Friday

April 18, 2014

April 18, 2014

**Recent Homework Questions About First Aid**

Post a New Question | Current Questions

**Grammar-clauses**

1. How comes it then that this her cold so great / Is not dissolved through my so hot desire, / But harder grows the more I her entreat? (“Sonnet 30") (1 point) (0 pts) apply warmth (1 pt) ask earnestly (0 pts) attempt to soften (0 pts) ignore 1 /1 point 2. That fire...
*Wednesday, December 11, 2013 at 12:48am*

**Help please!! For pre-calc**

the first one is simple, logx16=2 .... x becomes the base and the 2 becomes the exponent there fore x^2=16 and this becomes basic when solving for , put both x^2 and 16 under a radical and x=4
*Tuesday, December 10, 2013 at 8:50pm*

**math**

I'm sorry, Sam, but I goofed. Your first answer was right. It's 103.62.
*Tuesday, December 10, 2013 at 7:30pm*

**math**

No. Besides, your instructions tell you to estimate. When I estimate I first figure 10%. Then I double the 10%, and tip some amount between. 10% of 23 = 2.30 2.30 * 2 = 4.60 Estimate a number between 2.30 and 4.60
*Tuesday, December 10, 2013 at 5:38pm*

**Science help,Anyone?**

1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
*Tuesday, December 10, 2013 at 4:52pm*

**math**

You didn't set up a proportion. And your answer is wrong. First let's estimate the answer. 36% is a little more than 1/3. 3 * 108 = 324 Now the proportion. 36/100 = 108/x Cross multiply and solve for x.
*Tuesday, December 10, 2013 at 4:48pm*

**old man and the sea**

Why isn't Santiago prepared for the first shark attack? A. Because Santiago had not seen any sharks in these waters before. B. Because the shark comes up, almost out of nowhere, from the ocean depths. C. Because sharks are built to feed on all the fishes in the sea and ...
*Tuesday, December 10, 2013 at 3:35pm*

**algebra**

multiply the top equation by 3, and you have (assuming a typo in the 2nd equation) 9x+9y = 30 -9x-9y = -30 add them to get 0 = 0 So, the two equations are really the same thing. Any (x,y) that satisfies the first will also satisfy the second. 3x+3y=10 y = (10-3x)/3 So, pick ...
*Tuesday, December 10, 2013 at 2:08pm*

**English - help **

I just opened a savings account at the First Federal Bank Main Street Office. First Federal Bank is underlined. Choices: First Federal Banks First Federal Bank's First Federal Banks' I think it is B...?
*Tuesday, December 10, 2013 at 12:50pm*

**Math :)**

first, check the differences: 8.6 2.0 1.6 2.8 1.3 Doesn't look good, since there's no obvious slope. Is this a class in statistics, where you cover linear regression? The 62.5 looks like an outlier.
*Tuesday, December 10, 2013 at 12:10pm*

**Statistics**

Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85. The question states: In all, 135 students ...
*Tuesday, December 10, 2013 at 11:52am*

**statistics**

Multiple choice question that's hard to figure out and understand.(information provided) Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61,74,47,60,62,63,65,79,55,85. The question states: In all, 135 students ...
*Tuesday, December 10, 2013 at 11:51am*

**Algebra2**

I get (x,y,z) = (4, -1, -3) Your very first line is wrong. Should be 1-7, not 7-1 z = -3 The rest surely follows.
*Tuesday, December 10, 2013 at 11:20am*

**English**

I'm doing a presentation on these vintage advertisement. (.)vh1(.)com(/)celebrity(/)bwe(/)images(/)2010(/)08(/)Skype-Retro-Ad(.)jpg This advertisement was produced by a Brazilian advertising agency for Maximidia Seminar (a seminar on communication) on 2010. I need ...
*Tuesday, December 10, 2013 at 10:13am*

**Algebra2**

minus the first from the 3rd equation we get 3x-3x + 2y-2y + 3z -z = 7-1 2z = 6 z = 3 plug into the 2nd equation to get 5x+5y = 3-12 = -9 plug into the first equation to get 3x+2y = 4 Multiply the 2nd equation by 2 and the 1st by 5 10x+10y = -18 15x+10y = 20 minus first from ...
*Tuesday, December 10, 2013 at 9:45am*

