Wednesday

December 7, 2016
Total # Posts: 516

**Physics**

If the speed of sound in air is 340 m/s, what is approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 140 Hz? Answer in units of cm.

*April 1, 2010*

**Physics**

If the speed of sound in air is 340 m/s, what is approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 140 Hz? Answer in units of cm.

*April 1, 2010*

**chemistry**

Calculate the molar heat of neutralization in kJ/mol of the reaction between HA and BOH given the following information: The temperature change equals 7C, 50 mL of 1 M concentration of Acid 50 mL of 1 M concentration of Base Heat capacity of the calorimeter is 6.5 J/C. ...

*March 28, 2010*

**Math**

What this person means is : cosQ = 5 and tanQ = 2sqrt6

*March 23, 2010*

**College Chemistry**

I don't have an answer.

*March 21, 2010*

**Tennessee State University**

How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

*March 21, 2010*

**Tennessee State University**

How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

*March 21, 2010*

**Tennessee State University**

How much heat is absorbed by the calorimeter if the temperature change is 12 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

*March 21, 2010*

**physics**

Two 72.0 kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 125 degrees, what is their speed after the collision?

*March 19, 2010*

**precalculus**

an airplane flying at 550 miles per hour has a bearing of N 58(DEGREES)E. After flying 1.5 hours, how far north and how far east has the plane traveled from its point of departure?

*March 11, 2010*

**Statistics**

Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly appreciated

*February 3, 2010*

**science**

what is the biggest animal alive today

*February 2, 2010*

**Math - Trigonometry**

Math - Find the amplitude, period, phase shift - y=cosPi/2 (x+1/3)

*February 1, 2010*

**Math - Trigonometry**

Find the amplitude, period, and phase shift - y=cosð/2 (x+1/3)

*February 1, 2010*

**Science**

The basic units of heredity that determines traits are?

*January 21, 2010*

**Physics**

The block in lies on a horizontal frictionless surface and is attached to the free end of the spring, with a spring constant of 56 N/m. Initially, the spring is at its relaxed length and the block is stationary at x = 0 m. Then an applied force with a constant magnitude of 3.0...

*January 17, 2010*

**5th grade**

lightning is an example of electricity. what is another type of energy asociated with lightning

*January 13, 2010*

**Statistics**

D. It can be biased by one or two extremely small or large values. The advantage is that it takes every number into account. The disadvantage is that if you have a very large or very small number disproportionate to the rest then you calculations will be slightly off.

*December 17, 2009*

**English - Shakespeare**

I was wondering if you could help me find literary devices in this passage in "Much Ado about Nothing" by Shakespeare: BENEDICK That I neither feel how she should be loved nor know how she should be worthy, is the opinion that fire cannot melt out of me: I will die ...

*December 16, 2009*

**English**

I was wondering if you could help me find literary devices in this passage in "Othello" by Shakespeare: Desdemona: "My noble father, I do perceive here a divided duty: To you I am bound for life and education; My life and education both do learn me How to ...

*December 4, 2009*

**Calc**

An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 3 km east of the refinery. The cost of laying pipe is $300,000 per km over land to a ...

*November 30, 2009*

**Calc**

The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity is P a maximum?

*November 30, 2009*

**geography**

i have to make a collage of four towns in britain help !!!!

*October 24, 2009*

**Chemistry**

Find moles first: That is M x L = 0.20 x 0.500L = ? Then convert from moles to grams with moles/molar mass. You want to use the molar mass of NiSO4.6H2O: 0.10 mol x 262.84 g/mol = 26.28 g of NiSO4.6H2O

*October 20, 2009*

**math statistics**

The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The Cincinnati Enquirer, January 21, 2006). Use this price as the population mean, and assume the population standard deviation is $.20. 1. What is the probability that ...

*October 19, 2009*

**statistics math**

The unemployment rate is 5.8% (Bureau of Labor Statistics, April 3, 2003). Suppose that 100 employable people are selected randomly. 1)What is the probability that exactly six people are unemployed (to 4 decimals)? 2)What is the probability that exactly six people are ...

*October 18, 2009*

**math**

any can help me please?

*September 22, 2009*

**math**

can anyone show me how to work this problem out thanks in advance The Census Bureau provides data on the number of young adults, ages 18–24, who are living in their parents' home (the data include single young adults who are living in college dormitories because it is...

*September 22, 2009*

**math statistics/probability**

can anyone show me how to work this problem out thanks in advance The Census Bureau provides data on the number of young adults, ages 18–24, who are living in their parents' home (the data include single young adults who are living in college dormitories because it is...

