Saturday

February 28, 2015

February 28, 2015

Total # Posts: 567

**physics**

the water in a 0.5 km wide river is flowing at 5 m/sec from west to east. a man row a boat with a velocity of 13 m/sec in a direction of north west relative to water. find the time taken to cross the river so that man reaches exactly at same point to opposite end of the river...
*February 28, 2015*

**ela**

I'm analyzing JFK's speech for concession and counter argument. In this paragraph, I'm confused which is the counter and which is the concession. 1 "Some say that it is useless to speak of world peace or world law or world disarmament-and that it will be ...
*February 26, 2015*

**4th grade math**

Sorry I meant there are 112 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated, filling up full rows of seats. How many rows are empty?
*February 2, 2015*

**4th grade math**

There are 12 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated, filling up full rows of seats. How many rows are empty?
*February 2, 2015*

**4th grade math**

Thank you, Sandra.
*February 2, 2015*

**4th grade math**

Ursula bought 9 dozen gauze pads for the health office. The gauze pads were divided equally into 4 boxes. How many gauze pads are in each box?
*February 2, 2015*

**4th grade math fraction**

thank you Damon
*February 2, 2015*

**4th grade math fraction**

Ashley bought 4 packages of juice boxes. There are 6 juice boxes in each package. She gave 2 juice boxes to each of 3 friends. How many juice boxes does Ashley have left?
*February 2, 2015*

**4th grade math fraction**

Thank you Ms. Sue.
*February 2, 2015*

**4th grade math fraction**

Jasmine has 8 seashells. Three-quarters are clamshells. How many shells are clamshells?
*February 2, 2015*

**4th grade math**

Choices are Write the remainder as a fraction Use the remainder as the answer Use only the quotient Add 1 tot the quotient
*February 1, 2015*

**4th grade math**

We divided 40/6 and got remainder 4.
*February 1, 2015*

**4th grade math**

A park guide plans the swan boat rides for 40 people. Each boat can carry 6 people at a time. What is the best way to interpret the remainder of 40/6 in this situation so that everyone gets a ride? How do I show the work?
*February 1, 2015*

**4th grade math**

7 are empty. however, the choices are 6 10 16 and 28
*February 1, 2015*

**4th grade math**

16 rows empty
*February 1, 2015*

**4th grade math**

Then the answer is 10.
*February 1, 2015*

**4th grade math**

There are 112 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated, filling up full rows of seats. How many rows are empty? We added and got 189 then divided by 3. But it doesn't look correct. How do we show the work?
*February 1, 2015*

**4th grade math**

Jake wants to distribute 543 marbles equally among 7 of his friends. In what place is the first digit of the quotient?
*February 1, 2015*

**4th grade math**

The school choir has 48 singers with high voices, 53 singers with middle voices, and 39 singers with low voices. the singers stand in 4 equal rows at concerts. How many singers are in each row? How do I show my work for this?
*February 1, 2015*

**4th grade math**

Amanda and her four sisters divided 1,021 stickers equally. About how many stickers would each girl receive? How do I show my work?
*February 1, 2015*

**f**

You have just purchased a new warehouse. To finance the purchase, you’ve arranged for a 35-year mortgage for 85 percent of the $3,100,000 purchase price. The monthly payment on this loan will be $17,200. What is the APR on this loan? What is the EAR on this loan?
*January 28, 2015*

**analytical mechanism**

Problem 4: A block of mass m slides down a frictionless incline as: The block is released from height h above the bottom of the circular loop. (a) Find the force exerted on the block by the inclined track at point A. (Hint: Consider the Newton’s 2nd law in the radial ...
*January 22, 2015*

**analytical**

Problem 1: Consider a particle whose motion is described with the position vector: r (t) = ˆi2c cos𝞈t + ˆjc sin𝞈t, Where c and 𝞈 are constants. (a) Show that the path of the particle is an ellipse satisfying. x2/a2 +y2/b2 = 1, Where x and y ...
*January 22, 2015*

**home work**

Problem 1: Consider a particle whose motion is described with the position vector: r (t) = ˆi2c cos𝞈t + ˆjc sin𝞈t, Where c and 𝞈 are constants. (a) Show that the path of the particle is an ellipse satisfying. x2/a2 +y2/b2 = 1, Where x and y ...
*January 22, 2015*

**home work**

Problem 4: A block of mass m slides down a frictionless incline as: The block is released from height h above the bottom of the circular loop. (a) Find the force exerted on the block by the inclined track at point A. (Hint: Consider the Newton’s 2nd law in the radial ...
*January 22, 2015*

