Tuesday

September 16, 2014

September 16, 2014

Total # Posts: 165

**chemistry**

2. A researcher is often required to prepare solutions in the lab. Typically, a lab provides a concentrated solution. This solution must be diluted to the proper concentration. Hydrochloric acid is a common stock solution that is typically purchased at 37.0% HCl concentration...
*September 10, 2014*

**Physic**

A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, he decides to perform a simple experiment at the indoor firing range. The soldier hangs a target a distance of d = 113 m from the end of the barrel. The rifle is...
*September 10, 2014*

**Geography**

What is domant volcano?
*July 24, 2014*

**Math Helppp**

Scores for men on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of 112. (a) If 1 man is randomly selected, find the probability that his score is at least 579. (b) If 13 men are randomly selected, find the probability...
*June 2, 2014*

**trig**

a carousel has eight evely spaced seats shaped like animals. During each ride, the carousel makes between 8 and 9 clockwise revolutions. At the end of one ride, the carousel stops so that the lion is in the position where the zebra was when the ride started. through how many ...
*May 7, 2014*

**CHHS**

A a ferris wheel has a diameter of 100ft. The passengers ride in cars that make 5 revolutions in 7.5 minutes. Approximately how far does a car on the Ferris wheel travel in 1 minute
*May 7, 2014*

**pjysics**

A capacitor that has 10 cm diameter plates, 0.1mm apart, is charged at 100 V and the battery removed afterwards. What are the charges on each of the platesimmediately after charging the capacitor? What is the voltage if the distance between plates is increased to 0.5 mm? How ...
*April 22, 2014*

**MATH**

Guess what the next number in this sequence is: 16, 5, 14, 7, 21, 9, ____
*February 6, 2014*

**math**

y=3x-8^x 3-8^x*ln(8)
*October 15, 2013*

**art**

Rhythm
*October 15, 2013*

**Physics**

My bad. I don´t know the other one Half loop N= (k*d^2/m-2*g*R)*(m/R)
*October 15, 2013*

**Physics**

only number 5 wich is (5/2)*R
*October 15, 2013*

**Physics**

Consider an ideal spring that has an unstretched length l0 = 3.3 m. Assume the spring has a constant k = 23 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.6 m from...
*October 15, 2013*

**math**

How could the height of a tall pine tree be estimated without climbing it and measuring it?
*October 11, 2013*

**that**

Georgia purchased a house in 1998 for $220,000. In 2003 she sold the house and made a net profit of $50,000. Find the effective annual rate of return on her investment over the 5-yr period. Please round the answer to the nearest tenth of percent.
*October 3, 2013*

**Physics**

Bob rides his bicycle on a bike path that is 75 kilometers long to get to his house that is due east of the bike path. If it takes Bob 15 hours then what is his velocity?
*September 21, 2013*

**Science**

What resources should a scientist use to research water pollution?
*August 28, 2013*

**math**

Im having trouble with number lines. Can you tell me if .45 is equal to 4/10
*April 29, 2013*

**Math**

What figure has an infinite number of lines of symmetry?
*April 22, 2013*

**CHEMISTRY**

after starting with 0.343g Al and excess HCl the volume of H2 gas collected over water was 472ml. the atmospheric pressure was 754 mmHg and the temp was 21c. 1 balanced chemical equation? 2calculate the pressure in atm of dry hydrogen gas in a mixture
*April 18, 2013*

**math**

How do you write out 121.2 million
*April 8, 2013*

**Math**

150 ml Thanks so much
*April 1, 2013*

**Math**

There are about 5 ml in one teaspoon. There are 3 teaspoons in one tablespoon. How many ml are there in 10 tablespoon?
*April 1, 2013*

**Statistics Math**

The annual per capita consumption of fresh apples (in pounds) in a nearby state can be approximated by a normal distribution, with a mean of 15.4 pounds and a standard deviation of 3.8 pounds. (a) What is the smallest annual per capita consumption of apples that can be in the ...
*April 1, 2013*

**physics**

238J
*March 29, 2013*

**Math**

Find the number of each kind of object in the collection Curt has 12 models in all. Three of the models are airplanes. Curt has 5 more models of cars than boats. How many models of cars does Curt have?
*March 1, 2013*

**The Diary of Anne Frank**

B?? She wants her father to understand she is trying to be a better person.
*February 14, 2013*

