Wednesday

September 17, 2014

September 17, 2014

Total # Posts: 1,510

**Physics**

A crate of mass m = 31 kg rides on the bed of a truck attached by a cord to the back of the cab as in the figure. The cord can withstand a maximum tension of 82 N before breaking. Neglecting friction between the crate and truck bed, find the maximum acceleration the truck can ...
*October 9, 2012*

**physics**

Betty Bodycheck (mB = 51.4 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 42.4 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*October 8, 2012*

**please help!**

I'm having trouble with this word problem. Two friends Jodi and Abe go horseback riding on the same trail in the same direction. Jodi's horse travels at 5 miles per hour while Abes horse travels at a slower pace. After 2 hours they are 2 miles apart. Find Abes horse ...
*October 5, 2012*

**math**

to estimate how many more people live in Atherton than Needles, which is closer to the exact answer: rounding to nearest hundreds or thousand
*October 4, 2012*

**Is this right? **

I have to determine the slope and y- intercept of this equation then graph 4x=6y+9 so I ended up putting it in y-mx+b form and it was 6y=4x+9 so slope is 4x and y intercept is 6y? How would I graph it though?
*October 3, 2012*

**math**

use the orden of operation and the digit 4 four time to write problems that have the following answers 44
*October 1, 2012*

**Math**

Expression for the square of one more than a number
*October 1, 2012*

**Math**

-8(t-3)-(t+1)=6
*September 24, 2012*

**Physics**

A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.20 s for the ball to reach its maximum height.
*September 21, 2012*

**Physics**

A ball is thrown vertically upward with a speed of 15.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the ...
*September 21, 2012*

**Physics**

In 1865, Jules Verne proposed sending men to the Moon by firing a space capsule from a 220-m-long cannon with final speed of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during their launch? (A human can stand an ...
*September 21, 2012*

**Physics**

A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 205 mi/h in 3.00 s. (a) Find the average acceleration of the plane. (b) Assuming the acceleration is constant, find the distance the plane moves.
*September 21, 2012*

**Physics**

The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 59.1 miles per hour?
*September 20, 2012*

**Physics**

A tortoise can run with a speed of 0.13 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 4.0 minutes. The tortoise wins by a shell (35 cm). (a) How long does the race take? (b) What is the length of the race?
*September 20, 2012*

**Physics**

A motorist drives north for 40.0 minutes at 61.5 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.70 h. (a) What is his total displacement? (b) What is his average velocity?
*September 20, 2012*

**Math**

1.d 2.a 3.c 4.b
*September 13, 2012*

**science**

I need helping locating information about the environment of Costa Rica so that I can analyze data about the country.
*September 9, 2012*

**HSM/270**

Last few weeks of class and struggling to keep up to graduate, can somebody help me if they have done this before, also i used the PEACE Program for my assignments in this Grant Proposal and Writing class. Thanks Identify where the program planning and evaluation process can ...
*September 8, 2012*

**english**

Was this answer correct?
*September 7, 2012*

**math**

What are the step to help solve for 5r+30/20= 3r-36/3
*September 7, 2012*

**math**

How to write the ration as a fraction in lowest terms. Compare in hours. 22 hours to 3 days. The ratio is __.
*September 7, 2012*

**math**

The distance between city A and city B is 500 miles. On a certain wall map, this is represented by a length of 2.3 feet. On the map, how many feet would there be between city C and city D, two cities that are actually 800 miles apart? On the map, city C and city D are ___ feet...
*September 7, 2012*

**math **

If 5 sweaters cost $39.40, how much would 8 sweaters cost? The cost is $__.
*September 7, 2012*

**math**

Write the ratio as a fraction in lowest terms. compare in inches. 3ft to 31 inches. The ratio is__.
*September 7, 2012*

**math **

The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is __degrees.
*September 7, 2012*

**math **

If planet I is 31.8 million miles from the sun than planet II, then planet III is 25.6 million miles father from the sun than planet I. When the total of the distances for these three planets from the sun is 200.2 million miles, how far away from the sun is planet II? Planet ...
*September 7, 2012*