**home work**

Problem 2: A particle of mass m is released from rest in a constant gravitational field. Assuming that the air drag on the particle varies quadratically with speed, that is F (v) = c2v2, show that the distance s the particle falls in accelerating from v0 to v1 is
*January 22, 2015*

**home work**

Problem 2: A particle of mass m is released from rest in a constant gravitational field. Assuming that the air drag on the particle varies quadratically with speed, that is F (v) = c2v2, show that the distance s the particle falls in accelerating from v0 to v1 is given by: s (...
*January 22, 2015*

**physics**

i dont know i ask you question and plz you tell me what is answer ok thankyou
*January 22, 2015*

**Physics**

A bicycle and rider travel along a road. Which of the following statements is true? Neither the bicycle nor the rider undergoes a translation. Only the bicycle undergoes a translation. The bicycle wheels rotate and translate the entire bike and the rider. Only the bicycle ...
*January 15, 2015*

**Ma t h**

Problem 4: A block of mass m slides down a frictionless incline as: The block is released from height h above the bottom of the circular loop. (a) Find the force exerted on the block by the inclined track at point A. (Hint: Consider the Newton’s 2nd law in the radial ...
*January 8, 2015*

**LA**

Thanks!:)
*January 8, 2015*

**LA**

please answer
*January 8, 2015*

**LA**

Johnny struggles to overcome his pride and impatience and develop into a humble, generous young man. 5. Which type of conflict does the statement describe? (1 point) A)character vs. self B)character vs. nature C)character vs. society D)character vs. character
*January 8, 2015*

**math**

the sum of two number is 39 . twice the first number plus 3 times the second numberis 101. find the numbers. x+x+1=39 2x=38 x=19 twice the first number 19 it would be 38 and 57 b three times the second number. i know is wrong kind o but please tell me.
*January 2, 2015*

**math**

A music stores stock of music includes new releasesand top ten hots on the ratio of 3:5. How many top ten hits are tthere in a shipment of 80???? What I did 3:5 *16:*16 48:80 Is it right or not plz tell. I am having so much difficult I in this one
*December 27, 2014*

**math**

Who is correct Damon or me plz tell it
*December 26, 2014*

**math**

A music stores stock of music includes new releases and top ten hits in the ratio of 3:5. How many top hits are there was n a shipment of 80. What I did,,................... 3:5 #16:*16 48:80
*December 26, 2014*

**AP physics**

An object undergoes a displacement x while a force F acts on it. If F does zero work, then the angle between F and x must be
*December 11, 2014*

**AP physics**

A particle of mass 3.00 kg is projected vertically upward with an initial velocity of 20.0 m/s. Neglecting air resistance, the particle’s kinetic energy when it is 20 m above the initial position is:
*December 11, 2014*

**chemistry**

Why the vapour pressure of water and ethanol is 760 mm of Hg at 100 C and 78.5 C ?
*December 5, 2014*

**physics**

an object moves horizontally with a velocity v=20m/s with constant acceleration a=2m/ss.how faar does it move before its velocity is doubled?
*November 30, 2014*

**physics**

a projectile has a maximum range R=150m.find its initial velocity and the corresponding maximum height it reaches. at what angle should it be aimed to hit a target at the same level that is located at a distance x=100m from it?
*November 30, 2014*

**Math**

Betsy is making a flag, she can choose three colors from red, white, blue, and yellow. how many choices does Betsey have?
*November 5, 2014*

**chemistry**

Bringing the real world law into video games could hold various complications. The possible complications outweigh the penitence driven into the prosecuted youngsters for their time wrongdoing. Laws in the real world should be separate from the rules governing an individual&#...
*November 3, 2014*

**physics**

wheel is spinning with angular speed 8.6 radian/sec.small fractional force on shaft causes a constant angular deacceleration and wheel come to rest in 192 sec.what is angular acceleration and total angle turned during the slow down
*October 31, 2014*

**physics**

starting from rest grinding stone has constant angular acceleration 20 rad/sec at time = 0.reference axis is AB.what is angular displacement of line AB.
*October 31, 2014*

**Algebra**

In each bouquet of flowers, there are 4 roses and 6 white carnations. Complete the table to find how many roses and carnations there are in 4 bouquets of flowers? Please help answer thx
*October 28, 2014*

**Algebra**

Please help answer
*October 28, 2014*

**Algebra**

A collector has 120 movie posters and 100 band posters. She wants to sell 24 movie posters but still have her poster collection maintain the same ratio of 120:100. If she sells 24 movie posters, how many band posters should she sell? Explain thx
*October 28, 2014*

