Tuesday

May 26, 2015

May 26, 2015

Total # Posts: 1,751

**Math**

convert the repeating decimal to a/b where a,b are integers and b #0.
*November 14, 2014*

**Stats**

A random sample obtained from a population has a mean of µ=100 and a standard deviation of ó = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n...
*November 11, 2014*

**chem**

what is the percent yield of the reaction between 5.2 mL of 0.1233 M barium nitrate and 4.9 mL of 0.1256 sodium sulfate if 0.140 grams of the precipitate are produced? Formula?... BaNO3(aq) + Na2SO4(aq) --> Na2NO3(aq) + BaSO4(s)
*November 11, 2014*

**Chem 130**

What mas of liquid mercury should be produced by the reaction between 5.0 mL of 0.1102 M mercury(II)nitrate ans 0.621 grams of silver metal? would the formula be... Hg(NO3)2(aq) + 2Ag(aq)--> 2AgNO3(aq) + Hg(l)
*November 11, 2014*

**Physics**

A small ball with a mass of 30.0 g is loaded into a spring gun, compressing the spring by 13.0 cm. When the trigger is pressed, the ball emerges horizontally from the barrel at a height of 2.30 m above the floor. It then strikes the floor, after traveling a horizontal distance...
*November 11, 2014*

**math**

James wishes to make a deposit. He has these bills: 16 ones, 5 fives, 5 tens, and 3 twenties. He has 4 nickels, 20 dimes, and 16 quarters. James has checks for $66 and $53.75. James wants to receive $50 in cash. What should he enter on the TOTAL line? $
*November 7, 2014*

**Chem 130**

How many tons of zinc can be obtained from 976 tons of zinc ore that is 78.0% zinc carbonate?
*November 4, 2014*

**Chem 130**

What is the percentage of water in copper (II) sulfate pentahydrate?
*November 4, 2014*

**English**

D is the best choice
*November 4, 2014*

**English**

Which of the following is the best version of a thesis statement about charter schools? a. A charter school is a tax supported established by a charter between a school board and outside group of teachers or parents. b.A charter school operates without local and state ...
*November 4, 2014*

**English**

All of the following are true special predicates except. A. A compound predicate is one that is passive. B. A predicate can have direct or indirect object. C.When a predicate is passive ,the subject is being acted upon rather an acting. D. A predicate may consist of two or ...
*November 4, 2014*

**English**

d. all of the above
*November 4, 2014*

**English**

A prepositional phrases include A. A preposition as about or above. B.an object of the preposition that is a noun or pronoun. C. any modifiers of the object of the preposition. d. I am think A
*November 4, 2014*

**English**

It not b
*November 4, 2014*

**English**

Compound predicates, predicates with direct objects and predicates with indirect objects,passive predicates.
*November 4, 2014*

**English**

All of the following are true special predicates except. A. A compound predicate is one that is passive. B. A predicate can have direct or indirect object. C.When a predicate is passive ,the subject is being acted upon rather an acting. D. A predicate may consist of two or ...
*November 4, 2014*

**chem**

How many grams of the adipic acid (C6H10O4) could form from the reaction of 15.00 g of cyclohexane (C6H12) with the 25.00 g of oxygen? Will the formula be... 2O2 + C6H12 ---> C6H10O4
*November 4, 2014*

**Chem 130**

How many grams of the adipic acid (C6H10O4) could form from the reaction of 15.00 g of cyclohexane (C6H12) with the 25.00 g of oxygen? Will the formula be... 2O2 + C6H12 ---> C6H10O4
*November 3, 2014*

**math**

f(x)= x^3 - 2x^2 - 21x - 18 all possible rational zeros # of possible positive zeros # of possible negative zeros find all the real zeros
*October 30, 2014*

**Chem 130**

How many grams of Aluminum oxide will be produced when 2.44 grams of Aluminum burns in air (i.e. react with Oxygen)?
*October 29, 2014*

**Chem 130**

wrong formula, would it be... MgCl2 ---> Mg + HCl
*October 29, 2014*

**Chem 130**

HNO3 + Al2O3 ---> Al(NO3)3 + H3O?
*October 29, 2014*

**Chem 130**

I want to make sure I have the correct double replacement formula. would it be
*October 29, 2014*

