Thursday

December 18, 2014

December 18, 2014

Total # Posts: 75,674

**physics**

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of the velocity) is the ...
*November 7, 2014*

**physics**

how do you solve this???
*November 7, 2014*

**Pre-Calc/Trig**

Use Descartes' rule of signs to describe the roots of the polynomial function. m(x)=x^3+3x^2-18x-40
*November 7, 2014*

**physics**

Find the displacement of the car after 5.9 s. Answer in units of m
*November 7, 2014*

**Preschool Creative Thinking**

The eclectic theoretical approach that most teachers use means that: a. the major development theories are used on different days of the week on a rotating basis. b. one major developmental theory is used for toddlers, another for preschool, another for kindergarten, and the ...
*November 7, 2014*

**Preschool Creative Thinking and Arts Based Learnin**

Supporting "possibility thinking" means teachers are encouraging children to: a. first solve problems and follow directions, then "think outside the box." b. not merely solve problems but find them, then pose "what if" questions in their minds. c...
*November 7, 2014*

**Pre-Calc/Trig**

Help me please. List all possible rational zeros for the polynomial function. p(x)=3x^3-2x^2-5x-2
*November 7, 2014*

**anger management**

IM TAKING A ANGER MANAGEMENT CLASS AND I DONT UNDERSTAND THE QUESTION
*November 7, 2014*

**anger management**

did you ever confuse anger with aggression? please explain how.
*November 7, 2014*

**physics **

Static friction is smaller than kinetic friction because it is harder to keep an object than moving than to put it in motion.
*November 7, 2014*

**statistics**

what is the weight between 5.5 to 6 ounce when mean is 5,75 ounce and standard deviation is 0.11
*November 7, 2014*

**sentence structure**

What is the subject and predicate of this sentence? "There are children waiting." Is it "children are waiting" or "there are"?
*November 7, 2014*

**math**

How do you find the answer to 35.5×18.76
*November 7, 2014*

**Physics **

block slides across table with initial speed of 8 m/s coefficient of friction between block and table is .5 and table is 4 m long and 1.2 m high determine how far the block lands from the base of the table
*November 7, 2014*

**Physics**

block of mass 3.5 kg slides down frictionless incline that is 10 m long and inclined at angle of 37 when reaches bottom of incline it collides perfectly inelastically with another block of mass 2 kg then slides along a level floor if coefficient of friction between the block ...
*November 7, 2014*

**physics**

find displacement 4 vectors (1) 40 meters @10, (2) 30 meters @ 190 and (1)50 meters @ 280
*November 6, 2014*

**physics**

How high must your roof be to fire 1.2km if it fires at 450 m/s muzzle velocity?
*November 6, 2014*

**physics**

A cannon rests on the ground at 40 degree angle it fires a ball at 200 m/s how high is the top of trajectory? At what impact speed does it rest? How far away does it land?
*November 6, 2014*

**t**

A 15.7-L tank is filled with H2 to a pressure of 237 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.
*November 6, 2014*

**physics**

A cannon 25m off the ground It fires horizontally at 320m/s muzzle velocity How close can it be to begin firing?
*November 6, 2014*

**math**

0.082 rounded to ?
*November 6, 2014*

**Science HELP**

I thinks it D. Because you can't convert chemical change, which mean product and reactant are completely different.
*November 6, 2014*

**Algebra**

symbolize and solve equations using: average prices of three items A, B, C is $ 16000, if the price of the item a is twice the sum of the prices of the items B and C
*November 6, 2014*

**Algebra**

symbolize and solve equations using: average prices of three items A, B, C is $ 16000, if the price of the item a is twice the sum of the prices of the items B and
*November 6, 2014*

**Calculus**

d/dx[(3x^2+2•sqrt of x)/x]=? Is it 3-(1/(x•sqrt of x))?
*November 6, 2014*

**pre-algebra**

a 50-pound bag of grass seed sells for 292.50. find the unit price of grass seed
*November 6, 2014*

**Algebra**

A grocer buys cases of almonds and walnuts. Almonds are packaged 20 bags per case. The grocer pays $30 per case of almonds and makes a profit of $17 per case. Walnuts are packaged 24 bags per case. The grocer pays $26 per case of walnuts and makes a profit of $15 per case. He ...
*November 6, 2014*

