Wednesday

May 25, 2016
Total # Posts: 756

**physics**

do your own homework
*April 21, 2016*

**Chemistry**

Why is the equivalence point pH of the HCl-TRIS titration = 4.6?
*April 8, 2016*

**Chemisty**

Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5mL and 7.5mL of titrant, a) in the titration of a 10mL aliquot of standard 0.1500M TRIS base (Kb=1....
*April 8, 2016*

**Physics**

A 3.0cm diameter crankshaft that is rotating at 2500 rpm comesto a halt in 1.5 s. a- what is the tangential acceleration of a ponit on thesurface? b-how many revolutions does the crankshaft make as itstops? For this question, what are the applicable concepts and/or laws and ...
*March 31, 2016*

**Math **

Determine the most probable next term in the following list of numbers. 1, 7, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 1, 7, 1, 1, 1, 1 The most probable next term is______
*March 9, 2016*

**Physics**

A wire is made of a material with a resistivity of 2.08184 × 10−8 Ω · m . It has length 4.42917 m and diameter 0.6763 mm . What is the resistance of the wire? Answer in units of Ω. Would you just use the equation R = PL /a?
*March 8, 2016*

**CHEMISTRY HELP**

If a/b = 10.23, what is a and what is b?
*February 19, 2016*

**CHEMISTRY**

Hi DrBob222, can you explain what you mean by "Solve the two equation simultaneously for a and b. I get something like 2 for acid and 23 for base." I don't know how you got that and what you started with. Thanks!
*February 18, 2016*

**CHEMISTRY**

1. What is 5/60? 2. How did you get 10.3 for b/a?
*February 18, 2016*

**CHEMISTRY**

Calculate the amount (in mL) of 1.520M NaOH that is required to add the following acetic acid solution to prepare a buffer with the corresponding pH: 30.00mL of a 5.00% (w/v%) acetic acid; the resulting acetate buffer has a pH of 5.75. pKa of acetic acid = 4.74
*February 18, 2016*

**physics**

A disc has a mass of 340kg, and is mounted to a frictionless axle and is free to rotate around it. Model the shape of the disc as a hollow shaft on axis where the inner and outer diameters are 600mm and 1200mm respectively. A wire is wrapped around the disk, and is the pulled ...
*February 6, 2016*

**Physics**

An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the maximum height reached by...
*January 31, 2016*

**Algebra**

Im to write a function,that showsthe total cost of b(x) to rent a car driven (x)miles
*January 21, 2016*

**Physics**

A gun is fired vertically into a 1.60 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 195 m/s, how high will the block rise into the air after the bullet becomes embedded in it?
*January 20, 2016*

**math**

how to break down 2 1/3-1 3/4
*January 19, 2016*

**Physics**

A 0.500 kg object is thrown vertically upward with an average applied force of 8.20 N by a student. The force is applied through a displacement of 1.50m. a. What is the average net force acting on the object? b. What is the velocity of the object when it leaves the student'...
*January 13, 2016*

**Math**

Yes, you are correct. 1 gal is 4 qts, so 300 gals = 1200 qts. So 600 qts is 50% of 1200 qts.
*January 10, 2016*

**probability**

There are 4 white socks and 4 black socks. You randomly divides socks into pairs. What is the probability that each pair consists of 2 socks of the same colour? Express answer as a fraction. I'm not really sure how to start this question.
*December 30, 2015*

**probability**

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...
*December 9, 2015*

**probability**

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...
*December 9, 2015*

**College Physics**

How much energy is required to bring 10.0 grams of ice at -5.00 degrees to 105-degree steam? Assume the system is isolated so that no mass is lost to the surroundings
*December 8, 2015*

**chem**

what are ways to increase the solubility of SnF2 at constant temperature and pressure. I think adding a strong acid will work not sure what else.
*December 8, 2015*

**Math**

A Ferris wheel has a radius of 30 feet and travels 3.6 feet every second. How long does it take for the Ferris wheel to complete one revolution?
*December 1, 2015*

**Social Studies**

philadelphia
*November 23, 2015*

**math**

Deez nuts goes in the banana factory please liek dis i want attention
*November 16, 2015*

**Math **

A manufacture has been selling 1400 television sets a week at $450 each. A market survey indicates that for each $14 rebate offered to a buyer, the number of sets sold will increase by 140 per week. a) Find the function representing the demand p(x) , where x is the number of ...
*November 12, 2015*

**Math **

The blood vascular system consists of blood vessels (arteries, arterioles, capillaries, and veins) that convey blood from the heart to the organs and back to the heart. This system should work so as to minimize the energy expended by the heart in pumping the blood. In ...
*November 12, 2015*

**Math **

A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving along the ground when she is 30 ft from the base of the pole? How fast is the length of her ...
*November 12, 2015*

**chem**

Idk what the answer is does anyone know
*November 11, 2015*

**Alegebra**

I need some help just setting up an equation for this problem, I cannot figure it out. One train travels from A to B at 19mph. A second train travels from B to A at 21 mph. One hour before the trains pass each other, how far apart are they?
*November 11, 2015*

**Organic Chemistry**

How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the observed rotation...
*November 8, 2015*