**Chem 130**

How many grams of magnesium chloride should be produced by the single displacement reaction between 0.578 grams of magnesium metal and an excess hydrochloric acid?
*October 29, 2014*

**Literature**

"Write a monologue revealing the unspoken thoughts and feelings of one of the characters in "Everything Stuck to Him." Use the personal pronoun "I." Choose one of the following scenes to step into the character's mind: a) the girl sitting up alone ...
*October 29, 2014*

**Physics**

A cargo plane is flying horizontally at an altitude of 11.2 km with a constant speed of 1260 km/hr when a large crate slides out of the rear of the plane. How long does it take the crate to hit the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of s, please.
*October 27, 2014*

**Chemistry**

What does n equal in the dH equations? number of moles?
*October 26, 2014*

**Chemistry**

A 10.0 gram sample of a mixture of CH4 and C2H4 reacts with oxygen at 25°C and 1 atm to product carbon dioxide gas and liquid water. If the reaction produces 520 kJ of heat, what is the mass percentage of CH4 in the mixture? PLEASE HELP! I do not know where to even start!
*October 26, 2014*

**Chemistry**

In a titration for the determination of the chloride ion, a solution of 0.1M agno3 is used against a solution, the volume of which is 100ml. At the completion of the titration, the residual concentrations of silver and chloride ions are equal and the total volume is now 125ml...
*October 22, 2014*

**Chemistry**

In a titration for the determination of the chloride ion, a solution of 0.1M agno3 is used against a solution, the volume of which is 100ml. At the completion of the titration, the residual concentrations of silver and chloride ions are equal and the total volume is now 125ml...
*October 22, 2014*

**Physics: mechanics **

A 250g bullet with a speed of 500m/s passes through the center of a 1.5kg square wooden block [ side length 18cm] at rest upon a horizontal frictionless surface. As it exits the block, the bullet has a speed of 150m/s. A) find the initial speed of the center of mass of the ...
*October 20, 2014*

**math**

segment A'B is the image of segment A'B after a translation up by 6 units
*October 16, 2014*

**English (Macbeth)**

Act 3 What information is the audience given about the following characters: Malcolm Macduff Edward the Confessor Siward i really need help i think the answer for macduff is that he is trying to convince malcolm to help him overthrow Macbeth
*October 13, 2014*

**Physics graphing**

Im making a graph of magnetic force vs current, after investigating the magnetic force exerted on a current-carrying wire, and how it varies with current, length, magnetic field and angle. How do I know when to use the point (0,0) on the graph?
*October 13, 2014*

**Biology**

What is the location and effect of waves of contraction in the digestive system.
*October 11, 2014*

**ENGLISH CLASS**

Motivation is poor. complete sentence fragment run-on
*October 9, 2014*

**Biology**

Which heart beat measurement is most indicative of your general health? i think it is your resting heart beat, but im not sure the reason
*October 5, 2014*

**English**

My interpretation is that the moose resembles Christ due to the pain the moose has gone through, similarly to what Christ went through, such as the crown of thorns, and with the moose a girl puts a purple cap on him.
*October 5, 2014*

**alagbra**

5-4(12-3y)=
*September 23, 2014*

**statistics**

A sample of 100 patients who use the drug are followed over time. Those that use the drug have a mean life expectancy of 71.30 years. The mean life expectancy for the general population is 75.62 years. The population standard deviation is 28.
*September 20, 2014*

**statistics**

the wieights of newborn babies are distributed normally, with the mean of approximately 115 oz and a standard deviation of 20 oz. if a newborn baby is selected at random. what is the probability that the baby weighs more than 95 oz?
*September 18, 2014*

**statistics**

the weights of newborn babies are distributed normally, with the mean of approximately 115 oz and a standard deviation of 20 oz. if a newborn baby is selected at random. what is the probability that the baby weighs more than 95 oz?
*September 18, 2014*

**Chemistry**

Consider 2H2 + O2 ¨ H2O. To produce 0.895 g water, how many grams of O2 are required?
*September 15, 2014*