**math**

An electrician cuts a 26ft piece of wire into two pieces. One piece is 4ft longer than the other. How long are the pieces? What is the length of the shorter piece?__ft
*September 7, 2012*

**Comunication Skills**

Cultural history.
*September 7, 2012*

**Math**

Evaulate each expression: (-1/8)^1/3 Would you make it 3 square root of -1/8? I don't know how to go from there. (256/81)^1/4 Same thing, would it become 4 square root (256/81)?
*September 6, 2012*

**Math**

Factor out the common factor: −3x^4 y^2 + 18xy^3 + 9xy^4
*September 5, 2012*

**Math**

Factor the trinomial: 2x^2 +11x - 63
*September 5, 2012*

**ENGLISH**

yup! all were right! thanks so much!!:)
*September 5, 2012*

**Algebra**

The first two please
*August 30, 2012*

**Algebra**

please help me solve my homework with all the work involved. i have trouble paying attention in class so it's hard for me to do my homework. here are a few of the questions. I need to find out what the letters equal. 1.) 10(-4+y)=2y 2.)9(b-4)-7b=5(3b-2) 3.)-(8n-2)=3+10(1-...
*August 30, 2012*

**Math.**

A spinner is divided into 8 equal sections. There are 3 yellow sections and 5 green sections. The spinner is spun 32 times. Which proportion can be used to find the number of times, B, that the spinner could be expected to land on a green section?
*August 23, 2012*

**English**

Opps I mean dedicate*
*August 10, 2012*

**English**

I am writing a paragraph about why I want to participate in this school counsil thing and I was wobderi if the word choice for "deticate" in this sentence makes sense: I want to deticate myself to participate in more school activities.
*August 10, 2012*

**English**

Is this sentence right? I have never had a pet before.
*August 9, 2012*

**Svience**

I'm just courious what "ragweed mix" is/are. Is it one type of plant or a bunch?
*August 9, 2012*

**history**

the construction of Levitt Towns
*August 9, 2012*

**stats 101**

how do you find the lower class limit,upper class limit, class width, class midpoint, and class boundaries from a set of frequencies data
*July 30, 2012*

**phisics**

Two positive charges, each of magnitude 2 10-6 C, are located a distance of 17 cm from each other. (a) What is the magnitude of the force exerted on each charge?
*July 24, 2012*

**health and diseases**

Im not sure how to do it? I need suggestions
*July 14, 2012*

**health and diseases **

I need help on doing a powerpoint presentation about trichomoniasis
*July 14, 2012*

**Chemistry**

I am stuck on this question: what mass of KCl in grams when 2.00 lbs KC10 3 is decomposed?
*July 14, 2012*

**anth**

why is anthropology necessary in a career/life?
*June 25, 2012*

**abnornal psych**

so what are the necessary reason for and aganist establishing a specific disorder related to suicide?
*June 18, 2012*

**abnornal psych**

should suicide be added to the DSM IV- TR and what are the reason for and aganist establishing a specific disorder related to suicide?
*June 18, 2012*

**Math**

If y is directly proportional to x and inversely proportional to z^2, by what value is y multiplied if x is doubled and z is multiplied by 3
*June 18, 2012*

**physics**

You have a mass of 71 kg and are on a 51-degree slope hanging on to a cord with a breaking strength of 165 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire? In the previous problem if the...
*June 16, 2012*

**College physics**

A skier traveling at 30.9 m/s encounters a 21.5 degree slope. If you could ignore friction, to the nearest meter, how far up the hill does he go?
*June 16, 2012*

**Physics**

I'm still a little confused. When I use the equation: W = k(x2^2 - x1^2)/2, I get 0.0216 J. This doesn't seem correct.
*June 2, 2012*

**Physics**

A spring with k = 54 N/cm is initially stretched 1 cm from its equilibrium length. (a) How much more energy is needed to further stretch the spring to 2 cm beyond its equilibrium length? (b) From this new position, how much energy is needed to compress the spring to 2 cm ...
*June 2, 2012*

