Thursday

April 17, 2014

April 17, 2014

Total # Posts: 68,135

**physics**

A simple pendulum consists of a small object of mass 1.2 kg hanging at the end of a 2.07 m long light string that is connected to a pivot point. Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes an angle of 6.59 de...

**Finance**

7 months

**Finance**

One of your customers is having trouble paying her account. You agree to a repayment schedule of $300 per month. You charge 1% per month interest on late accounts. If the current balance is $2000, how long will it take to pay off the debt?

**Psychology **

What make perception a cognitive rather than a simply sensory skill?

**Physics**

suppose that you drop the ball from a height of about 2m above the floor, releasing it from rest. on the axes that follow, sketch your predictions for the velocity-time and acceleration-time graphs of the ball's motion. assume that the positive y direction is upward

**chemistry**

what is the balanced chemical equation and how do you find the percent yield of iron in the experiment?

**chemistry**

in an experiment, a 4.000grams sample of aluminum metal is added to a solution containing 5.000grams of dissolved iron chloride. the reaction results in the formation of aluminum chloride and metallic iron. when the reaction is complete, unreacted aluminum remains, and this un...

**math**

John is looking at a map and it says that 1 inch = 50 miles. John wants to travel to a town that is 7.5 inches away on the map. How many miles must he travel to get there?

**Chemistry**

But I thought that the enthalpy of a reaction was dependant on the ratio of moles in the products vs moles in the reactants, not the limiting reagent..

**Quick Math Question**

Thanks Damon! My math skills are sadly not where they should be.

**Quick Math Question**

I was working out a problem and reached an answer of 3ln |x|+ (1/x)+ ln |x+1| The final given answer is (1/x) + ln |x^4 +x^3| I see that the (1/x) carried over and I know how the x^3 got there, but I'm confused as to the x^4. Can someone kindly explain this to me?

**pre calculus**

Find the exact values: tan(7pi/4) - tan (pi/6)

**Science**

PLEASE HELP !!!!! how are newtons second and third laws of motion important to your everyday life?

**math**

Sally made an initial deposit into an account bearing an interest rate of 7% compounded continuously. How long will it take for Sally's initial deposit to double in value?

**math**

P=347e^.023t, where t is the number of years after 1990. According to the model, in what year will the population reach 1000?

**math**

P=347e^.023t, where t is the number of years after 1990. Use the model to estimate the population in the year 2012.

**math**

Suppose 48,000 is invested at an interest rate of 4.2%, compounded quarterly. What will the account be in 10 years?

**world history**

how did Japan consolidate its hold over its people during the interwar period?

**math**

but how do they both equal zer

**math**

an open-topped box can be made from a rectangular sheet of aluminum, with dimensions 40 cm by 25 cm, by cutting equal-sized squares from the four corners and folding up the sides. Declare your variables and write a function to calculate the volume of a box that can be formed. ...

**Phys**

A typical lightning bolt has about 10.0 C of charge. How many excess electrons are in a typical lightning bolt?

**Physics**

When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

**Physics**

When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

**Chemistry - Science (Dr. Bob222)**

A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a volumetric flask and u...

**Chemistry - Science**

Thank you!

**Chemistry - Science **

A 6.70 g sample of a binary mixture of silver (I) nitrate and sodium nitrate is completely dissolved in water to make a solution. Aqueous barium chloride is then added to this solution in excess to form 3.60 g of silver chloride solid. What is the percent by mass of silver nit...

**physics 1**

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 88.1-kg man just before contact with the ground has a speed of 3.53 m/s. (a) In a stiff-legged lan...

**College Chemistry (DrBob222)**

Thank you very much!!! Now it makes sense

**College Chemistry (DrBob222)**

A solution of an unknown weak acid, HA, is titrated with 0.100 M NaOH solution. The equivalence point is achieved when 36.12 mL of NaOH have been added. After the equivalence point is reached, 18.06 mL of 0.100 M HCl are added to the solution and the pH at that point is found ...

**College Gen.Chemistry **

A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a volumetric flask and u...

**Geometry**

Find the midpoint of the segment with the given endpoints. M(–2, 1) and O(–3, 2)

**Math**

A 3-foot piece of wood is cut into two equal sections. How long is each section in inches? a. 9 inches b. 18 inches c. 27 inches d. 36 inches

**College Chemistry (DrBob222)**

You have 120.0 mL of a 0.245 M solution of NaCl in an open beaker. After several days, you test the solution and find that it now has a concentration of 0.348 M. How much water must have evaporated from the beaker given the new concentration?