**Math**

Explain It Adam made 19 paper cranes Monday and 8 more Tuesday. He gave 9 friends an equal number of cranes. How many cranes did each friend received? Explain how you found your answer.
*February 10, 2013*

**math**

2ounces
*December 13, 2012*

**math**

If a pastry chef has 13 lbs of apple slices to make 8 apple pies if slices are distributed equally what will be the wright of the apple slices used to make eavh pie
*December 13, 2012*

**Math**

A curve has equation y= 2 + x - x^2. Find coordinates of 3 unknown points on the line. 1st point is at negative x, y value. 2nd point is at x=0 and y is positive. 3rd value is at y=o and x is positive.
*December 9, 2012*

**Physics**

I dont know the answer
*October 16, 2012*

**physics**

A uniform rod 8m long weighing 5kg is supported horizontally by 2 vertical parallel strings at P and Q and at distances of 2m and 6m from one end. Weights of 1kg, 1.5 kg, and 2kg are attatched at distances of 1m, 5m, and 7m respectively from the same end. Find the tension in ...
*October 16, 2012*

**physics**

A uniform rod 8m long weighing 5kg is supported horizontally by 2 vertical parallel strings at P and Q and at distances 2m and 6m from one end. Weights of 1kg, 1.5kg ,and 2kg are attatched at distances of 1m, 5m, and 7m respectively from the same end. Find the tension in each ...
*October 16, 2012*

**math**

how do you answer this qestion 3 plus 11multiplyed(70-175)divided by 7
*September 19, 2012*

**finance**

don't know the answer
*September 8, 2012*

**Calculus 1 **

Find constants a and b in the equation f(x)= ax^b/(ln(x)) such that f(1/3)= 1 and the function has a local minimum at x= 1/3
*June 2, 2012*

**Math**

There are six different toppings for pizzas, sausage, hamburger, pepperoni, ham bacon and pork. There are three different cheeses, american, mpzzarella, parmeasan. the pizza comes with two different meats and one chese , how many different combinations of pizzas are possible?
*May 17, 2012*

**Chemistry**

What minimum amount of 1.55 M \rm HCl is necessary to produce 26.5 L of \rm H_2 at STP?
*May 16, 2012*

**finance**

You take out a 30- yr mortgage loan, purchase price is $120,000 put $20,000 down and finances the balance of $100,000 at fixed annual loan rate of 12%, what will be your monthly payment? How much total interest will you have paid at the end of 30 years?
*May 4, 2012*

**Math Help PLEASE!**

Find the equation of the hyperbola whose vertices are at (-1,-5) and (-1,1) with a focus at (-1,-7). Please and thank you.
*April 21, 2012*

**java **

Write a program that will find the lowest common denominator of two numbers. The user will enter the two denominators, the program will output both the lowest common denominator and the multipliers required for each fraction. For example, if the user is trying to add 1/3 and 1...
*April 15, 2012*

**geometry**

QUADRILATERAL ABCD IS A RECTRANGLE IF AC=2X+13 AND DB=4X-1 FIND DB
*March 23, 2012*

**Math**

What are the next two numbers in this pattern? 72 86 75 89 80 ___ _____
*March 15, 2012*

**Math**

Wow Thank you So much
*March 8, 2012*

**Math**

88 44 64 32 52 ___ ____ Can someone help me figure out the pattern?
*March 8, 2012*

**Math**

Each fire hose is 25 yards long. What is the minimum number of hose for a 230 ft distance? (I think I have to convert 230 ft into yards which is 76.666 yards. So I think I need a miminum of 4 hoses. ) Am I correct?
*March 1, 2012*

**CHEM**

Why are gamma rays generally not shown when writing nuclear equations ?
*February 22, 2012*

**mathj**

Baker Company purchases a new delivery truck for $20,000. The truck is expected to have a useful life of 90,000 miles before replacement, and a salvage value of $2,000. In its first year the truck was driven 22,000 miles, and a further 19,000 miles in year two. What is the ...
*February 8, 2012*

**business math**

Dennison Property Company purchases a new office space for lease to small businesses for $2,400,000, including a land value of $400,000. The property is placed in service on March 15, 1999. Using MACRS, what is the depreciation on this property at the end of its first year? (...
*February 8, 2012*