**Chemistry**

Calculate the final pressure on the addition of 2.0 g He(g) to a vessel of 10.0 L fixed volume already containing O2(g) at 25°C and 740 mm Hg
*May 29, 2012*

**Learning through Play**

One of the parents in your school says, “I really enjoyed coming to Parents’ Night last week and seeing all the things the children are doing. I was particularly interested in your comments about the materials which enhance cognitive abilities. Why is it so much ...
*May 25, 2012*

**Calc- Trig Substitution **

integral of dx/square root(x^2-64) My answer is: ln (x/8 + square root(x^2-64)/8) +c is this right?
*May 25, 2012*

**physics**

A model of a helicopter rotor has four blades, each 3.40 {m} in length from the central shaft to the tip of the blade. The model is rotated in a wind tunnel at 580 {rev/min}. What is the radial acceleration of the blade tip, expressed as a multiple of the acceleration g due to...
*May 22, 2012*

**chemistry **

how many times a proton is heavier than an electron
*May 19, 2012*

**Math**

Write an addition problem in which, when the addends are rounded to the nearest ten, the sum is 90. Then explain how you use estimation to solve the problem.
*May 15, 2012*

**physics**

A skydiver jumps out of a hovering helicopter, so there is no forward velocity. Use this information to answer questions 1 to 9. Ignore wind resistance for this exercise. What is the skydiver's acceleration?
*May 11, 2012*

**functions 12**

after i solve for x then that is my answer? so x=1/3,-1
*May 8, 2012*

**functions 12**

so would it be (3sinx-1)(4sinx+4)=0?
*May 8, 2012*

**functions 12**

solve 12cos^2X=8+13sinX between the window of -360 ¡Ü x ¡Ü 360
*May 8, 2012*

**chemistry**

Why are hydrogen ions NEVER found in an aqueous solution?
*May 7, 2012*

**geometry**

the top of a giant slide is 30 ft off the ground. the slide rises at a 30 degree angle. to the nearst whole foot, what is the distance down the slide?
*May 5, 2012*

**Science**

I have a few questions if someone could please help with them: Which of the following is true: A.Relative dating tells us how long ago something existed B.Disconformities are less common but usually far more conspicuous because the strata on either side are essentially C....
*April 27, 2012*

**Chemistry**

A solution of .12 mol/L of phosphoric acid completely neutralizes .20L of a solution of sodium hydroxide with.a concentration of .15mol/L What is the neutralizing volume of the phosphoric acid?
*April 27, 2012*

**ethics **

I am doing a presentation on biomedical issues- abortion. My part is what issues involve problems with consent. Can you help please
*April 26, 2012*

**Earth Science**

Which of the following is true: -Relative dating tells us how long ago something existed -Disconformities are less common but usually far more conspicuous because the strata on either side are essentially -Estimates indicate that the North American continent is being lowered ...
*April 25, 2012*

**Maths lit,geography,life science,pysical science**

Help us plz
*April 23, 2012*

**Chemistry**

Are these right? I didnt know some of them. 1. AgNO3 Soluble, rule 3 2. Ag2SO4 Insoluble, rule 4 3. HgCl2 Insoluble, rule 2 4. BaSO4 Insoluble, rule 4 5. CaCl2 Soluble, rule 2 6. NH4OH ? 7. PbCl4 Insoluble, rule 2 8. Mg(C2H3O2)2 Soluble, rule 3 9. HgCl Soluble, rule 2 10. CaF2...
*April 23, 2012*

**Chemistry**

how do you determine the solubility of the following salts: 1. AgNO3 2. Ag2SO4 3. HgCl2 4. BaSO4 5. CaCl2 6. NH4OH 7. PbCl4 8. Mg(C2H3O2)2 9. HgCl 10. CaF2 11. CuO 12. AgI 13. Al(OH)3 14. Fe2(CO3)3 15. CrPO4 16. K2S
*April 23, 2012*

