Sunday

September 21, 2014

September 21, 2014

Total # Posts: 70,823

**math (help please)**

find all real numbers that satisfy the equation: sinx= -\sqrt3/ 2
*July 14, 2014*

**us history**

Quiz 1: 1. Outline the varying views of Reconstruction by Presidents Lincoln, Johnson and Grant, and among African Americans. How did Reconstruction evolve from 1865 to 1877? Lincoln outlined a plan to empower African Americans in reintegrate the Southern white into full ...
*July 14, 2014*

**Biology**

C. An artery moving blood from the heart to a muscle cell
*July 14, 2014*

**politicws**

When the President appoints a nominee to the Supreme Court, he mainly
*July 14, 2014*

**math**

The Jones family was one of the first to come to the U.S. They had 5 children. Assuming that the probability of a child being a girl is .5, find the probability that the Jones family had.
*July 14, 2014*

**statistics**

M&M’s The candy company claims that 10% of the M&M’s it produces are green. Suppose the candies are packed at random into small bags containing about 25 M&M’s per bag. A class of elementary students learning about percentages opens several bags, counts the ...
*July 14, 2014*

**physics**

A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
*July 14, 2014*

**physics**

A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
*July 14, 2014*

**Pre algebra**

Parenthesis Exponet Multipy 60 Divide Add Subtract
*July 14, 2014*

**Math**

There are 6 white, 9 brown, and 1 pink towels. What is the probability of using a brown or pink towel first.
*July 14, 2014*

**physics**

2.Boxcar A, with a mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg and is initially at rest. The boxcars collide inelastically and move together after they get stuck. What is their combined velocity?
*July 14, 2014*

**physics**

You walk to the corner store after school to buy a carton of milk before going home. The store is 750 m south of the school, and your house is 625 m north of the school. What distance have you travelled since leaving the school?
*July 14, 2014*

**Public Organization Management**

dsads
*July 14, 2014*

**Math**

Thank you
*July 14, 2014*

**Math**

About 190 million drivers are registered in the United States. While on a trip with her family, a student counted the number of male drivers and female drivers on the road. There were 58 male drivers and 48 female drivers. Using the sample predict the number of female drivers ...
*July 14, 2014*

**CHEMISTRY**

IT'S PLANE SIMPLE! (10/10 points) Calculate the planar packing density (fractional area occupied by atoms) on the (110) plane of nickel at 300K. 0.5549 - correct \[0.5549\] Calculate the linear packing density (atoms/cm) for the [100] direction in nickel at 300K. 2.837*10^...
*July 14, 2014*

**chem **

When one mole of C6H6 is burned, 5.69 MJ of heat is produced. When the heat from burning 9.69 g of C6H6 is added to 5.69 kg of water at 21.0°C, what is the final temperature of the water?
*July 13, 2014*

**chem**

At constant volume, the heat of combustion of a particular compound is –3209.0 kJ/mol. When 1.829 g of this compound (molar mass = 159.29 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 6.753 °C. What is the...
*July 13, 2014*

**probability**

Suppose the probability of surviving for 5 years after being diagnosed with a particular cancer is 0.60; and the probability of surviving 10 years is 0.20. If a person survives 5 years, what is the probability that she will survive 10 years.
*July 13, 2014*

**Math**

How do you subtract time? 5:44am-14hrs=? Are there multiples way of figuring this out?
*July 13, 2014*

**Grammar**

which is the correct word order? She only said.. or She said only Any rules for word order?
*July 13, 2014*

**Chem **

If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 42.75 g/mol, how many grams of this compound must you burn to release 191.90 kJ of heat?
*July 13, 2014*

**social psychology**

people direct their attention to those aspects of what they see that stand out rather than blend. this is called ?
*July 12, 2014*

**statistics**

the heights of the "basketball fans" at a highly anticipated basketball game.
*July 12, 2014*

**Hunting training **

20. Which Best of Breed winner may not compete for Best in Field in lure coursing events? A. Greyhound B. Italian Greyhound C. Whippet D. Basenji I picked B
*July 12, 2014*

**Hunting training **

19. Which of the following is a reason for dismissing a dog from a lure coursing event? A. Interfering with the run of another dog B. Refusing to return to the handler C. Starting before the tally-ho is sounded by the huntmaster D. Failing to run I picked A
*July 12, 2014*

**Hunting training **

12. Which of the following statements is false? A. In a hunting test, a dog competes against a standard of perfection rather than against other dogs. B. A hunting test is a non-competitive event. C. Hunting tests are available for pointing breeds, retrievers, spaniels, and ...
*July 12, 2014*

