Saturday
October 25, 2014

Posts by Matt


Total # Posts: 1,884

statistics
A professor is interested in determining whether assigning mandatory homework affects students’ grades. He is currently teaching two sections of the same class; in one class, he assigns mandatory homework problems, while in the second class, he just recommends homework ...
October 24, 2014

statistics
A health psychologist, who is interested in childhood obesity, thinks that there may be a relationship between daily television viewing and eating habits. Data is collected from 500 children; for each child, information is collected on the number of hours of daily television ...
October 24, 2014

statistics
Researchers investigated the effects of encoding conditions on subsequent memory for a list of words. Participants were assigned to one of three encoding conditions: 1) saw list of nouns they were asked to remember (word alone condition), 2) list of words was accompanied by a ...
October 24, 2014

physics
A 1075 kg van, stopped at a traffic light, is hit directly in the rear by a 705 kg car traveling with a velocity of +2.06 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of ...
October 23, 2014

Math help
Please answer this 1 question!! 1.Which could be the name of a point? A. EF B. k C. Q D. MN
October 21, 2014

Chemistry
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 114.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.400 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the ...
October 19, 2014

Physics
A bullet is fired from a rifle that is held 2.5 m above the ground in a horizontal position. The initial speed of the bullet is 1450 m/s. Find: (a) the time it takes for the bullet to strike the ground and (b) the horizontal distance traveled by the bullet.
October 17, 2014

Math 116
Well, you could say: since every square is a rectangle 'because it is a quadrilateral with all four angles right angles,' therefore the area didn't change.
October 14, 2014

Math
hint exterior angle is 360, minus 120 subtract total degrees of triangle
October 14, 2014

c programming
string[] dDate = dob.Split('/'); string dDay = dDate[0]; string dMonth = dDate[1]; string dYear = dDate[2]; if (Convert.ToInt32(dDay) > 01) { if (Convert.ToInt32(dMonth) == 01 || Convert.ToInt32(dMonth) == 03 || Convert.ToInt32(dMonth) == 05 || Convert.ToInt32(...
October 14, 2014

Chem
If not all the alum dissolves in the water before adding the Ba(NO3)2 solution, what effect will this have on the sulfate percent error determination?
October 12, 2014

Chemistry
How much heat would you need to melt 20.0 L of ice that had frozen on a fruit tree.
October 11, 2014

math
2 times
October 11, 2014

math physics
you forgot gravity
October 9, 2014

@someone who can show me how to do this
*infinite
October 9, 2014

@someone who can show me how to do this
infinate if x=1, then 6(1)+y=-3 6+y=-3 move the six y=-3+(-6) y=-9 or if x=-2, then 6(-2)+y=-3 -12+y=-3 subtract the twelve and add to the other side y=-3+(--12) two neg = positive thus y=-3 + 12 y=9
October 9, 2014

physics
5ms+16=21ms initial velocity (io) the delta v(t)=(ending velocity-io)/total deceleration time = (t)f/s^2 Thus, change in velocity = a t 0-21 = (t)f/s^2 second to top = t and therefore: d = Vi t + (1/2) a t^2
October 9, 2014

chemistry
First, find out how many moles of hydrogen there are Then, use Avagadro's Constant to find out how many atoms there are.
October 9, 2014

economics
ps is the difference between the amount that producers actually receive and the minimum amount that they would have to receive in order to supply the given level of output. On a graph, ps can be shown as the area above the supply curve and below the prevailing market price.
October 9, 2014

chemistry
the actual mass (g) = Number of moles x Molar mass, or m = n x M Number of moles of solute = Concentration (mol. L) x Volume of solution (liters) -1 or n = C x V
October 9, 2014

economics
that should have been answered in your other question
October 9, 2014

Chem 30 Thermodynamics
your temperature increase -or decrease- is given by the specific heat (S) of the object. (s)pecific heat = (new temp)/mass*change in temp. or if youre crazy, calculate the actual change in temp = heat added/(mass x specific heat) and compare it to actual (known) heat capacity ...
October 9, 2014

math
Trick question...you have 9 blocks!
October 9, 2014

physics
Use the third equation of motion velocity to displacement Your initial velocity is 15m/s Your final velocity is 0m/s displacement is 0m substitute the values and solve time
October 9, 2014

physics
If you don't have laminar flow, then you need to figure Quadratic Drag, drag force is proportional to the square of velocity and to the cross-sectional area of the object. For which you'll need to id the correct Reynolds Number
October 9, 2014

