Thursday

July 31, 2014

July 31, 2014

Total # Posts: 614

**Algebra I**

"A car is traveling at r speed. A plane is traveling at 5r speed. When will they both reach 200 miles?"

**overview of teaching techniques**

8. Which one of the following guidelines should be followed when giving directions to students? A. Don’t allow students to choose the activity—make all decisions yourself. B. Require students to find their own background information and necessary materials. C. Permi...

**electrons in atoms**

What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 5 state to the nf = 3 state?

**Algebra**

How do you graph y=-1x

**classroom management techniques**

I read it but didnt understand your reasoning

**classroom management techniques**

14. Which of the following is part of the strategy of modifying behavior? A. Analyze the behavior that needs changing. B. Inform the student that he or she needs to change his or her behavior. C. Ignore students who demonstrate a need for attention. D. Ensure that the punishme...

**classroom management techniques**

Why do you choose 14. as D please explain

**classroom management techniques**

14. Which of the following is part of the strategy of modifying behavior? A. Analyze the behavior that needs changing. B. Inform the student that he or she needs to change his or her behavior. C. Ignore students who demonstrate a need for attention. D. Ensure that the punishme...

**enhancing chilfrens self esteem**

ThANK YOU MS SUE. It wa a great help thanks again. beth

**enhancing children's self-esteem**

thank you Ms. Sue With your renenforcement I passed my test. I got a 100% I can't thank enough for the help.

**enhancing children's self-esteem**

16. The best "measure" that a person has achieved high self-esteem is a. a record of strong academic performance b. confidence in a social situation c. self- sufficiency d. strong family relationships 10. When setting guidelines or rules for children and enforcing t...

**algebra**

If there are 5280 feet per mile, how many inches are there in 3 miles?

**Algebra**

How do you express the sum of 5y-3/9 and 2y-1/2

**maths**

The chance of getting a particular disease sometime during your lifetime is estimated at 1 in 20. Smoking increases the risk of developing the disease during your lifetime by 20%. How many people out of a group of 1000 smokers would you expect to get the disease sometime durin...

**algebra 2 review**

A training ring for horses is an oval formed from a rectangle with two semicircles on either end. Rounded to the nearest foot, how many feet of fencing is required to surround the entire ring with a fence?

**Algebra 2 review**

Bob and Latoya both drove to a baseball game at a college stadium. Bob lives 70 miles from the stadium and latoya lives 60 miles from it. Bob drove at a rate of 50 miles/hour and Latoya drove at a rate of 40miles/hour. If they both left home at the same time, who got to the st...

**Algebra 2 review**

In triangle ABC, the ratio of the measure of angle A to the measure of angle B is 3:5. The measure of angle C is 20 more than the sum of the measure of angles A and B. What is the measure of each angle in triangle ABC?

**physics**

Young's modulus for a rod is 4 X 4x10 to the 11th power. what strain will be produced by a tensile stress of 420 MPa? I don't know where to start with this...

**statistics**

2.28%

**Physics**

A 20 kg rod is 3 meters long and is attached to the wall by a hinge at point A and is held at the angle indicated by cable BC. Find the force in the cable and the forces in the x and y-directions at the hinge A. (center of mass in middle of rod downwards) There's a diagram...

**Chemistry**

How much water must be added to 24.0 grams of salt ot make a solution that is 12.0% by mass?

**chem**

wait.. im now stumped on this one Calculate the pH of each of the following solutions. [OH - ] = 1.1 10-11 M

**chem**

nvm i got it thanks anyways:)

**chem**

Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]

**chem**

Oh ok, thanks!

**chem**

Calculate the pH of each of the following solutions. (a) [H3O+] = 2.9 10-10 M- I got 9.5 but its wrong. I used the equation pH= -log[H3O+] Is this the wrong equation? (b) [H3O+] = 6.4 10-2 M thanks:)

**chem**

THANKS:)

**chem**

If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes the carbonate ion to carbon dioxide.) Do I ...

