Thursday

January 29, 2015

January 29, 2015

Total # Posts: 569

**gifted math**

1
*January 26, 2015*

**gifted math**

24 pencils in a box each student in the class gets 6. There are no pencils left over. How many students are in the class? write an equation to represent the situation.
*January 26, 2015*

**Physics**

mrubber stopper = 0.07Kg mmetal washers = 0.196Kg radius = 1.0m total time = 12 seconds # of revolutions = 10 revolutions With this data, calculate the centripetal Force (Fc) (to 2 decimals) of the rubber stopper in its "orbit".
*January 20, 2015*

**Physics**

mass rubber stopper = 0.07Kg mass metal washers = 0.196Kg radius= 1.0m total time = 12 seconds # of revolutions = 10 revolutions With this data, calculate the Period (T) of the rubber stopper in its "orbit".
*January 20, 2015*

**Physics**

A 500 kg car experiences a frictional force of 3080 N while turning, if the car is traveling around a turn of radius 17 m what is the velocity of the car?
*January 20, 2015*

**Physics**

A motorcycle has a mass of 250kg. It goes around a 13.7 m radius turn at 96.5 km/hr. What is the centripetal force? a. 2.95x10^3 N b. 4.31x10^4N c. 1.31x10^4 N d. 719N
*January 20, 2015*

**Physics**

A child swings from a rope of length L. If she starts her swing with the rope horizontal what is her acceleration at the bottom of the swing? a. 2gL^2 b. g/2 c. g d. 2g/l e. 2g
*January 20, 2015*

**Physics**

Abby is swinging a ball on a string in a circle with a constant tension. Which of the following quantities is constant? a. acceleration b. speed c. none of the others d. velocity e. force
*January 20, 2015*

**Physics**

A point on a wheel rotating at 5revs/s is located 0.20m away from the axis. What is the centripetal acceleration? a. 198m/s^2 b. .05m/s^2 c. 48m/s^2 d. 1.35m/s^2
*January 20, 2015*

**Physics**

A 500 kg car experiences a frictional force of 3208 N while turning, if the car is traveling around a turn of radius 16 m what is the velocity of the car?
*January 15, 2015*

**Physics**

A car driving at 99m/s can stop in 83 m. What is the smallest radius the car can safely travel at the original velocity?
*January 15, 2015*

**Physics**

A car driving at 93m/s can stop in 75 m. What is the smallest radius the car can safely travel at the original velocity?
*January 15, 2015*

**Physics**

A penny is placed on a disk that is rotating at 2 revolutions per second. The coefficient of friction between the penny and the disk is 0.4. What is the maximum radius at which the penny will stay on the disk? a. 2.5cm b. 100cm c. 1cm d. 10cm e. 25cm
*January 15, 2015*

**Physics**

A 200kg car is traveling at 50m/s on a level, circular track with radius 100m. What is the traction force required to keep the car on the track? a. 25000N b. 50,000N c. 10000N d. 2500N e. 5000N
*January 15, 2015*

**Chemistry **

How many moles of carbon are needed to react with 5.6 moles of hematite (Fe2O3)?
*January 8, 2015*

**Chemistry **

If 3.79x1024 formula units (molecules) of hematite react with excess carbon, what mass of iron will be produced?
*January 7, 2015*

**Physics**

A 0.0420-kg hollow racquetball with an initial speed of 18.3 m/s collides with a backboard. It rebounds with a speed of 7.4 m/s. Calculate the total impulse on the ball.
*December 21, 2014*

**Physics**

Two objects, one of mass 3kg moving at 2m/s, the other of mass 5kg and speed of 2m/s move towards each other and collide in a head on collision. If the collision is perfectly inelastic, find the speed of the objects after the collision.
*December 21, 2014*

**physics**

A projectile is fired at 12.5 m/s at an angle of 53.1 with the horizontal from a point 75m above the ground. A) How long does it take to reach the ground? B)What max height does it reach? C) What horizontal distance does it travel before striking the ground? D) With what ...
*November 2, 2014*