**math**

I think 200 L but I'm not sure
*February 8, 2012*

**math**

What is the capacity of a bathtub 200 L or 34,000 mL?
*February 8, 2012*

**math**

THANK U!
*February 7, 2012*

**math**

128 FEET 4 INCHES
*February 7, 2012*

**math**

DAN WAS WALKING FROM ONE END OF THE MALL TO THE OTHER END. HE TOOK THE FOLLOWING MEASUREMENTS OF FIVE STOREFRONTS: 23 FEET 11 INCHES, 25 FEET 2 INCHES, 18 FEET 3 INCHES, 28 FEET 8 INCHES, AND 32 FEET 4 INCHES.IF DAN ADDED ALL THE MEASUREMENTS, WHAT WOULD BE THE TOTAL DISTANCE.
*February 7, 2012*

**math**

Julie is going to the mall. She has 15 coins in her pocket that nadd up to $2.18. She has the same number of pennies as she does dimes. she has 5 more quarters than she has nickels. If she has 3 pennies, how many quarters, dimes and nickles does Julie have?
*February 7, 2012*

**prpblem solving**

A customer enters a store & purchases slippers for $5, paying for the purchase with $20 bill. The merchant, unable to make change, ask the grocer next door to change the bill. The merchant then gives the customer the slippers & $15 change. After the customer, leaves the grocer...
*January 19, 2012*

**math**

Am i suppose to multiply 5 x 9 and add 1 I come up with 46/5. Am I suppose to subtract 3/5 from that answer?
*January 19, 2012*

**math**

How do you subtract 3/5 from 9 1/5 I am having trouble understanding the work can u help
*January 19, 2012*

**physics**

If a rock being swung on a rope experiences a centripetal acceleration of 40 m/s2 while traveling at 8 m/s, what is the length of the rope
*January 19, 2012*

**Math**

Would you rather have $10,000 or a stack of pennies 10 miles high? After you make your choice, figure out the value of the stack of pennies.
*January 17, 2012*

**english realism and regionalism**

When we are introduced to Peyton Farquhar, he is in the last few minutes of his life as he waits for the support to be kicked out from under his feet so that the hanging can take place. The foreshadowing occurs when Farquhar imagines freeing himself from he rope, falling into ...
*January 16, 2012*

**chemistry**

Water can be decomposed to hydrogen and oxygen. How many grams of water must decompose to yield 24.0L og gases at 1.00atm and 25 degrees C? I used n=PV/RT to find 0.981 moles of gases. I then took the ratio of O2 to H2 to find the moles of oxygen compared to hydrogen. 0.327 ...
*December 8, 2011*

**chemistry**

A 10.0L flask contains 3.0atm of ethane and 8.0 atm of oxygen at 28 degrees C. The contents of the gas are reacted and allowed to return to 28 degrees C. What is the pressure of the flask? Using n=RT/PV I converted atm to moles and then used the balanced equation to find that ...
*December 8, 2011*

**psychology**

Time Remaining: 1. If the concept is truck, the prototype might be: (Points: 5) a Ford pick up. bulldozer. gravel eighteen wheeler. personnel carrier. 2. If the prototype is block or ball, the concept is: (Points: 5) construction. toy. child. play. 3. All major cities have a ...
*November 2, 2011*

**psychology**

The experimental rats were being raised in separate environments. One group lived in the traditional cage in a quiet, but well lighted room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land." There were colorful toys, ...
*November 2, 2011*

**psychology**

One of the arguments against inherited racial differences in intelligence is based on data that shows: (Points: 5) a college education reduces the gap between the IQ scores of white and black races. nutrition reduces the gap. scores for black test takers improve as they mature...
*November 2, 2011*

**psychology**

In their book The Bell Curve, Murray and Herrnstein supported their claim of intelligence differences between races as attributable to
*November 2, 2011*

**psychology**

Nisa has grown up in a small village in the foothills. There was no electricity and water had to be hand pumped. They seldom saw people from the "outside." When she entered school the bus had to pick her up at 6:30 am in order for her to arrive at school by 8:30 am. ...
*November 2, 2011*

**psychology**

Nisa has grown up in a small village in the foothills. There was no electricity and water had to be hand pumped. They seldom saw people from the "outside." When she entered school the bus had to pick her up at 6:30 am in order for her to arrive at school by 8:30 am. ...
*November 2, 2011*

**psychology**

The testing company has hired qualified people in the field to administer the new test bank to subjects of different ages and ethnic backgrounds. They need a sizable number of scores from inner city, urban, and country/small town subjects. Their goal is to gather sufficient ...
*November 2, 2011*

