Wednesday

January 28, 2015

January 28, 2015

Total # Posts: 95

**Physics**

A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him
*October 30, 2014*

**math**

A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?
*June 25, 2013*

**government**

3rd amendment?
*March 27, 2013*

**math**

a movng company wants to buy a new type of truck and needs to know the volume of the storage compartent before they can decide if they should purchase the truck. What is the volume of the storage compartment? 10ft, 18ft, 8ft, 2ft, 15ft.
*December 27, 2012*

**Physics**

A spring with a spring constant k=450.0 N/m is attached to a mass of m=8 kg and stretched -0.5 m from its equilibrium position and released. What is the speed of the block when it is at the equilibrium position?
*October 24, 2012*

**math**

help! what ia 1/4(sin4x)? just to jump start this proof
*May 21, 2012*

**AP Chemistry--to DrBob**

Thanks Dr. Bob!
*April 9, 2012*

**AP Chemistry--to DrBob**

How do I figure out the Pka value?
*April 9, 2012*

**AP Chemistry**

DrBob--How do I determine the Pka value?
*April 9, 2012*

**AP Chemistry**

Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)
*April 9, 2012*

**Chem!!!:/**

Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.
*March 12, 2012*

**Chemistry**

Your answer is correct.
*February 1, 2012*

**PRECALCULUS**

solve: tantheta = sintheta
*January 23, 2012*

**psychology**

1.Who came up with the psychosexual stages? *Sigmund Freud Skinner Gardner Lada Gaga 2.Which psychologist tested classical conditioning with dogs? B. F. Skinner *Ivan Pavlov Igor Pavlov Sigmund Freud 3. Explain the difference between operant conditioning and classical ...
*January 22, 2012*

**physics**

what is nature of a graph of period against angle
*November 24, 2011*

**Chemistry**

Samples of three different compounds were analyzed and the masses of each element were determined. Compound Mass Mass N(g) O(g) A 5.6 3.2 B 3.5 8.0 C 1.4 4.0 If you were John Dalton and had never heard of a mole, which of the following would you think were possible sets of ...
*August 29, 2011*

**SCIENCE!!!!!!!!!!!!!!111111**

A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
*August 29, 2011*

**chemistry**

Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add the moles of both ...
*August 29, 2011*

**science**

1meter=1X10^-9 nanometers 1meter=1X10^-6 micrometers 1meter=1X10^-10 Angstrom 1meter=1X10^6 MegaMeter
*August 29, 2011*

**math **

third one is true
*August 29, 2011*

**Algebra**

As time passes, the ticket sales get higher. Each time you plug in different values of X, the day tickets go on sale, your Y value increases.
*August 29, 2011*

**Algebra**

For D)..... Your parabola should be negative because of the -2X^2. SO the parabola when you graph it is a backwards U. The middle of the backwards "U" has a high maximum so your tickets should be at a peak during the middle of the sale.
*August 29, 2011*

**algebra**

I believe you get .0030864. solve what's in the parenthesis first then ^2. turn fractions into decimal format then add them and ^2.
*August 29, 2011*

**Trig**

Find the angle of the measure formed by the clock. 2:15
*August 29, 2011*

**basic chem**

1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?
*August 28, 2011*

**Chem**

oh okay i get it now, thank you! Why did you subtract 1.00 from the abundance though? how do you know?
*August 28, 2011*

**Chem**

(79.904)=(80.9163)(0.4931) + x(0.4931) 79.904=39.90 + 0.4931x 40.004=0.4931x x=81.13amu
*August 28, 2011*

**Chem**

My teacher said the answer is 78.92 amu and 50.69%. But i keep getting 81.13amu and i don't know how to get the percentage.
*August 28, 2011*

**Chem**

Bromine has two natural occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. The mass of Br-81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br-79.
*August 28, 2011*

**algebra**

Oh and then you put your equation in slope intercept form y=mx+b. and get -7y=-6x-42 and divide by 7. so your line will be y=6/7x +6.
*August 28, 2011*

**algebra**

you plug in zero for x and get 6(0)-7y=-42 and then you get-7y=-42 which is y=6. and then you plug in zero for y and get 6x-7(0)=-42 and then you get 6x=-42 which is x=-7. so your points are (-7,6) and then graph them.
*August 28, 2011*

