Thursday
December 18, 2014

Posts by Anonymous


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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