**Calculus**

Find the area of the region enclosed by one loop of the curve. r = sin(12θ)

**algebra**

how do I rewrite this 4ã20

**algebra**

divide 3z-18z z-6 10 55z

**algebra**

convert to decimal natation 8.93x10^7

**Physics=Please check**

Thank you for all your explanations-it really helped alot

**Physics=Please check**

I have an electrical circuit which has 20V shown on left side I=0.8A on top I = 0.3A on bottom I have to find the resistance Would I add 0.8 + 0.3 and then use the formula V = IR so it would look like this: 20V = 1.1A x R 20V x 1.1A = R

**algerbra**

how to solve 3a+2[2+3a(a-1)]=2(3a+4)

**Spanish 7th grade-please check**

How doyou ask if a friend if they are hungry? Tienes hambre? If they are thirsty Tienes sed? Both should have upside down question marks before question

**physics**

A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?

**math**

Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found that M'(x) = 3,600x−2 − 1 (3,600x−1 + x)2 . Estimate M'(10), M'(60), and M'(110). (Round your answers to seven decimal p...

**calc**

Evaluate the given expression. d dx [2(x2 + 3|x|)] 1

**calc**

Calculate dy dx . You need not expand your answer. y = (9x2 + x)(x − x2)

**calc**

Compute the indicated derivative. q(p) = 2.5 p + 3.2; q'(5) 1

**math**

The function gives the cost to manufacture x items. C(x) = 20,000 + 5x − x2 20,000 ; x = 20,000 Find the average cost per unit of manufacturing h more items (i.e., the average rate of change of the total cost) at a production level of x, where x is as indicated and h = 1...

** math**

thanks

**maths**

Make k the subject of the following two equations. 1) 8k+2=3(4k+t) 2)7k+11t=5-9kt

**Discrete Math**

f: A→B, g: B→A Is g ° f defined? If so, what is its domain and range?

**Maths**

Y is directly proportional to x If y= 10 when x=-5 what is the value of y when x =30. The answer should be a number.

**chemistry**

Calculate the mass for: A gold sample that absorbs 225 J to change its temperature form 15 degrees celsius to 47 degrees celsius.

**maths**

Suppose that y is directly proportional to x. If y = 10 when x = −5, what is the value of y when x = 30?

**math**

1 2 4 42 1882

**Ogle**

A string is cut in half, and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. how long was the string originally.

**chemistry**

if you react magnesium solution and lead powder together is there a temperature change?

**algebra**

y>=1 x>=5

**algebra**

(0,4),(-1,-3)

**algebra**

8x-(6x+7)=3 x =

**algebra**

5/4x+1/8x=5/8+x

**algebra**

3r-5s=-14 3r+3s-56

**maths**

Use a factor tree to write 1575 as a product of prime factors. You should display your factor tree in your answer.

**Maths**

Solve the equation 2x-5=7-6x Enter your answer as a fraction in its lowest terms in the box below using / for division. For example, enter as 5/2.

**com 155 week 6 help**

Students are often confused about the use of the words good and well in their writing. Write a 100-word passage to Scott McLean, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are wr...

**physics**

Consider a level flight turn of a propeller-driven airplane in which the airplane makes a complete circular turn in 1.6 min. If the plane's speed is 180 m/s, what is the radius of the circle? 1 m What is the centripetal acceleration of the plane? 2 m/s2

**Chemistry-Help!!!**

How many grams of chloride ions are in 2.5L of a 1.0 M calcium chloride solution?

**math**

Multiply and then simply by factoring (√2y)(√3)(√8y)

**Chemistry-Emergency**

What is the molarity of a 15% solution of Ni3Fe(CN)6?

**Chemistry-confused**

I have not idea how to work this problem without the grams or the ML of the solution!

**Chemistry-confused**

No, I'm having trouble figuring the molecular weight of it so I can then figure the molarity.

**Chemistry-confused**

What is the molarity of a 15%(w/v) solution of nickel (III) ferrocyanide? I can't figure out what nickel(III) ferrocynade is?

**Chemistry-urgent!**

Thanks!I get it now. Getting 250 mL just confused me because it was more than I started with, but that's what I want, just in a weaker concentration, right?

**Chemistry**

An aqueous mixture containing starch, NaCl, glucose and albumin is placed in a dialyzing bag and immersed in distilled water. Which of the following, correctly describes the location of the indicated substance after dialysis? A. albumin, inside B. starch outside C. albumin ins...