**trig**

5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?
*August 28, 2011*

**math**

That's not possible. But 10^-1 is. You move your decimal to the left for negative exponents and you move your decimal to the right for positive exponents. If you had a value of 1 X 10^-2 for example you would move your decimal two places to the left which would equal .01 ...
*August 28, 2011*

**trig**

oh okay! I get it now, thanks!:)
*August 28, 2011*

**trig**

How do you know by looking at them?
*August 28, 2011*

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)
*August 28, 2011*

**Chemistry**

You would use gay-lussac's law. P1/P1 = P2/P2 SO you plug your values in and get... (660 torr)/(20celsius) = (? torr)/(40celsius) .... (26400 torr/celsius) = (20celsius)(? torr) then divide by 20 degrees celsius and then you get 1320 torr as your answer.
*August 28, 2011*

**Chemistry**

THE VOLUME WOULDN'T HAVE ANY EFFECT ON THE TEMPERATURE. FOR A GAS IN A CLOSED CONTAINER, WITH THE PRESSURE CONSTANT THE TEMPERATURE DOESN'T CHANGE THE VOLUME. WHEN TEMPERATURE INCREASES, PRESSURE INCREASES. THEY ARE DIRECTLY PROPORTIONAL.
*August 28, 2011*

**trig**

Use the appropriate identity to find tan(theta) given that cot theta =0.05.
*August 26, 2011*

**trig**

Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.
*August 26, 2011*

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)
*August 26, 2011*

**Physical Science**

addition&subtraction= round to least number of decimal places multiplication&division=round to least number of significant figures present.
*August 26, 2011*

**science**

use conversion factor. 3.5in X 1cm _____ = 1.4 cm 2.54 in. round to two significant figures. answer is= 1.4cm
*August 25, 2011*

**english **

Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in ...
*May 21, 2011*

**english**

John gave Samuel his hockey stick. In this sentence, Samuel is the ____.
*May 19, 2011*

**english**

What is the compound subject of the following? Tamara and Janet served soup and salad at the luncheon.
*May 19, 2011*

**english**

Which of the following pronouns shows possession? they - them - her - its
*May 18, 2011*

**english**

What is the subject of the following sentence? Please help me figure this out! a. Please b. help c. me d. You (implied)
*May 18, 2011*

**english**

Identify the indirect object in the following sentence: Fernando read Miguel a bedtime story.
*May 18, 2011*

**math**

(-4)(5)=
*April 2, 2011*

**math**

-2-6
*April 2, 2011*

**math**

2+3x+4 input x=3 and output y=6
*January 31, 2011*

**math**

Can some one please help me I had developed jello brain today. Can some one explain to me why the line x = - 2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = -2 . what would the slope be for y = -2. Please I am sinking here.
*October 25, 2010*

**math**

I need to see if i worked this problem right. -8 - -7 =-15 -8+-7=-15 do i add this together aredo i subtract and get -1
*September 28, 2010*

**math**

Can any one help me with this problem am having trouble with coming up with the answer. 7-(-1)/3(2)-9/(-3)
*September 28, 2010*

**math**

can I trouble any one with this que stion. I got jello brain right now. 7-(-1)/3(2)-9/(-3)
*September 27, 2010*

**math**

(-8)2 – 8(2 )= I need help with this problem i have wrecked my brain and havnt came up with the answer
*September 27, 2010*

**math**

The ã61 (square root of 61) is between what two whole numbers?I am a little bit losed when coming up with the answer can I trouble you for some help.
*September 27, 2010*

**math**

I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She then drove to the beach which took her 4 hours and 25 minutes. It only took Amanda 5 hours and ...
*September 27, 2010*

**math **

find the median and mean of this numbers 95,75,86,96,70,68,76,81,95,76,69,83,93,88,94 Is the median 83and the mean 83 if i arrange the numbers in ascending order
*September 24, 2010*

**math**

- 2.3 – (- 8.9) does it equal -6.6 or x= 2/3=4/6=6/9 x=8/9-6/9=2/9
*September 24, 2010*

**math**

11. Place the following set of numbers in ascending order. 20, –7, 5, –5, 12, 4, 15
*September 24, 2010*

**math**

Find the five-number summary of the following set of numbers: 349, 243, 119, 363, 246, 505, 263, 221, 324
*September 24, 2010*