**Chemistry**

what are the rules used to determine the solubility of salt?
*April 23, 2012*

**Honors Chemistry**

1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12...
*April 19, 2012*

**Shurley English**

What are Single Quotes and when do you use them?
*April 17, 2012*

**Phsyics **

A cannonball is fired into the air with a speed of 42 m/s from a height of 28 m, with what speed does the cannonball hit the ground?
*April 16, 2012*

**physics**

An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
*April 15, 2012*

**Science**

The object distance for a convex lens is 15.0 cm, and the image distance is 5.0 cm. The height of the object is 9.0 cm. What is the height of the image?
*April 13, 2012*

**Math**

a.16 inches by 16 inches b.15 inches by 15 inches c.19 inches by 19 inches d.17 inches by 17 inches
*April 12, 2012*

**Math**

Janna is creating a multi-tiered cupcake display for a party. She plans on having 16 cupcakes on each tier. -There is a 1-inch space between all cupcakes. -The cupcakes have a uniform width [diameter] of 3 inches. -Each tier will display the cupcakes in either 2 rows of 8, or ...
*April 12, 2012*

**physics ! HELP PLEASE !!!!1**

what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?
*April 10, 2012*

**physcis ! HELP !!!! **

which of collowing situations describe a particle that might have a non-zero velocity? canbe more than one A) a particle that has a constant position as a function of time B) a particle that has its position changing as a fnction of time c)when you graph the particle's ...
*April 10, 2012*

**physics**

which of collowing situations describe a particle that might have a non-zero velocity? canbe more than one A) a particle that has a constant position as a function of time B) a particle that has its position changing as a fnction of time c)when you graph the particle's ...
*April 10, 2012*

**physics**

what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?
*April 10, 2012*

**World History**

because
*April 9, 2012*

**algebra**

Using the formula for BMI: B = 703(w)/ h² When the weight is 100 lbs and the BMI is 20, how do I figure out the persons height?
*April 9, 2012*

**physics**

An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What is the time if the...
*April 8, 2012*

**physics**

An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What is the time if the...
*April 8, 2012*

**physics**

i got answers to some of the questions Q1: 3.3 mins Q2: ?km <- still need help with Q3:23.3 Q4:?km still need help with
*April 8, 2012*

**physics**

An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What is the time if the...
*April 8, 2012*

**Science**

Identify 5 different materials that you encounter or use on a daily basis, and identify a mineral that is mined to supply each of those materials.
*April 5, 2012*

**Math**

Thank you for the help :)
*April 3, 2012*

**Math**

The Longhorns punted the ball from the 5-yard line. The punt was caught at the 41-yard line and returned to the 19-yard line. The ball did not cross the 50-yard line. What was the net yardage on the play?
*April 3, 2012*

**Physics Help!!!**

its wrong :/
*April 3, 2012*

**Physics Help!!!**

One of the 79.0 -long strings of an ordinary guitar is tuned to produce the note (frequency 245 ) when vibrating in its fundamental mode. Part A- If the tension in this string is increased by 3.2 , what will be the new fundamental frequency of the string? F= ? Hz i understood ...
*April 3, 2012*

**Physics Help!!!**

One of the 79.0 -long strings of an ordinary guitar is tuned to produce the note (frequency 245 ) when vibrating in its fundamental mode. Part A- If the tension in this string is increased by 3.2 , what will be the new fundamental frequency of the string? F= ? Hz i understood ...
*April 3, 2012*

**physics **

Two point charges are fixed on the y axis: a negative point charge q1 = -23 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.33 m. A third point charge q = +7.8 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other ...
*March 29, 2012*

**math**

A cylinder shaped sculpture is 24 meters high with a diameter of 6.8 meters. An artist plans to spray paint the entire surface with silver paint. If 1 can of spray paint covers 50 square meters, how many cans does the artist need to paint the sculpture?
*March 28, 2012*

**Chemistry III**

I'm sorry thank you so much for all your help but I seem to be getting the wrong answer for part c and I don't understand how to get the individual ion's moles for part b. I have the correct volume of 0.00197L. For part c I am doing as you say and I get a pOH of 5....
*March 27, 2012*

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