**computer science**

The problem is to calculate the usable area in square feet of a house. Assume that the house has a maximum of four rooms, and that each room is rectangular. I need help writing a program description,analysis,test,and with pseuocode with it.
*September 12, 2014*

**Math**

An all girl college began enrolling boys in 2005. By 2012 the ratio of boys to girls was 3 to 7. If there are 200 more girls than boys how many boys are there?
*September 6, 2014*

**Homework **

Q=wc(T1-T2) find c Can you help me find out how to do this problem PLEASE !! TY
*September 3, 2014*

**math**

to determine the number of trout in a lake, a conservationist catches 111 trout,tags them throws them back into the lake.later 28 throw are caught. 14 of them are tagged. how many trout would be conservationist expect to be in the lake?'
*August 26, 2014*

**Introduction to Psychology**

I am working on a written final project and confused on how to apply psychological theories, processes, and concepts to human behavior. When it a person is believed to be suffering from major depression and then I am to Discuss psychological disorders and treatment approaches ...
*August 16, 2014*

**life science**

Gls bxs kep the fossls safe and permit people to look at al sides
*July 31, 2014*

**stats**

what is the probability that a 6 digit phone number contains at least one 8?
*July 19, 2014*

**Physics**

(a) Calculate the linear acceleration of a car, the 0.280 m radius tires of which have an angular acceleration of 15.0 rad/s2. Assume no slippage. (m/s2) (b) How many revolutions do the tires make in 2.50 s if they start from rest? (rev) (c) What is their final angular ...
*June 29, 2014*

**Physics**

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1500 kg and was approaching at 9.00 m/s due south. The second car has a mass of 700 kg and was approaching at 15.0 m/s due west. (a) Calculate the final velocity of the cars. (b) ...
*June 26, 2014*

**Statistics**

I'm taking stats online which is making it even more difficult for me and I have nowhere to begin when answering this question. 1. A pharmaceutical industry claimed that their new product will lower the cholesterol level by an average of 14.5. To verify the claim, a ...
*June 22, 2014*

**Physics**

The rocket sled shown in Figure 4.5 accelerates at a rate of 29.0 m/s2. Its passenger has a mass of 66.0 kg. Calculate the direction and magnitude of the total force the seat exerts against his body.
*June 14, 2014*

**Physics**

Howdy Jason, this is Michelle! Unfortunately I tried that, as well as just adding the forces together. Neither are the correct answer. Thanks for trying to help tho :).
*June 14, 2014*

**Physics**

Two teams of nine members each engage in a tug of war. The first team's members have average masses of 67 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 72 kg and exert average forces of 1361 N horizontally. (a) ...
*June 14, 2014*

**Algebra**

Suppose a cost-benefit model is given by y=2771x/100-x, where y is the cost for removing x percent of a given pollutant. What percent of pollutant can be removed for $36,000? Round your answer to the nearest tenth of a percent?
*June 9, 2014*

**Chem 130**

How does the energy of a principal energy level depend on the value of n? Does a higher value of n mean a higher or lower energy?
*May 13, 2014*

**Chem 130**

How do I do this? Using the symbol of the previous noble gas to indicate the core electrons, write the electron configuration for each of the following elements. (a) zirconium, Z = 40 (b) vanadium, Z = 23
*May 13, 2014*

**Calculus**

Let R be the region enclosed by the graphs y=e^x, y=x^3, and the y axis. A.) find R B.) find the volume of the solid with base on region R and cross section perpendicular to the x axis. The cross sections are triangles with height equal to 3 times the length of their base.
*May 13, 2014*

**Chem 130**

What mass of CO2 could be absorbed by 1.37 g of CaO? What volume would this CO2 occupy at STP?
*May 6, 2014*

**Chem 130**

*Thanks!
*May 5, 2014*

**Chem 130**

Thank!
*May 5, 2014*

**Chem 130**

DrBob222, I still don't understand
*May 5, 2014*

**Chem 130**

Suppose two 100.0 L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to produce a pressure of 155 atm in its respective tank at 22°C?
*May 5, 2014*

**Chem 130**

A sample of oxygen gas is collected by displacement of water at 25°C and 1.11 atm total pressure. If the vapor pressure of water is 23.756 mm Hg at 25°C, what is the partial pressure of the oxygen gas in the sample?
*May 5, 2014*