physics
given laminar flow, the drag force is proportional to the radius of the sphere and to its velocity. Double the radius, double the drag force. Double the velocity, double the drag force. This is known as Stokes Drag
October 9, 2014

science
yup
October 9, 2014

physics
Work=mgh
October 9, 2014

pre calculus
cscB - sinB = 1/sinB - sinB = (1 - sinB*sinB)/sinB = (1 - sin^2B)/sinB = cos^2B/sinB = cosB*(cosB/sinB) = cosB(cotB)
October 9, 2014

math
6500-2500=4000 4000/2=2000 2500+2000=4500 or 6500-2000=4500
October 9, 2014

math
6
October 9, 2014

Abnormal Psychology
youth/adults
October 9, 2014

math
a total of 4 km in one hr. if she did at the same rate that would be 4 kph Time=distance/walk speed + distance/run speed (ie. walk * 2) T(x)=D/X + D/X*2
October 9, 2014

computer science programming
def sum(number): # we are defining a function a = 0 #defines a = 0 becuase we start at 0 in python sum=0 # defines sum at zero because we start at 0 while a<checked_input: #check everytime if the a is redefined if it still is true sum = sum + (a+1)#combination of this line...
October 9, 2014

computer science programming
what language?
October 9, 2014

3rd grade math
35/5=7
October 9, 2014

Econ
Since quasilnear preferences is a special case of a utility function Then... u(x,y) = v(x) + y Taking the derivative and setting to zero, a condition for maximizing utility is v’(x) - p = 0 or p(x) = v’(x) p(x) vs x as inv demand function
October 9, 2014

Physics
Horizontal direction : IF angle is measured from y axis (vertical line) -> a(horizontal) = Fsin(32)/m IF angle is measured from horizontal -> a(horizontal) = Fcos(32)/m Vertical direction: [ here positive a means acceleration down, negative a means up] IF angle is ...
October 9, 2014

physics
The Temperature Coefficient of Copper (near room temperature) is +0.393 % per o C. This means if the temperature increases 1o C the resistance will increase 0.393%. does that help?
October 9, 2014

Physics
9.8 ballM/s^2
October 8, 2014

Math: ALGEBRA
How to solve this??? Solve for x. a+b= a+xy Solve for w. 2w+2h+L=p Solve for r. r(s+t)=u
October 8, 2014

Math: ALGEBRA
Omg thanks herp_derp
October 8, 2014

Math: ALGEBRA
How to solve this??? -1-8(x+12)> -44-8x -4(-12v-9)+6(-6+5v)> -4v+12v
October 8, 2014

math plz help
a
October 8, 2014

CHEM 111
There are rules governing when a double displacement reaction actually takes place. Mixing these two solutions results only in a solution containing a mixture of Na+, NH4+ PO4 3- and Cl- ions. There is no reaction product. IE. the net ionic equation. This is not possible ...
October 8, 2014

CHEM 111
no reaction product
October 8, 2014

finance
interest rates dropping at 6% a year for 10 years?
October 8, 2014

math
divide by .66
October 8, 2014

algebra
50/3.6=13.8 lb
October 8, 2014

Science 8
2nd llaw: For example, you may realize, when looking for a car that the miles per gallon of a sports utility vehicle is always lower than that of a standard car. The reason behind this is explained in Newton’s Second Law. The mass of a sports utility vehicle is much ...
October 8, 2014

Finance
sorry about that, if the contract period is 12 months or less in duration, or if the contract produces a single outcome it's based on annual funding...otherwise incremental funding so A
October 8, 2014

Finance
appropriations are subject to the Annual Funding Policy...so B
October 8, 2014

HEALTH
yea
October 8, 2014

Science
metals/ceramics
October 8, 2014

physics
4π²R³ = T²GM and V²R = GM, where R = radius of orbit in metres, T = orbital period in seconds, V = orbital speed in m/s, G = gravitational constant ≈ 6.673×10−11 Nm²/kg², M = mass of Earth ≈ 5.98×1024 kg
October 7, 2014

science
nebular aggregation
October 7, 2014

science 1 question
last one is not significant, as 0 add's nothing to the data
October 7, 2014

science 1 question
343.2
October 7, 2014

SS
island/continent, desert/ocean, mountain/canyon
October 7, 2014

Physics
no takers?
October 7, 2014

Physics
also, any ideas of finding the exact gravitational force / gravitational acceleration data for my location?
October 7, 2014