**physics**

A 15 kg rock is horizontally from very high cliff at a speed of 65m/s. what is the speed of the rock after it has fallen a vertical distance of 35m?
*November 6, 2014*

**Calculus**

oh thank you. this formate shows a lot better. Thank you Steve.
*November 6, 2014*

**Calculus**

please i need help, oi was looking towards similar problem, but i'm not sure how cube route 75 came into play with one of the problems that had 5 feet tall running parallel at 3 ft distance
*November 6, 2014*

**Calculus**

fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
*November 6, 2014*

**Algebra**

a grocer buys cases of almonds and walnuts. Almonds are packaged 20 bags per case . The grocer pays $30 per case of almonds and makes a profit of $17. Walnuts are packaged 24 bags per case. The grocer pays $26 per case of walnuts and makes a profit of $15 per case. He orders ...
*November 6, 2014*

**math**

Kelly has 4 times as many songs on her music player as Lou. Tiffany has 6 times as many songs on her music player as Lou. Altogether, they have 682 songs on their music players. How many songs does Kelly have. Please teach me the steps on how to do it I`m having trouble on ...
*November 6, 2014*

**French**

Please check these sentences for grammar. 1. Adorez-vous faire les magasins? 2. Est-ce que tu préféres lire à la bibliotheque ou écouter de la musique? 3. Est-ce tu ne préféres pas la pomme avec le petit dejeuner? 4. Est-ce tu n'...
*November 6, 2014*

**physics**

a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds
*November 6, 2014*

**physics**

a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds
*November 6, 2014*

**physics**

What is the maximum speed that the car can turn in a curve of radius 29.0 m without slipping? The coefficient of static friction between a road and a car's tires is 0.500, and the coefficient of kinetic friction is 0.390. Assume that the road is horizontal and flat.
*November 6, 2014*

**english**

Anxiety is to test as procrastination is to
*November 6, 2014*

**physics**

A car drives straight down toward the bottom of a valley and up the other side on a road whose bottom has a radius of curvature of 125mm . At the very bottom, the normal force on the driver is twice his weight.
*November 6, 2014*

**SS**

What are some features of Canadian culture that are different from American culture?
*November 6, 2014*

**matg**

jhb
*November 6, 2014*

**matg**

Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g sample will remain after 20 years? (Points : 1)
*November 6, 2014*

**science**

my booty usatestprep
*November 6, 2014*

**science**

can someone please help
*November 6, 2014*

**science**

brain central nervous system human being nerve tissue neurons Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism, simplest to most complex..
*November 6, 2014*

**geometry**

Jake needs 9 pieces of rope that are each the same length. He cuts the pieces from a rope that is 8 yards long and uses up the whole piece of rope. How long is each piece of rope?
*November 6, 2014*

**wj keenan**

both insulators and conductors can be charged by?
*November 6, 2014*

**physics**

A motorist has to travel 3.50 km in a city with an average speed not exceeding to 25 km/h . If the average speed increases to 40 km/h. What is time he will gain from his journey
*November 6, 2014*

**physics**

A motorist has to travel 3.50 km in a city with an average speed not exceeding 25 km/h. If the average speed increases to 40 km/h, fine the time he will gain in his journey
*November 6, 2014*

**physics**

A motorist has to travel 3.50 km in a city with an average speed not exceeding 25 km/h. If the average speed increases to 40 km/h, find the time he will gain in his journey.
*November 6, 2014*

**algebra**

A repairman purchased several furnace-blower motors for a total cost of $150. If his cost per motor had been $5 less, he could have purchased 1 additional motor. How many motors did he buy at the regular rate?
*November 6, 2014*

**algebra**

A bookstore can purchase several calculators for a total cost of $350. If each calculator cost $2 less, the bookstore could purchase 20 additional calculators at the same total cost. How many calculators can be purchased at the regular price?
*November 6, 2014*

**algebra**

The sum of a number and its reciprocal is 29/10 Find the numbers?
*November 6, 2014*

**STATISTICS**

Suppose that, in order to estimate the proportion of students who wear glasses, a sample of 100 students was collected and showed that 20 of the students in the sample wore glasses. A confidence interval for the population proportion of students who wear glasses is given by: ....
*November 6, 2014*