*September 22, 2009*

**math**

Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ...

*September 22, 2009*

**math**

Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ...

*September 22, 2009*

**college math statistics**

Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ...

*September 22, 2009*

**math statistics/probability**

Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ...

*September 22, 2009*

**Science**

I'm not an expert nor a teacher but I'm a college student and I think the answers are 1. procedure 2. error

*September 22, 2009*

**math statistics**

Hello I am having trouble trying to figure out how to do this probability word problem: In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady gains. The ...

*September 22, 2009*

**Technology**

I need help with my entry essay, "The Twentieth Century brought an explosion of discoveries and inventions in math, science, and technology. Choose one such discovery or invention, identify it, and name the people responsible. Then explain how this discovery or invention ...

*September 19, 2009*

**1st. grade**

well wut about tvs

*September 17, 2009*

**Math**

i don't really no actually

*September 17, 2009*

**Math**

that still does not explain how 2 simplify it

*September 17, 2009*

**Math**

wuts the simple form the expression 8x-2+5-5x-2+3? i hav been stuck on this question 4 a very long time and need some help

*September 17, 2009*

**Citizenship**

How is Fair-trade a citizenship activity? Is it active?

*September 8, 2009*

**physics**

An ostrich can run at speeds of up to 72 km/h. How long will it take an ostrich to run 1.5 km at this top speed?

*September 7, 2009*

**physics**

An ostrich can run at speeds of up to 72 km/h. How long will it take an ostrich to run 1.5 km at this top speed?

*September 7, 2009*

**math**

Express 2,750,389 in scientific notation

*August 22, 2009*

**7th grade**

can anyone help me with this question? (3y-2x)2 don't take the 2 a times 2. does anyone no the answer.

*June 10, 2009*

**spanish**

no problem

*June 10, 2009*

**spanish**

yeah i no

*June 10, 2009*

**spanish**

well don't u see that the question is saying to ask for something if u look carefully

*June 10, 2009*

**spanish**

i would think c would be the correct answer

*June 10, 2009*

**spanish**

are u sure about the answer 'cause im pretty sure it is incorrect

*June 10, 2009*

**7th grade math**

oh yeah sorry about that student was me until i changed the name.

*June 10, 2009*

**7th grade math**

what did u get as an answer?

*June 10, 2009*

**7th grade math**

Does anyone no what to do with this equation..... here it is..... 5x x 18.75=93.75 do u divide or do i multiply to get my answer.

*June 10, 2009*

**Math**

yeah ... thanks

*June 10, 2009*

**heroes**

the anwser to that would be DC(not the skateboarding company or washington dc)

*June 10, 2009*

**Geometry**

oh... wow, thx.

*June 3, 2009*

**Geometry**

E is the contact point. F and C are on the circle and 180 degrees from each other. Angle D is EDF. finally, I need the angle measure of Arc EF

*June 3, 2009*

**Geometry**

I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I have labeled the ...

*June 3, 2009*

**Geometry**

I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I have labeled the ...

*June 3, 2009*

**Geometry**

I have a circle with 2 lines that are connected and tangent to the circle. The lines are CA and CB angle ACB is 50 degrees. Arc AB inside of the tangent lines is X degrees find X

*June 3, 2009*

**science**

what is the chemical equation for electrolysis

*May 31, 2009*

**Question**

I'm from Tabetha's class, and wanted to look at her Jiskha message, but that didn't help. I tried searching for this, but it's too specific to find in a google search. Its something that requires a real, live human. Thanks for your understanding.

*May 18, 2009*

**Algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx +c = 0 The solution is 6 only solution.

*May 5, 2009*

**Physics**

This is a basic question on motion. I must choose a procedure to test sideward motion and have no clue where to start. I am in 2nd grade so this test needs to be relatively simple. Thanks!

*April 20, 2009*

**Ms. Office**

Why are you wasting forums for garbage?

*April 6, 2009*

**Physics**

a = Δv/Δt = (vfinal - vinitial) / (tfinal - tinitial)

*April 5, 2009*

**English**

Rules of writing an essay?, And what are the main factors of an essay?, How to properly write an essay without an errors?

*April 4, 2009*

**Math**

f(x)= x2 (2=squared, how to graph this? how to solve this? f(x)= 3x-3 g(x)= 2x-5 f(4)=? f(5)=? g(3)=? g(4)=?

*April 4, 2009*

**Trig/Math**

To find an angle where you have the opposite and adjacent which formula do you use? Sine, Cosine, Tan? and how do you find the inverse?