**GEOMETRY CIRCLES **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*Tuesday, December 10, 2013 at 9:45am*

**grammar**

I think the first is better, since it preserves the tense in both clauses.
*Tuesday, December 10, 2013 at 6:11am*

**Geometry about the circles **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*Tuesday, December 10, 2013 at 5:14am*

**Math**

Find four consecutive integers, such that the product of the first and second integer minus 2 is equal to 3 times the product of the third and fourth integer.
*Tuesday, December 10, 2013 at 12:09am*

**Homework - Math**

just use the distributive property, as in 7(3+5) = 7*3 + 7*5 now just plug in 7a for the first, and you get 7a*5x^2 - 7a*2xy + ... 35ax^2 - 14axy + ... Try that, and if you get stuck, come back and show us where.
*Monday, December 9, 2013 at 10:57pm*

**statistics**

Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course. 61,74,47,60,62,63,65,79,55,85. In all 135 students took the exam. The third quartile for all 135 scores was 69. How many students had scores higher than 69?
*Monday, December 9, 2013 at 9:17pm*

**Chemistry(DrBob222)**

I don't know enough about what you did to answer; however, my first educated guesses are (1) the procedure is no more precise than that or (2) you're still learning the procedure.
*Monday, December 9, 2013 at 9:14pm*

**Math**

Well, first you have to find out how many are fielders. If 8 are pitchers and 5 are catchers, then the rest are fielders. Simply subtract 8 and 5 from 24. Then you take that number and subtract 5 from it. (Since difference means to subtract. And you're looking for the ...
*Monday, December 9, 2013 at 8:41pm*

**Physics(Help!!!!)**

b) Find Mu_s first Mu_s= (m_p/3 + m_l/2) *cotan (theta)/(m_p+m_l) a) Force = Mu_s*g(m_p+m_l) I don't know the rest.
*Monday, December 9, 2013 at 8:34pm*

**Science help,please...**

1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
*Monday, December 9, 2013 at 8:22pm*

**English**

How do you pronounce Tariq and Karim? Which syllabel do we have to stress in each proper noun? The first syllabl or the second syllable?
*Monday, December 9, 2013 at 8:10pm*

**Electromagnetics**

3.2 By the way, have you done question 4? because I did B=uo N/L I, I from the 3rd quest. but for "a big t" and N/L= loop density, but that wans't the aswer, any hint? And the first question???
*Monday, December 9, 2013 at 6:47pm*

**magnets**

and the first questoin?
*Monday, December 9, 2013 at 6:46pm*

**Gov**

Indecency is protected under the first amendment whereas obscenity isn't.. is it protected as freedom of expression?
*Monday, December 9, 2013 at 5:33pm*

**5th grade science**

Well, it is certainly not a property of electrons, protons, and neutrons - only electrons and protons, as neutrons have a neutral charge (so no charge whatsoever). Forgive me if I am incorrect here, but I do not believe that you can simply conduct 'current'. You can ...
*Monday, December 9, 2013 at 3:25pm*

**Mass Media**

The question is list and explain 3 public relation activities. Take a current news story and explain how each of these would be used.. I have the first part answered for 3 public relation activities 1) Research- Define the problem, Identify public, test concepts, monitor ...
*Monday, December 9, 2013 at 2:57pm*

**chemistry**

There is a fairly simple answer to this: The question states that you assume there are three magnesium isotopes. If Magnesium 24 has an abundance of 78.99%, and Magnesium 26 has a percent abundance of 11.01%, the percent abundance of Magnesium 25 is simple to calculate. The ...
*Monday, December 9, 2013 at 2:47pm*

**physics**

A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 0.6 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume the surface ...
*Monday, December 9, 2013 at 2:43pm*

**social studies**

the fact that copper and gray northern flint was found at the poverty point suggests that poverty point inhabitants a) used materials they mined from earthworks b) traded for goods from faraway places c) had the first indoor plumbing d) experienced a change in religious beliefs
*Monday, December 9, 2013 at 2:22pm*

**social studies**

which problem did bienville address first when he returned to serve as Louisiana governor a second time? a) food shortage b) indian relations c) lack of colonists d) money of shortage
*Monday, December 9, 2013 at 1:40pm*

