Wednesday

May 27, 2015

May 27, 2015

Total # Posts: 2,625

**physics**

A ball of mass m = 0.75 kg is thrown straight upward with an initial speed of 8.9 m/s. Plot the gravitational potential energy of the block from its launch height, y = 0, to the height y = 5.0 m. Let U = 0 correspond to y = 0. Determine the turning point (maximum height) of ...
*February 13, 2011*

**geometry**

What Is The Area Of A Circle If The Radius Is 10 Inches?
*February 11, 2011*

**art101**

1. CheckPoint: Greek and Roman Architecture • Resource: Ch. 15 of A World of Art • Write a summary comparing the characteristics and innovations of each Greek and Roman architecture in 200 to 300 words. • Provide two representative examples of architecture for ...
*February 11, 2011*

**College Electric Physics **

(a) What is the electric potential energy in joules of two electrons separated by 1.98 nm? (b) What would be it be if the separation was doubled?
*February 11, 2011*

**Physics**

A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest of the race at a constant speed. If the race is 100 m, how much time does the sprinter take to fi nish the race?
*February 11, 2011*

**Algebra**

What is the area of a circle whose diameter is given by the expression 10x?
*February 8, 2011*

**math**

Forrest Lumber uses the function S(t) = -75t + 375 to determine the salvage value S(t), in dollars, of a table saw t years after its purchase. How long will it take the saw to depreciate completely?
*February 7, 2011*

**math**

Samantha can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?
*February 7, 2011*

**English 1**

tgfrvh,ki
*February 5, 2011*

**English 1**

do your own work
*February 5, 2011*

**math**

two girls caught 25 frogs. lisa caught four times as many as jen did. how many frogs did jen catch
*February 3, 2011*

**MATH **

a golf ball dropped onto a hard surface rebounds exactly 1/3 of the height from which it falls. how far will it rebound after hitting the surface for the third time if it initially dropped from a height of 18 feet
*February 3, 2011*

**math**

two girls caught 25 frogs. Lisa caught four times as many as Jen did. how many frogs did Jen catch
*February 3, 2011*

**math**

company claims 10% are green. suppose that candies are packaged randomly into samll bags of 50. school children studying percent open several bags, count colors and find the proportion that are green. a. is the Normal model appropriate here? explain b. where is the center? ...
*February 2, 2011*

**Science**

the candy nerds
*February 2, 2011*

**Science**

what about nerds
*February 2, 2011*

**math**

51/17
*February 2, 2011*

**algebra 1**

5m-m+8+=0
*February 2, 2011*

**Math**

simplify: 5-s(4-7)+3s show steps
*January 30, 2011*

**Chemistry**

If Kc = 0.143 at 25°C for this reaction, find the equilibrium concentrations of C6H12 and CH3C5H9 if the initial concentrations are 0.200 M and 0.075 M, respectively. a. [C6H12] = 0.041 M, [CH3C5H9] = 0.041 M b. [C6H12] = 0.159 M, [CH3C5H9] = 0.116 M c. [C6H12] = 0.241 M...
*January 30, 2011*

**Pre-Algebra**

I don't get it because the choices are A. 25 mins B. 35 mins C. 85 mins D. 1500 mins
*January 30, 2011*

**Pre-Algebra**

Cheng drives 25 miles on a highway at a constant rate of 60 miles per hours. Jow much time does the trip take?
*January 30, 2011*

**math**

n + (n + 1) + (n + 2) =45
*January 29, 2011*

**computers**

When you press the power button on your computer, it doesn’t turn on. There is nothing…silence…absolute zero. There are no beeps, no whistles, nothing. The monitor is getting power and the power strip is turned on. 1.Draw a diagram of the wiring scheme based on ...
*January 27, 2011*

**algebra**

The force of gravity is inversely proportional to the square of the center of the earth. if you weigh 120 lbs on the surface of the earth, how much would you weigh 250 miles above the surface? (Earth's radius = 4000 miles)
*January 27, 2011*