**chemistry**

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.
*October 10, 2015*

**Physics help!!**

A plane is flying horizontally at constant speed, vo. when it releases a package. The package lands on the ground at t seconds later. Just before the package lands... a. What is its horizontal component of velocity? Leave in terms of vo and t. b. What is its vertical component...
*September 25, 2015*

**Chemistry**

.0000625
*September 25, 2015*

**Math**

If I have a random stack of 5 quarters, the 1st 3 quarters are heads. What is the probability the the 4th quarter would be another head What is the probability the the 4th quarter would be a tail Is there a way to show the probability or odds that you would continue to keep ...
*September 23, 2015*

**english**

compare and contrast the words maneuver and manipulate
*September 20, 2015*

**Physics**

Thank you, but it did actually say meters haha
*September 18, 2015*

**Physics**

Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h? Answer in units of m.
*September 18, 2015*

**Physics**

A model rocket is launched from rest with an upward acceleration of 6.30 m/s2 and, due to a strong wind, a horizontal acceleration of 1.50 m/s2. How far is the rocket from the launch pad 5.30 s later when the rocket engine runs out of fuel?
*September 9, 2015*

**Culler middle school**

-4*3=
*August 30, 2015*

**language arts**

I guess just foods that are good for you
*August 16, 2015*

**language arts**

what are some examples of benign foods
*August 16, 2015*

**ENGLISH**

2)Writing 3)Checking for mistakes 4)revising
*July 7, 2015*

**algebra**

Susan is on her way home in her car. She has driven 24 miles so far, which is one-half of the way home. What is the total length of her drive?
*June 29, 2015*

**Algebra**

1 year
*April 29, 2015*

**Biology**

What is osmosis
*April 27, 2015*

**Further maths**

Show graphically the solution sets of the following inequalities: (a) X square - 7 * h2 > 0 (b) 3X square - 5X - 2 > 0
*April 27, 2015*

**Physics**

A 250kg car initially at rest was travelling with acceleration of 10m/s square. Calculate the kinetic energy after 3 seconds
*April 27, 2015*

**calculus check**

Find the limit as x approaches 3 of [(2x^3-5x^2+7)/(3sin(xpi/6)-cos(xpi))] When I plugged in 3, I got 4.
*April 26, 2015*

**math**

Raymond has four more sisters than Tyler.Write a number sentence to show Raymond=r tyler=t
*April 26, 2015*

**calculus**

If f(x)=the integral of (3x^2+2x+4) dx, find C if f(1)=10.
*April 26, 2015*

**physics**

A charge of -4.50 10-6 C is placed at a point in space where the electric field is directed toward the right and has a magnitude of 9.00 104 N/C. What are the magnitude and direction of the electrostatic force on this charge?
*April 23, 2015*

**Physics**

Two disks are originally separated. The mass of Disk #1 is 1.5 kg, and the mass of disk #2 is 2.6 kg. Disk #1 has a radius of 10 cm, and it is rotating at an angular velocity of 15.0 rad/sec. Disk #2 has a radius of 15 cm, and it rotates in the opposite direction at an angular...
*April 6, 2015*

**physics**

2. On the spin cycle on a washing machine, the drum holding the clothes goes from zero to 180 rpm (revolutions per minute) in 8.0 seconds. (Hint: Be sure to change rpm to radians/sec.) (a) What is the angular acceleration (in radians/sec2) during this time period? (b) How many...
*April 6, 2015*

**math**

3 times 2 and 2/5
*March 21, 2015*

**chemistry**

net ionic equation for reaction between copper carbonate and the hydroiodic acid
*March 21, 2015*

**Algebra**

HI can you please help this is the only question I cant figure out :) Graph the linear function y = 1/3x - 4 1/3 is one third :)
*March 17, 2015*

**Algebra**

What are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15? 15,30,45,60 15,16.5,18,19.5 15,22.5,33.75,50.625 none of the above What are the first four terms of a geometric sequence if the common ratio is 10 and the first ...
*March 9, 2015*

**math**

A spring is attached to the ceiling and pulled 12 cm down from equilibrium and released. The amplitude decreases by 17% each second. The spring oscillates 16 times each second. Find an equation for the distance, D the end of the spring is below equilibrium in terms of seconds, t.
*March 1, 2015*

**Algebra II**

Let 1990 be 1, 1991 be 2, 1992 be 3, and 1994 be 4 3885=10(3^3)+115(3^2)+25(3)+2505 3885= 270 + 1035 + 75 +2505 3885=3885 1992 is the answer
*March 1, 2015*

**math**

I multiplied my number by 102,then subtracted 228. I then divided by 6.Finally I added 51. My result was 200. What number was I thinking of ?
*February 22, 2015*

**bioilogy**

Discuss possible benefits and drawbacks of a transgenic organism such as Bt corn?
*February 12, 2015*

**math **

use these 5 digits to make 24 0-1-2-3-4 Use each digit only once. record how you made 24
*February 8, 2015*

**math**

use an array to explain how you can solve 15 x 6 using facts that you already know
*February 7, 2015*

