Monday

January 23, 2017
Total # Posts: 831

**Algebra, easy problem**

Find the value of k so that the line containing the points (−4,1) and (k,−2) is perpendicular to the line containing the points (−9,5) and (−5,0).

*September 14, 2013*

**physics**

a crane drops a 1.0 kg steel ball onto a steel plate. the ball's speed just before impact is 2.0 m/s. if the average impact force is 300 N, and the ball is in contact with the plate for 0.01 seconds, what is the bounce back speed right after the impact.

*July 8, 2013*

**physics**

a cannon with mass of 2000kg fires a 10kg shell at an angle of 60 degrees above the horizontal. if the recoil velocity of the cannon across the level ground is 0.5 m/s what is the velocity of the cannon ball.

*July 8, 2013*

**physics**

a 1000 kg car with an average power of 100 kw accelerates from 0 to 50 m/s. how long does it take to accomplish this

*July 7, 2013*

**math**

___% of 3.75 =2

*May 31, 2013*

**math**

Solve for x sin2x=cos(x+30)

*May 19, 2013*

**Algebra**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 6,500 + 400 ln a (a ≥ 1) How many units are sold after spending $1,000? (Round your answer to ...

*May 9, 2013*

**math**

776÷ (1/4 + 1/5)

*May 3, 2013*

**chemistry**

How many grams of dichloromethane result from reaction of 1.60 of methane if the yield is 48.8 ?

*April 9, 2013*

**algebra**

use distributive property to factore each expression 42q - 21

*February 24, 2013*

**Physics**

I've been stuck on this equation for a while and I don't know if i'm missing a key part to the equation.. i just need help! If the gravitational field strength at the top of Mount Everest is 9.772 N/kg, approximately how tall (in feet) is the mountain? F= g ( m1 x ...

*January 21, 2013*

**math**

Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20 kilometers per hour?

*January 13, 2013*

**math**

Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20 kilometers per hour?

*January 12, 2013*

**math**

Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20 kilometers per hour?

*January 12, 2013*

**math**

Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20 kilometers per hour?

*January 12, 2013*

**chem**

calculate the surface energy of 100 surface of niobium. The enthalpy of atomization of niobium is 745 kj/mol. express anser inunits of j/cm^2

*January 11, 2013*

**chem**

(a) What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 âˆ˜C.

*January 11, 2013*

**intergrated math 1**

x2+7x+10

*December 14, 2012*

**AP Physics B**

system consists of a steal beam of mass M 68.4 kg and length L 1.84 m, with a 39.0-kg brass sphere attached at the right end of the rod, as shown below. BA a. Determine the moment of inertia of the system for rotation about an axis through the center of ...

*December 11, 2012*

**Math (trigonometry)**

Dnt knw

*December 2, 2012*

**Physics**

Thanks so much Elena !

*November 18, 2012*

**Physics**

answers in the back of the book are 6.9 x 10^-5 cm and 1.13 x 10^5 Hz

*November 18, 2012*

**Physics**

A film of magnesium fluoride (n=1.38), 1.25x10^-5 cm thick, is used to coat a camera lens (n=1.55). Are any wavelengths in the visible spectrum intensified in the reflected light? ---------------------------------------- Bats use the reflections from ultra-high frequency sound...

*November 18, 2012*

**Social Studies**

Thanks so much Ms. Sue! I definitely understand #1 with your example.

*November 2, 2012*

**math**

Shelly sews a blanket that has an area of 170 square feet. it has 30 square blocks, each the same size. What is the approximate length of each side of a block. a. 1 foot b. 2 feet c. 3 feet d. 4 feet I doubled checked and the problem is correct. I just can't figure it out.

*October 30, 2012*

**Finance**

Maybe....?

*October 25, 2012*

**Social studies**

I am learning about scarcity in my SS 6th grade and I am unsure about this question. Which sentence best tells the effect of scarcity on economics? A. Scarcity shapes decisions about how to distribute goods B. because resources are scarce consumers buy fewer goods C. Scarcity ...

*October 23, 2012*

**Political Science**

What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?

*October 14, 2012*

**Science/chemistry**

Is PO3 a mixture or compound. Is MgCl a mixture or compound. Thanks

*October 14, 2012*

**Math**

A certain computer can perform 10 to the 5th power calculations per second. How many calculations can it perform in 10 seconds?

*October 11, 2012*

**Math**

If f(x)=ax^2+b f(-3)=-3 and f'(-3)=2 find the coefficients a and b.

*October 11, 2012*

**Algebra 2**

13/17

*October 10, 2012*

**Algebra 2**

The Denominator of a fraction exceeds the numerator by 4. When 3 is added to both the numerator and denominator, the fraction becomes 4/5. Find the fraction.

*October 10, 2012*

**Political Science**

What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?

*October 10, 2012*

**Physics**

Marcy and joe are racing on their bikes. Starting from rest, if Marcy has an average acceleration of 5.7 m/s? for the first five seconds how fast was he traveling at the end of those five seconds?

