Tuesday
September 2, 2014

Posts by Alex


Total # Posts: 2,541

Math
Thanks, I did finally get the hang of it after I turned it in the first time with all of those wrong. I dont know how I messed up on it so poorly.
July 1, 2012

Math
. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vice-president for finance decided to invest $2,000,000 in a 2-month investment that pays 11.5% simple interest. How much interest will the college earn on the...
July 1, 2012

Physics
When two identical ions are separated by a distance of 5.9 multiplied by 10-10 m, the electrostatic force each exerts on the other is 6.0 multiplied by 10-9 N. How many electrons are missing from each ion?
June 28, 2012

Math Economics
1. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vice-president for finance decided to invest $2,000,000 in a 2-month investment that pays 11.5% simple interest. How much interest will the college earn on ...
June 27, 2012

US Government
Thanks
June 26, 2012

US Government
Non-voting is a huge problem in the US because... A)many Americans think voting does not make a difference. B)most voters think that all elections are of equal importance. C)many illegal aliens vote. D)most Americans do not believe in democracy I know its not D. I think it is A
June 26, 2012

US Government
Thank you!!
June 26, 2012

US Government
people who believe voting is important have high political ...? (8-letter word) ----c-c-.
June 26, 2012

US Government
people who believe voting is important have high political ...? what clue:(8-letter word) ----c-c-.
June 26, 2012

Physics
A pot contains 243 g of water at 78°C. If this water is heated and all evaporates to form steam at 100°C, what is the change in the entropy of the H2O?
June 21, 2012

R.E
me teacher has asked us to make some questions on guru nanak and i am not sure what to put so i was wondering is someone can help me
June 19, 2012

Physics
Two identical charged particles of mass m=1.6 kg and electric charge Q=-5.2 μC are placed on an frictionless 26° incline. One of them falls down to the bottom and stops against the wall. The other stays at rest in the middle of the incline as shown in Figure. Find is ...
June 13, 2012

Physics
A wave on a string has a speed of 400 m/s. If the tension in the string is 131 N and its length is 3.5 m, what is the mass of the string?
June 11, 2012

Physics help
If a spherical glass marble has a radius of 0.00665 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m? Thanks
June 9, 2012

US government
Which of the following was ratified with the assistance of adding a Bill of Rights to assure citizens that their individual rights would not be imposed upon by the new government? A)The Magna Carta B)The Articles of Confederation C)The Declaration of Independence D)The US ...
June 9, 2012

Physics
Thank you!
June 6, 2012

Physics
The displacement of a harmonic oscillator is given by y = 8.4 sin(14t), where the units of y are meters and t is measured in seconds. What is its maximum velocity?
June 6, 2012

Physics
Thank you so much!
June 6, 2012

Physics
The blood flow rate through the aorta is typically 103 cm^3/s, and a typical adult has about 4.9 liters of blood. (a) How long does it take for all your blood to pass through the aorta? ___________s (b) If your aorta has a diameter of 2.1 cm, what is the speed of blood as it ...
June 6, 2012

Physics
A CD (radius 6.0 cm) is spinning freely with an angular velocity of 450 rpm when a bug drops onto the CD a distance 4.6 cm from the center. If the CD slows to 260 rpm, what is the ratio of the bug's mass to the mass of the CD? (Ignore the effect of the hole in the center ...
June 5, 2012

Physics
Nevermind figured it out, just have to use m1v1=m2v2.
June 5, 2012

Physics
Halley's comet moves about the Sun in a highly elliptical orbit. At its closest approach, it is a distance of 8.90 1010 m from the Sun and has a speed of 54 km/s. When it is farthest from the Sun, the two are separated by 5.30 1012 m. Find the comet's speed at that ...
June 5, 2012

math
at a college book store Carla purchased a math text book and a novel that cost a total of $54, not including tax. If the price of the math math textbook, m is more than 3 times the price of the novel, n what is the price of each book I'm off and coming home?
June 1, 2012

psychology
"I am getting better and better " is great, but lacks the strong effect that a dramatic statement ("I am excellent") has. To combat this, when the void is deep, I recommend using affirmations concerning your virtues and strengths. "I have a real knack ...
June 1, 2012

