Tuesday

September 30, 2014

September 30, 2014

Total # Posts: 1,517

**Calculus**

Both x and y denote functions of t that are related by the given equation. Use this equation and the given derivative information to find the specified derivative. Equation:35x^2+20y^2=1 Given that dx/dt=4, find dy/dt when (x,y)=(1/7sqrt2, 1/5sqrt2)
*July 17, 2010*

**Calculus**

Find f'(x) when f(x)=sin(1/x^3)
*July 17, 2010*

**chemistry**

how many grams of NaOH are contained in 250 mL of a 400 M sodium hydroxide solution
*July 14, 2010*

**history**

the twenty fifth amendment describes the sequence of events that would install the vice president as acting president against the will of the president. outline that sequence of events
*July 9, 2010*

**chemistry**

The vitamin niacin can be isolated from liver, yeast, milk, and whole grain. Which source would be the best for a multivitamin tablet
*July 8, 2010*

**chemistry**

The vitamin niacin can be isolated from liver, yeast, milk, and whole grain. Which source would be the best for a multivitamin tablet
*July 7, 2010*

**ap chemistry**

purpose three models that explain JJ Thomson's findings and evaluate them? What does this mean? are you suppose to make up your own or look to others?
*July 7, 2010*

**pharmacy**

2. On a job interview for a position as a pharmacy technician, the interviewer asks you what a dosage form of medication is. You respond that a dosage form is A. the way a medication is given. B. the use of a medication, either locally or systemically. C. how a medication is ...
*July 5, 2010*

**Pharmacy**

Select the abbreviation which means "make". a. a.c. b. b.i.d. c. M d. F I think it's D but I am not sure.
*July 5, 2010*

**chemistry**

an aspirin tablet contains 5.00X10^2 mg of active ingredient. how many grams of ap of active ingredient does it contain
*July 5, 2010*

**Calculus**

sketch the graph of a function f that is continous everywhere except at x=2, at which point it is continous from the right.Also it is known that f(0)=6 and f(7)=2.
*July 4, 2010*

**kindergarten**

you should make cards with easy words on them and make a picture of the meaning of the card. show it , say it and try to see if your baby can say it to . this helps by giving your baby new words to learn at this young age. i hope this helps you.
*July 3, 2010*

**kindergarten**

you should make cards with easy words on them and make a picture of the meaning of the card. show it , say it and try to see if your baby can say it to . this helps by giving your baby new words to learne at this young age. i hope this helps you.
*July 3, 2010*

**chemistry**

the announced attendance at a football game was 52,806. is this an exact number?
*July 2, 2010*

**chemistry**

you have two beakers one filled to the 100 ml mark with sugar and the other filled to the 100 ml mark with water. you pour the sugar and all the water together in a bigger beaker and stir until all the sugar is compeletely dissovlved. what happens to the mass of the solution?
*July 2, 2010*

**Calculus**

Find the Limit lim as t approaches 1 of (t^3+5t^2-13t+7)/(t^3-3t+2)
*June 30, 2010*

**history**

What were John f Kennedy's key legislation?
*June 30, 2010*

**algebra**

6x-8y=-16 8y-6x=16
*June 29, 2010*

**Biology**

what happens to co2 levels with increasing sugar concentration?
*June 29, 2010*

**10th grade Math**

1.)Explain why ironing boards always remain parallel to the floor and can be adjusted for people of various heights. You may want to consider the following: a.The legs of the board are built so that AD = BD and DE = DF, and ADF and BDE are straight lines as shown. b.Which ...
*June 26, 2010*

**Calculus**

let f(x)=(7+x)/(7-x), g(x)=7x/(7-x) Find formula for f*g and state the domain of the composition
*June 25, 2010*

**Calculus**

Write this expression as a single logarithm 6ln(x+8)+1/8lnx-ln(cosx)
*June 25, 2010*

**calculus**

let f(x)=sqrt(x-3), g(x)=sqrt(x^2+3) Find a formula for f*g and state the domain of the composition
*June 25, 2010*

**calculus**

f(x)= 1/x, x greater than 7 3x, x less than or equal to 7 Find f(7t)
*June 25, 2010*

**calculus**

find a formula for f^-1(x) f(x)=x+15/x-15
*June 25, 2010*

**calculus**

how do I rewrite it as a single logarithm
*June 25, 2010*

**calculus**

6ln(x+8)+1/8lnx-ln(cosx)
*June 25, 2010*

**Calculus**

y=x^2-11x+30 For what values of x is y greater than or equal to 0?
*June 25, 2010*