*September 26, 2012*

**Language Arts**

What are the following sentences. 1. - Isn't it time for the ircus to come to town? - Interrogative sentence 2. Buy a ticket for each of us. - Imperative sentence 3. Should I get tickets for this weekend? Interrogative sentence 4. Check to see if everyone can go then. ...

*September 10, 2012*

**chemistry**

How much ethanol is required to make a 2L of a 70%ww solution?

*July 28, 2012*

**geometry**

Find the similarity ratio and the ratio of perimeters for two octagons with area 18 square inches and 50 square inches

*July 18, 2012*

**math**

compute the value of 0.2^-4 express answer numerically

*July 7, 2012*

**chemistry**

What is the wavelength of a photon that has an energy of E = 4.01×10^-19J ?

*July 7, 2012*

**Math**

The sum of the ages of a brother and sister is 27. If four times the brother's age is subtracted from three times the sister's age, the difference is 11. Express your answer in terms of the symbols b and s. 27=?

*July 7, 2012*

**math**

Julie spent $50 on a book. The cost of the book was $24 less than twice what she spent on a backpack. How much did the backpack cost?.

*July 7, 2012*

**chemistry**

what mass NaOH is required to react exactly with 25.0 ml of 3.0 M H2S04

*July 1, 2012*

**algebra1**

factor: 64a^2-48a+9

*June 30, 2012*

**Accounting**

What account class would cash prize payment be under? A. Operating expense B. Cost of Goods Sold C. Asset D. Expense E. Liability I'm stuck between A, B, D. Help. thanks.

*June 14, 2012*

**Math**

The ratio of the cost of an adult ticket to a student ticket for the circus is 5:3. If $32 is the total spent on tickets, how much was each adult ticket and how much was each student ticket?

*June 3, 2012*

**Physics**

Why does a transformer require alternating voltage?

*May 28, 2012*

**Physics**

a. In which case will there be more current in each of three lamps - if they are connected to the same battery in series or in parallel? b. In which case will ther be more voltage across each lamp?

*May 19, 2012*

**MACRO 2 ECON**

2.4 (Investment and the Multiplier) This chapter assumes that investment is autonomous. What would happen to the size of the multiplier if investment increases as real GDP increases? Explain. LO3 3.1 (Shifts of Aggregate Demand) Assume the simple spending multiplier equals 10...

*May 15, 2012*

**algebra**

Break-Even Analysis: A Look at Profit and Loss: As an entrepreneur, there are going to be many decisions that you need to make, such as the price to charge your customers for your goods and services. You have just graduated from college and recently opened a specialty pizza ...

*May 11, 2012*

**english**

infinative

*May 3, 2012*

**english**

elliptical clause ?

*May 3, 2012*

**english**

okay and the next one is 3.Put the sizes on the uniforms while sorting them out. and the italicized is sorting them out,can only be adverb clause infinitive phrase past participial phrase elliptical clause adjective clause

*May 3, 2012*

**english**

these are the choices that it can be adverb clause infinitive phrase past participial phrase elliptical clause adjective clause

*May 3, 2012*

**english**

not changed at all is italicized

*May 3, 2012*

**english**

okay thank you here's the next one 2.Although her personality had not changed at all, Megan looked quite different. i know its not a adjective clause

*May 3, 2012*

**english**

so it would be a past or present participle?

*May 3, 2012*

**english**

so that's not the grammatical structure of it? but doesn't it have a gerund in it?

*May 3, 2012*

**english**

so did i get it right??

*May 3, 2012*

**english**

okay and the question is asking what is the grammar function of the italicized words or phrase

*May 3, 2012*

**english**

am i right?

*May 3, 2012*

**english**

if the remaining turbulent,will be postpone our canoe trip and i think its prepositional phrase with a gerund?

*May 3, 2012*

**english**

remaining or turbulent

*May 3, 2012*

**english**

need help on italicized portion of the sentence? 1.The weather remaining turbulent, we will postpone our canoe trip.

*May 3, 2012*

**geology**

its compressed air so when you let it out it spreads and is cold

*May 3, 2012*

**Physics**

If you do 12 J of work to push 0.001 C of charge from point A to point B in an electric field, what is the voltage difference between points A and B?

*April 30, 2012*

**Spanish**

Prefiero usar una guia para que no me pierdo. I prefer to use a guide so that I won't get lost. Is the spanish translation for the sentence correct? IF not please help me correct it. Thanks.

*April 25, 2012*

**Spanish**

Yo sé jugar en equipo. What does this mean? Help please. Thanks.

*April 24, 2012*

**Chemistry 1201**

The decomposition of 3.32 g CaCO3 results in an actual yield of 1.24 g of CaO. What is the percent yield of calcium oxide for this reaction? CaCO3(s) → CaO(s) + CO2(g)

*April 15, 2012*

**critical thinking test AU**

All sages provide both wisdom and inspiration. Since Dasha’s speech contained wisdom and greatly inspired her audience, Dasha is a sage. Which one of the following points out the flaw in the argument above? (Points : 1)

*March 12, 2012*

**chemistry**

how many orbitals are in the 6p sublevel? I wrote 6 but I want to make sure I am doing this right.