**College Gen. Chemistry - Science**

Dear Dr Bob222, Thank you so much! The answer is 35.5 mL on H2O has evaporated.

**College Gen. Chemistry - Science**

You have 120.0 mL of a 0.245 M solution of NaCl in an open beaker. After several days, you test the solution and find that it now has a concentration of 0.348 M. How much water must have evaporated from the beaker given the new concentration?

**physics**

a spaceship is moving at 1000 m/s release a satellite of mass 1000 kg at a speed of 10 000 m/s. what is the mass of the spaceship if it slows down to a velocity of 910 m/s?

**Ms. Sue?**

Ms. Sue?

**Literature/Social Studies (Ms. Sue!)**

I have been trying to think but, no matter how many times I read Kennedy's speech, I struggle to answer this question.

**Ms. Sue?**

Ms. Sue?

**Literature/Social Studies (Ms. Sue!)**

Oh. Alright. I need to hurry, though.

**Literature/Social Studies (Ms. Sue!)**

Was #2 incorrect? Also, what might the answer be for number #4?

**Literature/Social Studies (Ms. Sue!)**

Thank you so much! Could you also evaluate my how-to essay? I would truly appreciate it if you could.

**Literature/Social Studies (Ms. Sue!)**

The New Frontier" by John F. Kennedy. 1. What ideas does Kennedy express by quoting William Brandford? A: By quoting William Bradford, Kennedy expresses the idea that, despite great difficulties, man can overcome anything through their will and determination. 2. What reas...

**Please, I must hurry!**

I need to leave soon.

**How-To Essay Evaluation (Writeacher)**

Writeacher, are you able to help me?

**How-To Essay Evaluation (Writeacher)**

No, I have only been assigned to write a 3-paragraph ho-to essay.

**How-To Essay Evaluation (Writeacher)**

What do you think? "In order to shoot a bow accurately, the first step to take is to determine your dominant eye (the eye from which a person prefers to receive visual input). While this action might have been what you least expected, by determining your dominant eye, you...

**Math**

Find the radius of a circle so that it's area and circumference have the same value.

**Ms. Sue?**

Ms. Sue?

**Literature/Social Studies**

Thank you so much! However, are my other answers correct? I also don't know the answer to the second question in #4.

**Literature/Social Studies**

No matter how many times I studied the third paragraph, I still don't know.

**HELP ME! **

Please, help me!

**Literature/Social Studies--Please, help me!**

Please, help me!

**Literature/Social Studies**

1. By quoting William Bradford, Kennedy expresses the idea that, despite great difficulties, man can overcome anything through their will and determination. 2. Kennedy offers reasons such as the task of going to the moon being difficult, the goal serving to organize and measur...

**Literature/Social Studies**

Yes, one of the links does. The speech is called "The Rice Moon" by John F. Kennedy.

**Literature/Social Studies**

Kennedy gave this speech in 1962 in Huston, Texas at Rice University.

**Literature/Social Studies--Please, I have to leave soon! **

Please, help me!

**Literature/Social Studies**

"The New Frontier" by John F. Kennedy. 1. What ideas does Kennedy express by quoting William Brandford? A: ? 2. What reasons does Kennedy offer for going to the moon? A: Kennedy offers reasons such as the task of going to the moon being difficult, the goal serving to...

**geometry cumulative**

A cylinder’s radius is reduced to 2/5 its original size and the height is quadrupled. How has the volume of the cylinder changed?

**Math**

Use the inverse matrix to solve this system of equations: 4x+3y=7.5 7x+9z=14 4y-z=8.3 A) x = -2.125, y = 3.23, and z = 4.555 B) x = 1.661, y = 2.509, and z = 0.404 C) x = 2.509, y = 1.661, and z = -0.404 D) x = 0.260, y = 2.435, and z = 1.375 E) x = 2.435, y = 1.375, and z = 0...

**grammar**

hey.. can u do 3 sentences for my homework.. put from direct to indirect speech.. 1)'I've got plan I and know we can killl the Ice-Man!' 2)'The show is minning overtime. Peter please, could you speed up?' 3)'Come on Steve, you can do it! Jump!'

**HEALTH**

Words and Definitions that go along with the std chlamydia?

**Geometry B**

The equation x2 + y2 − 2x + 2y − 1 = 0 is the general form of the equation of a circle. What is the standard form of the equation?