**physics**

if the static coefficient of friction in the ice rink between the floor and the skater's shoes is .2, how much pushing force can he supply before his boots will begin to slide?(the skater's mass is 120kg)

**chemistry**

Ammonia gas and carbon dioxide gas react to form aqueous urea (NH2CoNH2) and water. What volume of ammonia at 25 degrees celcius and 1.5 atm pressure is needed to produce 500 g of urea?

**history**

Assess the presidency of Thomas Jefferson. Do his actions in office coincide with his political philosophy?

**Physics**

first part, use a=rw.. so a=9.8(.227)

**chemistry**

The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)

**physics**

A block of mass 12.0 kg slides from rest down a frictionless 35.0° incline and is stopped by a strong spring with k = 1.50 104 N/m. The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest, how f...

**Chemistry**

Does the aufbau principle apply to radioactive isotopes?

**Chemistry**

Would the molecular ratio of the equation 4Na + O2 = 2Na2O be 4:2?

**Chemistry**

What is the molecular ratio of the following equation? HNO3 + KOH = H2O + KNO3

**Chemistry**

What is the molecular ratio in the following equation:H2O + SO3 = H2SO4

**6th grade**

Hey how do you turn 5/8 into a decimal??

**AP Chem**

The energy change H associated with the reaction NBr3(g) + 3H2O(g) -> 3HOBr(g) + NH3(g) is +81 kJ/mol rxn. These bond energy values might be useful: O-H 459 kJ/mol; N-H 386 kJ/mol; O-Br 201 kJ/mol. The strength of the N Br bond is 1. 4 kJ/mol 2. 465 kJ/mol 3. 66 kJ/mol ...

**AP Chem**

Consider the reaction 2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -685 kJ 2. -21,962 kJ 3. -1368 kJ 4. -2738 kJ 5. -5477 kJ 6. -26,521 kJ 7. -424 kJ 8. -1695 kJ

**AP Chem**

A student conducts an experiments to determine the enthalpy of neutralization for phosphoric acid reacting with sodium hydroxide. The student combines 25.0 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 degree C, in an open polystrene ca...

**social studies**

Does technology make it more or less likely that the U.S. will return to it's old policy of not taking part in world affairs?

**social studies**

why is the Northeast coast so crowded with cities?

**8th grade**

What is the meaning of seperation of powers

**calculus**

the graph of f(x) passes through the point (0,6). the slope of f at any point P is 2 times the y-coordinate of P. find f(1)

**Math**

-243/20 there is nothing more simple than that unless it's a decimal

**Math**

not sure about the question but maybe 9990 1 and 9990 5 and 1998 10 and 999 sorry if this was the wrong idea

**Chem**

If 20.0g acetylene is allowed to completeyl react with o@ how many g of O2 are reacted? 2C2H2 +5O2----4CO2 +2H20

**Physics**

How did you get that?

**Chemistry**

The Ksp of aluminum hydroxide is 5 x 10 -33.At what ph foes Al(OH)3 just begin to precipitate in a 0.15M solution of AlCl3?

**math**

how do i convert 0.79 to a fraction

**Physics **

Show that the pressure P of a gas can be written as: P= 1/3* p* v^2

**6th grade social studies**

need to find a place that has no culture so I can write an essay about it

**General Chemistry**

Given 115 grams of Na2SO4 find: a. the # of moles in sodium sulfate b. the # of moles in sodium ions Please explain all work and fully explain where each # came from. Thanks.

**elementary math**

What is half of one and a half cups?

**history**

what were the political and social outcomes of the end of the Vietnam War?

**medicine**

What is the main difference between a stem cell and a cancer cell? A. A stem cell grows at a faster rate than a cancer cell B. A stem cell obeys signals to stop growth, but a cancer cell doesn't C. A stem cell is usually external; a cancer cell is usually internal D. A ste...

**medicine**

A patient was admitted in an alternating state of mania and despair. What diagnosis does this statement describe? A. Obsessive-compulsive disorder B. Bipolar disorder C. Posttraumatic stress disorder D. Anxiety I'm not sure if it's B or D

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