Friday

July 31, 2015

July 31, 2015

Total # Posts: 443

**physics**

Compute the order of magnitude of the mass of (a) a bathtub filled with water, and (b) a bathtub filled with pennies. In your solution list the quantities you estimate and the value you estimate for each.
*September 20, 2010*

**Physics**

A solar still is used to make fresh water from salt water by evaporation. Assume that during a summer day that 1000 BTU/ft sq of solar energy falls on the surface of the salt water. Determine how many inches of water are evaporated in 30 days. Assume that 1040 BTUs is needed ...
*September 19, 2010*

**Physics**

A nuclear power plant generates (output) 500 mw. It is 34% efficient. The waste heat going in the Connecticut River with an average flow of 3*10 exp 4 (kg/sec). How much does the water temperature rise?
*September 19, 2010*

**Physics**

Can you do this for 3m/s^2?
*September 16, 2010*

**geometry**

Find the measure of each exterior angle of a reguler 11-gon. round your answer to two decimal places if neccesary?
*September 8, 2010*

**12th grade - Math**

1x1=1x10000+9+9+9=10027
*September 1, 2010*

**math**

what is the largest whole number x for which 2x is less than 13.7?
*August 26, 2010*

**12th grade-Advanced functions**

the y-intercept of the graph of y=k(x-1)(x-2)(x-3) is 24 Determine the value of k.
*July 30, 2010*

**12th grade-Advanced functions**

Given that f(x)=g(x/3), describe how the graph of f and g are related?
*July 30, 2010*

**12th grade-Advanced functions**

Determine the vertical asymptotes of the graph of graph of y=secx/logx for x≤2pi
*July 30, 2010*

**12th grade-Advanced functions**

provide any 2 solutions for the equation y=cot(1/2(theta-pi/2))-5 solutions may be in degrees
*July 19, 2010*

**Pre-Cal**

Yes it does. I will multiply cos60 which is 1/2 by 500 and add 4 feet. And I would use cos because it is adj/hyp. Is that a fairly good explanation?
*July 17, 2010*

**Pre-Cal**

A person flying a kite holds the string 4 feet above ground level. The string of the kite is taut and makes an angle of 60 degrees with the horizontal. Approximate the height of the kite above level ground if 500 feet of string is payed out.
*July 17, 2010*

**Chemistry**

SO one unit as well? I don't really get it.
*July 11, 2010*

**Chemistry**

I am having big troubles on this question. What is the increase in acidity associated with a decrease of one unit on the pH scale?
*July 11, 2010*

**trigonometry**

Find the length of the arc that subtends an angle of measure 70 degrees on a circle of diameter 15 centimeters.
*July 10, 2010*

**Stress Management Techniques**

THIS WAS A GREAT HELP. KEEP POSTING AND SHARING FOR OTHER SUBJECTS ON THE PERSONAL TRAINER PROGRAM FOR PF. its a life saver!
*July 3, 2010*

**maths**

you want to make a flower bed in your garden. What shape would it be to make the biggest possible peramiter for an area of 214cmsq
*June 16, 2010*

**English**

Write an essay explaining how epics reveal a civilization's customs, manners, and values. Support your ideas with at least three references from The Odyssey.
*June 8, 2010*

**3rd grade**

What can I write about the heart?
*May 29, 2010*

**Math**

Round 1,643,253 to the nearest hundred thousand. I say it's 1,600,000 but the workbook says 1,700,000. Please explain.
*May 21, 2010*

**math(answer quick!)**

closed or 2-d im a kid so idk hope this helps
*May 20, 2010*

**Chemistry**

I have to figure out which Atmospheric Pressure and Vapour Pressure pairs would cause boiling.
*May 17, 2010*

**Chemistry**

In which pair(s) would boiling occur? (Each pair corresponds to one row of the table) a. 760 {mm,Hg} 700 {mm, Hg} b. 480 {torr} 480 {mm, Hg} c. 1.20 {atm} 912 {mm, Hg} d. 1020{mm,Hg} 760 {mm, Hg} e. 740 {torr} 1.00 {atm}
*May 17, 2010*

**Chemistry **

Use molar volume to solve the following problems at STP. Find the volume mL occupied by 0.400 mole He. Find the number of grams of neon contained in 10.2 L Ne gas
*May 17, 2010*

**math**

Suppose a jar contains 5 red marbles and 33 blue marbles. If you reach in the jar and pull out 2 marbles at random without replacement, find the probability that both are red.
*April 22, 2010*

**physics**

A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a fundamental frequency of 74 Hz? Answer in units of m.
*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*

**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 dont 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*