**Algebra**

The ratio of North American butterflies to South American butterflies is 5:3. The ratio to South American butterflies to European butterflies is 3:2. There are 30 North American butterflies at the butterfly park. Question A. How many South American butterflies are there? B. ...
*October 28, 2014*

**Algebra**

Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make? Please help answer thx
*October 28, 2014*

**Chemistry**

If I used 24.6 g of of 0.83 M HC2H3O2 (aq) (0.83 mol per 1 L of solution), how much carbon dioxide would be produced? (IT IS ASSUMED YOUR ANSWER IS IN L CO2 so you do not need to include that in your answer.)
*October 25, 2014*

**chemistry**

If I used 0.100L of 0.83 M HC2H3O2 (aq) (0.83 mol per 1 L of solution), how much carbon dioxide would be produced? (IT IS ASSUMED YOUR ANSWER IS IN L CO2 so you do not need to include that in your answer.)
*October 25, 2014*

**chemistry**

If you wanted to produce 0.25 L of CO2 gas (at STP), how many grams of sodium bicarbonate would I need to use? Acetic acid is in excess. (IT IS ASSUMED YOUR ANSWER IS IN g NaHCO3 so you do not need to include that in your answer.)
*October 25, 2014*

**Math-Urgent help please.**

Two cards are selected, without replacing the first card, from a standard deck. Find the probability of selecting an ace (A), and then selecting a 4 (B): (choose 2) 0.603% 0.592 0.592% They are dependent events. 0.00592
*October 13, 2014*

**chemistry**

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 7.00 nm in diameter? Take the mass of an electron to be 9.11&...
*October 12, 2014*

**Statistics-Help please??**

Given a mean of 25 and a standard deviation of 2.3, what is the z-score of a data value of 29? I don't understand the formula they gave me for the z-score, so I dunno where to start. /:
*October 8, 2014*

**math**

When Kaitlin divided a fraction by 1/2,the result was a mixed number.Was the original fraction less than or greater than 1/2? Explain your reasoning
*October 7, 2014*

**4th grade math**

explain the steps to extend number pattern?
*October 2, 2014*

**4th grade math**

explain what do you need to do to extend number pattern?
*October 2, 2014*

**Biology**

What is the water potential of a 5.7 L water in which 2.1 moles of NaCl has been dissolved at 30 degrees celcisus? Help please? Can you show work as well? It'll be greatly appreciated. Thanks in advance.
*September 27, 2014*

**physics**

2 point charges are located at the coordinates in the figure, how much work needs to move a point charge q = ]20ƒÊC from B to A? link to photo dropbox/s/x93u73xu2zslfqj/Untitled.png?dl=0
*September 11, 2014*

**physics**

4 same conductor balls with charge q = 40 ìC and mass m = 30g mare located at the corners of a square a = 30cm. Now let the charged ball move freely from the initial position. What the final speed the ball can reach?
*September 11, 2014*

**math**

How many liters of a 2.5% bleach solution must be mixed with a 10% bleach solution to produce 600 ml of a 5% bleach solution?
*September 8, 2014*

**math**

Belle had the choice of taking out a four year car loan at 8.5% simple interest or a Five year loan at 7.75% simple interest. If she borrows $15,000, how much interest would she pay for each loan? Which option requires less interest?
*September 8, 2014*

**math**

Order -3, 5, 16 and -10 from least to greatest. Then order the same numbers from closest to zero to farthest from zero. Describe how your lists are similar. Would this be true if the numbers were -3, 5, -16, and -10.
*September 4, 2014*

**math**

The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers? Justify your answer. Any help would be greatly appreciated. Thanks in advance.
*September 4, 2014*

**algebra**

Yes that's how to do it, you find the midpoint.
*September 2, 2014*

**Math, Calculus**

The questions says it has 2 solutions. It wants me to find what x would be if cos(x)=-.49 and it is given that x is on the scale between 0 and 2pi. I know that cosine is the x value, and since cosime is negative in this case the two solutions need to be in the 2nd and 3rd ...
*September 2, 2014*

**Physics ...**

Thank you very much .... Your a star
*August 28, 2014*

**Physics ... **

116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
*August 28, 2014*

**science**

116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
*August 28, 2014*

**physics **

116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the sample if the half-life of 116In is 54 m. So far I have come up with ... The half life = 54m x 60 s-1 = 3.24 x 103 s-1 (In2) / λ = In2 / 3.24 x 10^...
*August 27, 2014*