**Math**

Samantha made 9800 mL of fruit punch for a party, and she served the fruit punch divided equally in 5 pitchers. Her guests drank 2 pitchers of fruit punch. How many liters of fruit punch did Samantha have left over?
*October 19, 2014*

**chemistry**

Propane (C3H8) which is used as fuel in BBQ tanks often contains some butane(C4H10). A sample of a fuel mixture known to contain both propane and butane occupies a certain volume at a total pressure of 30 mmHg. The sample is then burned completely to produce CO2 and H2O. The ...
*October 17, 2014*

**chemistry**

A co-op student designed an experiment to collect hydrogen gas by reacting iron with a hydrochloric acid (HCl) solution. The student’s co-op supervisor suggested that aluminum can also be included to generate hydrogen gas: Fe + 2 HCl → 2 FeCl2 + H2 2 Al + 6 HCl &#...
*October 17, 2014*

**Pre-Calc**

1.) Describe how the graphs of f(x) = |2x| and g(x) = -|2x| are related. a.) All of these. b.) The graph of g(x) is a reflection of the graph of f(x) over the y-axis. c.) Non of these. d.) The graph of g(x) is a reflection of the graph of f(x) over the x and y axes. e.) The ...
*September 26, 2014*

**chemistry**

Oops I left a part of the question out: 2. Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes, leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 215 ng of ...
*September 23, 2014*

**chemistry**

Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes, leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 215 ng of mercury / mL, what is the total mass in ...
*September 23, 2014*

**chemistry**

if you need 50.0 grams of lead2 chloride how much magnesium chloride would you need?
*July 9, 2014*

**physics**

Determine the final velocity of a medicine ball that is dropped from a height of 7.00 meters. (assume air resistance is negligible) I don't understand how to solve this with only change in x. I imagine I am supposed to assume initial velocity is 0 m/s, but, even if that is...
*June 5, 2014*

**english**

The italicized word is "extremely." Would that be intensive?
*May 16, 2014*

**geometry**

The james family just put in a pool. It is 5 feet deep and has an 8 foot radius. They only want to fill the pool 5/6 of the way. What will be the volume of the pool once filled? I'm so confused...please help.
*May 13, 2014*

**Science**

chromosomes split apart from both "parents" then that set from the mother attaches to the set that the father gives off. (the chromosomes carry DNA)
*April 18, 2014*

**Math**

do the equations y=2x+3 and x=1-2y have common solution, no common solution or infinitely many common solutions?
*March 4, 2014*

**5th grade math**

In the multiplication problem at the right different letters stand for different digits, and ABC and DBC each represent a three digit number. What number does DBC represent? Two answer possible; give one
*March 1, 2014*

**trig**

a sailor on a boat 580 metres from the base of a vertical cliff sights the top of a lighthouse with an angel of elevation of 31 degrees
*February 26, 2014*

**Math Questions (AGAIN)**

I'm really confused with this!
*November 20, 2013*

**Math Questions (AGAIN)**

Hi! Someone was helping me earlier with these but their explanation was hard to understand. Can someone ELSE help me? Thanka! :) 1.) There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both ...
*November 20, 2013*

**Math**

Hi! I have 4 math questions! (: 1.) There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both Saturday and Sunday? 2.)In a shipment of alarm clocks, the probability that one alarm clock is ...
*November 20, 2013*

**12**

If cot £ = -9/2 with £ in Quadrant II, find sin £
*September 17, 2013*

**Math**

A team has won 50% of the 60 games it played, find the number of games the team must win in succession to increase its winning percentage to 60%?
*May 15, 2013*

**Ms.Sue**

Thank you sooooooo much for your help.You're awesome!
*April 25, 2013*

**Ms.Sue**

The options are 3G-30 3G+30 30g+3 30g-3
*April 25, 2013*

**Ms.Sue**

It doesn't give me that as an option.I have another question. Write an situation that can be represented by 6n+4. Is this right? Brooke has n number of coins that are worth $6 each.If she also has 4 dollar bills in her purse,how much does she have in total?
*April 25, 2013*

**Ms.Sue**

I think it is 3G+30. I can't figure out the situation problem.I'm good at subtraction situations but I keep drawing a blank on the addition.
*April 25, 2013*

