of individuals in the U.S. population born with PKU corresponds to q squared. What is the given information? (e.g. p squared = 99999/10000)
*June 9, 2010*

**Religion**

How does Jesus' ministry reflect a particular emphasis on the Temple in Jerusalem as the center of Jesus' life? (in the Gospel of Luke)
*May 22, 2010*

**history- HELP!**

there are ten provinces in canada but on seven in 1873. wHICH PROVINCED DID NOT EXIST IN 1873?
*May 9, 2010*

**Math**

becca repost it, nobody will answer
*April 19, 2010*

**chemistry**

to clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 ml of solution what are the pH and pOH values for the solution?
*April 18, 2010*

**math**

How do I do 5 1/3 * 3/8
*April 3, 2010*

**Maths**

Solve step by step 4sin^2x = 3cos^2x
*March 1, 2010*

**Math**

I think the expression is 2x + 3y and it would equal 27.54 if x = 0.59, y = 8
*February 24, 2010*

**math**

thank you soo muchh! (:
*January 31, 2010*

**math**

explain what each equation represents. 1) 5e+1=15
*January 31, 2010*

**Religion**

Thank you so much!
*January 18, 2010*

**Religion**

What is the influence of Gnosticism in the text John 1:1-1:18?
*January 18, 2010*

**Religion**

Okay,thank you very much!
*January 18, 2010*

**Religion**

actually John 1:1-1:18, sorry I forgot to put that. And for the question, i meant "where is it making...: not "what..." sorry
*January 18, 2010*

**Religion**

What bold statement does the gospel of John say that the other gospels don't?
*January 18, 2010*

**chem1lbuci**

I got nf=1, lyman. But the problem is unlimited, so it doesn't matter with all of the bs answers here anyways.
*January 15, 2010*

**4th grade math**

I don't know how to go about solving this problem: There were 93 students going to camp. After equal groups of fewer than 10 students were formed for hiking. 2 students were left over . How many equal groups were formed? Thanks!
*January 7, 2010*

**tests**

thank you!
*December 20, 2009*

**tests**

I need help narrowing down answers in regents style exams. can you help me?
*December 20, 2009*

**biology**

Yes, i also ment for example, if there was a,b,c,d, i narrowed it down to a and c. thanks. And may i please have the regents links? thank you so much!
*December 20, 2009*

**biology**

What is the best way to narrow down questions in a regents style exam? I can't seem to figure it out and need some help. Thank you.
*December 20, 2009*

**math**

Plz tell me the answer i have been doing this for hours
*December 11, 2009*

**Chemistry**

Formic acid, HCO2H, is a weak acid. Write a net ionic equation for the reaction of formic acid and aqueous potassium hydroxide.
*October 14, 2009*

**Math-Algebra**

I am a tutor for a student working on the same thing so I somewhat know this material. (the book is Introductory and Intermediate Algebra for College Students, by the way) Unfortunately I don't have the book, so I am using my general knowledge and the girl I tutor sent me ...
*October 14, 2009*

**math**

The answer is- you mom! OOOOOOHHHHH!!!!
*September 22, 2009*

**biology**

What is the heterotrophic hypothesis and how can I explain it from both a biological and conceptual framework?
*September 2, 2009*

**language arts**

slebsurs prustos
*May 29, 2009*

**Calculus**

Here is my problem that I am trying to work on: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground...
*May 11, 2009*

**Calculus**

well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground? ...
*May 11, 2009*

**Calculus**

well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to reach the ground? ...
*May 10, 2009*

**Calculus**

How to integrate with position, velocity and accelleration
*May 10, 2009*

**4th grade math**

133devided by14
*February 26, 2009*

**chem**

when i did the quadratic equation, i ended up with a negitive number under the radical. and you cant slove from then?
*February 15, 2009*

**6th grade**

Thank you!!!!
*December 29, 2008*

**6th grade**

Which schools were involved the court case Goss v. Lopez?
*December 29, 2008*

**author**

thank you!
*October 26, 2008*

**author**

Does anyone know Gertrude stein's theme in her literature and how does it connect to the theme of the lost generation and the sun also rises.
*October 26, 2008*

**biology**

hi Exercise makes your heart pump faster increasing your heart rate. is there a chemical reaction for it thanks
*October 19, 2008*