**4th grade math**

38 is the answer
*January 26, 2011*

**science**

object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
*January 25, 2011*

**science**

object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
*January 25, 2011*

**Math**

3p^2+4P^2=63
*January 23, 2011*

**Math**

3p^2+4P^2=63
*January 23, 2011*

**math**

3p^2+4P^2=63
*January 23, 2011*

**Math**

The distance between the points (14,-18) and (15,-8) is? The point (a,b) is such that (14,-18) is the midpoint of the segment from (15,-8) to (a,b). Then a and =?
*January 23, 2011*

**chemistry**

Nevermind, the correct answer was at the top of the next page so I didn't see it.
*January 21, 2011*

**chemistry**

Nope, it was 10 degrees C, which is why I'm stumped. I didn't think any of the answer choices were right, either.
*January 21, 2011*

**chemistry**

Which of the following constants are needed to calculate the change in enthalpy (H) for heating a sample of liquid water at 10C to steam at 150C. I) the heat capacity of water II) the enthalpy of fusion of water III) the heat capacity of ice IV) the enthalpy of ...
*January 21, 2011*

**chemistry**

thanks
*January 21, 2011*

**chemistry**

I think that's what I'm looking for.
*January 21, 2011*

**chemistry**

I, IV and V only 005 10.0 points When a chemical reaction comes to equilibrium, both the forward and the reverse reactions continue, but their rates are equal. For such a system at equilibrium at 300 K and 1.00 atm pressure, the change in Gibbs free energy as the forward ...
*January 21, 2011*

**math**

if a triangle has side lengths of 6cm, 9cm and x cm, what are possible values for x?
*January 20, 2011*

**physics**

I'm sorry I meant 1.5J
*January 18, 2011*

**physics**

The answer is 15J
*January 18, 2011*

**MATH**

A is the midpoint of BC. BA=2x+5 and BC=5x-3. solve for x and find the length of BC
*January 16, 2011*

**math**

Gloves down
*January 15, 2011*

**honors chemistry**

no, that is what i meant to type, that's just the question on my homework
*January 13, 2011*

**honors chemistry**

Which gas has solubility in water (at STP) of 3.39 L at 10.0°C?
*January 13, 2011*

**9th grade alegbra**

The sum of two numbers is 90.their difference is 18.find the numbers.
*January 11, 2011*

**science**

if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS
*January 11, 2011*

**Iron and Sulphur reaction**

iron+sulfur(or sulphur)=FeS
*January 10, 2011*

**math**

Dents and Dings Auto Body buys paint with a list price of $29,000. If the supplier extends trade discounts of 30/35/20, what is the trade discount amount?
*January 9, 2011*

**chemistry**

In one mole of the compound nitrogen diox- ide, what fraction of the total number of ions is the nitrogen ion?
*January 9, 2011*

**Math**

write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions
*January 7, 2011*

**math**

??????
*January 5, 2011*

**Physics**

A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 86 N parallel to the incline, which makes an angle of 30 ° with the horizontal. Assuming the coefficient of kinetic friction is 0.4 and the crate is pulled a distance of 7.5 ...
*January 5, 2011*

**trig**

what is the value of the discriminant x^2-9
*January 5, 2011*

**Physics 12th Grade**

Two girls with masses of 50.0 kg and 70.0 kg are at rest on frictionless in-line skates. the larger girl pushes the smaller girl so that the latter rolls away at a speed of 10.0 m/s. What is the effect of the action on the larger girl? What is the impulse that each girl exerts...
*January 5, 2011*

**chemistry**

A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.4 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
*January 3, 2011*

**Geometry**

Find the surface area of a right octagonal pyramid with height 2.5 yards, and its base has apothem length 1.5 yards.
*December 30, 2010*

**Physics**

990 N
*December 29, 2010*

**GENERAL ART**

HOW DO YOU DRAW 3 D BOXES
*December 21, 2010*

**7th Pre-Algebra Word Problem**

Thanks
*December 20, 2010*

**7th Pre-Algebra Word Problem**

Approximately one-seventh of the people in the United States are left-handed. The population of the United States is about 300 million. Write and solve an equation to estimate howmany people in the United States are left handed.
*December 20, 2010*

**Physics**

Two brothers are jogging, Josh and Drake. Josh has 1/2 the KE of Drake. Also, he is twice the mass of Drake. Plus, Josh had to increase his speed by 1.35 meters/second to achieve the same kinetic energy of Drake. What is the initial velocity?
*December 18, 2010*