**physics(URGENT!!!!!)**

Look at what Mum posted below my first response: Classical Mechanics Physics - Urgent help please - Mum, Monday, December 9, 2013 at 2:52am I don't want you to cheat so I am giving some hints - not full solution. As for part b - Damon gave you everything in his geometrical...
*Monday, December 9, 2013 at 6:34am*

**PHYSICS**

First Calculate the KE of the sledge hammer. 2: Calculate the speed of the Merry-go-round (MGR) from m1.v1+m2.v2=m1.v1'+m2.v2'. Note: v2 and v1' are zero 3: Calculate angular KE of the MGR 4: Lost energy =1-3 So if you can't solve this then you should go to ...
*Monday, December 9, 2013 at 6:15am*

**Geometry about the circles **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*Monday, December 9, 2013 at 5:21am*

**mechanics**

I refer to the verse 22:78. “And make jihad in God’s cause with true jihad. It is He who has chosen you, and has laid no hardship on you in religion; the creed of your forefather Abraham. It is He who has named you Muslims, in bygone times and in this [book], so that...
*Monday, December 9, 2013 at 4:26am*

**5th grade math**

Ms. Sue, Sorry. The question is If he puts the base and one of the sides together first, what fraction of the total board will he have used?
*Sunday, December 8, 2013 at 10:45pm*

**5th grade math**

This doesn't make much sense. Please correct this sentence and repost. If he puts the and one of the sides together first, what fraction of the total board will he have used?
*Sunday, December 8, 2013 at 10:23pm*

**5th grade math**

Derek is building a bird feeder to sell at a crafts fair. He is using a board that is 4 feet long. He will cut one piece that is 2 feet long for the base. Then he will use the rest of the board and cut it into two pieces of equal length for the sides. If he puts the and one of...
*Sunday, December 8, 2013 at 10:14pm*

**chemistry **

Q3: In the combustion reaction of 149g of propane(C3H8) with excess oxygen, what volume of carbon dioxide(CO2) is produced at STP? (note: balance the reaction first) C3H8 + O2 3CO2 + H2O
*Sunday, December 8, 2013 at 7:44pm*

**chemistry **

Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both energy and gas bubbles to help clear the drain clog. The reaction is: 2NaOH + Al + 6H2O 2NaAl(OH)4 + 3H2 (note: balance the reaction first) What mass of ...
*Sunday, December 8, 2013 at 7:43pm*

**math**

find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
*Sunday, December 8, 2013 at 4:42pm*

**Health (Ms. Sue)**

I like your first answer. As teens feel more independent, don't they sometimes rebel against their parents and teachers?
*Sunday, December 8, 2013 at 4:29pm*

**math**

find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
*Sunday, December 8, 2013 at 3:29pm*

**Math- Trigonometry**

The flowering of many commercially grown plants in greenhouses depends on the duration of natural darkness and daylight. Short-day plants, such as chrysanthemums, need 12 or more hours of darkness before they will start to bloom. Long day plants, such as carnations...
*Sunday, December 8, 2013 at 3:27pm*

**physics**

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 1.46 kg·m2 about its central axis, is set spinning counterclockwise (...
*Sunday, December 8, 2013 at 3:21pm*

**Classical Mechanics - Need Help Please**

hai BW I USED the above formula and i got b and c wrong i got negative value plz can u help m ???? this is my question A block of mass m= 2 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t...
*Sunday, December 8, 2013 at 1:34pm*

**chemistry**

The secret to these is to know where you are on the titration curve. First, find the equivalence points. There are three of them. Write the equation and balance it. Mols H3PO4 = M x L = ? mols KOH = mols H3PO4 that (look at the coefficients in the equation). mols KOH = M KOH/L...
*Sunday, December 8, 2013 at 1:12pm*

**Statistics**

Although you indicate n = 17, you only have 16 scores listed. Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard...
*Sunday, December 8, 2013 at 12:48pm*

**GEOMETRY CIRCLES PLEASE**

1. Make a sketch by placing the triangle on the x-y gird so that the altitude falls along the y-axis with (0,12) the top of the triangle and (0,) the middle of the base. Look at the righ-angled triangle in the first quadrant. You know the hypotenuse is 13 and the height is 12...
*Sunday, December 8, 2013 at 11:44am*

