Sunday

November 29, 2015
Total # Posts: 487

**physics **

A uniform horizontal beam 5.00 m long and weighting 2.88 102 N is attached to a wall by a pin connection that allows the beam to rotate. Its far end is supported by a cable that makes an angle of 53.0° with the horizontal (Figure (a)). If a person weighing 5.99 102 N ...
*November 28, 2015*

**Chemistry**

A sample of oxygen occupies 38.9L at STP. What will the pressure need to be in Torr. if the volume is to be changed to 32.2L without a change in T. Is this P1V1/T2=P2V2/T2? How would I set it up.
*November 26, 2015*

**physics**

An airplane is travelling at a speed of 600 mph on a heading of 345 degrees. There is a wind moving at a speed of 70 mph on a heading of 20 degrees. The pilot would like to maintain his planned course. Find the speed and heading he should set in order to travel with the wind ...
*November 15, 2015*

**Physics **

What average power would a 1.20 multiply.gif 103-kg speedboat need to go from rest to 18.0 m/s in 4.79 s, assuming the water exerts a constant drag force of magnitude fd = 5.34 multiply.gif 102 N and the acceleration is constant?
*October 24, 2015*

**History**

After 1815, the quest for natio al self-determination posed a grave threat to the____ empire with its many and potentially dissatisfied nationalities.
*October 11, 2015*

**physics, please help**

An object of mass m can slide without friction on a tabletop. A horizontal string tied to the object passes through a frictionless hole in the table and is connected to a second, hanging mass, M. If m is put into motion so that it moves in a circular path of radius r, find a) ...
*October 10, 2015*

**chemistry (Organic)**

According to the two reactions below; 1-chloro-2,2-dimethylbatune + (warm NaOH 3)) 1-chloro-2-methylpropane + (cold dil.NaOH) 1) identify whether the reactions are Nucleophilic Substitutions (SN) or Elimination (E) reaction. 2) Complete the reaction mechanismin each and name ...
*October 8, 2015*

**physics**

10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 12.4 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0....
*September 30, 2015*

**Math**

Jamie brought $72 more than Sally brought. Tia and Sally brought the same amount of money. Sally brought $50 more than Kelly brought. If their total souvenir money did not exceed $502, what is the greatest amount of money Jamie could have brought?
*September 25, 2015*

**Plz help with literature **

The Most Dangerous Game Directions: Each question has a different point value. (134 total) As always, answer in complete sentences. Use the back of the sheet or your own paper. DO NOT CRAM ANSWERS ON THIS SIDE OF THIS SHEET! (5) 1. What do you admire or dislike about Rainsford...
*September 3, 2015*

**U.S. History**

Why is each topic historically significant and what impact did it have on colonial development? Algonkian- Iroquois/Haudenosaunee- Mestizo- Encomienda- Canary Islands- Maize Cultivation- Pueblo- Thanks
*August 11, 2015*

**Science**

How much heat is produced when the body metabolizes a gram of trioleylglycerol?
*May 13, 2015*

**Math - Polynomials**

off-topic: yay it's friday :D Simplify each polynomial. 1. 6g + 8k + 9g + 2k A) 3g + 10k B) -3g + 10k *** C) 17gk D) 10k - 3 2. -4x + 6x2 + 5x A) 7x^3 B) 6x^2 + 9x *** C) 6x^2 - 9x D) 6x^2 + x 3. a^2 + 5a - 3a^2 A) 5a + 2a^2 *** B) 5a - 2a^2 C) 2a^2 + 5a D) 5a - 3a^2 Are ...
*May 8, 2015*

**English Ms Sue/Writeacher**

Sure! What is it?
*May 8, 2015*

**English Ms Sue/Writeacher**

So, yes, D would be your answer.
*May 8, 2015*

**English Ms Sue/Writeacher**

D is incorrect, the comma after "was" is not needed.
*May 8, 2015*

**chemistry**

how much copper sulfate do i need to make a solution of 100ml of 1M copper sulfate?
*April 30, 2015*

**chemistry**

is the reaction between Copper sulfate and zn exothermic or endothermic and does that involve the activity series?
*April 28, 2015*

**algebra**

you and me
*April 27, 2015*

**NEED HELP ASAP PHYSICS@!!1**

Tarzan (m = 78.4 kg) tries to cross a river by swinging from a vine. The vine is 10 m long. Tarzan doesn't know that the vine has a breaking strength of 1045 N. What maximum speed (in m/s) can Tarzan have at the bottom of the swing (as he just clears the water) in order to...
*April 10, 2015*

**NEED HELP ASAP PHYSICS@!!1**

A person is flying a model airplane with mass 82.2 gram in a horizontal circular path on the end of a string 10.5 m long. The string is horizontal and exerts a force of 3.22 N on the hand of the person holding it. What is the speed (in m/s) of the plane? PLEASE PLEASE PLEASE ...
*April 10, 2015*

**physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0 m and the coefficient of friction is 0.43?
*April 8, 2015*

**Chemistry**

What is the volume of 20.55 grams of hydrogen gas at a pressure of 1.215 atmospheres at 29.3 degrees Celcius? how do you solve this
*March 3, 2015*

**physics**

A wheel starts from rest and rotates with constant angular acceleration to an angular speed of 9.3 rad/s in 1.39 s. Find the magnitude of the angular acceleration on the wheel
*February 8, 2015*

**math **

kellys dog eats 1 2/3 bones in 10 days. How many bones will he eat in 18 days?
*February 8, 2015*

**Physics**

An object moves in a circular path at 861 rpm. If the radius of its circular path is 9.27 meters, calculate a) the distance traveled in one complete revolution d = m b) the time it takes for one complete revolution T = seconds c) the linear speed of the object as it moves in a...
*January 11, 2015*

**Physics**

What is the vector product of A=2i + 3j + 1k and B=1i - 3j - 2k?
*November 23, 2014*

**Math**

There are 25 plants in arts garden. There are four times as many tomato plants as bean plants. How many tomato and bean plants are there?
*November 13, 2014*

**Physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...
*November 12, 2014*

**Physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...
*November 12, 2014*

**Math**

Katie measures that 6 1/2 pieces of model plane parts were five in one fifth inches long how long is each piece
*November 10, 2014*

**physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...
*November 9, 2014*

**Math **

Groups in math class have 4 green marbles, 6 yellow marbles, and 10 black marbles. Each group pulls out a marble, records it, and then replaces it 50 times. The class complies its data. how many times can you expect to pull out a green marble with 1000 pulls?
*November 6, 2014*

**Math Calc**

Given a right triangle ABC with a=13 and b=26, find the value of angle A, angle B, and side length c. Round to the nearest thousandth.
*November 2, 2014*

**HELP! - Physics**

I need help with this. A frustrated farmer is trying to move a large rock from his land. The stone has a mass of 1275 kg. By using a piece of board as a lever and a fulcrum the farmer will have a better chance of moving the rock. The farmer places the fulcrum 0.288 m from the ...
*October 28, 2014*

**Calculus**

167.5516
*October 19, 2014*

**physics**

Two people jump out of an airplane. They hold on to each other while falling straight down at a shared terminal speed of 60.7 m/s. Suddenly, they push away from each other. Immediately after separation, the first skydiver (who has a mass of 89.3 kg) has the following velocity ...
*October 9, 2014*

**physics**

An astronaut comes loose while outside the spacecraft and finds himself floating away from the spacecraft with only a big bag of tools. In desperation, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The astronaut has a mass ...
*October 9, 2014*

**Physics **

A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the goal of ...
*October 9, 2014*

**physics**

I am struggling with this. A wombat of mass 22.0 kg starting at rest slides 13.0 m down a tree at a speed of 5.80 m/s just before reaching the bottom. (a) What is the change in the gravitational potential energy of the wombat during the trip? (b) What is the wombat’s ...
*October 2, 2014*

**physics**

We do not know the mass of block. The angle of the ramp going down is 44.3 degrees and after it goes across the horizontal surface, it goes up a second ramp at 24.5 degrees
*October 2, 2014*

**physics**

I am having great difficulty with this question. A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without ...
*October 2, 2014*

**Math Problem (please help)**

A theater has room for 100 people inside. During the last show, the theater was only filled 60% capacity. How many tickets were not sold for the last show?
*September 26, 2014*

**psych 42 **

The mean (μ) of the scale is 55 and the standard deviation (σ) is 7. Assuming that the scores are normally distributed, what PERCENTAGE of the population scores are above 59?
*September 21, 2014*

**Analytic Geometry**

Find the vertices, foci, eccentricity and length of the latus rectum of the ellipse whose equation is x^2 + 9Y^2 = 9
*September 17, 2014*

**language arts**

So is contention an wisdom the answer?
*September 16, 2014*

**math**

5. There are x dictionaries in a bookstore. After 1/8 of them were purchased, 10 more dictionaries were shipped in bringing the total number of dictionaries to 52. What is the value of x?
*July 28, 2014*

**math**

If n>0, then (4^n)(8^n)= A.2^9n B.2^8n C.2^6n D.2^5n E.2^4n
*July 28, 2014*

**math**

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1.5 hours. How quickly can all three fill the pool together? A.12 minutes B.15 minutes C.21 minutes D.23 minutes E.28 minutes I got 53 minutes, but ...
*July 28, 2014*

