Wednesday

January 18, 2017
Total # Posts: 1,093

**Physics**

the ski boat is traveling at 15 m/s and the tension in the rope is 80 N. If the boat does 3500 J of work on the skier in 54.6 m, what is the angle between the tow rope and the center line of the boat?

*March 9, 2010*

**Physics**

Initially sliding with a speed of 2.3 m/s, a 2.0 kg block collides with a spring and compresses it 0.41 m before coming to rest. What is the force constant of the spring?

*March 9, 2010*

**Pre-Cal**

1) Use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees 30'

*March 9, 2010*

**Pre-Cal(Please help)**

Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.

*March 6, 2010*

**Pre-Cal**

Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.

*March 6, 2010*

**physics**

79622?

*March 3, 2010*

**Physics**

Jill of the Jungle swings on a vine 7.0 m long. What is the tension in the vine if Jill, whose mass is 65 kg, is moving at 2.3 m/s when the vine is vertical?

*March 2, 2010*

**Physics**

When you take your 1200 kg car out for a spin, you go around a corner of radius 51 m with a speed of 12 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?

*March 2, 2010*

**MATH**

Elsie is starting a recycling club at her school and hopes to use the money earned from recycling cans to buy recycling bins for the school. Elsie first needs to figure out how much the cans that can be collected at her school will weigh, so she starts by weighing the cans in ...

*March 2, 2010*

**math**

The recycling center pays 25 cents per kg for aluminum cans. If her school recycles 2070 cans each day, how much money will Elsie earn each day by recycling?

*March 2, 2010*

**Pre-Cal**

1) My last question was wrong. The question should read: Fill in the blanks As x --> pi+, sin x --> ? and csc x --> ? I do not understand this!

*February 28, 2010*

**Pre-Cal**

Error. Im sorry the question is As x --> pi+, sin x --> ? and csc x --> ?

*February 28, 2010*

**Pre-Cal**

1) Fill in the blanks As x --> pi^2, sin x --> ? and csc x --> ? I do not understand this!

*February 28, 2010*

**Math(Please check)**

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees. Would I use the forumula cos(pi/2 - Q) = sin Q

*February 28, 2010*

**Math(Please check)**

Error

*February 28, 2010*

**Math(Please check)**

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees.

*February 28, 2010*

**chemistry**

What would be happening in this reaction? 2Ag^+(aq) + CO3^2-(aq) + HNO3 (aq) -----> 2AgNO3(s) + H20(l) + CO2(aq)

*February 26, 2010*

**chemistry**

Confused

*February 25, 2010*

**Pre-cal**

1) Solve the equation sinx(sinx+1) = 0 I am having trouble with the first step. Could I do sin x^2 + 1 =0?

*February 23, 2010*

**Physics**

A child goes down a playground slide with an acceleration of 1.24 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 32.0 degrees below the horizontal.

*February 23, 2010*

**Physics**

A farm tractor tows a 3800-kg trailer up a 19 degrees incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer? (Ignore friction.)

*February 22, 2010*

**Pre-Cal(Urgent!!)**

Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.

*February 20, 2010*

**Pre-Cal**

Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.

*February 20, 2010*

**Math**

1) Find the angle of depression from the top of a lighthouse 250 feet above water level to the water line of a ship 2 miles off shore. arc tan 10560/250 = 88.64 ft Is this correct? 2) A passenger is in an airplane flying at n altitude of 10 kilometers sees two towns directly ...

*February 18, 2010*

**Physics**

A swimmer runs horizontally off a diving board with a speed of 3.14 m/s and hits the water a horizontal distance of 2.16 m from the end of the board. How high above the water was the diving board?

*February 16, 2010*

**Physics**

A cork shoots out of a champagne bottle at an angle of 39.0 degrees above the horizontal. If the cork travels a horizontal distance of 1.10 m in 1.40 s, what was its initial speed?

*February 16, 2010*

**Physics**

A soccer ball is kicked with a speed of 9.80 m/s at an angle of 25.0 degrees above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?

*February 16, 2010*

**Physics**

In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 25 m/s at an angle of 39 degrees above the horizontal. (a) How long does it take for the ball to reach the wall if it is 3.7 m away? (b) How high is the ...

*February 16, 2010*

**Physics**

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 25 degrees above the horizontal. It is released 0.75 m above the floor. What horizontal distance does the ball cover before bouncing?

*February 16, 2010*

**Pre-Cal(Please Help)**

1) For a person at rest, the velocity v (in liters per second) of air flow during a respiratory cycle is V = 0.85 sin pi(t)/ 3 where t is the time in seconds. (Inhalation occurs when v > 0 and exhalation occurs when v < 0) A) Find the time for one full respiratory cycle ...