Physics
I need to determine maximum tension/down force with a pendulum. I need to use the lightest string possible to: -support a 16kg bob, with -a velocity of 4m/s -with a swing radius of 2m -at it's equilibrium (ie 0 degrees) -given standard gravity. using T=m(V^2/r)+(g*cos(x)) ...
October 7, 2014

geometry
For every 10 yards on a football field, there is a boldly marked line labeled with the amount of yards. There are two parallel sidelines on each side of the field. If the 50 yard line is perpendicular to one of the sidelines, what is its relationship to the other sideline?
October 2, 2014

CHECK PLEASE
-_-
September 30, 2014

CHECK PLEASE
Find the best word to complete the sentence. 1. specter 2. specimens 3. reiterate 4. refuted 5. vigilant 1. Find the best word to complete the sentence. In Charles Dickens's A Christmas Carol, the ___ of Jacob Marley returns from the grave to haunt his business partner, ...
September 30, 2014

History
prophets
September 25, 2014

statistics
Slf-Esteem Scoresdepression Scores Mean 3.43 15.78 StrdDev 0.75 10.34 13. The above chart contains the means and standard deviations for self-esteem scores and depression scores. Using this information and the most likely correlation coefficient obtained in Question 12 (-.76...
September 25, 2014

CHECK MY ANSWERS PLEASEEE
Please and thank you :D 1.A 2.B 3.B 4.B 5.B 6.C 7.C 8.B and C 9.D 10.B 1.Who is most likely to study written records? A.historians B.archaeologists C.geologists 2.Which is a primary way an archaeologist would decide where a temple stood? A.evaluating clues on clay tablets B....
September 25, 2014

Math-calculus
At a certain point on the beach, a post sticks out of the sand, it's top being 76 cm above the beach. The depth of the water at the post varies sinusoidally with time due to the motion of the tides. The depth d is modeled by the equation d=40+60cos(PI/2(t-2)) where t is ...
September 24, 2014

HELP
Shane's seats at the concert were so far from the stage that he could not ____________ who was the lead singer and who was the guitarist
September 23, 2014

CHECK PLEASE
11.abhor : detest 12.infraction 13.resolute 14.infringe 15.abound 11.Find the pair of words that has the same kind of relationship as the numbered pair. abscond : flee :: A. ascertain : forget B. concise : cut C. discern : hide D. abhor : detest 12.In India, mistreatment of ...
September 23, 2014

CHECK PLEASE
The ones with ** ** around the answer choices is what I picked 1.Find the best word to complete the sentence. Because of the camera's precision, linesmen at national tennis competitions are now ___ from error in determining if a ball lands in or out of the court. A.**...
September 22, 2014

CHECK PLEASE
Please check my answers...the ones with ----then a answer choice (is my answer) 1. Find the best word to complete the sentence. My brother clung ___ to his belief that Alfred Hitchcock was the greatest film director of all time. (Points : 1) coherently ineptly -------...
September 22, 2014

Physics
does the mass always have to be in kilograms? If it is not, do we convert it to kg?
September 21, 2014

Physics
So the answer is 29.4? Our mass is 10.0 kg right?
September 21, 2014

Physics
If a block of mass 10.0 kg rests on a horizontal surface, and the coefficient of static friction is 0.300, what is the maximum static friction that can act on the block? If you could walk me step by step on completing this problem, I would be extremely grateful and it would be...
September 21, 2014

Adverb objects 2 Check please
6.B 7.C 8.A 9.B 10.B 6.Which words make up the adverb phrase in the sentence? Which word does the adverb phrase modify? After sunset the pack of coyotes howled loudly. A. howled loudly modifies coyotes B. the pack of modifies coyotes C. After sunset modifies howled D. coyotes ...
September 19, 2014

Adverb Objects CHECK PLEASE
Thanks...I will post my other set
September 19, 2014

Adverb Objects CHECK PLEASE
Thanks for checking my answers 1. D 2. C 3. C 4. C 5. D 1. Which words make up the adverb phrase in this sentence? After his speech,the politician greeted his supporters. A. his supporters B. greeted his C. the politician D. After his speech 2. Which words make up the adverb ...
September 19, 2014

physics
an object has a weight of 5.10 Newtons at sea level, where the acceleration due to gravity is 9.81 m/s squared. What is the acceleration due to gravity on the object if it is placed in a spaceship 1,000 km above sea level which gravity exerts a force of 3.81 Newtons on the object
September 19, 2014