**math**

6. In a residential building, the ratio of man and woman is 5 to 8. In August, there are 30 men and 10 women moving out from the building. After that, the ratio of man and woman in this building is 1 to 2. How many men were there in the building before August 1? please show work.
*July 28, 2014*

**math**

If 12V=3W, and v(not equal)=0, then which of the following is equivalent to 2W-8V? A.0 B.4W C.-6W D.2V E.-2V please show work.
*July 28, 2014*

**math**

How many three-dight integers greater than 600 contain only odd digits?
*July 28, 2014*

**math**

2. James spends 10% of his money for movie; he also spends 20% of his money for his lunch. Then he buys $20 in his office supplies. In the next day, he spends $10 for his breakfast. Now he leaves 40% of his original money. How much does he save originally? please show work.
*July 28, 2014*

**math**

Mr. Brown sold a jacket for $240, this making a profit of 20% on his cost. Later, he sold another jacket for $240 this time suffering a loss of 20% on his cost. The result of the two sales was A.He gained $40.00 B.He gained $10.00 C.He lost $20.00 D.He lost $10.00 E.He gained...
*July 26, 2014*

**math **

2.If the largest of 7 consecutive integers is 25 what is the average of the 7 integers? A.24 B.22 C.21 D.20 E.16 I got E, this is my work: 7x+21/7=25 7x+21=175 -21 -21 7x=154 x=22
*July 24, 2014*

**math**

Janelle has $20 and is saving $6 per week. April has $150 and is spending $4 per week. When will they both have have the same amount of money? please show work,
*July 24, 2014*

**math**

6. If each of eight biology classrooms is in use for 5 hours and 15 minutes per day, and total of 84 student experiments are done, how long does each experiment take on average? A.20 minutes B.30 minutes C. 40 minutes D.50 minutes E.1 hour please show work.
*July 23, 2014*

**math**

A company wants to send out a mailer. A mailer be sent only if it has an envelope and a stamp. For the number of mailers printed, the company has only 1/2 the number of envelopes needed. Of those mailers for which there are envelopes, the company has only 1/3 the number of ...
*July 23, 2014*

**math**

9.If 1/4 the recommended daily requirement of vitamin P is 2 ounces, what is the total recommended daily requirement of vitamin P? please show work.
*July 23, 2014*

**math**

Ex 12: The smallest of five consecutive integers is represent by y-3. What is the largest of these integers, in terms of y? please explain and show work.
*July 22, 2014*

**math**

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.
*July 21, 2014*

**math**

Rico works for a landscaping company. He will enclose a square garden, using a full 50 ft roll of wire fencing. What could the largest dimension of the garden be? Sketch and label the garden, then calculate perimeter to verify your answer.
*July 19, 2014*

**math**

5. The sum of 7 unequal positive integers is 61. What is the largest possible value that any of those integers can have? A.55 B.40 C.39 D.13 E.9 please show work
*July 19, 2014*

**math**

One package of water plants is recommended for 3000 cubic centimeters of water in a fish tank. How many packages of plants will be needed for a 45cm by 70cm tank that is filled to a depth of 10cm? please show work.
*July 17, 2014*

**math**

Rosa is working on rectangular fish tank that is 15 cm wide and 20 cm long. How much tape will she need to put all around the top of the tank? please show work
*July 17, 2014*

**math**

What number, when has "4" as exponent and increases by 4, is equal to the product 26 and 10?
*July 16, 2014*

**math**

Bob's age is now 3 times of Tom's age. Twelve years from now, tom will be 15 years old. How old is Bob now? please explain and show work
*July 16, 2014*

**math**

If length of one side of a 3x3 square is four times, and the length of the adjacent side is tripled, the perimeter of the new rectangle is how many times bigger than the perimeter of the original square? please explain and show work.
*July 16, 2014*

**math**

One phone plan charges a $20 monthly fee and $0.08 per minute on every phone call made. Another phone plan charges a $12 monthly fee and $0.12 per minute on each call. After how many minutes is the charge the same for both plans? A.60 minutes B.90 minutes C.120 minutes D.200 ...
*July 14, 2014*

**math**

Fred earns $56 a week. 0.0613 of his pay is taken out for Social Security. To the nearest cent how much is taken out each week?
*July 12, 2014*

**math**

5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?
*July 8, 2014*

**math**

7500
*July 8, 2014*

**math**

3.Students at one school sell magazine subscriptions to raise money for athletic equipment. The school keeps 20% of sales. How many dollars worth of subscriptions must be sold to make $1500?
*July 8, 2014*

**math**

A ship model is 0.5% actual size. If the model is 1 meter long, what is the actual length of the ship?
*July 8, 2014*