*February 12, 2010*

**MAth**

yuhh know what im asking yuhh guys okayy! nd i know what iht is im not stupid!

*February 10, 2010*

**MAth**

what do you call a person who buys and sells bugs?

*February 10, 2010*

**Physics**

I need to solve this equation. 3E -9 N / 1.25 E -19 C I do not know what to do with the -9 and -19.

*February 10, 2010*

**social studies**

why was the Spanish-American War important to America?

*February 10, 2010*

**social studies**

Why was Theodore Roosevelt an American Hero?

*February 10, 2010*

**science**

What organ receives pancreatic juices? What organ absorbs water and what organ, in animals, helps digest cellulose?? Please help me!!

*February 1, 2010*

**Physics**

1) The question asked to find the ionosphere reading for your area today and gives you s web site. I went on the website but I have no idea how to find the reading for West Palm Beach. Any suggestions?

*January 26, 2010*

**7th grade**

2/5 of 40 What is the formula to find this????

*January 11, 2010*

**Science**

How is the pH of a strong acid compared to a weak acid of the same concentration?

*January 10, 2010*

**math**

a bank teller had $2750 in 10 dollar bills and5 dollar bills he had twice as many10 dollar billsas 5 dollar bills how many of each bill does he have

*January 8, 2010*

**english**

1. might be going 2.did give

*January 8, 2010*

**wrighting**

I have to wright a report on the erely explors and evrything i wright dous not make sence

*January 7, 2010*

**5th grade**

come up with some ideas first

*January 7, 2010*

**Ancient Rome**

How did Roman conquests overseas affected Rome's development in the past?

*December 15, 2009*

**science**

What are the seven energy levels and tell the maximum number of electrons that can fit in each.

*December 8, 2009*

**social**

what are two actions outlawed by the english bill of rights?

*December 2, 2009*

**social**

according the the english bill of rights, how is freedom of speech protected?

*December 2, 2009*

**History**

Comparing the different diplomacy styles of Prestidents Roosevelt, Taft, & Wilson, Roosevelt beheved the U.S. should respond to foreign crises, not by threats, but by military action, thus, the "big stick" approach. Taft hoped to modifty the American foreign policy ...

*November 30, 2009*

**History**

Compare the different diplomacy styles of Presidents Roosevelt, Taft, and Wilson.

*November 30, 2009*

**MATH**

Jones Company had 100 units in beginning inventory at a total cost of $10,000.The company purchased 200 units at a total cost of $26,000. At the end of the year, Jones had 80 units in ending inventory. Compute the cost of the ending inventory and the cost of goods sold under (...

*November 30, 2009*

**science**

A 2.7 kg box is released on a horizontal surface with an initial speed of 2.9 m/s. It moves on the surface with an acceleration of .27 m/s squared. Calculate the kinetic friction force on the box. The coefficent of the kinetic force is .156.

*November 24, 2009*

**math**

Over the past two weeks, Jane earned $292 and $193 respectively, at her part time job. What must she earn in the third week to bring her three-week average earnings to $200 per week?

*November 22, 2009*

**Science**

What is it caled when... A family of unreactive elements whose atoms do not gain, lose, or share valence electron

*November 19, 2009*

**world history**

true or false if false why hindus believe that souls are born and reborn many times each time into a new body which is a process called reincarnation

*November 19, 2009*

**history**

Why were American political leaders so interested in the Pacific islands in the late 1800's?

*November 16, 2009*

**5th grade**

the gcf can not be lower than 16

*November 13, 2009*

**chemistry**

in the lab of reaction with copper copper is suppose to loose mass because it oxidates. its that right or does it gain mass thanks

*November 13, 2009*

**chemistry**

when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide what is the mass of oxygen that has combined with the copper? how much copper must be heated to form 300 grms. of copper oxide?

*November 13, 2009*

**math**

8 m _____________ |\ | 4 m | \ Garden| | \ | | floor \ | -------------- 8m I need help finding the area of the garden and the area of the floor. so please give me in full explanation.

*November 9, 2009*

**math**

8 m _____________ |\ | 4 m | \ Garden| | \ | | floor \ | -------------- 8m I need help finding the area of the garden and the area of the floor. so please give me in full explanation.

