Thursday

November 27, 2014

November 27, 2014

Total # Posts: 536

**physics**

A sample of blood is placed in a centrifuge of radius 20.0 cm. The mass of a red blood cell is 3.0 10-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 10-11 N. At how many revolutions per second should the centrifuge be operated?
*October 18, 2010*

**physics**

A 512 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. (a) Find the satellite's orbital speed. (b) Find the period of its revolution. (c) Find the gravitational force acting on it.
*October 18, 2010*

**graph on a plane**

graph the inequality on a plane 3x+4y is less then or equal to 12
*October 12, 2010*

**graph on a plane**

graph the inequality on a plane 3x+4y is less then or equal to 12
*October 12, 2010*

**Physics**

θ = 30° x-direction: vi + vf cos θ = x 1.4m/s - 0.79m/s(√3/2) = 0.716m/s y-direction: vf sin θ = y 0.79m/s * 0.5 = 0.395m/s Speed = √(x² + y²) √[(0.716)² + (0.395²)] = 0.818 m/s Direction: Tan-¹ (y/x) = Tan-¹...
*October 7, 2010*

**7th math**

how to do 345x 7.899=
*September 18, 2010*

**Physics**

A bag of sugar weighs 4.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? 1 N Repeat for Jupiter, where g is 2.64 times that on Earth. 2 N Find the mass of the bag of sugar in kilograms at each of the three...
*September 16, 2010*

**Math Problems**

Pat worked 43 hours and received $7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings? $22.83 $322.63 $269.75
*September 16, 2010*

**Physics**

The leg and cast in the figure below weigh 280 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 130 N. Determine the weight w2 and the angle á needed so that no force is exerted on the hip joint by the leg plus cast.
*September 15, 2010*

**geometry**

i meant geometry but im still stuck and i have 3 more questions about this
*September 13, 2010*

**john marshall**

i don't understand how to do this prblem what is ab=x +7,bc=17,ac =2x
*September 13, 2010*

**math 5 grade**

Idk just wanted to post
*September 13, 2010*

**history**

How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia, and Europe? Be specific. How were these differences important to the international state of affairs in 1450? this is using the american nation: a history...
*September 10, 2010*

**business**

Choose one of the organizational departments, such as accounting, finance, HR, and so on of a business. What is the role of this department? What types of information does the department need? How does the department use that information?
*August 31, 2010*

**math**

how would i construct a truth table for (p and ~q) double arrow q (sorry inexperienced with the symbols and keyboard shortcuts).
*August 23, 2010*

**math**

how would i construct a truth table for ~q then p (or arrow p)
*August 23, 2010*

**health**

What would be a strength and a weakness for the center of disease control?
*July 10, 2010*

**History Check**

The _____ Plan, favored by _____ States, proposed giving States equal representation in a unicameral Congress.
*June 25, 2010*

**English-Ms. Sue**

Start by taking out all the details. They are good, but this is a summary not a report about the book. You can still summarize those points but not in depth. Hope I helped! :)
*June 16, 2010*

**Algebra**

solve by elimination method 5x+2y=-13, 7x-3y=17
*June 11, 2010*

**reimbursement methodologies**

medicare and medicaid financial issues put constraints on a. physician services
*May 14, 2010*

**science**

what roes do differnt parts of the eye play in seeing?
*May 11, 2010*

**6th grade**

If today is Tuesday, what integer stands for last Sunday?
*May 4, 2010*

**psychology**

How do various behaviors of social dominance and courtship display affect the evolutionary process?
*April 17, 2010*

**Pre-calc-urgent**

How do you find a formula for f(x) and g(x) if h(x)=f[g(x)] h(x)=(2x^3-5)^4
*April 15, 2010*

**chemistry lab titration**

Are the pH's at 5mL, 15mL, and 25mL equal the respective pKa's (11.60, 6.77, and 2.25) since they are all half-equivalence points?
*April 7, 2010*

**math 10 general math**

what is the yield for 8.5% compound continously?
*April 4, 2010*

**math**

What is a generalization for this set of polygons: square, hexagon and a pentagon
*February 1, 2010*

**10th grade**

The question is asking you what you'all did there?
*January 21, 2010*

**Physics**

I'm sorry, but that doesn't make sense to me, is there any other way you can explain it? Thanks.
*January 20, 2010*

**Physics**

A stationary billiard ball, mass 0.17 kg, is struck by an identical ball moving at 2.7 m/s. After the collision, the second ball moves off at 60° to the left of its original direction. The stationary ball moves off at 30° to the right of the moving ball's original ...
*January 20, 2010*

**biology**

I believe that it is A
*January 20, 2010*

**math**

So you need to make two equations, and then use substitution. I used A for the larger number and B for the smaller: A=B+5 4A+3B=97 Then you plug in (B+5) for A in the second equation... 4(B+5)+3B=97 4B+20+3B=97 7B+20=97 7B=77 B=11 A=5+11 A=16
*January 20, 2010*