**Math**

prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
*December 17, 2010*

**math**

find three rational numbers between the negtive square root of 26 and the negtive square root of 15 and explain how you got the answer
*December 17, 2010*

**Math**

prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
*December 16, 2010*

**high school**

1400n
*December 16, 2010*

**math**

Find the range of possible measures if each set of expressions represents measures of the sides of a triangle:x 2x+10, x+8
*December 16, 2010*

**Language arts**

Figurative language
*December 15, 2010*

**geometry**

Write and solve an inequality to find the calues of x for which the area of the rectangle is greater than the are of the triangle
*December 15, 2010*

**11th grade**

20xsquared+40 x+15=0
*December 13, 2010*

**algebra **

Thanks
*December 13, 2010*

**algebra **

10-d=19 What is d? I think it is -9.
*December 13, 2010*

**Physics**

6000
*December 11, 2010*

**math**

how do you solove I=$440 P=??? R=7% T=4 years
*December 9, 2010*

**7th grade**

i need help with another I=$440,P=??,R=5%,T=4 years what is p
*December 9, 2010*

**7th grade**

thank you
*December 9, 2010*

**7th grade**

I=$440 P??? R=7% T=4years this is simple interest
*December 9, 2010*

**7th grade**

i need help with simple interest math homework.NOW!
*December 9, 2010*

**History**

dont go down really dont go i mean it
*December 9, 2010*

**Finance**

The extent to which inventory financing may be used depends on
*December 9, 2010*

**finance**

At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis.
*December 9, 2010*

**trig**

solving radical equations... help! 5+¡în+1= n+4
*December 8, 2010*

**Math**

12 Quarters 7 Dimes 3 Nickels
*December 7, 2010*

**Math**

12 quarters 7 dimes 3 nickels
*December 7, 2010*

**Math question**

pi*r^2 3.14*20cm.^2 =1256.63 take that and divide by four and you get 314.16
*December 7, 2010*

**physics**

I have a capacitance of 5.75e-10 What is it in Farads?
*December 7, 2010*

**pre algebra 6th grade**

250=x-.08x 250=(1-.08)x 250/(1-.08)=x 271.73=x
*December 7, 2010*

**algebra**

x=4 y=2 perimeter= (2*4)+(2*2) = 8+4 =12
*December 7, 2010*

**Physics**

I need help solving for q. Here is the formula. F=(k*q*2q)/r^2
*December 7, 2010*

**Geometry**

h=(2A)/B =(2*6.75)/3 =4.5 m
*December 7, 2010*

**bio 102**

assuming the standard values for the atmospheric partial pressure of N2, O2, AND CO2 at sea level, what is the approximate total partial pressure of the remainig atmospheric gases?
*December 7, 2010*

** Chemistry**

0.500 moles of NOCl is placed in a 1.00L vessel at 700K,and after the system comes to equilibrium,the concentration of the NOCl is .440M. Calculate the value of Kc for the reaction @NOCl(g)->2NO(g)+Cl2(g)?
*December 6, 2010*

**math**

what is the ascending order of 8+7x^2-12x^3-4x^3y
*December 6, 2010*

**chemistry**

What is the formula for the compound formed when potassium reacts with nitrogen?
*December 6, 2010*

**science**

A 75-kg person on skis is going down a hill sloped at 30.0°. The coefficient of kinetic friction between the skis and the snow is 0.15. How fast is the skier going 10.0 s after starting from rest?
*December 5, 2010*

**algebra**

A*B=A*B Solve for B
*December 5, 2010*

**physics**

A 65 kg person runs with a horizontal velocity of 3.5 m/s and jumps onto an 0.9 kg skateboard which is initially at rest. Assuming negligible friction, what will be the final velocity of the skateboard and the person?
*December 3, 2010*

**physics**

An 85.0 kg fisherman decides to jump from his boat onto the dock. If the velocity of the fisherman is 4.30 m/s to the west and the boat is 185 kg, what is the velocity of the boat after the fisherman jumps out?
*December 3, 2010*

**physics**

A billiard ball traveling at 8.0 m/s has an elastic collision with a second billiard ball of equal mass that is at rest. After the collision, the first ball is at rest. What is the velocity of the second ball after the collision?
*December 3, 2010*