*November 9, 2009*

**math**

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 H E W S A E D A 17 18 19 20 21 22 G A

*November 5, 2009*

**7th grade**

It is Olay but it took me a whole hour to figure it out I'm like the worst at math. ✏✏✏📙📙📙

*October 21, 2009*

**math**

ok figure 1 has one block figure 2 has 5 block and figure 3 has 9 block what would the 100th figure be

*October 19, 2009*

**math**

but what would the 100th figure be

*October 19, 2009*

**math**

ok figure 1 has one block figure 2 has 5 block and figure 3 has 9 block whats the pattern

*October 19, 2009*

**history**

how did the lives of slaves differ from those of the free in the united states

*October 19, 2009*

**history**

how did the lives of slaves differ from those of the free in the united states

*October 19, 2009*

**s.s**

what is the proclamation?

*October 12, 2009*

**7th grade math**

last weekend,alans basketball team played in a tournament. alan scored 1/5of the teams points,his friend jake scored 30% of the teams points. what fraction of the teams points were scored by alan and jake?

*October 3, 2009*

**math**

bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435

*October 1, 2009*

**math**

bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435

*October 1, 2009*

**math**

susan is buying three different colors of tiles for her kicthen floor. she is buying 25 more red tiles than beige tiles , and three times as many navy-blue tiles as beige titles. if susan buys 435 tiles altogher, how many tiles of each color does she buy?

*October 1, 2009*

**Pre-Algebra**

Is any one there??

*September 15, 2009*

**Pre-Algebra**

So where does every one go to school?

*September 15, 2009*

**Pre-Algebra**

Thank you soooo! much! this saved me like LOADS of time! and my teacher just asks "did you do your home work!" haha! oh well! :)

*September 15, 2009*

**Science**

thank you!

*August 31, 2009*

**Science**

What are some examples of chemical changes?

*August 31, 2009*

**algebra**

-60rs/204rs Simplify

*July 12, 2009*

**math**

-2

*June 8, 2009*

**science**

what is a bird in science terms

*May 9, 2009*

**math**

how would you solve for x: (e^(x)+e(-x)/2)=3

*May 3, 2009*

**history**

what factorwas the most imoprtant in improving health and medicine

*April 20, 2009*

**Algebra 2**

solve and graph the inequalities y >=xsquared y<=x squared =3

*March 11, 2009*

**writing**

i have to unscrammble this word. the letters are eihmlyebt the question that comes with it is if this sign is on my dressing room door what am i?

*February 25, 2009*

**science**

Support how a vaccine can help prevent an infectious disease. Please Help!!

*February 24, 2009*

**Science**

Support how a vaccine can help prevent an infectious disease.

*February 24, 2009*

**math**

There would be 32 because 8 pigs = 1/4 of your answer. So 8 times 4 = 32 :)

*February 4, 2009*

**social studies**

thanks!!

*January 20, 2009*

**social studies**

what is a symbol used in writing?

*January 20, 2009*

**Math**

Aflyerquacker

*January 5, 2009*

**7th grade (General_**

Ok, I really like taking random notes but my teacher hates the fact that I do. She says I need to pick a note style. What style is similar to random but has something.

*January 5, 2009*

**Math**

I need help with that too i know the answer but need the stupid work shown. So how do you show the work?

*December 11, 2008*

**algebra**

can someone please help me with this? :) paul edros's first article was published in 1932. in 2003, 1521 articles on which he had worked had already been published. on average, how many of edros's articles were published each year from 1932 and 2003?

*December 1, 2008*

**psychology**

When an individual feels that both health and illness are a product of psychological, biological, and social forces he or she believes in the - Biomedical model - Western Perspective Model - Biopsychosocial model - Scientific approach to medicine - Primary medicine perspective...

*November 19, 2008*

**AP math how to word my answer no equations**

The problem states that I have to come up with best possible predictor of a 100yr flood plan. Well I found that best projection and I have to state why. Could I say: The projection from the power trend line is a better indicator because with the probability of 0.9638 this ...

*November 17, 2008*

**History**

What was the main premise of the Federalist 15?

*November 15, 2008*

**History**

What were the pen names of the authors of the Federalist papers? Why did they go by these names?

*November 15, 2008*

**earth science? volcanoes my thoughts**

Iceland: shield, cones, stratovolcanoes, calderas Chile and Argentina: stratovolcanoes The Arabian Peninsula and the Middle East: not too sure

*November 10, 2008*

**earth science? volcanoes**

what kind of volcanoes are found in Iceland? Chile and Argentina? The Arabian Peninsula and the Middle East? thanks

*November 10, 2008*

**English/Grammar**

I have a comma question! When using the phrase "as well as" do i put the comma before, after, or before AND after the phrase. An example sentince is: At the store i bought milk as well as bread.

*November 8, 2008*