**hunting training**

Answers c
*July 12, 2014*

**hunting training **

7. Which of the following is not a characteristic of a good field trial or hunting test dog? A. Finding birds or other game B. Good scenting ability C. Running at the sound of a shot D. Retrieving downed birds from land or water picked A
*July 12, 2014*

**hunting training **

3. AKC Retriever field trial Derby stakes are open to which of the following dogs? A. Retrievers older than two years of age B. Retrievers younger than two years of age C. Retrievers that go directly to birds D. Retrievers that know how to do a blind retrieve picked B
*July 12, 2014*

**hunting training **

2. Which of the following statements is true? A. Field trials are noncompetitive events. B. Field trials are open only to retrievers and pointers. C. Field trials are open only to dogs that have a conformation championship. D. Field trials are competitive events in which dogs ...
*July 12, 2014*

**Accounting**

I have completed all of my assignment except this one last question. I am having a heck of a time figuring out where to even start. Can anyone help me? The comparative year-end balance sheets of Sign Graphics, Inc., revealed the following activity in the company's current ...
*July 12, 2014*

**Accounting**

I have completed all of my assignment except this one last question. I am having a heck of a time figuring out where to even start. Can anyone help me? The comparative year-end balance sheets of Sign Graphics, Inc., revealed the following activity in the company's current ...
*July 12, 2014*

**Math**

I know that I posted this already but my question has not been answered.. Solve in the exact form. Original problem: (sqrt of 4x+1)+(sqrt of x+1)=2 4x+1 + 2√(4x^2+13x+3) + x+3 = 4 Where does the 2 come from according to the equation above?? This 2:-----> 2√(4x^2...
*July 12, 2014*

**finance**

Based on the following information, what amount would be SUBTRACTED from the BANK BALANCE side of a checking account reconciliation? Service charge $12, Outstanding checks $145, Interest $3.50, Deposit in transit $80
*July 11, 2014*

**Ethics and moral reasoning**

Hill would claim that a lack of aestheic perception
*July 11, 2014*

**biology**

nvM i got the answer!
*July 11, 2014*

**biology**

You have discovered a new species of yeast and you would like to determine the pathway that this organism uses to synthesize the amino acid tryptophan. This yeast species can take up tryptophan, or synthesize it on its own if tryptophan is not present in the environment. ...
*July 11, 2014*

**Social Studies**

what was the location of George Washington's home? I think it is Mount Vernon, but from research I see he also lives at Pope's Creek where he was born, and Ferry Farm on the Rappahannock River where he spent much of his youth.
*July 11, 2014*

**Social Studies**

what did Lincoln mean when he stated, "If we falter and lose our freedoms, it will be because we destroyed ourselves." I think he meant that when our government policies start doing more damage than all of America's enemies have done, we as a nation are allowing ...
*July 11, 2014*

**electric circuit**

I suspect that Steve has the diagram right. Then each of the six branches can carry 1.5 amps so 9 amps total 9*12 = 108 Watts
*July 11, 2014*

**science**

Mufaddal wants to travel from point H to point F as shown in image. How many ways can he travel from point H to point F if moving north and west directions are not permitted? 12 7 10 4
*July 11, 2014*

**chemistry**

We can build the model in a spreadsheet simulating ten layers in the filter. For each layer we calculate the headloss with Carmen-Kozeny and calculate from this the pressures as a function of the place in the filter. Calculate the headloss and the actual pressure in each layer...
*July 11, 2014*

**science**

Mufaddal wants to travel from point H to point F as shown in image. How many ways can he travel from point H to point F if moving north and west directions are not permitted? 12 7 10 4
*July 11, 2014*

**area**

Alice’s backyard is a rectangular piece of property that is twice as long as it is wide. The total area of her yard is 1,000 m2. What is the approximate width of her backyard?
*July 10, 2014*

**PHI 208 Week 4 Reading Quiz**

Hill would agree most with which of the following statements?
*July 10, 2014*

**business**

one way for a country to obtain an absolute advantage in marketing a product outside it's boarders is to
*July 10, 2014*

**math**

Indicate the equation of the line through (2, -4) and having slope of 3/5
*July 10, 2014*

**math**

Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4, 1) and (2, -5).
*July 10, 2014*

**trig**

evaluate the expression under the given conditions tan 2 theta; cos theta=7/25, theta in quadrant I
*July 9, 2014*

**Urgent Calculus Help 2**

Thank you!
*July 9, 2014*

**Urgent Calculus Help 2**

Find the equation of the tangent line to the graph of f(x) = 6x ln(x + 4) at x = 2.
*July 9, 2014*

**Urgent Calculus Help**

Thank you Damon! :)
*July 9, 2014*

**Urgent Calculus Help**

Let H(x)=F(G(x)) and J(x)=F(x)/G(x). Suppose F(7)=4, F′(7)=−8 G(7)=3, G′(7)=−5 G(2)=7, G′(2)=−2 then H′(2)= J′(7)=
*July 9, 2014*