**Chem 130**

If 2.03 g of helium gas occupies a volume of 12.0 L at 22°C, what volume will 6.19 g of helium gas occupy under the same conditions?
*May 5, 2014*

**physics **

one can determine a persons center of mass by having them recline on a plank resting on two scales. A person 2m tall lies on such a plank and the scale near her head reads 405 N and the one near her feet reads 360 N. Find the center of her mass.
*May 2, 2014*

**Physics**

A pirate captain has asked you to help him engineer a new plank to have prisoners walk overboard from. He needs the plan to fall overboard with the prisoners in order not to leave any evidence behind. He has a uniform beam of length 8m and a mass of 100kg is resting on two ...
*May 2, 2014*

**physics**

You lay a board over two wooden pegs. The board has a length of 5m and weighs 25 N. it overhangs the left peg by 1m and the right by 2m. Determine the normal force that each peg exerts on the board.
*May 2, 2014*

**physics **

You are a sucker for scenic overlooks, so you want to build a house overhanging a cliff. The way you do this is by taking a 20,000 N concrete beam and hang it over the edge of the cliff with one edge at the cliff ledge and the other edge 700m away in free space. You plan to ...
*May 2, 2014*

**physics**

A ladder of mass 20kg and length 5m can be held up against a wall because the wall exerts a normal force against it. The grass has a coefficient of a static friction of 0.35. find the normal force of the wall against the ladder.
*May 2, 2014*

**physics**

A turntable with a radius of 12cm is being explored by two bugs, one at 5cm from the center and another, very dizzy beetle at 2cm from the center. The turntable is spinning at 7 rad/s. Which bug will have the greater angular momentum?
*May 2, 2014*

**physics**

You always carry 3 wristwatches. One of them is synchronized with your labs atomic clock. Another is running low on battery and is 3 minutes behind, while the third watch is running 6 minutes fast. All were set to the same time when purchased. List the comparative angular ...
*May 2, 2014*

**Physics**

A figure skater spinning in a circle and dazzling the Olympic judges brings her arms together for a final flourish. 1. Does her angular momentum increase, decrease, or stay the same after she pulls her arm in? 2. Does her angular velocity increase, decrease, or stay the same ...
*May 2, 2014*

**Physics **

A rolling barrel with initial velocity 20 m/s encounters a hill 10m tall to slow it down 1. state where its angular speed is 0 2. state where its rotational kinetic energy will be 0 3. state where its translation kinetic energy will be 0 4. for each of the two flat surfaces ...
*May 2, 2014*

**Physics**

You have a crane boom with a mass of 10000kg being held up by a cable and holding a weight of 2500kg. A. Find the torque caused by the weight B. Find the torque caused by the cable C. Find the torque caused by any other force holding it in equilibrium
*May 2, 2014*

**Physics **

You wonder what would happen if you fired a 9.109e-31kg particle moving at 20 m/s in the x direction of a 1.672e-24kg particle moving at 12 m/s at 110 degrees from the x direction. The lighter particle hits the screen at a 100 degree angle from the x direction. What is the ...
*May 2, 2014*

**Physics**

You shoot your enemy's reflection in the mirror while playing paintball. The y axis is perpendicular to the mirror. The mirror has a mass of 1kg and the paintball has a mass of 0.05 kg. The paintball hits the mirror at a speed of 8 m/s at an angle of 25 degrees from the ...
*May 2, 2014*

**Physics **

Instead of standing in the back of the lane and rolling the ball toward the pins like most people, you place a 5kg bowling ball at rest at the back of the lane and try to hit it toward the pins with a perfectly elastic collision using a 1kg ball rolling at 5 m/s from a 25 ...
*May 2, 2014*

**Physics**

A 25,000kg bowling ball moving at 40 m/s on a path angled at 17 degrees hits a 10000kg bowling ball moving at 25 m/s on a path angled at 60 degrees causing the lighter ball to be deflected of to an 65 degree angle. Assuming this is a two dimensional, perfectly elastic ...
*May 2, 2014*