**math**

A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 14 days and the other pipe can fill it in 22 days. However, if no sewage is added, waste removal will empty the pool in 35 days. How long will it take the two inlet pipes to fill an empty pool? answer
*November 5, 2014*

**statistics**

Suppose that the ages of students at a particular university average 26 years with a standard deviation of 2.8 years. Consider the sampling distribution of the sample mean age of students in a sample of n = 49. The standard deviation of the sampling distribution is
*November 5, 2014*

**Trig**

But this section is on tan only and the answer is 24.
*November 5, 2014*

**Trig**

A playground slide starts 107cm above the ground and is 250cm long. What angle does the slide make with the ground? Give the answer to the nearest degree.
*November 5, 2014*

**Science**

Effects of insecticide on aquatic animals?
*November 5, 2014*

**Math **

i am thinking a number the number in the tens is less than the number in ones.
*November 5, 2014*

**English**

What could the main idea of Through The Tunnel be, in a sentence?
*November 5, 2014*

**Math**

ten trees in three minutes, is the same as twenty threes in six minutes, is the same as 200 trees in 60 min or one hour. time=2500/rate=2500/(200/hr)= 12.5 hrs
*November 5, 2014*

**Statistics**

D) since this is average question with given sample size, you need to use (mean, sigma/root sample size). This is normal distribution, so you don't need to worry about sample size being greater than 30. Therefore, you should do = mean - 2 (0.31/squre root 22) and mean + 2(...
*November 5, 2014*

**ingles**

homework:unscramble the words on writing division exampie(the family,mother)
*November 5, 2014*

**physics**

Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks, as shown. The acceleration of gravity is 9.8 m/s Block 1 has a mass of 5 kg while block two has a mass of 8 kg. A string is tied to the 8 kg block pulling up ...
*November 5, 2014*

**Math**

Chris has a square garden with an area of 38.4 m squared. He decreases the length of each side by 1.7 m to make a smaller garden. What is the perimeter of the smaller garden. {Hint find the length of each side of the bigger garden first, then decrease the length, then find the...
*November 5, 2014*

**math**

what is equal to 3.7
*November 5, 2014*

**Math**

Whats 9+10?
*November 5, 2014*

**Math**

You stupid!
*November 5, 2014*

**science**

i just dont know any similarity between those two resource
*November 5, 2014*

**science**

renewable is energy source that can be used again inexhaustible is energy source that cant be used up by humans
*November 5, 2014*

**science**

what is the similarity of renewable and inexhaustible resource?
*November 5, 2014*

**physics**

ill be happy to check your answer
*November 5, 2014*

**math**

but none of the answers are close to 450 so which one should i choose
*November 5, 2014*

**math**

an average sized dog weighs about A. 15 grams B. 50 grams C. 5,000 grams D. 15,00 grams I don't know the answer, please help
*November 5, 2014*

**Science -- Ms. Sue, please help?**

Thank you so much!
*November 5, 2014*

**Science -- Ms. Sue, please help?**

(Corrected!) 14. producer 15. abiotic 16. nitrogen-fixing 17. heat 18. evaporation 19. consumer 20. nitrogen 21. savanna 22. Not quite sure yet.
*November 5, 2014*

**Science -- Ms. Sue, please help?**

14. The energy role of the first organism in a food chain is always a(n) ___________. 15.Water is a(n) __________ factor in all ecosystems that all living things require. 16.___________bacteria carry out the conversion of gaseous nitrogen to a biologically useful form of ...
*November 5, 2014*

**Math**

A rectangle is to have a perimeter of 18m. the graph below shows the relationship between the area of the rectangle and its width. What is the width of the rectangle with the largest area?
*November 5, 2014*

**English**

I have to create a piece of descriptive writing about a good day at a beach, but I am unsure on how to describe the atmosphere of the beach. Please help! Here is what I have so far: It's the morning of somerset beach. Seagulls haver over waiting for food, ...
*November 5, 2014*

**algebra**

What is the maximum velocity of a roller coaster when the height is 203 feet. Can the problem be solved by factoring the following equation? t^2 -2t-11=0?
*November 5, 2014*