**PHYSICS IMP PLS**

You should use the equation dv = -v_ex*ln(m_f/m_i). You need to determine how much fuel is burned throughout the first 145 seconds, than substract that number from the initial mass to get m_f. After that, to find a, you need to find the derivative of the above equation. (You ...
*Sunday, December 8, 2013 at 11:14am*

**English**

Write complete sentence if the statement is a complete sentence. Write not a sententce if the statement is not a complete sentence. 1/. The author thought of a story. Complete sentence. 2/ Took place long ago. Not sentence . 3/ Her first day at school. Not sentence. 4/ She was...
*Sunday, December 8, 2013 at 10:41am*

**physics**

(a) Set up two equations. One for forces, one for torques. For the first equation, which way does friction act? i.e. which way would the yoyo move if there was slip? Since there is no slip, friction must be acting *against* the intended direction of motion. For the second ...
*Sunday, December 8, 2013 at 8:54am*

**GEOMETRY CIRCLES PLEASE**

HELP ME PLEASE. 1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to both...
*Sunday, December 8, 2013 at 7:48am*

**GEOMETRY CIRCLE **

1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to both circles. Given ...
*Sunday, December 8, 2013 at 5:18am*

**Classical Mechanics - Need Help Please**

A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume the surface ...
*Sunday, December 8, 2013 at 3:38am*

**PHYSICS IMP PLS**

time is not related for first part? in velocity formula there is no time, so we should not worry about 290s and 145s for first part? Thanks
*Sunday, December 8, 2013 at 2:00am*

**science**

Your first line could be Salt on your fries You'll find a lot more ideas in this site. http://www.ducksters.com/science/chemistry/sodium.php
*Saturday, December 7, 2013 at 10:04pm*

**us history**

African American troops in the Union army: A.were from the begining an itergral part of mnay fighting units. B.distinguished themeselves in battles in Louisiana. C. None of these I read first. And I came up with B. is this right.
*Saturday, December 7, 2013 at 8:38pm*

**math**

I had a total of 129 marbles in 3 boxes at first. Then i away 2/3 of the marbles from box1, added 15 marbles to box 2 and added somes to box 3 until the number of marbles in box 3 tripled. As a result, the ratio of the number of marbles in box 1 to the number of marbles in box...
*Saturday, December 7, 2013 at 8:25pm*

**Math**

Need help on this one. You have a spinner numbered 1 through 8. What is the probability of spinning a factor of 4 and a multiple of 2? I know the first part would be 3/8 * _ but them I'm not sure for the second fraction if it would be 4/8 or 2/8. Thanks
*Saturday, December 7, 2013 at 7:47pm*

**statistics**

Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance 95% = mean ± 1.96 ...
*Saturday, December 7, 2013 at 7:43pm*

**us history**

Nope. http://www.history.com/topics/battle-of-first-bull-run
*Saturday, December 7, 2013 at 7:37pm*

**us history**

The first major battle of the civil war took place at Vicksburg Manassas Antietam Shenandoah I chose Antietam. Right
*Saturday, December 7, 2013 at 7:33pm*

**Statistic**

Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance 95% = mean ± 1.96 ...
*Saturday, December 7, 2013 at 7:32pm*

**Calculus PLEASE HELP**

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do the second derivative ...
*Saturday, December 7, 2013 at 6:23pm*

**PHYSICS**

First, get all the variables: m_1: The mass of the merry-go-round m_2: The mass of the sledgehammer v_1: The velocity of the merry-go-round before the collision v_2: The velocity of the sledgehammer before the collision v_1': The velocity of the merry-go-round after the ...
*Saturday, December 7, 2013 at 5:48pm*

**mit physsics**

First, get all the variables: m_1: The mass of the merry-go-round m_2: The mass of the sledgehammer v_1: The velocity of the merry-go-round before the collision v_2: The velocity of the sledgehammer before the collision v_1': The velocity of the merry-go-round after the ...
*Saturday, December 7, 2013 at 5:47pm*

**Calculus**

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do the second derivative ...
*Saturday, December 7, 2013 at 4:01pm*