*February 8, 2012*

**Calculus**

y = square root 256- x squared, from 7 to 16 about x axis

*February 2, 2012*

**chemistry**

1. Would it be advisable to determine the freezing point of pure p-dichlorobenzene with one thermometer and the freezing point of the solution with a different one? Explain. 2. If 0.150 mole of a nonvolatile non-electrolyte solute is present in 1200g of water, what are the ...

*February 2, 2012*

**chemistry**

how many grams of oxygen are needed to create 437 liters of gas?

*January 30, 2012*

**physics**

A car is traveling at Vx =20 m/s. The driver applies the brakes, and the car slows with ax = -4m/s^2. What is the stopping distance

*January 29, 2012*

**Chemistry**

For the reaction below, an analysis of an equilibrium mixture is performed at a certain temperature. N2(g) + 3 Cl2(g) 2 NCl3(g) It is found that [NCl3(g)] = 1.9 10-1 M, [N2(g)] = 1.4 10-3 M, and [Cl2(g)] = 4.3 10-4 M. Calculate K for the reaction at this temperature.

*January 8, 2012*

**Physics**

Point A revolves counterclockwise around a point, making 25 complete rotations in 8 seconds. If A is 3 cm away from its center of rotation, what is the angular velocity of A to the nearest tenth

*December 16, 2011*

**statistic**

Could you show me how to find the five levels in a Hof o and reject the null problems?

*November 29, 2011*

**psy.**

high on the stable and enduring personality disposition known as extraversion.

*November 21, 2011*

**statistics**

A manufacturer wishes to estimate the reliability (in months) of a certain product. An estimate of the population standard deviation from a previous sample was 12 months. If the manufacturer desires to be within 4 months of the true value with approximately 80% confidence, ...

*November 8, 2011*

**math**

31 x 19 array and an expanded algorithm

*November 3, 2011*

**busn 319**

Explain the planning phase and its three steps. Explain the implementation phase and its four components. Explain the evaluation phase.

*October 25, 2011*

**History**

This site is for homework help, please don't spam with unnecessary questions. Google is your friend.

*October 17, 2011*

**accounting**

Billed patients for services rendered of $3,500. journal entry help.... is this account payable, debit, credit.etc.....(on journal entry )

*September 28, 2011*

**algebra**

a rectangular garden 70 m wide and 100 m long is to be enclosed by a face.if the face posts are placed evey 10 m how many posts will be needed?

*September 9, 2011*

**parts of speech**

How many players are on a team?

*September 4, 2011*

**math**

Tommy, Shawn and Ricky had a total of 192 picture cards. In a game, Tommy lost some picture cars to Shawn and Shawn’s picture cards doubled. Shawn in turn lost some picture cards to Ricky and Ricky’s picture cards doubled. Then they each had the same number of ...

*August 23, 2011*

**math**

David and Marie had $300 altogether. After David spent 2/5 of his money and Marie spent $20, they each had the same amount of money. How much money did Marie have at first?

*August 23, 2011*

**Algebra**

13/17

*August 11, 2011*

**Calculus 2**

The volume of the solid generated by revolving the region about the given line. above the curve y=3 below the curve y=sqrt of 3x on the left by the y-axis the line y=3

*August 3, 2011*

**Chemistry**

What is the concentration of NaNO2 if 2.13g of N2O3 is added to excess NaOH and the resulting solution is diluted to a total volume of 500.0 mL?

*July 17, 2011*

**Calculus 2**

Use the Midpoint Rule to approximate the integral (–10x+(7(x^2))) from 10 to 17 with n=3

*June 28, 2011*

**hoke county**

o A few minutes later, Susan tells Molly that she doesn’t like their coworker, Karishima, because she can’t understand half of what she says due to her accent. Molly agrees with Susan, and they both begin to laugh about Karishima’s clothing, and how it is so ...

*June 17, 2011*

**hoke county**

o A few minutes later, Susan tells Molly that she doesn’t like their coworker, Karishima, because she can’t understand half of what she says due to her accent. Molly agrees with Susan, and they both begin to laugh about Karishima’s clothing, and how it is so ...

*June 17, 2011*

**ashford unversity**

1. Susan and Molly, employees in a busy call center, are chatting at lunch. Between bites of fried chicken, French fries, high calorie soda, and a tiny salad, Susan begins to complain to Molly that she can’t seem to lose weight and that she is tired all of the time. They ...

*June 17, 2011*

**English**

Let's divide the work between the three of us

*June 16, 2011*

**algebra**

Find the y-intercept and the x-intercept for the equation-25x+y=15 What is the y-intercept? (Type an ordered pair) What is the x-intercept? (Type an ordered pair. Type integers or fractions for coordinates.

*May 24, 2011*

**math**

crime waves

*April 25, 2011*

**Math**

I have more than 9 but less than 16 marbles. There are half as many red as blue. There are two more green than blue. There is an odd number of yellow. What do I have

*March 13, 2011*