**math**

It equals 45.
*July 3, 2014*

**math**

8. Of the 180 students who took part in the Race for Hunger, about 5/8 were sophomores. Of the sophomores, 40% were girls. How many sophomore girls took part in the race? A.35 girls B.125 girls C.45 girls D.72 girls please explain and show work
*July 3, 2014*

**math**

The surface area of a cube with edge 2 is how many times the surface area of a cube with edge square root 2. A.square root 2 B.2 C.4 D.4 square root 2 E.8 please explain and show work.
*July 2, 2014*

**math**

6. A magician plays a game using a full deck of cards. This includes 4 each of aces, numbers 2-10, jacks,queens, and kings. What is the probability that an even numbered card will not be selected? please explain and show work.
*July 2, 2014*

**math**

Paul multiplied the sum of three and a number by three. This result was equal to fifty four plus twelve times the opposite of the number. What was his number? please explain and show work.
*July 2, 2014*

**math**

You worried about math last year for 300,000 minutes. this year you will worry about math for only 60 minutes.What percent decrease in minutes of math worry will you experience this year? please explain and show work.
*July 1, 2014*

**algebra**

How would I write this sentence as an equation in two variables? The-value is 5 more than 3 times the x-value
*June 22, 2014*

**algebra**

When 20% of a number is added to the number, the result is 60. Which one is the correct answer? ( 10, 50, 17, 120 )
*June 22, 2014*

**algebra**

When 4 times a number is added to 7 times the number, the result is 33. which one is correct? ( -4.7, 1, -3, 4.7 )
*June 22, 2014*

**algebra**

When 4 times a number is subtracted from 7 times the number, the result is 30. which one is correct? {3, -15, 10, or 0.9
*June 22, 2014*

**algebra**

Solving the linear equation -2x-2+7(x+1)=2x
*June 22, 2014*

**algebra**

I already picked the wrong answer. I am trying to get the correct multiple choice answer for this question
*June 22, 2014*

**algebra**

The y-value is 5 more than 3 times the x-value. Which answer? 1. y=3x+5 2. y=-3x+5 3. y=-3x-5 4. y=3x-5
*June 22, 2014*

**algebra**

1.-2X-2 +7(x+1)=2x 2. 9x-1=-5+8x 3.7x-3= 4. when 4 times a number is subtracted from 7 times the number, the result is 30. What is the number? 5. when 4 times a number is added to 7 times the number, the result is 33. What is the number? 6. When 20% of a number is added to the...
*June 22, 2014*

**algebra**

solve for linear equation: -2x-2+7(x+1)=2x
*June 22, 2014*

**algebra**

In this equation or question: translate the following text into an equation involving ratios and solve it. " Anne is paid $45 per hour, if she worked 55 hours in a particular week, how much will she be paid that week? 45/1 = x/55: cross multiply and solve for x. 45(x)= ...
*June 22, 2014*

**Math**

How are addition and multiplication used to solve a linear equation? Demonstrate by solving " 15x+7=31+3x
*June 19, 2014*

**Math**

Translate the following text into an equation involving ratios and solve it. " Anne is paid $45 per hour, if she works 55 hours in a particular week, how much will she be paid that week?
*June 19, 2014*

**Math**

Yes, maybe an example
*June 16, 2014*

**Math**

Evaluate the algebraic expression: 6x+2= 3x-4= 9x+6=
*June 16, 2014*

**math**

When four times the number is added to 7 times the number, the result is 33, what is the number?
*June 15, 2014*

**math**

The distance between points A and B is 10 units. If a has coordinates (4,-6) and B has coordinates (-2,y), determine the value of y. Please show work and explain. A.-6 B.-2 C.0 D.1 E.2 This is what I got so far: 10= square root of (4-(-2))^2+(-6-(y))^2
*May 30, 2014*

**maths**

If 5 1/2 yards = 1 rod and 3 feet = 1 yard,how many rods are equivalent to 1 foot? 1. 2/11 2. 6/11 3. 2/33 4. 11/6 5. 11/2 6. 11/8
*May 23, 2014*

**maths**

A box of 12 table costs 21 cents.The same brand is packaged in bottles containing 100 tablets and sells for $1.50 per bottle.How much is saved per dozen, by purchasing the larger amount? 1. 1/4 cents 2. 1 cents 3. 1/2 cents 4. 1 3/4 cents 5. 3 cents 6. 6 cents
*May 23, 2014*

**Math**

If x<y, z=x/2 and a=y/2, then please show work/ explain A.z<a B.a>z C.a=z D.2a>y E.2x>2z
*May 14, 2014*

**math**

5.If inequalities are multiplied by positive number, the order remains the same. If x>y and z>0, then xz>yz. However, if inequalities are multiplied by negative numbers the order is reversed. If x>y and z<0 then xz<yz Please show work and explain.
*May 13, 2014*