**Ms.Sue**

Can you please help me?I think the first question I posted the answer is 3G+30
*April 25, 2013*

**Math **

Write a situation that can be represented by 6n+4.
*April 25, 2013*

**Math**

Ben conserves water in his home.He conserves 3 gallons each time he turns off the faucet when brushing his teeth.He conserves 30 gallons by running the dishwasher once a day instead of twice a day. What expression represents the total number of gallons,g,Ben saves each day? 3g...
*April 25, 2013*

**Ms Sue**

Thank you so much!
*April 24, 2013*

**Ms Sue**

Thank you.I didn't know * was multiplication.So, would I explain she is not correct because?I don't know how to answer the why part.I knew they would be different I just don't understand why.
*April 24, 2013*

**Ms Sue**

I'm just making sure that you knew I meant the x was multiplication.I don't understand why the a is not represented with a number.I was thinking that I would have to find what a equals.Thank you for helping me.
*April 24, 2013*

**Ms Sue**

I don't understand.Can you please explain it to me?
*April 24, 2013*

**Math**

Greta says that the expression (2xa)+5 is the same as 2x(a+5). Is she correct?Why or why not?
*April 24, 2013*

**math**

The profit (in millions of dollars) from the sale of x million units of Blue Glue is given by p= .7x-25.5. The cost is given by c= .9x +25.5 (a) Find the revenue equation. (b) What is the revenue from selling 10 million units? (c)What is the break-even point?
*April 9, 2013*

**Math**

The profit (in millions of dollars) from the sale of x million units of Blue Glue is given by p= .7x-25.5. The cost is given by c= .9x +25.5 (a) Find the revenue equation. (b) What is the revenue from selling 10 million units? (c)What is the break-even point?
*April 9, 2013*

**Rbowh**

Thank you so much!
*April 9, 2013*

**Rbowh**

On the second problem r+11=19 r+11-_=19-_ r=_ Would it be R+11=30=19-11 R=8
*April 9, 2013*

**To rbowh**

I don't understand how w-8+8=26+8.wouldn't the first blank be 0?
*April 9, 2013*

**To rbowh**

Was 34 right?
*April 9, 2013*

**Math**

34?
*April 9, 2013*

**Math **

I am really confused.i don't understand.please help me figure this out W-8=26 W-8+_=26+_ W=_
*April 9, 2013*

**Math**

I am really confused
*April 9, 2013*

**Math**

R+11=19 r+11-_=19-_ r=_
*April 9, 2013*

**Math**

W-8=26 w-8+_=28+_. W=
*April 9, 2013*

**History pls help **

Which of the following nineteenth-century inventors is associated with Menlo park in New jersey A. Alexander Graham Bell B. Thomas Alva Edison C. Cyrus W. Field D. Gustavus F. Swift
*April 5, 2013*

**chemistry**

Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
*April 2, 2013*

**PLS HELP**

I think B is the answer if you are looking for an opinion because not everyone would agree that a pet should be owned by all people. "A" is a fact because every pet depends on it's owner for life because it has to be fed and watered; "C" is a fact ...
*April 1, 2013*

**chemistry**

Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
*April 1, 2013*

**chemistry**

How to calculate the molarity of commercial bleach
*April 1, 2013*

**science**

wordy numbers: 622-4463 (let it do the work)
*March 14, 2013*

**Health**

What is the Affordable Care Act? A. A program that allows people who are at lower risk for chronic diseases to gain free memberships to gyms and fitness facilities. B. A program that covers diet counseling for people who are at lower risk for chronic diseases like diabetes and...
*March 2, 2013*

**Maths **

If eight 5p coins weigh 26g how much does three 5p coins weigh?
*January 31, 2013*

**Accounting**

Holly County needs a new county government building that would cost $24 million. The politicians feel that voters will not approve a municipal bond issue to fund the building since it would increase taxes. They opt to have a state bank issue $24 million of tax-exempt ...
*January 31, 2013*