**Calculus**

Consider the differential equation dy/dx=xy-y. Find d^2y/dx^2 in terms of x and y. Describe the region in the xy plane in which all solutions curves to the differential equation are concave down.
*May 1, 2014*

**Physics **

You have a crane boom with a mass of 10000kg being held up by a cable and holding a weight of 2500kg. 1. Find the torque caused by the weight 2. Find the torque caused by the cable 3. Find the torque caused by any other force holding it in equilibrium
*April 30, 2014*

**Physics**

Your teenage kid finally gets his drivers license. He takes off in your brand new car that weighs 2000kg at 47m/s when he hits a parked semi that weighs 40000kg. They plow forward in a perfectly in elastic fashion in the same direction. What is the velocity of the wreck?
*April 26, 2014*

**Physics**

Your teenage kid finally gets his drivers license. He takes off in your brand new car that weighs 2000kg at 47m/s when he hits a parked semi that weighs 40000kg. They plow forward in a perfectly in elastic fashion in the same direction. What is the velocity of the wreck?
*April 25, 2014*

**Physics **

In one dimension, a 12 kg ball moving to the right at 9 m/s collides with a 4kg ball moving to the left at 3 m/s. The collision is perfectly elastic. Find the final velocities of both balls.
*April 25, 2014*

**Physics**

A 25000kg bowling ball moving at 40 m/s hits a 10000kg bowling ball moving at 25 m/s from behind. It is a perfectly elastic collision, so what are the final velocities of the two balls?
*April 25, 2014*

**Physics **

In one dimension, a 5g ball is moving to the right at 7 m/s collides with an 8g ball moving to the left at 4 m/s for a perfectly elastic collision. What is the final velocity of both balls? I just don't understand the whole left and right thing. I have already worked it ...
*April 25, 2014*

**College Physics**

Can someone check my answers for two and help me with the third? 1) A mass m at the end of a spring of spring constant k is undergoing simple harmonic oscillations with amplitude A. Part (a) At what positive value of displacement x in terms of A is the potential energy 1/9 of ...
*April 25, 2014*

**math**

An item originally cost $16.95 and is on sale or 22%. Find the cost of the item. Explain each step
*April 23, 2014*

**chemistry**

A sample of helium at 20 °C occupies a volume of 3.63 L at a pressure of 3.07 atm. What volume does this helium sample occupy if the pressure is reduced to 2.43 atm while maintaining the temperature at 20 °C?
*April 23, 2014*

**Algebra**

finding the equation to the perpendicular lines. y=x+4; (-7,1)
*April 18, 2014*

**Calc**

Last question! Thanks! Given f(3)=4 and f'(3)=5 find g'(3) where g(x)= 5x/f(x)
*April 17, 2014*

**Calculus**

Given f(3)=4 and f'(3)=5, find g'(3), where g(x)=8x.f(x)
*April 17, 2014*

**physics**

a window easher pushes his brush up a vertical window at constant velocity by applying a force F as shown below. The brush weighs 12 N and the coefficient of the kinetic friction is 0.2. find the magnitude of force F.
*April 17, 2014*

**physics**

Two blocks are connected by a light string that passes over a massless, frictionless pulley as shown. The coefficient of friction between the 4kg block and the surface is 0.4. Find the acceleration of the system and the tension in the string.
*April 17, 2014*

**English**

This is the part I am having trouble with: This led Schultz to leave the shells in random places around her home. She would put them where she was sure to see them and every so often, she picked one up and squeeze it, “grateful for the reminder to live a pinch-me life.&#...
*April 16, 2014*

**English**

My Essay: A Mother’s Sense of Wonder To lose a loved one is very hard to bear, but to lose a parent can be very heart-wrenching for a child at any age. Connie Schultz wrote “My Mom’s Wonderful, ‘Pinch Me’ Life,” which was published in 2012, in the...
*April 16, 2014*

**College Math**

Thank you very much!
*April 16, 2014*

**College Math**

Find the derivative of the following functions: a) f(x)=(3x^2-6 )/(x+2) b) g(x)=sin(e^2 +5x) c) j(x)=6xe^x d) Your velocity is v(t)= t^2 = 1 for 0≤ t ≤ 4. Find or estimate the distance traveled during this time.
*April 16, 2014*