Pre-calc
Thanks Reiny!!
May 30, 2012

Pre-calc
Project U onto V. U=(4,2) V=(1,-2) ?? Is there a formula for this?
May 30, 2012

Physics
An open railroad car of mass 2445 kg is coasting with an initial speed of 22 m/s on a frictionless, horizontal track. It is raining, and water begins to accumulate in the car. After some time, it is found that the speed of the car is only 5 m/s. How much water (in kilograms) ...
May 30, 2012

Physics
A car engine is initially rotating at 180 rad/s. It is then turned off and takes 1.20 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.
May 30, 2012

Physics
An electric motor is rated to have a maximum power output of 0.72 hp. If this motor is being used to lift a crate of mass 188 kg, how fast (i.e., at what speed) can it lift the crate? Hint: Assume the only other force on the crate is the force of gravity.
May 28, 2012

American History
I think maybe Progressives believed that direct election of senators gave more control of government to the people?
May 27, 2012

American History
One more question: Why did the Progressive movement want the direct election of senators? Senators elected indirectly made little effort to represent the people. Progressives believed that having representatives elected by state legislatures was sufficient. Progressives ...
May 27, 2012

American History
What was one reform the Progressive movement achieved? direct election of U.S. senators reduction of government regulation religious involvement in government elimination of prohibition
May 27, 2012

physics!
while running a marathon, alex is producing about 900 calories per hour. 1 calorie is 4184 j. if the specific heat of the human body is 3500 j/kg x c, how many degrees celsius would alexs temperature increase if he did not sweat and ran the marathon in 3 h and 10 min? he has a...
May 22, 2012

Physics
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?
May 21, 2012

Physics
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?
May 20, 2012

Physics
Thank you so much!
May 20, 2012

Physics
A compact disc spins at 2.8 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the CD when it reaches a point 3.2 cm from the CD's center. What is the coefficient of friction between the ant and the CD?
May 20, 2012

Physics
Thank you!
May 16, 2012

Physics
There are two forces acting on an object. One force has a magnitude of 39 N and is directed along the +x axis. The other force has a magnitude of 25 N and is directed along the +y axis. What is the direction of the acceleration of the object? Express your answer by giving the ...
May 16, 2012

Physics
That makes a lot more sense now. Thanks!
May 16, 2012

Physics
A sled is pulled with a horizontal force of 17 N along a level trail, and the acceleration is found to be 0.40 m/s2. An extra mass m = 4.4 kg is placed on the sled. If the same force is just barely able to keep the sled moving, what is the coefficient of kinetic friction ...
May 16, 2012

Physics
A horizontal rifle is fired at a target 47 m away. The bullet falls vertically a distance of 8 cm on the way to the target. (a) What is the speed of the bullet just after it left the rifle? (b) What is the speed of the bullet just before it hits the target?
May 16, 2012

Physics
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes as shown in the figure below. You pull very hard, and the boxes are accelerating with a = 0.21 m/s2. What is the tension in each rope? Assume there is...
May 15, 2012

Physics
A crate is placed on an inclined board as shown in the figure below. One end of the board is hinged so that the angle θ is adjustable. If the coefficient of static friction between the crate and the board is μS = 0.37, what is the value of θ at which the crate ...
May 15, 2012

Physics
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes as shown in the figure below. You pull very hard, and the boxes are accelerating with a = 0.21 m/s2. What is the tension in each rope? Assume there is...
May 15, 2012

algebra 1
simplify and show work 3+4-10 dived by 2
May 15, 2012

Math
a right angle because 190 degree is a right triangle so find the coralation and simplify awnser determine value and round to the nearest tenth degree
May 15, 2012

Physics
Nevermind I figured it out.
May 14, 2012

Physics
A squirrel is resting in a tall tree when it slips from a branch that is 40 m above the ground. It is a very agile squirrel and manages to land safely on another branch after only 0.71 s. What is the height of the branch it lands on?
May 14, 2012

Physics
A car is moving with a velocity of 16 m/s when the brakes are applied and the wheels lock (stop spinning). The car then slides to a stop in 37 m. Find the coefficient of kinetic friction between the tires and the road.
May 14, 2012

