Monday
July 28, 2014

Posts by Alex


Total # Posts: 2,546

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

US Government
Thank you!!

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

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

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?

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

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 ...

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?

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

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 Cons...

Physics
Thank you!

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?

Physics
Thank you so much!

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 f...

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 o...

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

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 poi...

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?

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?

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 ...

Pre-calc
Thanks Reiny!!

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

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) h...

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.

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.

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

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 believ...

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

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...

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?

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?

Physics
Thank you so much!

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?

Physics
Thank you!

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 ...

Physics
That makes a lot more sense now. Thanks!

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 betwe...

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?

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...

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 j...

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...

algebra 1
simplify and show work 3+4-10 dived by 2

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

Physics
Nevermind I figured it out.

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?

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.

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 refriger...

algebra
Grace runs 3 miles per day. Find this rate in feet per day

Chemistry - please help!
thank you!

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.

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

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

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

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?

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.

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.

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.

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

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

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.

Physics
.819 s

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.

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.

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

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

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

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.

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?

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)Fi...

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.

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

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.

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?

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?

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?

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°.

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 oute...

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 b...

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

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]

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

social studies
how did geography affect europeans in latin america?

Calculus grade 12
a)3cos*2x

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?

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

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

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

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

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.

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...

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

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?

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)

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) ...

Biology
do all specific proteins have the same function in different living organisms?

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?

chemistry
Why do the concentrations of Pb 2+ and SO4 2- ions in a saturated solution of PbSO4 in contact with solid PbSO4 remain the same when the solution evaporates to half of its original volume? it has to do with equilibrium.

chemistry
For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5 (g) <==> PCl3 (g) + Cl2 (g) a) what is the sign of delta S for the reaction? Provide a legitimate rationale for the corre...

ap chemistry
When 50.0 mL of a 0.010 M CuNO3 solution is mixed with 150.0 mL of a 0.010 M NaCl solution, a precipitate forms (Ksp = 1.9 x 10^-7). a) Determine all final ion concentrations b) Determine the mass of the precipitate formed. How do i do this?

Math
Suppose that 600 meters of fencing are used to enclose a corral in the shape of a rectangle on three sides, and then a semicircle on the fourth side (The diameter of the semicircle is equal to the width of the rectangle). Find the dimensions of the corral with maximum area.

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