**Algebra**

2 over 5
*January 29, 2013*

**Chemistry**

Using Werner Hesienbergs uncertainty principle delta x >h/ (4pie*m*delta v) when mass of electron is 9.11x10^-31kg what is the uncertainty in the position of an electron moving at 9x10^6 m/s with an uncertainty of delta v= 0.01x10^6m/s
*January 14, 2013*

**math**

47 lbs=kgs give answer in decimal form
*December 23, 2012*

**Calculus**

Find the equation of the tangent line to the graph of 4y^2− xy − 3 = 0, at the point P=(1,1)
*December 9, 2012*

**Chemistry**

Mr. DrBob222, would you mind explaining that a little more? I do not completely understand what is happening in the problem. Also, how do you know that Mg^2+ is half of OH^-?
*November 14, 2012*

**Math**

Jill made some cookies. Jill gave 1/4 of her cookies to Bob. Then Jill gave 1/2 of the remaining cookies to Joe. At this point, Jill had 18 cookies left. How many cookies did Jill have at first?
*November 7, 2012*

**science**

D=M/V D= 17/34 D= 1/2 or 0.5 g per cm
*October 23, 2012*

**math**

4(3)^2 = 4(9) = ?
*October 22, 2012*

**Math 8R - HELP! (homework qs. check)**

This is wrong. You were suppose to use the distributive property. Here, let me show you: -3(2+3x)+x-5 = -6+-9x+ x-5 Then, you combine like-terms: -6-5= -11 and then -9x+x= -8x Thus, your answer should be -11-8x. Hope I helped you a little bit.
*October 15, 2012*

**Language Arts**

No commas are needed around 1989.
*October 9, 2012*

**Science**

Strong.
*October 9, 2012*

**Math**

Assume that both Jane and Kathy start with 0 marbles. If Jane wins the first 15 games in a row, she will now have 15 marbles, and Kathy will have -15 marbles. This is because for ever game Jane wins, Kathy needs to hand over a marble. Jane cannot win anymore games. The goal ...
*October 3, 2012*

**math**

There are 6 people or hats in all. The key word in the problem is "in all".
*October 1, 2012*

**Earth science**

No. The sun is earth's source of energy.
*September 30, 2012*

**Algebra**

(9-4n)(-4)
*September 27, 2012*

**geometry**

loan officer
*September 25, 2012*

**Please help me!!!!!!!!**

this is due tonight
*September 25, 2012*

**Physics**

On some planet other than Earth a ball is thrown upward at a velocity of 22.3 m/s. It returns back to the exact position that it started at in 8.8s. What is this planets value for "g"? (
*September 25, 2012*

**Geography**

Formal are defined based on cold hard facts. Fuctional regions are organized around a focal point. Perceptional regions are reflected on human opinions.
*September 24, 2012*

**Physical education**

If you run almost everyday, then you will get use to it. I have P.E. since I was in kindergarten and now since I'm older I have to run a mile each Friday.
*September 24, 2012*

**Physics**

If a ball has an initial downward speed of 24 m/s, how far does the ball drop during the 4 s to 5 s interval?
*September 23, 2012*

**health**

Its D
*September 20, 2012*

**Math**

12 over 15 = Both can be divided by 3 so in simplest form, it would be 4 over 5 4 -- 5
*September 19, 2012*

**Math- INCOMPLETE**

What are the math problems?
*September 19, 2012*

**Physics**

7. A cat pushes a ball from a 7.00 m high window, giving it a horizontal velocity of 0.20 m/s. How far from the base of the building does the ball land? (Assume no air resistance and that ay= g = 9.81 m/s2.)
*September 14, 2012*

**Math- INCOMPLETE**

What is the question?
*September 13, 2012*

**math**

advice to finding all the factors of 110
*September 11, 2012*

**Physics **

A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.40 m/s2 for 14.0 s. 2. Maintain a constant velocity for the next 2.85 min. 3. Apply a constant negative acceleration of −8.39 m/s2 for 4.00 s. (a) What was the ...
*September 11, 2012*

**algebra**

Ops, Ms. Sue is right actually. I forgot to multiply 8 by 2
*September 8, 2012*

**algebra**

(x+8)2=32 2x+8=32 -8 -8 2x=24 divide each side by 2 x= ?
*September 8, 2012*

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