**math**

Ines became the manager of an electronics store. She decided to provide customers with a great holiday deal. A customer will be able to purchase 3 big screen televisions at the following price, the first one at the full price of $750, the second one will be discounted 45% and ...
*Saturday, December 7, 2013 at 12:51pm*

**GEOMETRY CIRCLES PLEASE**

1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to both circles. Given ...
*Saturday, December 7, 2013 at 11:26am*

**Physics Classical Mechanics**

A block of mass m=2 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=Beta t^2, where Beta = 1.0 N/s^2. We stop pushing at time t1, 5s [F(t)=0 for t>1]. (a) First, assume the surface is...
*Saturday, December 7, 2013 at 6:51am*

**Math**

Did you mean 2x - 5y = -8 for the first one ? I will assume that is what you meant: Personally I would not use substitution, but .... from the 2nd 26-3x = 2y (26-3x)/2 = y into the 1st: 2x - 5(26-3x)/2 = -8 times 2 to get rid of that fraction ... 4x - 5(26-3x) = -16 4x - 130...
*Saturday, December 7, 2013 at 12:28am*

**chemistry**

All you need to do is add the numbers. You can avoid confusion if you let the first number stand for atomic number and the secondone (on the right) stand for mass number. yXz + 18Ar40 ==> 19K43 + 1H1 y + 18 = 19 + 1 so y must be 2 Element 2 is He z + 40 = 43 + 1 so z must ...
*Friday, December 6, 2013 at 8:12pm*

**Chem 101**

The first numeber is the atomic number followed by the element symbol followed by the mass number; thus 26Co60 is Co 60 (Co is element 26). 92U235 + 0n1 ==> 38Sr94 + yXz + 3 0n1 Atomic numbers must add up. Mass numbers must add up. Therefore, 92 + 0 = 38 + y + 0. Solve for ...
*Friday, December 6, 2013 at 7:50pm*

**Pre-Calculus**

Solve the equation 2x + 5y - 3z = -1. Write the general solution as a matrix equation. I did some guessing and ended up getting this much: [x]= [-1/2 _ _ ] X [1] [y]= [ 0 1 0 ] X [s] [z]= [ 0 0 1 ] X [t] however I still can't figure out the last two values in the first row
*Friday, December 6, 2013 at 7:39pm*

**Math**

I Need Help With Two Questions The First One Is Find The Distance Between Riverside And Milton If They Are 12 Cm Apart On A Map With A Scale Of 4 cm : 21 Km And The Second One Is Oak Grove And Salem Are 87 Mi From Each Other . How Far Apart Would The Cities Be On A Map That ...
*Friday, December 6, 2013 at 7:31pm*

**Pre-Calculus**

I still don't really understand how to do it... I did some guessing and ended up getting this much: [x] [-1/2 _ _] [1] [y]= [0 1 0] X [s] [z] [0 0 1] [t] however I still can't figure out the last two values in the first row.
*Friday, December 6, 2013 at 7:00pm*

**i need help math**

Ines became the manager of an electronics store. She decided to provide customers with a great holiday deal. A customer will be able to purchase 3 big screen televisions at the following price, the first one at the full price of $750, the second one will be discounted 45% and ...
*Friday, December 6, 2013 at 5:49pm*

**Algebra**

in standard form we usually lead with the x term with a positive coefficient, so I wanted a +x as my first term, it was -x . to change a standard form to slope- yintercept form usually takes 2 steps: 1. move all terms except the y term to the right e.g. 4x - 5y = 8 ---≥...
*Friday, December 6, 2013 at 4:32pm*

**help**

first number ----> machine ----> 2nd number ---> machine ---> 3rd number ----> machine ----> 4th number = 271 Machine basically multiplies the number by 3 and subtracts 2. So we work backwards. 271 + 2 = 273. Divide it by 3 to get the 3rd number, 91. Do the ...
*Friday, December 6, 2013 at 4:17pm*

**Calc 3 PLEASE HELP!!!!**

f(x,y,z)=xyz & 2xy+2xz+2yz=1300 & 4x+4y+4z=200 FIRST, simplify constraints: g(x,y,z)=xy+yz+xz=650 h(x,y,z)=x+y+z=50 THEN, take gradient vectors: for ▽f=<yz, xz, xy>=λ▽g+μ▽h =<λ(y+z), λ(x+z), λ(x+y)>+<μ, μ, &#...
*Friday, December 6, 2013 at 3:42pm*