*April 4, 2009*

**Physics**

wow, that was more elaborate than I thought it would be. Thank you so much for answering my qustion. :]

*March 1, 2009*

**Physics - please help I don't get it**

please I really need help with this

*March 1, 2009*

**Physics**

A daredevil attempts to swing from the roof of a 24m high bulding to the bottom of an identical building using a 24m rope. He starts from rest with the rope horizontal, but the rope will break if the tension force in it is twice the weight of the daredevil. How high is the ...

*March 1, 2009*

**6th grade_Science/Math**

ha ha ha funny josh

*January 27, 2009*

**Calculus**

Oh sorry, that was supposed to be pi

*December 19, 2008*

**Calculus**

Let f be the function given by f(t) = 2ðt + sin(2ðt) a) Find the value of t in the open interval (0,20 for which the line tangent at (t, f(t)) is parallel to the line through (0,0) and (2,4ð) b) Suppose the given function describes the position of a particle on the...

*December 19, 2008*

**Accounting**

buying packaging material, hiring shipping companies (those are a few of the costs)

*December 19, 2008*

**4th grade**

what is computation method?

*November 25, 2008*

**Math - gr.11**

Cos 30 = A/H Cos30 = A/5 *switch A and Cos30* A=5(Cos30) A=5•sqrt of 3 ------------- 2 *Remember, Cos30 is equal to A/H which is sqrt3/5

*November 20, 2008*

**8th grade science**

explain that gravitational force is the dominant force determining motions in the solar system and in particular keeps the planets in orbit around the sun

*November 18, 2008*

**8th grade**

In chemistry what is the practical applicaiton of scientific principles to solve everyday problems?

*November 17, 2008*

**4th grade**

what are 10 (things (living and non-living things)that a barracuda need to live a healthy life?

*November 11, 2008*

**science**

barracuddas are so able to to conform to their environment So i don't know how to answer the question. they need water food parisites and that's all i can get and i need 10 things.

*November 11, 2008*

**science**

barracuddas are so able to to conform to their environment So i don't know how to answer the question. they need water food parisites and that's all i can get and i need 10 things.

*November 11, 2008*

**science**

what are 10 (things (living and non-living things)that a barracuda need to live a healthy life?

*November 11, 2008*

**Organic Chemistry**

to bobpursley, the question you ask in response is irrelevant. that is only in the case of SN!. the original question refers to SN2.

*November 2, 2008*

**Earth Science**

i have a few questions 1)what california geologic features formed as the result of erosion by glaciers? 2)which geologic processes formed most of californias nonmetallic mineral resources? 3)an oil well is usually drilled into? 4)which of the following is NOT likely to be used...

*October 30, 2008*

**Algebra II**

I've been working on this one and I just can't figure it out. I appreciate all the help: Two miles upstream from his starting point, a canoeist passed a log floating in the river's current. After paddling upstream for one more hour, he paddled back and reached his ...

*October 29, 2008*

**Life Science**

I cant find the common names for these two words: protista and fungi - Can you help me?

*October 28, 2008*

**Math**

Number sense: What number is 10.000 less than 337.676 ?

*August 28, 2008*

**science**

a substance that keeps its shape because its particles can't flow freely is a(n).........

*August 28, 2008*

**MATH**

Matt and Anna are frequent fliers on Fast n Go Airplanes. They often fly between two cities that are a distance of 1680 miles apart. On one particular trip, they flew into the wind and the trip took 4 hours. the return trip with the wind behind them, only took about 3 hours. ...

*May 27, 2008*

**math**

Matt and Anna are frequent fliers on Fast n Go Airplanes. They often fly between two cities that are a distance of 1680 miles apart. On one particular trip, they flew into the wind and the trip took 4 hours. the return trip with the wind behind them, only took about 3 hours. ...

*May 27, 2008*

**math**

A man drives x miles the first day, y miles the second day, and z miles the third day. The average mileage covered per day is

*April 1, 2008*

**math**

why do dragons sleep during the day

*March 17, 2008*

**math**

whats 5+5

*February 7, 2008*

**English/Language Arts**

In Tom Godwin's Cold Equations (short story), what writing style does he use?

*February 3, 2008*

**statistics**

thanks- it helped me understand my homework.

*December 13, 2007*

**english**

how did prince dracula become famous hundreds of years after he died

*December 12, 2007*

**english**

how did the soldiers try to keep enemies away from bran castle?

*December 12, 2007*