**Calculus**

f(x)= 1/x, x greater than 7 3x, x less than or equal to 7 Find f(7t)
*June 25, 2010*

**mechanics**

An empty railway wagon of mass 4500kg travelling at 15m/s collides with a stationary loaded wagon of mass 2400kg. The empty wagon bounces backwards at 4m/s. a) Find the velocity of the loaded wagon after the collision (answer was 3.49m/s) b) Find the kinetic energy lost in the...
*June 23, 2010*

**Thermal physics**

when breathing slowly a person inhales air at room temperature and exhales it at body temperature. We may assume that the lungs maintain ordinary atmospheric pressure as they expand. If a resting person inhales 0.6L of air at 24 degrees what volume does the air occupy when it ...
*June 23, 2010*

**Pharmacy**

1.This section of a monograph would tell you if the drug were soluble in water. a.description b.how supplied c.clinical pharmacology d. dosage and administration 2. Information on how to treat a patient who has taken a toxic dose of a medication would be found in this section ...
*June 23, 2010*

**Biology**

advantage and disadvantage of respiring anaerobically?
*June 22, 2010*

**Biology**

what is the relationship between the amount of starch and maltose present during starch hydrolysis.
*June 22, 2010*

**Biology**

is starch present at time zero? should it be present? why or why not?
*June 22, 2010*

**Biology**

another way to word: the effects of temperature on human and fungal amylase
*June 21, 2010*

**ENGLISH**

CAN YOU UNSCRAMBLE THIS WORD THABIAT
*June 20, 2010*

**Chemistry**

What volume of 0.123 M AgNO3(aq) is needed to form 0.657 g of AgCl(s)? 0.564 mL. 18.6 mL. 37.2 mL. 1.77 L.
*June 12, 2010*

**trig**

find the 5 other trig functions if cos(theta) = square root of 2/2 and cotangent is less than 0
*June 9, 2010*

**trig**

find the 5 other thrig functions if cos(theta) = square root of 2/2 and cotangent is less than 0
*June 9, 2010*

**Chemistry**

Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.
*June 7, 2010*

**Chemistry**

Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.
*June 7, 2010*

**Chemistry**

Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.
*June 7, 2010*

**Math**

make the first cut at 6cm and the second at 22cm. You will have 3 pieces that measure 6cm, 16cm and 48cm.
*June 2, 2010*

**Chemisty**

Im totally lost on how to do redox reactions. Can any one show me the steps on how to do MnO4-1 +C7H60 => Mn2 +c7H6O2? im trying to study for a test and im totally lost. thanks in advanced.
*May 31, 2010*

**science**

why is it advantageous for the stomach to be below the diaphragm rather than above it
*May 30, 2010*

**japenese**

what does furasosu mean?
*May 22, 2010*

**calculus**

Sorry, I don't understand your reply... This question has a prime after the f by the way. It's f prime, aka the derivative. That's why the function is decreasing.
*May 20, 2010*

**calculus**

f'(x) < 0 if |x| < 1 And apparently this means f is decreasing on (-1, 1). I don't understand this. I know f'(x) < 0 means the function is decreasing. But I don't understand the absolute value. It means I can put -1 or 1 inside, but wouldn't it ...
*May 20, 2010*

**6th grade**

which eurasian republic is the largest
*May 18, 2010*

**chemistry**

A 0.26 M solution of a diprotic acid, itaconic acid, has an [H+] of 6.0 10-3 M. What is the value of K1? I got answer like 2.6 10-1 ,I am not realy sure if u help me C5H6O4--> C5H5O4 + H+ K1 is constant
*May 15, 2010*

**Chemistry**

A sample of argon gas has a volume of 715 mL at a pressure of 1.34 atm and a temperature of 144 Celsius. What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 622 mmHg and 321 K?
*May 15, 2010*

**chemistry**

how many joules are required to heat a frozen can of juice (360 grams) from -5C (the temperature of an overcooled refrigerator to 110C) the highest practical temperature within a microwave oven?
*May 13, 2010*

**Chemistry**

What mass of Zn will be dissolved in 10 mL pH=2 HCl solution? Zn + 2HCl--> ZnCl2 + H2
*May 10, 2010*