**Classical Mechanics Physics**

A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume the surface ...
*Friday, December 6, 2013 at 3:38pm*

**mit physyscs**

The first part is easy: change in momentum is impulse, which you can find by integrating F from 0 to your time. Now, what about b)?
*Friday, December 6, 2013 at 2:03pm*

**mit physyscs**

A block of mass 2 kg is initially at rest on a horizontal surface. At time , we begin pushing on it with a horizontal force that varies with time as , where 0.6 N/s . We stop pushing at time s [ for ]. (a) First, assume the surface is frictionless. What is the magnitude of the...
*Friday, December 6, 2013 at 10:26am*

**history**

http://www.google.com/#q=first+stirrings+of+the+first+Great+Awakening+took+place+in+
*Friday, December 6, 2013 at 7:16am*

**Chemistry**

A reaction is first order in A. If the rate constant of the reaction is 3.45x10^-3 s-1, what is the half life of the reaction? a. 4.98x10^-3 s b. 200 s c. 3.45x10^-3 s d. 100 s e. 1.73x10^-3 s
*Friday, December 6, 2013 at 1:17am*

**Chemistry**

The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1 b. 0.693 s-1 c. 0.0693 s-1 d. 0.144 s-1 e. 3.01 s-1
*Friday, December 6, 2013 at 1:14am*

**history**

The first stirrings of the first Great Awakening took place in A. the backcountry. B. New England. C. the Carolinas. D. Virginia.
*Friday, December 6, 2013 at 12:20am*

**math question grade 8!!**

First off, when you check the measurements, at least read what you wrote before. You had them listed as cm, not m! so, there are 4 walls: 2(4.8)(2.6) + 2(6.8)(2.6) = 60.32 m^2 and the ceiling: (4.8)(6.8) = 32.64 Subtract 5m^2 for the windows (presumably in the walls, not the ...
*Friday, December 6, 2013 at 12:12am*

**data management grade 12**

eight burglary suspects, two of whom are guilty, are placed in a line up. suppose that a witness is asked to identify the two guilty suspects but is unable to make a positive identification with any degree of confidence. if the witness feels compelled to identify two suspects...
*Thursday, December 5, 2013 at 11:37pm*

**data management **

a die is thrown twice. what is the probability that the sum of the rolls is greater than 9 given that the first roll is a 4?
*Thursday, December 5, 2013 at 11:17pm*

**math**

first round: x --> 3x --- >3x-2 2nd round: 3x-2 ---> 9x-6 ---> 9x-8 3rd round: 9x-8 ---> 27x - 24 ---> 27x - 26 27x - 26 = 271 27x = 297 x = 11
*Thursday, December 5, 2013 at 10:56pm*

**math**

Sam needs 15 dozen gingerbread cookies. he bakes 2 dozen the first day, 4 dozens the next day, 6 dozens the day after that and this pattern continues. How many days does it take Sam to get his 15 gingerbread cookies if half of each batch gets eaten each night by his family and...
*Thursday, December 5, 2013 at 10:14pm*

**math**

First, you would need to add 33+25 because you need to find the total number of marbles that are in the bag. algebraic expression: 33+25=x x=58 Next you would need to take the amount of blue marbles and make a fraction over the total amount. The fraction is 25/58. Therefore, ...
*Thursday, December 5, 2013 at 9:23pm*

**math**

First, you would need to add 33+25 because you need to find the total number of marbles that are in the bag. algebraic expression: 33+25=x x=58 Next you would need to take the amount of blue marbles and make a fraction over the total amount. The fraction is 25/58. Therefore, ...
*Thursday, December 5, 2013 at 9:22pm*

**Math-Trig**

1. The first thing you need to do is convert 60km to meters, or 10,000m to kilometers; whichever you prefer. Next,it helps if you draw a right triangle. The plane is at a height of 10,000m; this is the vertical leg of the triangle. It is 60 km away from the airport; this is ...
*Thursday, December 5, 2013 at 8:41pm*

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