**Physics**

In Stranger in a Strange Land, Robert Heinlein claims that travelers to Mars spent 258 days on the journey out, the same for return, \plus 455 days waiting at Mars while the planets crawled back into positions for the return orbit." Show that travelers would have to wait ...

**discrete mths**

Two dice, one red and one white are rolled. What is the probability that the white die turns up a smaller number than the red die ?

**Convert fraction decimal and percent**

On Friday math test. will missed 5 problems out of 25. If each problem was equally weighted, what was will's grade on the test? A. 20% b. 75% c. 80% d. 85%

**Physics**

A series RCL circuit contains only a capacitor (C=6.60 F), an inductor (L=7.20 mH), and a generator (peak voltage=32.0 V, frequency=1.50x10^3 Hz). When t 0 s, the instantaneous value of the voltage is zero, and it rises to a maximum one-quarter of a period later. (a) ...

**French**

What is the difference between "rue" and "roue" in pronunciation?

**Pre-Calc**

How would you go about finding all the solutions of the equation. I just don't know where to start. 2cos2theta-root3=0

**Puncuation**

How should I revise this sentence, then?

**Puncuation**

Does this sentence require any improvements in terms of punctuation? I think Hansberry means that summer is honorable in terms that this season does fulfill wishes and dreams like she had been told; Hansberry’s wish being that the dying woman could live to see “at le...

**physics**

A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.90 rev/s. The disk rotates through 5.50 revolutions before coming to rest. What is the tangential acceleration of a point on the disk 5.05 cm from the axis?

**math**

Sonya spent 2/5 of her money and then had $18 left. How much money did Sonya originally have?

**Finance**

eef

**stats**

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that, of two items sold during a given hour by this company, neither will be returned for a refund.

**Physics**

A wagon is coasting at a speed vA along a straight and level road. When twenty-five percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this mass is thrown is ex...

**Physics**

A box of mass 54.0 kg is sitting on a ramp which makes an angle of 37.0 degrees with respect to the horizontal. The coefficient of friction between the box and the ramp is 0.21. This box is connected by a massless string over a pulley at the top of the ramp to a second box wit...

**Physics**

A box of mass 50.0 kg is connected to a second box with a mass of 54.0 kg. Both are sitting on a horizontal surface and the coefficient of kinetic friction between the surface and each box is 0.51. If the second box is pulled away from the first box with a force of 605.8 N, fi...

**Water cycle question**

Explain why residence time in the atmosphere for water is short but the flux in and out of the atmosphere is huge.

**Water cycle question**

The planet is covered by 97% ocean water. What would the global water cycle look like if the earth were covered by 50% ocean water?

**Physics**

Two boxes of mass 7.40 and 7.00 kg are in contact and are accelerated across a horizontal surface by an force of 51.49 N applied parallel to the surface and pushing on the lighter box. The magnitude of the frictional force between the surface and the lighter mass is 9.26 N and...

**Physics**

Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg. to the horizontal. The cofficient of kinetic friction between the lighter block and the plane is 0.15 and that between the heavier block and...

**math**

mr andropolis wants to leave the waitress a 12% tip. estimate the tip he should leave if the family's bill is $32.46

**Implicity **

Find dy/dx implicitly in terms of x and y only for the following function; X+4xy=y^2

**Calculus A **

Find all relative extrema and points of inflection for the following function... h(X)= X^2+5X+4/ X-1 min= max= inflection points=

**math**

7^n =7^5=16807

**Physics**

A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal.what is the magnitude of the normal force between the ramp and the box? The applied force= 1167.04N

**math**

3/4 as decimal

**math**

0.7 as a fraction

**math**

Yes. Thank you!

**math**

0.6 as a fraction

**math**

0.625 as a percent

**Algebra 1 Answer Evaluation **

Factor. 1. 30y^3 - 50y A: 10y(3y - 5y) 2. Factor a^2 - 5a^2 + 2a -10 by grouping. A: ?

**math**

0.6 as a percent

**math**

1/2 as a decimal

**math**

2/5 as a decimal

**math**

0.25 as a fraction

**6th gr. math**

0.2 as a percent?

**Math**

I do wish I had a tutor but right now my family doesn't have an income and I can't pay for a tutor. Since I live in Costa Rica everything here is expensive.

**Math**

I have reviewed the lesson that explains this three times, but I have ALWAYS had a hard time with Math and this is Pre-Cal. And I get so frustrated that I start to cry!!!! URRRGGGGHHHH!!!!

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