**physics problem**

At body temperature the latent heat of vaporization of water is Lv = 2.26e3 kJ/kg. (a) A naked person with a surface area A = 1.55 m2 and a skin temperature = 37.3 degrees is in a sauna room at T = 82.0 degrees. The person's skin has an emissivity e = 0.910. She evaporates...
*May 2, 2010*

**grammar**

why are great numbers of students choosing to pursue their college degrees using their homw computers. Benjamin Franklin Said; A penny saved is a penny earned". This principle applies to the american and foreign online student. Today students choose to take online courses...
*May 2, 2010*

**Physics ptoblem **

At body temperature the latent heat of vaporization of water is Lv = 2.26 ¡Ñ 103 kJ kg−1. (a) A naked person with a surface area A = 1.55 m2 and a skin temperature £c = 37.3 ¢XC is in a sauna room at T = 82.0 ¢XC. The person's skin has an...
*May 2, 2010*

**Physics **

The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 13 g nail when it is struck by a 550 g hammer moving with an initial speed of 4.0 m/s. I solved for the final velocities of both and got 3.8 m/s ...
*April 27, 2010*

**Physics**

3.8 m/s for the hammer*
*April 27, 2010*

**Physics**

The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 13 g nail when it is struck by a 550 g hammer moving with an initial speed of 4.0 m/s. I solved for the final velocities of both and got 3.8 m/s ...
*April 27, 2010*

**Physics**

Thanks! i was so close to that equation i just wasn't moving my total mass to the left side.
*April 27, 2010*

**Physics**

Suppose now that the air carts below are both moving to the right initially. The cart to the left has a mass m1 and an initial speed v0; the cart to the right has an initial speed v0/2. If the center of mass of this system moves to the right with a speed 6/7 v0, what is the ...
*April 27, 2010*

**trigonometry**

solve graphically. Estimate to the nearest tenth if the roots are not integers. x^2 y^2 --- + ---- =1 9 4 3x-2y=6
*April 27, 2010*

**college physics**

The energy difference between states A and B is twice the energy difference between states B and C (C > B > A). In a transition (quantum jump) from C to B, an electron emits a photon of wavelength 300 nm. What is the wavelength emitted when the photon jumps from B to A? ...
*April 26, 2010*

**Document and visual design**

correct
*April 26, 2010*

** Document and Visual Design**

30. transparencies. you can write on them like dry erase boards and they are displayed on a wall like a poster. like visual or whatever 32. dry erase boards. you have to usually mount them on a wall for the class to see before you use it.
*April 26, 2010*

**Physics**

A 150.0 g aluminum cup is filled with 450. g of water at 95℃. The combination cools uniformly by 1.20℃ per minute. At what rate (J/s) is thermal energy being removed from the combination?
*April 25, 2010*

**math**

This isn't a specific math question. I'm just looking for some tips for my calculus midterm tomorrow. I'm terrible at math and I can't seem to "think outside the box" in order to do problems correctly. I know my stuff but if a teacher throws something...
*April 25, 2010*

**Calculus**

Nevermind! I figured out you're supposed the plug the positive value into the derivative v'(t).
*April 20, 2010*

**Calculus**

Hi I have the same question. The first part is correct to find the maximum height, but while solving for the quadratic formula to find the velocity when it hits the ground, the answer is incorrect. (You would get 7.2749 and -0.27492 after solving the quadratic)
*April 20, 2010*

**America Literature **

Why is Whitman the father of America's poet in Emerson's point of view?
*April 17, 2010*

**America Literature **

Why Emerson considered man is an analogy? And What is th relationship between human, god and nature in Emerson's point of view?
*April 17, 2010*

**science**

How do plants vary in their efficiency at producing joules for human consumption?
*April 15, 2010*

**math**

Conduct an interview to find out how someone else responds to the question, “Why is a negative number times a negative number a positive number?” Write a report describing your findings.
*April 11, 2010*

**10th grade**

determine m given that m>0 and the points (m,3) and (1,m) lie on a line with slope m
*April 4, 2010*

**pHYSICS HElp**

***EXTRA CREDIT*** Figure 8-33 shows a 1.50 kg block at rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10.0 cm that has a ...
*March 31, 2010*

**Physics HELp**

In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 785 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless, except for a rough patch of width 5.0 cm that has a...
*March 31, 2010*

**Physics **

An object moves along the x axis, subject to the potential energy shown in Figure 8-24. The object has a mass of 1.8 kg, and starts at rest at point A. (a) What is the object's speeds at point B, at point C, and at point D?
*March 31, 2010*