3 Direct Objects questions CHECK PLEASE
THANK U I LOVE U !!!!
September 17, 2014

3 Direct Objects questions CHECK PLEASE
8.B 9.B 10.D 8.Which word in the sentence is the direct object? The vibration brings worms up to the surface. A.up B.worms C.vibration D.surface 9.Which word in the sentence is the direct object? Last week, the restaurant served three hundred meals. A.week B.meals C.three D....
September 17, 2014

Direct objects 2 Check please
Here is the rest 8.Which word in the sentence is the direct object? The vibration brings worms up to the surface. A.up B.worms C.vibration D.surface 9.Which word in the sentence is the direct object? Last week, the restaurant served three hundred meals. A.week B.meals C.three ...
September 17, 2014

Direct objects 2 Check please
sorry...WHY DOES THIS KEEP HAPPENING TO ME
September 17, 2014

Direct objects 2 Check please
Please check this is the last set of 5 questions thanks :D 6.A 7.C 8.B 9.B 10.D 6.Which word in the sentence is the direct object? Then we picked the ripe peaches from the sagging branches. A.peaches B.ripe C.branches D.sagging 7.Which word in the sentence is the direct object...
September 17, 2014

Direct objects please check ASAP
can you help with 4?
September 17, 2014

Direct objects please check ASAP
1.D 2.C and A 3.canoe 4.D 5.B and E 2.Which words in the sentence are the direct objects? The woman grows tomatoes and cucumbers in her garden. Choose all answers that are correct. A.tomatoes B.woman C.cucumbers D.garden E.grows 3.Which word in the sentence is the direct ...
September 17, 2014

(adverb phrases) (studyguide help please)
After his speech, the politician greeted his supporters. A.his supporters B.greeted his C.the politician D.After his speech
September 17, 2014

Help
all I have are 10 questions from a study guide would that work?
September 17, 2014

Help
Completely lost. Thanks
September 17, 2014

Help
Im trying to study but I need to know what (adverb phrases) are? 1.Please tell me what they are? 2.Please tell me how to identify them in a scentence? Please don't give me a link with a huge text of extra stuff...I just want to know how to identify them and what they are. ...
September 17, 2014

PLEASE CHECK ASAP
thanks...I will post another 5 ok Please delete this
September 16, 2014

PLEASE CHECK ASAP
Thanks for checking 1.D 2.C 3.B 4.C 5.C 1.According to "Michael Faraday's World," which intrigued Michael Faraday? A.automobiles B.airplanes C.photography D.batteries 2.How are the operating room in the Williams story and the atom-splitting lab in the Fermi story...
September 16, 2014

PLEASE CHECK ASAP!
Thanks for checking 1.D 2.C 3.B 4.C 5.C 1.According to "Michael Faraday's World," which intrigued Michael Faraday? A.automobiles B.airplanes C.photography D.batteries 2.How are the operating room in the Williams story and the atom-splitting lab in the Fermi story...
September 15, 2014

math check PLEASE
im stupid ok
September 11, 2014

math check PLEASE
which fraction si greater than -7/5? a.-5/9 b.-6/11 c.-1/2 d.-4/9 i think its A
September 11, 2014

I dont understand this
Which sentence has a misplaced adjective phrase? A. The dog chewed its bone with soft brown fur. B. The house on the left was finished six months ago. C. The cactus on the windowsill should be left alone. D. The clothes in the basket need to be washed
September 9, 2014

Chemistry 2
Pure nitrosyl bromide, NOBr at 0.762 M is placed into a sealed vessel and heated up to 400 K. When the system reaches equilibrium, it is found that 65.1% of the nitrosyl bromide has decomposed to nitrogen monoxide and bromine. Determine Kc for this reaction at 400 K: 2 NOBr(g...
September 8, 2014

math
reciprocal is simple, you just have to 1 divided by the number. In this case, reciprocal of 8 =1/8 In a more general view, reciprocal of x=1/x
September 6, 2014

Chemistry
Find the pH of 1.0E-8 M H2S04 (H2SO4 <==> 2H^+ + SO4^2-) I have got answer to be 7.70, can you confirm the answer for me please? If it is not good, i'll be very grateful if you could leave some guides.
September 6, 2014

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