Friday
May 6, 2016

# Posts by Rock

Total # Posts: 67

Science
How does friction affect the height that a ball will bounce? Can you give a hypothesis too of what i'll need to do please!? I'm confused
May 22, 2015

The Giver
I disagree, and that was your last chance.
May 22, 2015

The Giver
which one would you pick?
May 22, 2015

The Giver
2 and 3 are right re- check #1
May 22, 2015

The Giver
yea sure
May 22, 2015

chemistry
In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.91 °C to 26.41 °C. If the solution has the same density and specific heat as water, what is ÄH ...
February 20, 2015

Solar Panel
January 8, 2015

electrical Circuits
A 72-ohm coil of wire is connected in series with an adjustable resistor (rheostat) whose resistance can be varied from 0 to 88 ohms. If the line potential is 115 volts, calculate (a) the range through which the coil current can be varied, (b) the rheostat resistance when the ...
August 24, 2014

physics
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m . a) What is her gravitational potential energy on the first day? ...
January 6, 2014

Chemistry 20 titration
1) oi50 . tinypic . com / ejh6vm . jpg The most suitable indicator for the titration is: A)methyl violet B)chlorophenol red C)methyl orange D)phenolphthalein 2-A base is titrated with an acid solution until the indicator changes colour. This change in the colour of the ...
October 22, 2012

Alg2
387.187
December 13, 2011

Alg2
Please Help... You buy a commemorative coin for \$25. The value of the coin increases 3.25% per year. How much will the coin be worth in 15 years? Round to the nearest cent.
December 13, 2011

Alg 2
Suppose you deposit a principal amount of p dollars in a bank account that pays compound interest. If the annual interest rate r (expressed as a decimal) and the bank makes interest payments n times every year, the amount of money A you would have after t years is given by ...
December 13, 2011

Alg 2
Please Help... You buy a commemorative coin for \$25. The value of the coin increases 3.25% per year. How much will the coin be worth in 15 years? Round to the nearest cent.
December 13, 2011

Alg2
Help....Help... Suppose you deposit a principal amount of p dollars in a bank account that pays compound interest. If the annual interest rate r (expressed as a decimal) and the bank makes interest payments n times every year, the amount of money A you would have after t years...
December 12, 2011

Alg2
Help...Please... You buy a commemorative coin for \$25. The value of the coin increases 3.25% per year. How much will the coin be worth in 15 years? Round to the nearest cent.
December 12, 2011

Alg2
Can't figure this one out...The Mendes family bought a new house 10 years ago for \$120,000. The house is now worth \$191,000. Assuming a steady rate of growth, what was the yearly rate of appreciation? Round your answer to the nearest tenth of a percent (1.2% etc)
December 11, 2011

Alg2
the annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in 1996 dollars. In 1985, ...
December 9, 2011

Alg2
An anthropologist finds there is so little remaining Carbon-14 in a prehistoric bone that instruments cannot measure it. This means that there is less than 0.5% of the amount of Carbon-14 the bones would have contained when the person was alive. How long ago did the person die...
December 9, 2011

Alg2
Radioactive iodine is used to determine the health of the thyroid gland. It decays according to the equation y=ae -0.0856t where t is in days. Find the half-life of this substance. Round to the tenths place.
December 8, 2011

Alg2
he annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in 1996 dollars. In 1985, ...
December 7, 2011

Alg2
The Mendes family bought a new house 10 years ago for \$120,000. The house is now worth \$191,000. Assuming a steady rate of growth, what was the yearly rate of appreciation? Round your answer to the nearest tenth of a percent (1.2% etc)
December 6, 2011

Alg2
The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in 1996 dollars. In 1985, ...
December 6, 2011

Alg2
An anthropologist finds there is so little remaining Carbon-14 in a prehistoric bone that instruments cannot measure it. This means that there is less than 0.5% of the amount of Carbon-14 the bones would have contained when the person was alive. How long ago did the person die...
December 6, 2011

Alg2
Radioactive iodine is used to determine the health of the thyroid gland. It decays according to the equation y=ae -0.0856t where t is in days. Find the half-life of this substance. Round to the tenths place.
December 6, 2011

Alg2
Zeus Industries bought a computer for \$2500. It is expected to depreciate at a rate of 20% per year. What will the value of the computer be in 2 years?
December 6, 2011

Alg2
I can See It!!! I was multiplying 600 & 2 together... Thanks :)
December 4, 2011

Alg2
Help w/Word Prob: LAW ENFORCEMENT A police accident investigator can use the formula s=2√5l to estimate the speed=s of a car in miles per hour based on the length=l in feet of the skid marks it left. How fast was a car traveling that left skid marks 120 feet long?
December 4, 2011

Alg2
Thanks, I did!
December 4, 2011

Alg2
Help w/Word Prob: LAW ENFORCEMENT A police accident investigator can use the formula s=2√5l to estimate the speed=s of a car in miles per hour based on the length=l in feet of the skid marks it left. How fast was a car traveling that left skid marks 120 feet long?
December 4, 2011

Alg2
How many ways can six different books be arranged on a shelf if one of the books is a dictionary and it must be on an end?
December 4, 2011