**precalculus**

A Ferris wheel is 10 meters in diameter and boarded from a platform that is 3 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 4 minutes. How many minutes of the ride are ...
*July 9, 2014*

**Physics**

Vy = sqrt(Uy^2 - 2gh); Uy = U sin(theta) Vx = Ux = U cos(theta) So |V| = sqrt(Vy^2 + Vx^2) = sqrt(Uy^2 - 2gh + Ux^2) = sqrt(U^2 - 2gh) = sqrt(40^2 - 2*9.8*10) = 37.46998799 = 37.47 ANS B. Note that U^2 = Uy^2 + Ux^2.
*July 9, 2014*

**Physics**

A baseball is thrown with a speed of 40m/s at an angle of 30 degrees. Neglecting friction what is the speed of the ball in m/s when it reaches a height of 10 meters?
*July 9, 2014*

**Physics**

PE=mgh 5*9.8*15= 735 Power= Energy/time so.. t=E/P t=735/500 t=1.47
*July 9, 2014*

**Physics**

A motor outputs power of 500 watts and is used to raise a 5kg mass vertically at constant speed. How long in seconds does it take to raise the mass 15 meters?
*July 9, 2014*

**Physics**

For a 0.1-kg frog to jump to a height of 80cm requires how much energy in joules? A) 0.566 Joule. B) 0.784 Joule. C) 0.584 Joule. D) 0.287 Joule. Not sure what I am missing... PE=mgh (0.1)(9.8)(80)= 78.4
*July 9, 2014*

**Chemistry**

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep from it freezing at -15 °F?
*July 9, 2014*

**physics**

A person whose mass is m = 100.0 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 32.7° with the horizontal. What is the reading on the scale?
*July 9, 2014*

**Physics**

Car A travels with speed v around curve number one, which has a radius r. Car B travels with speed 2v around curve number two, which has a radius 2r. What is the ratio of the two accelerations A/B? A) 2 B) 4 C) 1/2 D) 1/4 E) 1
*July 8, 2014*

**Physics**

W=Fd Lifting: Ramp: w=(1500)(1) w= (800)(2) w= 1500 w= 1600 1500<1600; more work using ramp Answer: a
*July 8, 2014*

**Physics**

W=Fd Lifting: w=(1500)(1) w= 1500
*July 8, 2014*

**Physics**

15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. Comparing the work involved in lifting the...
*July 8, 2014*

**Physics**

V=Vo+at v=15.5+3(3.6) v=15.5+10.8 v=26.3 m/s
*July 8, 2014*

**Physics**

A car traveling with an initial velocity of 15.5 m/s accelerates at a constant rate of 3.0 m/s2 for a time of 3.6 seconds. (a) What is its velocity at the end of this time? A) 26.3 m/s B) 18.5 m/s C) 10.8 m/s D) 22.1 m/s E) 19.1 m/s
*July 8, 2014*

**Physics**

you need to solve for time first: d=Vot + 1/2at^2 use g for acceleration 4.9=0+1/2(9.8)t^2 4.9= 4.9 t^2 t^2= 4.9/4.9 t^2=1 t= sqrt(1)=1 Now that you have t you can solve for d: d=vt d=(680m/s)(1) d=680m
*July 8, 2014*

**Physics**

A bullet is fired horizontally from a height of 4.9 m with a velocity of 680 m/s. How far away does the bullet land? A) 680 m B) 340 m C) 1360 m D) 170 m E) 800 m
*July 8, 2014*

**Physics**

centripetal acceleration= v^2/r=s^2/r car A: s^2/r 1/1=1 car B: s^2/r 2s^2/2r 4s/2r =2 Car A/B= 1/2
*July 8, 2014*

**Physics**

Car A travels with speed v around curve number one, which has a radius r. Car B travels with speed 2v around curve number two, which has a radius 2r. What is the ratio of the two accelerations A/B? A) 2 B) 4 C) 1/2 D) 1/4 E) 1
*July 8, 2014*

**Physics**

lifting force so add acceleration 9.8+2 2m/s= 11.8 11.8*50kg= 590N
*July 8, 2014*

**Physics**

Your mass is 50 kg. Suppose you are standing on a scale in an elevator which starts moving up and increases its speed at the rate of 2 m/s every second. What would be the reading on the scale? A) 590 N B) 490 N C) 390 N D) 100 N E) 0
*July 8, 2014*

**Physics**

A ball is thrown as a projectile with a horizontal velocity of 30 m/s and a vertical velocity of 30 m/s. At the highest point which of the following is true? A) The velocity is zero B) The acceleration is 0 C) The acceleration is 9.8 m/s2 D) The acceleration is -9.8 m/s2 E) ...
*July 8, 2014*