Physics
A person is pushing on a refrigerator that sits on a level floor. Use Newton's third law along with his second law to find the magnitude of the acceleration of a man as he pushes the refrigerator. Assume the man has a mass of 62 kg, he exerts a force of 128 N, the ...
May 14, 2012

algebra
Grace runs 3 miles per day. Find this rate in feet per day
May 8, 2012

Chemistry - please help!
thank you!
May 8, 2012

Chemistry - please help!
The decomposition of KClO3 produces oxygen gas and solid KCl. What mass of KClO3 must be decomposed to produce 126 L of oxygen gas at 133 Celsius and .88 atm? I know I need to use PV=nRT but I can't figure out how.
May 8, 2012

math
A 20 feet vertical pole cast a shadow of 32 feet. What is the angle of elevation of the sun?
May 7, 2012

Algebra 2
Simplify (3^−2 − 2^−2)^−1 The answer is -36/5 I just need to know how to do it.
May 2, 2012

Algebra 2
What are the x-intercepts of the circle with center (0, −2) and radius 3?
May 1, 2012

Algebra 2
A baseball player swings and hits a pop fly straight up in the air to the catcher. The height of the baseball in meters t seconds after it is hit is given by a quadratic function h(t) = −5t^2 + 10t + 1. What is the maximum height of the baseball?
May 1, 2012

Algebra 2
How much of a 60% orange juice drink must be mixed with 30 gallons of a 10% orange juice drink to obtain a mixture that is 50% orange juice.
May 1, 2012

consuer math
Question 1: The cost of joining a gym is $195 plus $50 per month. Rewrite the equation to express cost as a function of time, identify the slope and the y-intercept.
April 27, 2012

consumer math
The cost of joining a gym is $195 plus $50 per month. Rewrite the equation to express cost as a function of time, identify the slope and the y-intercept.
April 27, 2012

math
Tommy has right rectangular prism with base length 5 and a cylinder with radius 2.5. If both objects have equal surface areas, what is : a)the height of the right rectangular prism? b) the height of the cylinder? Use Pi =3.14
April 25, 2012

history
one of president nixons goals was to reduce the number of nuclear weapons the united states had
April 24, 2012

Physics
A 1.55 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 16.5 cm. (a) Find the total mechanical energy of the system. (b) Find the maximum speed of the mass.
April 24, 2012

Physics
.819 s
April 24, 2012

Physics
A uniform rectangular sign of width 47.6 cm, height 25.0 cm, and negligible thickness hangs vertically from supporting hinges attached at its upper edge. Find the period of small-amplitude oscillations of the sign.
April 23, 2012

Physics
A uniform rectangular sign of width 47.6 cm, height 25.0 cm, and negligible thickness hangs vertically from supporting hinges attached at its upper edge. Find the period of small-amplitude oscillations of the sign.
April 23, 2012

Physics
Find the length of a simple pendulum that completes 17.0 oscillations in 35.0 s.
April 23, 2012

Physics
A 1.55 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 16.5 cm. Find the total mechanical energy of the system Find the maximum speed of the mass
April 23, 2012

Physics
A 1.55 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 16.5 cm. Find the total mechanical energy of the system Find the maximum speed of the mass
April 22, 2012

Physics
Radio waves are electromagnetic waves that travel at a speed of 3.00 108 m/s, the speed of light. An AM radio station has an assigned frequency of 1350 kHz, which means that the radio waves broadcast by the station are at this frequency. Find the wavelength of these radio waves.
April 22, 2012

Physics
The free-fall acceleration at the surface of planet 1 is 18 m/s^2. The radius and the mass of planet 2 are twice those of planet 1. What is the free-fall acceleration on planet 2?
April 21, 2012

Trig
Dalco manufacturing estimate that its weakly profit, P, in hundreds of dollars,can be approximated by the formula P= -4x²+8x+7, where x is the number of units produced per week, in thousands. 1)How many units should the company produce per week to earn maximum profit 2)...
April 21, 2012

Physics
A certain radio station broadcasts at 1430 kilohertz. This is the frequency of oscillation of electrons in the transmitting antenna producing the radio wave. Find the period of the electrons' motion.
April 20, 2012

Social Studies
Why were Hoosiers divided over the issues of slavery and loyalty before the Civil War?
April 19, 2012

calculus
Two consecutive days of the week experience a maximum temperature of 90 degrees F at 1:00pm and a minimum temperature of 44 degrees F at 1:00am. Write a cosine equation measured in house that would model this behavior. Let x=0 represent 1:00pm on the first day.
April 18, 2012