**Physics **

An object moves along the x axis, subject to the potential energy shown in Figure 8-24. The object has a mass of 1.8 kg, and starts at rest at point A. (a) What is the object's speeds at point B, at point C, and at point D?
*March 31, 2010*

**Physics**

A) ( 1/2 )kx^2 = ( 1/2 )mv^2 so.. k=mv^2/x^2 (make sure you convert 5.7cm to meters first.) B) ( 1/2 )kx^2=(1/2)mv^2 so... v^2=kx^2/m solve for v.
*March 30, 2010*

**Physics**

In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 785 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless, except for a rough patch of width 5.0 cm that has a...
*March 30, 2010*

**Physics**

Figure 8-33 shows a 1.50 kg block at rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10.0 cm that has a coefficient of ...
*March 30, 2010*

**chemistry**

ohh there are no numbers just a chart to fill out
*March 29, 2010*

**chemistry**

how do you find the mass solute(g), GFM(g/mole), moles of solute, volume of solution, and molarity of solution (M), of CaSO(4)? *how would i solve this set by set? * what are the formulas?
*March 29, 2010*

**Physics**

Delta* wow i cannot type
*March 29, 2010*

**Physics**

also Deta E*
*March 29, 2010*

**Physics**

mgh* cos theta* sorry
*March 29, 2010*

**Physics**

for simplicity i am going to do this symbolically. m = .47Kg l = 1.2m g = 9.81m/s² è = 31 degrees the change in potential energy is mgÄh in this problem, Äh = l-lCos(è) = l(1-cosè) (it is 1-cosè becaus cos 90=1.. and its cos 90-cos&...
*March 29, 2010*

**Physics**

you do: 1/2mv(initial)^2+mgh=1/2mv(final)^2 so simplify that to : v(inital)= sqrt(v(final)^2-2gh) For b): 1/2mv(initial)^2=mgh solve for h : h=v^2/2g then add your original height to the new height for your answer
*March 29, 2010*

**Math**

This week, the Laketown Cruise Company took its boat on 19 cruises, carrying the boat's full capacity of 46 guests on each cruise. If each guest paid $22 admission, then how much admission was collected by the company this week? A) Estimate B) Exact calculation
*March 29, 2010*

**paralegal**

What are the similarities and differences of federal and state systems?
*March 27, 2010*

**physics**

The diffusion coefficient for calcium ions crossing a biological membrane 10nm thick is 300 micrometers squared/second and the concentration difference of calcium ions across the membrane is 400 mol/m^2 (Molar mass of calcium is 40 kg/mol) Determine the number of moles of ...
*March 27, 2010*

**CHEMISTRY**

Hey 1)how do you estimate the line widths (full width half maximum) of the peaks arising from: (a) The emission of a hollow cathode lamp (b) The absorption peak of caffeine in the UV –visible spectrum (c) The d-d transition observed for Ni2+ in aqueous solution 2)Comment ...
*March 26, 2010*

**Physics**

4.2m
*March 23, 2010*

**Chem**

Solid carbon dioxide (dry ice) goes from solid to gas at -78C. The molar heat of sublimation is 25.3 kj/mol. In one experiment 34.5g of dry ice are placed in an insulated isolated container with 500 g of water at 25C. What temp of the water is expected after all bubbles are ...
*March 11, 2010*

**Time Zones**

Check my work. Calculate the correct time in brackets: 1. 1:00am at 30W = (11:00pm) at 60W 2. 3:00pm at 15W = (1:00pm) at 45W 3. 1:00pm at 120E = (9:00am) at 60E 4. 12:00pm at 15E = (6:00pm) at 105E 5. 11:00am at 15E = (9:00am) at 15W Calculate the correct longitude in ...
*March 4, 2010*

**Physics**

got it v=[(2*m1)/(m1+m2)]Vo then take your answer and insert into 1/2mv^2 and divide by 1000
*March 3, 2010*

**Physics**

i agree with that but how would you find the kinetic energy acquired by the nail after you get these numbers?
*March 3, 2010*

**chemistry**

Reacting 959 mol of SiO2 with excess carbon yields 28.8 kg of SiC. What is the percentage yield? SiO2 + 3C--> SiC + 2 CO
*March 2, 2010*

**chemistry**

2 KClO3(s)--> 2 KCl(s) + 3 O2(g) How many milliliters of O2 will form at STP from 38.8 g KClO3?
*March 2, 2010*

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