**3rd grade math**

1600
*January 4, 2010*

**algebra**

what is n/15=120
*December 5, 2009*

**math**

CAN YOU SHOW ME THE QUICKEST WAY TO DO ALGEBRA
*November 24, 2009*

**math**

3X42
*September 10, 2009*

**psychology**

What task component distinguishes the Wechsler Scales from the SBIS?
*September 7, 2009*

**12th grade Biology**

followhich of the wing accurately shows the correct terms for the two sides of a chemical equation, correctly placed to the lelf or to the right where they belong ,and also shows the correct symbol that is written between them
*August 23, 2009*

**English - A lesson before dying**

what are two plot related titles and their pose or tone related title?
*August 10, 2009*

**college**

how to work symbolic representatios? i need to find the domain and range
*April 24, 2009*

**Chemistry**

there is a picture on google images... if you type in "crystal structure of lithium sulfide"......
*April 15, 2009*

**Chemistry**

The crystal structure of lithium sulfide (Li2S) is pictured here. The length of the unit cell is 5.88 x 10^2. For this structure, determine: a)the coordination number of Li and S b) the number of formula nunits in the unit cell c) the density of Li2S
*April 15, 2009*

**Chemistry**

The crystal structure of lithium sulfide (Li2S) is pictured here. The length of the unit cell is 5.88 x 10^2. For this structure, determine: (I could not paste the actual picture from the assignment here, but if you go to Google Image and type in "crystal structure of ...
*April 14, 2009*

**Physics: Electricity and Magnetism**

Four charges on a rectangle that is 6 cm by 3 cm. All but one of the corners has a positive charge. The magnitudes of the charges are all 8.40e-12 C. What is the net electric field at the center of the rectangle?
*April 10, 2009*

**algebra 1b**

i need to know how to solve certain problems like this 4x=2y-10 x+2y=5 i need examples of this and shown to me step by step
*March 21, 2009*

**Psychology**

I haven't watch that movie before, do you mind telling me exactly which part relates to memory and learning? I tried to find it in youtube, but not sure which part. thanks!
*March 12, 2009*

**Psychology**

This is a homework assignment for my Psychology course on Memory and learning. Find a Movie/video clip (1-3 mins)that demonstrate a concept / phenomenom relevant to learning and memory? My prof used Matrix (what we see is just our neuron firing) and Bourne Idenity(amnesia)for ...
*March 12, 2009*

**Englsih**

This is one of my english homework. Can someone have a look at it and give me some suqqestions. Thank you. The Summary of English Grammar defines the major word-classes in terms of meaning rather than structure. By references to any one of the major wordclasses state the ...
*March 9, 2009*

**English**

My other friend with the same assignment put dual for all of them.
*March 9, 2009*

**English**

YesYes. The question original is: Indicate the case, person, number and gender of the bracketed words. I only have trouble with indicating the gender. Thanks!
*March 9, 2009*

**English**

Indicate the gendr of the bracketed words. I tired them but I am not sure am I right or not. Please look over it and give me suggestion if they are wrong. Thank you!! (They) told the (children) the (stories) they had heard (themselves). They - collective children - collective...
*March 9, 2009*

**simple math**

it can yujuytufjurjrngdjhdfgknbijnnbgk bnbniojgoigmnio bgiokmihklninklgdb
*February 16, 2009*

**English**

I have did the corrections for my english homework I posted a few days ago. Can someone check it over again and give me some suggestion if they are still wrong. Thank you!! Identify the phrase in the sentence below, and name the kind and function of each phrase. a)Having had a...
*February 7, 2009*

**English**

This is my english assignment, hope someone will look over it for me!! Thanks Identify the phrase in the sentence below, and name the kind and function of each phrase. a)Having had a good season, they hoped to win the trophy. having had a good season: participial to win the ...
*February 4, 2009*

**BUS 210**

This isn't that hard, just read the f*ing chapter
*December 3, 2008*

**Math**

did u say divide 6 3times
*December 2, 2008*

**3rd grade**

The Pilgrims were seeking freedom
*November 18, 2008*

**chem**

how do i calculate the concentration of F ions using pH in ppm
*November 16, 2008*

**Statistics**

Assume that men constitute 49% of population in a country. Assume also that among men there are 5% of color-blinded. Find the proba- bility that a person chosen at random is a color-blinded man.
*November 14, 2008*

**Chem**

find pH of 0.050 M HCLO4 plus 0.050 M HBr> You must consider activities>
*November 12, 2008*

**math**

the edges of a cube are 3 inches long. what is the surface area, in square inches, of this cube?
*November 9, 2008*

**health**

the main reason you should rduce your intake of eggs is because egg yolks
*October 28, 2008*

**math**

Is the following set of numbers a perfect triple? 13, 15, 18 Why are they, or why not
*October 27, 2008*

**chemistry**

What does the statement the properties of salt are different from the properties of elements that go into making them mean
*October 13, 2008*