Physics
James Joule once attempted to measure the increase in temperature of the water in a waterfall resulting from its decrease in gravitational potential energy. How high would the waterfall have to be for the temperature at the bottom to be 1°C higher than at the top?
April 17, 2012

Physics
James Joule once attempted to measure the increase in temperature of the water in a waterfall resulting from its decrease in gravitational potential energy. How high would the waterfall have to be for the temperature at the bottom to be 1°C higher than at the top?
April 17, 2012

Physics
How much heat is required to raise by 10.30°C the temperature of 1.2 kg of water? How much heat is required to raise by 10.30°C the temperature of 1.2 kg of iron?
April 16, 2012

Physics
A car of mass 1.25 103 kg is initially moving on a level road at a speed of 17.0 m/s. Compute the increase in temperature of the brakes, assuming that all the mechanical energy ends up as internal energy in the brake system. Assume a total heat capacity of 10,000 J/C°.
April 16, 2012

physics
Ice of mass 11.0 kg at 0.00° C is placed in an ice chest. The ice chest has 3.00 cm thick walls of thermal conductivity 1.00 10-5 kcal/s · m · C° and a surface area of 1.25 m2. (a) How much heat must be absorbed by the ice before it melts? (b) If the ...
April 16, 2012

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 532.] Enclosed ...
April 13, 2012

Investment
f you invest $25,000 at 8% interest compounded continuously, what is the average amount in your account over one year?
April 12, 2012

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = −x and y = x/2 for x in [0, 6]
April 12, 2012

Physics
What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654m?
April 12, 2012

social studies
how did geography affect europeans in latin america?
April 12, 2012

Calculus grade 12
a)3cos*2x
April 12, 2012

Chemistry
The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.553 g/cc. The pressure is measured as 653 mmX. What is the pressure in mmHg?
April 11, 2012

s.s help
Growing there own if i was ona farm id wanna grow my own way much cheaper
April 11, 2012

math
if you tossed two number cubes, what sum has the greatest probability of occuring? Explain.
April 11, 2012

Chemistry
Given 3.90mL of 1.80M HCl diluted to .520L, whats the pH?
April 5, 2012

Chemistry
Given 3.90mL of 1.80M HCl diluted to .520L, whats the pH?
April 5, 2012

math
A basketball team needs 5 players. The team can choose from a group of 7 players. Explain how to find the number of combinations of players that can be on the team.
April 4, 2012

Human resources
Role Play In this mock executive team meeting, you will assume the role and responsibility for a specific function (for example, human resources, marketing, finance, legal, and operations). The team will be given a scenario in which strategic decisions are to be made for rapid...
April 4, 2012

Chemistry
How much ice in grams would have to melt to lower the temperature of 58.2 g of water from 55.0 degrees C to 0 degrees C? Assume the density of water is 1.0 g/mL Any advice on how to tackle this problem would be appreciated. Thanks
April 3, 2012

statistics
how do you find the quartile Q3 of the list of 24 sorted values: 30,33,35,38,40,46,46,47,47,49,50,51,53,53,54,56,60,65,73,74,77,78. what is the formuala and how do you work it?
April 3, 2012

chemistry
If you add 5.0 mL of 0.50 M HCl solution to 20.0 mL to Buffer C, what is the pH of the buffer? (where buffer C is 8.203 g sodium acetate with 100.0 mL of 1.0 M acetic acid)
March 31, 2012

Physics
A girl of mass 55 kg throws a ball of mass 0.8 kg against a wall. The ball strikes the wall horizontally with a speed of 25 m/s, and it bounces back with the same speed. The ball is in contact with the wall 0.05 s. What is the average force exerted on the wall by the ball? A) ...
March 30, 2012

Biology
do all specific proteins have the same function in different living organisms?
March 28, 2012

chemistry
given the equilibrium constant for the following reaction at 500 K, 2 NO (g) + O2 (g) <==> 2 NO2 (g) Kc = 6.2x10^5 calculate the equilibrium constant for the reaction expressed as partial pressures, Kp. the answer is 1.51x10^4. How do i get this?
March 28, 2012

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