**Algebra**

The formula v=8square root of h gives the relationship between velocity, v (in feet per second and height, h (in feet). What is the maximum velocity of a roller coaster that is 203 feet high? Can the question be solved using the equation t^2-2t-11=0?
*November 5, 2014*

**psychology**

Infants generally sit up without support at a.9 months b.3 months c.6 months d.birth
*November 5, 2014*

**Chemistry**

Cs(s)+H2O(l)→ ? i thought it was H2+CsOH but the computer says that's wrong.
*November 5, 2014*

**physics**

A staging that weighs Wstaging supports a painter weighing 350 N. The reading on the left scale is 600 N and the reading on the right scale is 240 N. What is the weight of the staging?
*November 5, 2014*

**Thermodynamics**

12 kg of water in an insulated container is at 30 C. Initially, only 18 percent of the water is in the liquid phase. An electric heater, connected to a 120-V source and 9 A, is used to heat the system. Determine the time required to vaporize the entire water. Express your ...
*November 5, 2014*

**Finance**

If you open an IRA at a commercial bank and deposit $1000 in the account per year, how much will be in the account after 20 years if the funds earn 7%?
*November 5, 2014*

**Science**

brain central nervous system human being nerve tissue neurons Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism, simplest to most complex..
*November 5, 2014*

**physics**

It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 301 K receives 73.9 % of the work done on it by a wall on impact as an increase in internal energy. (The melting point of lead is 601 K, the heat of fusion for ...
*November 5, 2014*

**physics**

A cryogenic storage container holds liquid helium, which boils at 4.20 K. Suppose a student painted the outer shell of the container black, turning it into a pseudo-blackbody, and that the shell has an effective area of 0.791 m2 and is at 2.95·102 K. What is the rate at...
*November 5, 2014*

**physics**

An air-cooled motorcycle engine loses a significant amount of heat through thermal radiation according to the Stefan-Boltzmann equation. Assume that the ambient temperature is T0 = 24.5°C (297.65 K). Suppose the engine generates 11.5 hp (8.58 kW) of power and, due to ...
*November 5, 2014*

**physics**

A copper sheet of thickness 2.13 mm is bonded to a steel sheet of thickness 1.41 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 24.3°C. a) Determine the temperature (in °C) of the copper-steel interface. b) ...
*November 5, 2014*

**Grammer.Usage. and Micanics**

plp[-ji76udrt5e54y67es
*November 5, 2014*

**Chemistry please help **

A 1.516 M soltion is made by dissolving 1.570 g of the compound in 0.2238 mol of water. Determine the molar mass and apparent molecular formula of the compound.
*November 5, 2014*

**physics**

A truck moves with a constant acceleration and covers a distance between two points 180 apart in 10 seconds. The velocity as it passes the second point is 30 m/s. Whats the acceleration of the truck ? whats the velocity in the first point ?
*November 5, 2014*

**physics**

the speed of a train is reduced uniformly from 10 m/s to 5 m/s while covering a distance of 150 m. What is the acceleration of the train? how much farther will it travel before coming to rest, assuming the same acceleration ?
*November 5, 2014*

**arithmetic**

if the internal diameter of a cylindrical iron piep is 2.8 cm . If the pipe is melted uniformly by 1 mm then it formed a cylindrical rod ,find the diameter of the new rod?
*November 5, 2014*

**Calculus I**

Any help on how to solve this? The range of a projectile launched at an angle θ from the ground with velocity v0 is given by R(θ) = [v0^2 sin 2(θ)]/9.81 . If the projectile is launched at an angle of θ = π/6, use differentials to approximate the ...
*November 5, 2014*

**English**

Which of the following sentences both a direct and indirect object? A. My psychology professor has written several books. B.My pyschology prefessor is one of the best lecturers on campus. c.my psychology professor requires his students to quite a bit outside reading. d. My ...
*November 5, 2014*

**Calculus- Please Help!**

Very confused with this question. Amy help would be appreciated. The ideal gas law states that P V = nRT where P is the pressure in atmospheres, V is the volume in litres, n is the number of moles, R = 0.082 L·atm/K·mol is the gas constant, and T is the ...
*November 4, 2014*

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