**Quest**

How do you write 9th july 2014 in 5 letters without using numbers ?
*July 8, 2014*

**Physics**

v^2=vo^2+2ad 30^2=10^2+2(-9.8)(d) 900=100+(-19.6)d 800=-19.6d d=40.8
*July 8, 2014*

**Physics**

A stone is thrown upward from a bridge at a speed of 10 m/s. It narrowly misses the bridge on the way back down, and hits the water at 30m/s. what is the approximate height of the bridge?
*July 8, 2014*

**Physics**

A girl on a sled with a total mass of 90kg starts from an elevation of 100meters. At the bottom of the run her speed is 30m/s. How much energy in joules was lost due to friction?
*July 8, 2014*

**Physics**

Due to a strong wind from the west of 65 km/h, a plane ends up traveling 330 km/h [W 15 S] relative to the ground. What was the magnitude of the velocity of the plane relative to the air in km/h?
*July 8, 2014*

**physics**

a man weighing around 260 pounds falling 5.5 feet vertically would have generated a force of how many pounds?
*July 8, 2014*

**Physics**

Jeffrey wants to swim his girlfriend who is straight across from him, on the other side of a river bank. The river has a current velocity of 4km/h [W]. The width of the river is 300m. If it takes Jeffrey 15 minutes to reach her, a) how fast should the boy swim to cross the ...
*July 8, 2014*

**math**

What number sets does square root 3 belong to?
*July 8, 2014*

**mechanism physics **

if a 10kg block with a velocity of 10m/s collide with a stationary block of 5kg , after collission the two blocks move stick together.calculate the velocity after collision for a 10 kg block?
*July 8, 2014*

**Physics-help please!**

A net torque of 54 N.m is applied to a disk with a rotational inertia of 13.2 kg.m2 What is the rotational acceleration of the disk?
*July 8, 2014*

**calculus**

f(t) = − 4 t2 − t− 6 Find the equation of the line tangent to the graph of f(t) at t = 8. Enter the equation of the tangent line here (in terms of the variable t):
*July 7, 2014*

**calculus**

If C′(62) = 120 and R′(62) = 145, approximately how much profit is earned by item number 63?
*July 7, 2014*

**Math/Statistics**

A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance.
*July 7, 2014*

**cc**

You are offered two different sales jobs. The first company offers a straight commission of 9% of the sales. The second company offers a salary of $ 260 per week plus 4% of the sales. How much would you have to sell in a week in order for the straight commission offer to be at...
*July 7, 2014*

**Managerial Economics**

HoneyBee Farms, a medium-size producer of honey, operates in a market that fits the competitive market definition relatively well. However, honey farmers are assisted by support prices above the price that would prevail in the absence of controls. The owner of HoneyBee Farms, ...
*July 7, 2014*

**math**

17. Jenny, Greg, & Hank gather their marbles and have 20 in total. If Jenny has 3 less than twice the number Greg has, and Hank has 1 less than Greg has, how many marbles do each of them have?
*July 7, 2014*

**Physics**

(31)(10.8)/17N= 19.69411765 cm = 0.1969411764m
*July 7, 2014*

**Physics**

A weight of 31 N is located a distance of 10.8 cm from the fulcrum of a simple balance beam. At what distance from the fulcrum should a weight of 17 N be placed on the opposite side in order to balance the system?
*July 7, 2014*

**Physics**

a.)N= r*F (32N)(.27m)= 8.64 N.m b.) half of .27=0.135 t= F*d (32N)(0.135)= 4.32 N.m
*July 7, 2014*

**Physics**

A force of 32 N is applied at the end of a wrench handle that is 27 cm long. The force is applied in a direction perpendicular to the handle as in the diagram. (a) What is the torque applied to the nut by the wrench? (b) What would the torque be if the force were applied half ...
*July 7, 2014*

**Physics**

a.) (1.4)(4.7)=6.58 rev/s b.) half of 6.58 is the average rev/s as it is constant acceleration so (3.29)(4.7)=15.463 revolutions
*July 7, 2014*

**Physics**

A bicycle wheel is accelerating at the constant rate of 1.4 rev/s2 (a) If it starts from rest, what is the rotational velocity after 4.7s? (b) Through how many revolutions does it turn in this time?
*July 7, 2014*

**Physics**

a= change in w divided by change in t (Wfinal- Winitial)/ time (2.1-1)/5.8 =0.189655172 rad/s ^2
*July 7, 2014*

**Physics**

The rotational velocity of a merry-go-round increases at a constant rate from 1 rad/s to 2.1 rad/s in a time of 5.8 s. What is the rotational acceleration of the merry-go-round?
*July 7, 2014*

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