# Posts by help

Total # Posts: 1,445

**Statistics**

Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine contains 2 or more defective parts, the machine is shut down for repairs. Find the probability that the machine will be shut down for repairs based on ...

*November 30, 2013*

**Statistics**

paired test hard

*November 21, 2013*

**math**

The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

*November 18, 2013*

**math**

The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

*November 18, 2013*

**math**

The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

*November 18, 2013*

**math**

The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

*November 18, 2013*

**Math**

No aneer

*November 12, 2013*

**Science - The Sun**

What is the true thickness of each of the sun's layers (core, radiation zone, convection zone, photosphere, chromosphere, and corona)? What is the age, composition, average density, period of rotation, distance from Earth, and source of energy from the sun?

*November 7, 2013*

**Math**

0.04m + F = 12

*November 7, 2013*

**physics**

How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?

*October 24, 2013*

**physics**

A pump lifts 200kg of water per hour a height of 6.0m . Part A What is the minimum necessary power output rating of the water pump in watts? Part B What is the minimum necessary power output rating of the water pump in horsepower?

*October 24, 2013*

**physics**

Two workhorses tow a barge along a straight canal. Each horse exerts a constant force of magnitude F, and the tow ropes make an angle θ with the direction of motion of the horses and the barge. (Figure 1) Each horse is traveling at a constant speed v. How much work W is ...

*October 24, 2013*

**physics**

You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some friction present; ...

*October 24, 2013*

**stats**

An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent. On the other hand, the firm reports that the yearly returns on tax-free municipal bonds ...

*October 3, 2013*

**health**

what are some mental or emotional problems i can research

*October 1, 2013*

**algebra**

9. 9/5w + 8/w ** Cannot be simplified. Am I correct?? 14. The number of instrctions N performed per second by a computer varies directly as the speed S of the computer's internal processor. A processor with a speed of 20 megahertz an perform 1,800,000 instructions per ...

*September 26, 2013*

**Quantum physics**

Leave it.. Its not good to discuss exam questions outside. I don't know how i reached here.. i just realized i don't need course certificate, if I'm not worth it. So, I will try to solve it myself. You do too.. :)

*September 8, 2013*

**Quantum physics**

6 then I will help with 5, 9 and 12

*September 8, 2013*

**Quantum physics**

Help for Q. No 6

*September 8, 2013*

**Algebra 1 parabola's**

I have a graph with a parabola on it and asked to write the function for f(x) in standard form. I know that standard is y=ax^2+bx+c obviously, since the points are on the graph we know x and y so a,b and c need to be found. The vertex is on (4,-4) the points on the left side ...

*September 5, 2013*

**Science/Biology**

Please help answer!

*September 3, 2013*

**hca 415**

I am just not understanding that question, I think I am just making it harder than it is asking.

*August 28, 2013*

**hca 415**

What major forces are most likely to fuel further movement toward major health care reform in the Unites States?

*August 28, 2013*

**hca 415**

U.S. Health Care System Critical Issues The size, scope, and complexity of the U.S. health system makes it difficult to deliver quality care to all of its citizens. What do you believe are the three most critical issues facing the health care system in the United States today...

*August 28, 2013*

**Statistic**

9 1 10 4 11 1 13 1

*August 24, 2013*

**science**

thanks argonaft plz do post others if you come up with the answers

*August 24, 2013*

**science**

Thanks to stat001,

*August 24, 2013*

**Business**

Discuss the quality of the disclosures for guartantees and commitments. could these disclosures be improved?

*August 23, 2013*

**Statistics**

Thanks, Walter DE

*August 17, 2013*

**math**

Solve each equation by factoring v(squared) - 10v + 21 = 0

*August 7, 2013*

**physics**

What is the final position of a mosquito that flies from an initial position of 20 cm in 20 seconds at -0.5 m/s?

*July 14, 2013*

**MIT 2.01X**

8.1 8.2 8.3 8.4 please

*July 3, 2013*

**Pre-cal**

find all solutions of equation in [0, 2pi) 2 (sec x)^2 + (tan x)^2 -3 = 0

*July 2, 2013*

**English**

how do Huck and Jim feel about the sanctuary of the raft and how do they feel about the violence and shame of the shore? I have to make a collage on this and I don't really know what to put. I was thinking of drawing a river and in the inside of the river would be a ...

*June 27, 2013*

**math**

How many ways can the integers 1,1,2,3,4,5,6 be arranged in a row, so that no integer is immediately adjacent to two strictly larger integers? NOTE: The sequence 3,1,2,4,5,6,1 is not valid as 1 is adjacent to 2 and 3, both of which are strictly larger than 1. The sequence 3,1,...

*June 27, 2013*

**Econ 112**

A researcher believes that the average size of farms in the U.S. has increased from the 2002 mean of 471 acres. She took a sample of 23 farms in 2011 to test her belief and found a sample mean of 498.8 acres and a sample standard deviation of 46.9 acres. At a 5% levelof ...