**Chemistry**

Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid
*February 4, 2015*

**Algebra**

If x is the length and y is the width of a rectangle, find and graph all integer pairs(x,y) that create a rectangle with a perimeter of 12 cm.
*January 26, 2015*

**business math**

The French company has a beginning inventory of $77,000 and an ending inventory of $80,000. sales were $280,000. assume French's markup rate on the selling price 40%. based on the selling price what is the inventory turnover at cost. please explain?
*January 23, 2015*

**physics **

The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 50t - 2t2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?
*January 22, 2015*

**calculus **

The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 50t - 2t2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?
*January 22, 2015*

**Math/physics**

Steve??? Can you help me?
*January 16, 2015*

**Math/physics**

This is my last problem. Please help! A motorcycle rider starts out on top of a ramp 10 m high and then rides down and jumps the motorcycle when he comes to the end of the ramp (like evil knivel). The rider is at the peak of his jump at 5 m. How fast is the motorcycle going ...
*January 16, 2015*

**Math**

Thank you, Steve!
*January 15, 2015*

**Math**

Can someone please help me set this up. I didn't quite understand how to do this today. Before leaving Earth, the mass of an astronaut is measured to be 60kg. The astronaut lands on the Moon and measures the acceleration of gravity to be 1.6 m/s2(squared). What would the ...
*January 15, 2015*

**Math**

17 over 20 is your answer. 85 over 100 which is 85% is divisible by 5. So, you answered 17 out of 20 questions correctly.
*January 13, 2015*

**Math - Ratio**

A map scale is 1:10,000. Find the actual distance in centimetres represented on a map by 5cm. Convert your answer to metres and kilometres.
*January 13, 2015*

**Physics**

Right now in physics we are learning about electric potential energy and electric potential. My question is: P and Q are points within a uniform electric field that are separated by a distance of 0.1 m. The potential difference between P and Q is 50 V. How much work is ...
*January 9, 2015*

**fractions**

In Mr. Johanessen's class, 1/4 of the students failed the final exam. Of the remaining class, 1/3 scored an A. What fraction of the whole class passed the test but scored below an A?
*January 8, 2015*

**algebra**

Two positive whole numbers are in a ratio of 3 to 4. If the smaller of the two numbers is 9, what is the average of the two numbers?
*January 8, 2015*

**Algebra PLEASE?**

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your operations is an ...
*January 6, 2015*

**Math**

Evaluate 1/3 + square root(3)/12 + 1/16 + square root (3)/64. I hope this makes sense. Right now we're learning sequences and series and I'm really confused on this question.
*December 15, 2014*

**English Help**

I got it :) I realized that Thank you!
*December 10, 2014*

**English Help**

To what extent can goals and behaviors change as a result of learning
*December 10, 2014*

**Algebra please?**

This is my last test question :) How does finding the square root of a number compare to finding the cube root of a number? Use the number 64 in your explanation.
*December 9, 2014*

**MY BRO'S B-DAY HELP!!!**

Bruh you can let him play your videogames if you have any with you! :) I always liked it when my brother let me play with him :D
*December 9, 2014*

**AP Calc **

A spherical snowball is uniformly melting art of rate of pi/18 in^3/min. At what rate is its diameter decreasing when its surface area is 3 in^2?
*December 9, 2014*

**Algebra Help please?**

is it 256?
*December 6, 2014*

**Algebra Help please?**

what is the value in "x" in 16^2 = x
*December 6, 2014*

**Algebra PLEASE Help**

3(4 - 2x) - -2x SHow how you did it?
*December 4, 2014*

**Math**

isn't it 7m + 3m = 10m?
*November 20, 2014*

**Pls Help **

:/ Im sorry but its not that i'm impatient I has to go somewhere soon D:.
*November 20, 2014*

**Science help URGENT**

Muscles located in the walls of the small intestine help push digested material along. Muscles located in the walls of arteries help push blood along. Based on this information and your understanding of muscle types, which of the following statements is correct? Both sets of ...
*November 20, 2014*

**LA - 2 questions**

She will go to paris next autumn Im not sure But, bleak means Like cold and cloudy, Unwelcomeing, or discouraging
*November 19, 2014*

**Algebra Help! Please**

So there is no solution?
*November 19, 2014*

**Algebra Help! Please**

Ok so I did what you told me reiny but I cant figure out number three which is here 10x - 2 - 6x = 3x - 2 + x Please show how You did it please?
*November 19, 2014*

**ALGEBRA Help Please**

Decide whether each equation has one solution, no solution or infinitely many solutions 2(x - 3) = 2x 3(y - 3) = 2y - 9 + y 10x - 2 - 6x = 3x - 2 + x 4(x + 3) + 2x = x - 8 Please Show how you did it if possible please thanks! :)
*November 19, 2014*

**Science? Help**

Summarize the steps of sexual reproduction and explain how it increases genetic diversity.
*November 18, 2014*

**Algebra Help**

Oh Ok thank you
*November 18, 2014*

**Algebra Help**

Last one 3(x - 4) = 5(x + 2) Please show how you did it
*November 18, 2014*

**Algebra Help**

Than You Mrs. Sue :D
*November 18, 2014*