**math**

Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61
*September 24, 2010*

**math**

4-(-3)+1/2-2/(-2)
*September 22, 2010*

**math**

16?(-2)+(-4)/2^3+4 How would i work out this problem to get to the soultion
*September 22, 2010*

**math**

(-9)(5)/-3
*September 22, 2010*

**math**

(-6)^2-4^2 How wouLD I WORK THIS PROBLEM OUT
*September 22, 2010*

**math**

-1/2-(-5/8)
*September 22, 2010*

**math**

-3.4-(-7.6)
*September 22, 2010*

**math**

(-6)2 (-4)2
*September 21, 2010*

**math**

soltion for -3( -6)+(4)(-2)
*September 21, 2010*

**math**

-9--4
*September 21, 2010*

**math**

3/7-6/7,1/7,-1/2,2/7
*September 19, 2010*

**math**

1/3+(-5/6)+-1/2=
*September 19, 2010*

**math**

What is the population of Europe in 2000? (b) What is the total area of Europe?
*September 16, 2010*

**math**

how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful
*September 14, 2010*

**math**

How would you use the concepts from Chapter 8 in a real-life situation?
*September 12, 2010*

**math**

Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?
*September 12, 2010*

**math**

. Which pair of fractions is proportional?0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4 or 0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4
*September 11, 2010*

**math**

Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?
*September 11, 2010*

**Chemistry II**

Answer in Minutes = 63 minutes. Thanks
*February 4, 2010*

**Chemistry II**

Spec heat of ice: 2.09 j/(g*deg C) Spec heat of liq water: 4.18J/(g*deg C) Enthalpy of fusion: 334 J/g Enthalpy of vaporization: 2250 J/g
*February 4, 2010*

**Chemistry II**

How long would it take for 1.50mols of water at 100.0deg C to be converted completely into steam if heat were added at a constant rate of 16.0j/s
*February 4, 2010*

**HCA/220**

◦Scenario 3: You have just started your career as a physical therapist and have been assigned to a mentor. Begin a discussion with your mentor that mentions specifically how you have helped your patients improve their mobility and aided in their recoveries.
*January 10, 2010*

**HCA/220**

Scenario 1: You are attending a wellness conference and one of the exhibitors is a chiropractor in your local area. You are unfamiliar with chiropractic care and want to learn more. Since you are at the conference, the doctor assumes that you have knowledge of medical ...
*January 10, 2010*

**HCA/220**

◦Scenario 2: You are an allied health professional working with an orthopedist. You have been working with the patient and need to update the doctor on the reason for the patient’s visit. Begin describing the patient’s concerns. Your classmates may continue ...
*January 10, 2010*

**IT/Proj Mgmt**

Innovative Systems is ready to get started using the PMI standard. BPP is advising IS on a new project bid. The project involves setting up an automated tracking system for a library. Radio frequency (RF) tags would be attached to each book, and a networked computer database ...
*June 21, 2009*

**College Algebra**

If a and b are in parenthesis, the answer is: c = d*e^(n/(a+b)) If not, the answer is: c = d*e^((n/b)-(a/b))
*April 30, 2009*

**math**

Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61
*March 29, 2009*

**math**

there are 4 cows and 8 ducks
*March 16, 2009*

**PSY HELP!!! Please**

Here are the statements OPPSS.... The healthy personality is found in balancing the social self with the individual self Popular theorists include Freud, Jung, and Erikson Consists of five major personality factors which are reasonably stable elements of personality. These ...
*October 24, 2008*

**PSY HELP!!! Please**

Match the psychological theories with the appropriate statement(s): Psychodynamic Theory Trait Theory Learning Theory Sociocultural Humanistic Theory Popular theorist Eysenck initiated the five-factor model. The healthy personality is found in balancing the social self with ...
*October 24, 2008*

**psychology**

Stress scenario 1: Every morning, as she prepares for her two-hour drive to work, Carole gets a headache. Carole is experiencing the frustrations of commuting. From the information provided, it does not appear that Carole is actively coping with her stress. Carole could choose...
*October 8, 2008*

**chemistry**

How many grams of NaCl should be added to 250 grams of water to make a 0.40 m solution? I got 19 grams. this is how I got it. first I found the mass of water = 18g then I converted that to mols 18/250 = .0072. I subtracted 0.072 - 0.40 = 0.328 I found the mass of NaCl = 58 0....
*March 24, 2007*

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