Alg2
YaY!!!!!
December 4, 2011

Alg2
For a college application, Macawi must select one of five topics on which to write a short essay. She must also select a different topic from the list for a longer essay. How many ways can she choose the topics for the two essays?
December 4, 2011

Alg2
I need help with problem solving...
December 4, 2011

Alg2
I need more help
December 4, 2011

Alg2
A video store has 8 new releases this week. Each is available on videotape and on DVD. How many ways can a customer choose a new release and a format to rent? answer here How many ways can six different books be arranged on a shelf if one of the books is a dictionary and it ...
December 3, 2011

Alg2
# of possibilities of arrangements for the word intercept?
December 3, 2011

Alg2
what are the # of possibilities of buying 2 CD's from 10 that are on sale?
December 1, 2011

Alg2
what is the number of possibilities of arrangements of the letters in the word intercept?
November 30, 2011

Alg2
what is the # of possibilities of buying 2 CD's from 10 that are on sale?
November 30, 2011

Alg2
how many ways can 5 members of the 100 member US senate be chosen to be put on a committe?
November 30, 2011

math
on his first exam, he studied for 10 hours and went to tell the mall for 4hours, and got a score of 85. how long should he study to get a grade of 96 and go to the mall for 17 hours? grade varies directly with studying and inversely with going to the mall. is the answer 48hrs?
August 2, 2011

college algeb
when ax^2+bx+c is divided by x-1, the remainder is 10 if the same poly. is divided by x+2 the remainder is 1. x+1 is a factor of the polynomial. Find a,b, and c.
July 20, 2011

physics
Part (a) of the figure below is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.00 rad/s; Part (b) of the figure is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs...
February 4, 2011

physics (shm)
I got .41 m for L in part a and trying to figure out part B!!!
February 4, 2011

physics (shm)
Suppose that a simple pendulum consists of a small 55.0 g bob at the end of a cord of negligible mass. Suppose that the angle between the cord and the vertical is given by θ = (0.0800 rad) cos[(4.91 rad/s)t + ϕ]. (a) What is the pendulum's length? units in m (b) ...
February 4, 2011

physics (simple harmonic motion)
If the phase angle for a block-spring system in SHM is π/5 rad and the block's position is given x = xm cos(ωt + ϕ), what is the ratio of the kinetic energy to the potential energy at time t = 0?
February 4, 2011

simple harmonic motion.
A 5.80 kg object on a horizontal frictionless surface is attached to a spring with spring constant 860 N/m. The object is displaced from equilibrium 50.0 cm horizontally and given an initial velocity of 9.9 m/s back toward the equilibrium position. (a) What is the frequency of...
February 4, 2011

physics
I got part a) 166.25 b)?
January 28, 2011

physics
In the figure below, the fresh water behind a reservoir dam has depth D = 13 m. A horizontal pipe 6.0 cm in diameter passes through the dam at depth d = 6.0 m. A plug secures the pipe opening. (a) Find the magnitude of the frictional force between plug and pipe wall. 1Your ...
January 28, 2011

physics
The intake in the figure has cross-sectional area of 0.75 m2 and water flow at 0.41 m/s. At the outlet, distance D = 180 m below the intake, the cross-sectional area is smaller than at the intake and the water flows out at 9.6 m/s. What is the pressure difference between inlet...
January 28, 2011

physics
thanks
January 28, 2011

physics
Three liquids that will not mix are poured into a cylindrical container. The volumes and densities of the liquids are 0.35 L, 2.6 g/cm3; 0.25 L, 1.0 g/cm3; and 0.40 L, 0.60 g/cm3. What is the force on the bottom of the container due to these liquids? One liter = 1 L = 1000 cm3...
January 28, 2011

physics
the merging of two streams to form a river. One stream has a width of 8.9 m, depth of 3.5 m, and current speed of 2.1 m/s. The other stream is 6.5 m wide and 3.7 m deep, and flows at 2.2 m/s. The width of the river is 10.7 m, and the current speed is 3.1 m/s. What is its depth?
January 28, 2011

physics
the merging of two streams to form a river. One stream has a width of 8.9 m, depth of 3.5 m, and current speed of 2.1 m/s. The other stream is 6.5 m wide and 3.7 m deep, and flows at 2.2 m/s. The width of the river is 10.7 m, and the current speed is 3.1 m/s. What is its depth?
January 28, 2011

chemistry
Its easy
August 30, 2010

Integers
Suppose a1, a2, . . . , an is a list of n numbers with the following properties: The sum of those n numbers is 500. The sum of the smallest three of those numbers is 48. The sum of the largest two of those numbers is 35. (Note: There might be some repetitions among the numbers...
April 15, 2010

math
January 25, 2007

math
n-31/2=12 what is 2+2 do you all know any website that help you with your homwork Yes. This website has many teachers who will help you with your homework. Please post your question. 2 = 1+1 2 + 2 = (1+1) + (1+1) = 1 + 1 + 1 + 1 = 4
January 25, 2007

math
n+1.5=12 n + 1.5 = 12 n = 12 - 1.5 What do you think n equals?
January 25, 2007

physics.
A vertically upward since that is the direction of centripetal acceleration at that time.
December 28, 2006

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