*June 18, 2013*

**physics**

In the movie Spiderman 2, there's a famous minute long scene where Spiderman stops a train. If the initial speed of a five car out of control subway train was around the top speed of the NYC subway (27 m/s), and Spiderman stopped the train in exactly one minute, then what ...

*June 2, 2013*

**Math**

Not sure how to ask my question? Need help on writing a formula for trapezoid A=h(B=+b) ____ 2 without parentheses and multiplication. Hope this makes sense. If it could be explained that would be great.

*May 25, 2013*

**algebra**

How long will the ball be in the air until it lands on the ground when h=-4.9t+28t+3.2 quadratics

*May 22, 2013*

**PhySics**

Using several bags filled with different amounts of the same item, take the mass of each and develop a procedure to determine the mass of a single item. (modelling milikan's oil drop experiment)

*May 19, 2013*

**physics**

I need help devloping a procedure: Using several bags filled with different amounts of the same item, take the mass of each and develop (and enact) a procedure to determine the mass of a single item....This procedure is supposed to model Milikans oil drop experiement.

*May 18, 2013*

**Statistics**

a)100 b)9.1287 c)0.851

*May 18, 2013*

**Statistics**

a) 0.3571 b).02193 c).0229

*May 18, 2013*

**statistics**

a)1, 1, 0, 0, 0, 0 1, 0, 0 b)1, 1, -1, -1, 0, 0 1, -1, 0 c)0 d)12.6490

*May 18, 2013*

**Physics**

Please help simonsay! Have problem with expresion too.

*May 14, 2013*

**Physics**

A singly charged positive ion has a mass of 5.2x10^-27 kg. After being accelerated from rest through a potential difference of 750V, the ion enters a magnetic field of 0.65T. Calculate the radius of the path of the ion in the field.

*May 11, 2013*

**Physics**

An electron in a television CRT moves toward the front of the tube with a speed of 7.5x10^6 m/s. A magnetic field of 0.04T (on a 50 degrees angle) causes the electrons to accelerate. Determine the acceleration

*May 11, 2013*

**physics**

A small 8.00g metal ball is suspended by a 14.0cm long string in a uniform electric field of 1200 N/C [right] (like in question #20). If the ball has a charge of 3.5x10^-5 C, what angle will the string make in the electric field?

*May 11, 2013*

**physical scinsce**

A cannon that is 10m long is designed to launch a 10kg ball over a castle wall. In order to do this the ball must have a speed of at least 50m/s as it exits the cannon. For every 10kg of explosives used, the force on the ball in the cannon increases by 1000N. How many kg of ...

*May 9, 2013*

**Physics**

Help please!

*May 8, 2013*

**physics**

Three charges lie along the x-axis. At x = 2.0m, a charge of 15x10^-6 C is fixed. At the origin, a charge of 30x10^-6 is fixed (like in question #8). Where can a third charge be placed between them so it feels no net force?

*May 6, 2013*

**physics**

Charged spheres A and B are in fixed positions (like in question #6) and have charges 3.6x10^-6 C and -5.4x10^-6 C respectively. Calculate the net force on sphere C, which has a charge of -9.9x10^-6 C.

*May 6, 2013*

**Maths**

A+B+B=35. B+B+c=25. A+B+B+B+c=55 What is the value of B?

*May 4, 2013*

**physic**

Help please!

*May 1, 2013*

**Physics**

A 76.3-kN car is travelling at 68.7 mph when the driver decides to exit the freeway by going up a ramp. After coasting 355 m along the exit ramp the car\'s speed is 30.1 mph, and it is h = 14.3 m above the freeway. What is the magnitude of the average drag force exerted on...

*April 29, 2013*

**coding**

what code are assigned for a patient admitted for chemotherapy for an azathioprione. I drug induced aplastic anemia? The patient has peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis Code(s) with the POA indicatior

*April 29, 2013*

**math**

jason and jenny went to see the movie Vampires From Mars. Jason told his mother, " The movie starts at 1:15 p.m. and is 2 hours and 56 minutes long, so it will end at 5:11 p.m. Please pick us up then." What was jasons mistake and how can it be fixed.

*April 28, 2013*

**Chemistry**

In the qualitative analysis scheme, what qualitative analysis principles are used to separate Cu2+ from Al3+? Check all that apply. -Selective precipitation -Fractional precipitation -Amphoteric precipitate solubilization -Competitive equilibrium solubilization: anoion ...

*April 24, 2013*

**physics**

The velocity of sound in the atmosphere is c=300 m/s. An airplane is traveling with velocity v=600 m/s at an altitude of h=8 km over an observer. How far horizontally past the observer in kilometers will the plane be when the ...

*April 21, 2013*

**physics**

A neutral solid conducting cylinder rotates about its axis with angular speed 1600 rad/s. In addition, there is an external magnetic field of induction B directed along the cylinder's axis. What must the magnitude of the magnetic field in Teslas so that no ...

*April 21, 2013*

**PHYSICS**

A small block of mass 0.5 kg is released from rest at the top of a ramp of mass 3 kg that sits on a frictionless horizonal surface. When the block leaves the ramp it has a speed of 4 m.s a)what is the recoil velocity of the ramp b) how high is the ramp?