**physics**

THANK YOU .....
*August 18, 2014*

**physics**

Radioactive nuclei are produced in an irradiated sample at the rate of 10 s-1. If the number in the sample builds up to a maximum of 1000, calculate the mean life and the half-life of the radioactive nuclei Using dN / dt = P - λ N dN / dt = 1000n /10/ 1 = 100 P - λ N...
*August 18, 2014*

**physics**

the speed of pendulum is under root 0.91 and time period 1.8 sec what will be its time period in initial frame of reference
*August 1, 2014*

**Chemistry**

What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?
*July 21, 2014*

**mathe**

Show that a right-circular cylinder of greatest volume that can be inscribed in a right-circular cone that has a volume that is 4/9 the volume of the cone.
*July 12, 2014*

**Spanish**

Can someone please check it for me and double check verbs and subjunctives are correct. Thank you, I really appreciate it.
*July 6, 2014*

**Spanish**

I doubt that there is any political issue that could be solved by just sitting around and not doing nothing about it. The world is facing many problems in this era. The most common ones are poverty, pollution and war. How is it possible that there are multi millionaire people ...
*July 6, 2014*

**Spanish**

Discuss your opinions and ideas about three different popular political issues. Include how you think things should be and what you wish certain people would do about it. Articulate your ideas on paper (one-page, typed) using the subjunctive.
*July 6, 2014*

**chem school**

calculate the volume of 2.04 m al l oh 3 needed to neutralize 22.0 ml of 880m h2so4
*June 24, 2014*

**marketing**

thanks
*June 11, 2014*

**marketing**

I need to find companies that are a small business under 20 employers to try to contact for meetings.do you know any companies that are a small business that are under 20 employers.
*June 11, 2014*

**Math**

Suppose you spin a spinner that is equally likely to land on any one of the numbers from 1 to 8. Which event has the same probability as P(not 2 or 3)?
*May 21, 2014*

**math**

sec( pi/7)-sec(2pi/7)+sec(3pi/7)
*May 14, 2014*

**Aths**

Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to your ship?
*May 11, 2014*

**Physics**

A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?
*May 11, 2014*

**chemistry**

Calculate the molar it of a solution that contains 5.4 get of sodium sulfate dissolved in enough water to make 3.5 L of solution
*May 6, 2014*

**CHEMISTRY HELP !!!! **

a.) which of the following reactions should have the larger emf under standard conditions & why? CuSO4 (aq) + Pb (s) goes to PbSO4 (s) + Cu (s); Cu(NO3)2 (aq) + Pb(s) goes to Pb(NO3)2(aq) + Cu(s) b.) Calculate delta G for the reaction.
*April 19, 2014*

**Calculus Help**

I did put these answers in but they're marked wrong Thank you!
*April 19, 2014*

**Calculus Help **

A high-speed bullet train accelerates and decelerates at the rate of 4 ft/s2. Its maximum cruising speed is 90 mi/h. (Round your answers to three decimal places.) (a) What is the maximum distance the train can travel if it accelerates from rest until it reaches its cruising ...
*April 19, 2014*

**Physics**

A 77 kg window cleaner uses a 13 kg ladder that is 7.1 m long. He places one end on the ground 3.8 m from a wall, rests the upper end against a cracked window, and climbs the ladder. He is 3.9 m up along the ladder when the window breaks. Neglect friction between the ladder ...
*April 16, 2014*

**chemistry help~~~~ Please!!!**

how should the ph of a 0.1 m solution of nac2h3o2 compared with that of a 0.1 m solution of kc2h3o2?
*April 10, 2014*

**Geometry**

what is the formula of a base area for a right trapezoidal prism?
*April 6, 2014*

**Chemistry**

I am thrown off by this question because they dont give a molecule to work with. Also i don't know how i would work the acid... help! A 195 mL solution of a dilute acid is added to 102 mL of a base solution in a coffee-cup calorimeter. The temperature of the solution ...
*March 29, 2014*

**physics**

If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?
*March 20, 2014*

**Calculus Please help!**

Consider the function f(x)=4sqrt(x)+4 on the interval [2,5] . Find the average or mean slope of the function on this interval _______ <---A By the Mean Value Theorem, we know there exists a c in the open interval (2,5) such that f'(c) is equal to this mean slope. For ...
*March 7, 2014*

**Calculus Please help!**

f(x) -2x^3+2x^2-3x+2 Find the average slope of this function on the interval (–3–1) ________ <--A By the Mean Value Theorem, we know there exists a c in the open interval (–3–1) such that f'(c) is equal to this mean slope. Find the value of c in the ...
*March 7, 2014*

**Physics**

A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient of kinetic friction...
*March 4, 2014*

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