**psychology**

. One attribute that the Stanford-Binet, WAIS-III, and WISC-IV have in common is that they are all: (Points: 5) timed. written. administered individually. group tests.
*November 2, 2011*

**psychology**

. One attribute that the Stanford-Binet, WAIS-III, and WISC-IV have in common is that they are all: (Points: 5) timed. written. administered individually. group tests.
*November 2, 2011*

**simplify**

78-1.40-2.47
*October 27, 2011*

**math**

mr jacob is 55 years old and tony is 7 years old. in how many years will mr. jacob be 4 times as old as tony?
*October 26, 2011*

**ap world history**

3.Differentiate between the Paleolithic and Neolithic eras. 4. Describe the agricultural transition. 5. Give examples that illustrate the difference between independent origin and cultural diffusion. IM STUCK ON THESE I DID ALL THE REST!!! HELP ASAP????!
*October 24, 2011*

**statistics**

There are 44 mathematics major and 163 computer science majors at the college. How many ways are there to pick 2 representatives, so that one is a mathematics major and the other is a computer science major?
*October 19, 2011*

**science**

Have a crossword puzzle An element found in nature. second letter a last letter l seven letters total
*September 13, 2011*

**physics**

A 2.00 kg blob of Gak, moving at 4.0 m/s, strikes a motionless figure skater in the back and sticks. The skater, with the Gak on her back, glides off at 0.160 m/s. Calculate the skater’s mass.
*May 18, 2011*

**chemistry2**

Please help I think the moles are already given so molality=mol of solute/kgofsolven so i think 12.0/ I am stuck also
*May 11, 2011*

**Math**

An indoor track is shaped like a rectangle with a semi-circle on each end. The distance around the track is 200 yards. Find the maximum area enclosed by the track.
*April 26, 2011*

**Algebra**

The town of Appleville recorded the following dates and populations. YEAR POPULATION (in thousands) 1980 51.5 1985 53 1990 56 1995 62 Estimate the approximate population of Appleville in 1988 by finding an equation and then substituting.
*April 22, 2011*

**high school chem 1 (stoichemestry)**

using equation: 2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O question: How many Molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?
*March 2, 2011*

**chem 1 high school**

equation: 4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O(g) What mass of O2 is needed to produce 0.563g of NO? I think the answer is 750g but how do I get that answer?
*March 2, 2011*

**12th grade chemistry**

How many molecules of water can be made from 9.21 x 10^22 molecules of hydrogen sulfate? The equation is 2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O
*March 2, 2011*

**high school chem 1**

thanks Dr. Bob
*March 1, 2011*

**Math**

The answer is B because all factors in 5^3 x 7^2 x 19^2 are prime. For example, 5,7,19, 3 and 2 cannot be decomposed. An example of decomposed is 9 where it can be divided by a number other than 1 and the number itself.
*February 26, 2011*

**types of business writing**

what is the answer to penn foster exam 02800601
*February 9, 2011*

**English**

can you check my grammar and content? i need to submit this paper for an exam and want to get a good grade.
*February 8, 2011*

**Algebra**

(x^-2y^2z)^-3/(x^-4y^2z)^-2
*February 4, 2011*

**math**

(x^-2y^2z)^-3/(x^-4y^2z)^-2
*February 4, 2011*

**math**

I had this same exact problem Change "OF" to "Multiply". 4/9 OF 3/16= 4/9 x 3/16= 1/12
*January 3, 2011*

**physics**

hmm i somehow got .3161 but thats wrong according to my online instructor.hmm
*December 21, 2010*

**physics**

does stand for gravity?
*December 21, 2010*

**physics**

i posted this question before however i did not understand drwls explanation. anybody else want to try ? Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?
*December 21, 2010*

**physics**

umm i need help...which equation would i use to solve the probnlem and how do i go about finding the answer? Here it is: Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?
*December 20, 2010*

**chemistry**

55 g/mol x 1 mol/22.4 L x 0.011L = __ g
*December 12, 2010*

**chem. **

I really don't understanf how jameschadwick discovered the neutron. iread websites and read the 18 pg. article but what was his experiment?
*December 12, 2010*

**physics**

The answer is .45 T F = B(I)L B = F/(I)L B = .90/4(.5) B = .45 T (T is Teslas)
*December 1, 2010*

**physics**

A 0.50 kg ball that is tied to the end of a 1.1 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical (a) Determine the ball's speed. (b) If, instead, the ball is revolved so that its speed is 4.0 m/s, what angle does the ...
*November 22, 2010*