*April 17, 2013*

**PHYSICS**

A golf ball (m=0.46g is struck by a club on a 50 deg. angle over 7ms. If the bll lands 200 m away, what is the force delivered to it by the club

*April 17, 2013*

**Chemistry**

Calculate the standard potential, E^o, for this reaction from its equilibrium constant at 298K. X(s)+Y^2+(aq)= X^2+(aq)+Y(s) K=8.68E6 E^o=??V

*April 17, 2013*

**Chemistry**

A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?

*April 16, 2013*

**Chemistry**

A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?

*April 16, 2013*

**HELP URGENT Phyiics**

What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent ...

*April 12, 2013*

**math**

please help

*April 8, 2013*

**math**

ted has 8 autographed baseballs. all together the baseballs are worth $200.00 explain why you do not have enough information to make a bar diagram to find the value of each baseball.

*April 8, 2013*

**Quantum Physics**

6C and 6D

*April 6, 2013*

**Quantum Physics**

prob 3 C

*April 6, 2013*

**MATH**

a baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filed out from the remaining members and a batting order will be set. How many possible betting orders can be made?

*April 5, 2013*

**physics**

A man of mass 78.5 kg walks down the aisle of an airplane at a speed of 1.40 m/s in the forward direction while the plane moves at a speed of 320 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic energy ...

*April 4, 2013*

**physics**

What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist, it would not be heard.)

*March 28, 2013*

**CHEMistry**

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using ...

*March 27, 2013*

**physics**

exp(2piji/M)beta j

*March 20, 2013*

**physics**

Got this result for above question: exp(2ðji/M)âj However it is graded as wrong, can someone help?

*March 20, 2013*

**Quantum Physics**

Meant thanks Helpman!

*March 20, 2013*

**Quantum Physics**

Thanks Anonymous and Gyanno! Anyone got Problem 3, 4 or 5?

*March 20, 2013*

**Quantum Physics**

Thank you! Did somebody figure out one or all of the QTF6 questions?

*March 20, 2013*

**Quantum Physics**

What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M. Got this result for above question but it is graded wrong, can someone help? e^i*pi/3

*March 20, 2013*

**Quantum Physics**

In Problems 1 to 5 we will work through example of QFTM for M = 6. Problem 1: What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M. Specify the probability amplitudes. You should use w to denote ƒÖ, but please fully simplify your ...

*March 20, 2013*

**Quantum Physics**

What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M.

*March 20, 2013*

**Quantum Physics**

Anyone for b, c, d?

*March 18, 2013*

**Physics**

A skier of mass 66 kg skis straight down a 11° slope at constant velocity. Draw a free-body diagram of the skier with the various external forces acting on her. Include the force of air resistance, which is directed opposite the velocity. (Do this on paper. Your ...

*March 16, 2013*

**Math**

A trainer for a professional football team keeps track of the amount of water players consume throughout practice. The trainer observes that the amount of water consumed is a liner function of the temperature on a given day. The trainer finds that when it is 90 degrees, the ...

*March 13, 2013*

**math**

A textbook store sold a combined total of 315 physics and chemistry textbooks in a week. The number of physics textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?

*March 7, 2013*

**math**

the problem is 0 < less then or equal to 2x-4<8 I got the answer which is 2< less then or equal to x <6 how do i write this on a graph

*March 7, 2013*

**algebra**

solve the compound inequality write the solution in interval notation 2u+4>-6 and 3u-6> -3 =

*March 7, 2013*

**DYNAMICS**

The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.

*March 5, 2013*

**DYNAMICS**

The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.

*March 5, 2013*

**Physics**

An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s

*March 5, 2013*

**help(reading)**

when a teacher tells you whats your novel, what does he or she mean?

*March 4, 2013*

**social studies**

just numbe 12 actualy

*February 28, 2013*

**social studies**

1. Which of the following helped to increase the populations of northeastern cities? (1 point) more diversity successful cotton crops growth of factories and trade building of the Erie Canal 2. A boundary was set between Canada and the United States as a result of (1 point) ...

*February 28, 2013*

**math**

what is mental math?

*February 21, 2013*

**DYNAMICS**

A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car? How do i get the displacement?

*February 17, 2013*

**DYNAMICS**

A particle travels along a straight line with a velocity v=(12-3t^2) m/s, when t is in seconds. When t=1s, the particle is located 10m to the left of the origin. Determine the accelaration when t=4s, the displacement from t=0 to t=10s, and the distance the particle travels ...

*February 17, 2013*

**DYNAMICS**

A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car?

*February 17, 2013*

**math**

Franco went to sticker station. He bought 2 strips of 10 and 6 singles of frog stickers. He also bought 5 strips of 10 and 2 singles of butterfly stickers. How many stickers did Franco buy?

*February 6, 2013*

**math**

Franco went to sticker station. He bought 2 strips of 10 and 6 singles of frog stickers. He also bought 5 strips of 10 and 2 singles of butterfly stickers. How many stickers did Franco buy?

*February 5, 2013*