**Math word problem**

I am having problems with this part: add the equations... 33+63)km/time=64km/hr then time= 96/64 hr (I know this is 1.5) Now solve for speed of wind in the first equation.. (is it 33km/1.5 =22) 33km/time=32km/hr-speedwind.
*October 12, 2008*

**Math word problem**

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind? I don't understand any of the responses. You have to assume in this case the wind retards and assists with the same ...
*October 12, 2008*

**Help**

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind?
*October 12, 2008*

**MATH**

WHAT ARE THE BEST WAYS TO STUDY FOR MATH TEST...
*September 19, 2008*

**physics**

at 10:15 am, Snail 1 crossed the 65-cm mark with a velocity of 4cm/min. in a great burst of energy, snail 1 raced to the 90-cm mark in 3 minutes. his velocity as he crossed the 90-cm mark was 7 cm/min. what was the acceleration of snail 1?
*September 18, 2008*

**11th grade**

your pet dog runs around in circles, chasing his tail. Does this mean acceleration?
*September 18, 2008*

**biology**

if boron has 5 protons in its nucleus how many neutrons are there?and how many electrons? what if b-7 was an isotope how many nentrons are present in this atom? thanks for your help
*August 4, 2008*

**Pre calc**

How do you write a quadratic equation in standard form for a given set of zeros?
*August 2, 2008*

**science**

what is a flatcurved surface called
*July 9, 2008*

**history**

Nixon's policy of "engagement" with the Communists was called detente. Rather than military confrontation, Nixon championed diplomatic conversations. Nixon ended the Vietnam war, went to Red China, and started the nuclear arms reduction treaties. Nixon's ...
*July 2, 2008*

**algebra**

i figured it out :)
*June 12, 2008*

**algebra**

If y varies jointly with x and z, and y=24 when x=3 and z=2, then the value of x when y=6 and z=0.5 is 12 6 1 3 1/3
*June 12, 2008*

**ecology**

what part of the plant absorbs the most water?? Is it the stem?
*May 27, 2008*

**CRITICAL THINKING**

not sure
*April 3, 2008*

**math**

Thank you.
*March 6, 2008*

**math**

How would I find the a for the equation y= a(x-h)^2+k. I'm looking at a graph, and I can solve for everything except for a. What is it supposed to be?
*March 6, 2008*

**U.S. History**

What were the key arguments for and against U.S. imperialism during the Spanish American War??
*March 2, 2008*

**molarity**

what mass of sodium hydroxide, NaOH, must be dissolved to make 460 ml of a 1.10 M solution
*February 27, 2008*

**english**

the subjuect of a sentence may be what parts of speech?
*February 12, 2008*

**math Thanks to everyone for the help it's needed!**

what would be the radius of a circle with a diameter of 8 inches?
*February 12, 2008*

**math**

what is the average of 132,145,140,128? do u add them all togher then divide ? or just add them and get the answer?
*February 12, 2008*

**math**

robert bought a used car for $1,500.00 if the sales tax is 5% what is the total that he paid?
*February 12, 2008*

**math**

2/3+4/6+?
*February 12, 2008*

**math its been years since school**

a cube measures 3 inches on all its sides. Wgat is its volume in inches?
*February 12, 2008*

**math**

what is the perimeter of a triangle which sides mesure 6,8,and 10 inches?
*February 12, 2008*

**geometry**

what is the area of a rectangle with a width of 12 feet and a length of 10?
*February 12, 2008*

**math**

1 pie with diameter of a to b then radius of top to bottom half of c to o the chord is angle cob right. the questions are a. which chord is not a diameter b. name a central angle that is a right angle c. name a inscribed angle
*December 3, 2007*

**math**

8/9 x 1 1/5 x 10
*December 3, 2007*

**science**

Why does covering and refrigerating food help reduce spoilage from mould?
*November 3, 2007*

**physics**

If the filliament resistance in an automobile headlamp is 3 ohms, how many amps does it draw when connected to a 12 volt battery? I got 36 watts? would I divide 12 volts/3 ohms= 4 amps
*October 25, 2007*

**physics.**

please check my answers. when a lamp is plugged into a 120 V socket, each coulomb of charge that flows in the circuit is raised to a potential engergy of 120 joules? which offers more resistance to water flow, a wide pipe or narrow pipe? I got wide as my answer. Similarly ...
*October 25, 2007*

**math**

I am havnig a problem understanding the rules of long division with decimals can you explain
*September 10, 2007*

**Math**

Factor pairs
*August 29, 2007*

**Math(Factoring)**

x^2+4 x^2+4 = (x + 2 i) (x - 2 i) Wouldn't you need a value for x? Or do u just have to make an expression? An expression for this example would be xx+4 O never mind my answer was incorrect. Sorry about that.
*June 29, 2007*

**Factor:**

x^2+4
*June 29, 2007*

Pages: <<Prev | 1 | 2 | 3 | 4 | **5** | 6 | Next>>