Thursday

April 24, 2014

April 24, 2014

Total # Posts: 922

**Chemistry AP**

What is the mass of oxygen in a ml flask if the pressure is 1.00 atm and a temperature of 22.0 Celsius?

**math**

the needle of the scale in bulk food section of a supermarket is 25 cm long. find the distance when the needle rotates 50 degrees

**physics**

Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one speaker as the origin and g...

**physics help please**

Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one speaker as the origin and g...

**algebra**

Please help me write the polynomial by multiplying the factors together? (x+5)(x-4)^2

**physics help pleased**

Two trains on separate tracks move toward one another. Train 1 has a speed of 125 km/h and train 2 a speed of 100.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345 m/s.)

**physics**

A commuter train passes a passenger platform at a constant speed of 40.0 m/s. The train horn is sounded at its characteristic frequency of 320 Hz. What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding?

**algebra**

what is the percent of change from $48.50 to $38.80

**Math**

(5x + 10)(5x - 5)

**Math**

The area of a square field is represented by the trinomial x^2-10x+25. Write an expression that would represent the perimeter of the field.

**Math**

Find the area of a rectangle if its length is 5x+10 and its width is 5x-5

**Math**

(numeratorx^-4y^2/Denominator x^-2y^-4)-3

**Math**

lol omg I can't believe I missed that one!

**Math**

(abc)^0

**Math**

does the ^ mean squared? and there were No parentheses

**Math**

I had to simplify the expression: -5exponent2(squared) I got the answer of 25 wrong. Why is that wrong?

**engineering **

If a source is emitting particles at a rate of 15,000 particles per second, what is the flux at 30 cm away from the source?

**half life**

If the radiological half life of a material is 31 minutes, and you have 77 grams now, how much did you have 55 minutes ago?

**physics**

A 215 g mass is attached to a spring and executes simple harmonic motion with a period of 0.250 s. If the total energy of the system is 2.30 J. (a) Find the force constant of the spring. 135.81 N/m (b) Find the amplitude of the motion. i just need help with what equation i sho...

**physics**

A 0.44 kg object connected to a light spring with a spring constant of 22.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the mass. 28.28 cm/s (b) Determine the speed of the mass ...

**physics**

figured it out

**physics**

A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 105 g and rises to a maximum height of 75.0 cm, estimate the force constant of the spring.

**physics**

A frog in a hemispherical pod finds that he just floats without sinking in a fluid of density 1.30 g/cm3. If the pod has a radius of 3.00 cm and negligible mass, what is the mass of the frog?

**algebra 1**

a 100- foot cable is cut into two pieces.the first piece is 18 ft longer than the second. how long is each piece

**pre algebra**

$29/kg = how many cents/ g???? im really confused

**physics help please...**

A movable piston having a mass of 8.00 kg and a cross-sectional area of 5.00 cm2 traps 0.200 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas when its temperature is increased from 18°C to...

**physics**

A movable piston having a mass of 8.00 kg and a cross-sectional area of 5.00 cm2 traps 0.200 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas when its temperature is increased from 18°C to...

**physics help please...**

why is the difference in density 350? where does the 1000 come from?

**physics help please...**

A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the elongation, ÄL, of t...

**physics**

A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the elongation, ÄL, of t...

**fundamentals of taxation**

Determine the basis of stock in the hands of the shareholder in each of the following instances. Assume that the 80% rule is met in all cases. a. Contribution of property with a basis of $1,000 and a FMV of $1,400. b. Contribution of property with a basis of $3,000 and FMV of ...

**9th grade**

what is the average power developed by a motor lifting 400kg at constant speed through 10m at 8 secs?

**geometry**

find the value of the variable and LN if M is between L and N. LM=8a, MN=11a, LM=24

**5th grade math**

ted wrote a three-digit number. He divided it by 14, added 12, and multiplited by 20. His final anser was 600. what number did ted write? Plese show me how t get the answer. thanks.

**5th grade math**

Shawn had 42 hits in 140 at bats during the baseballe season. What is the decimal that represents his batting average, or hits per at bat? Please show me how to get the answer... Thanks

**5th grade math**

Shawn had 42 hits in 140 at bats during the baseballe season. What is the decimal that represents his batting average, or hits per at bat?

**Math**

Karen s 60 inches tall. Her sister Kate is 48 inches tall. What fraction compares Kate's height to Karen's height?

**Geometry**

1. Explain whether the following statement is a valid definition: “A 150° angle is an obtuse angle.” Use the converse, biconditional, and at least one Euler diagram to support your answer. 2. Explain the purposes of inductive and deductive reasoning in mathematic...

**Modern World Studies**

Yes, I've read my textbook many times. I just never found where it said what motivated Bismarck to enact reforms in Germany. This is the Second Industrial Revolution. I was hoping you could explain it.

**Modern World Studies**

1. As industry spread, the British and German governments initiated reforms to improve workers’ lives. What motivated Bismarck to enact reforms in Germany? What kinds of reforms were enacted in Germany and Britain? Please give me information that answers this question so ...

**science **

a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?

**science **

a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?

**Chemistry**

Thank you!

**Chemistry**

I am doing a report on ethylene glycol, AKA antifreeze, and I need to figure out if it is naturally occurring or if it is man-made. I can't seem to find this answer anywhere! Please help!

**Physics-Please help**

Thank you-I'll try it and get back with a possible answer maybe tomorrow

**Physics-Please help**

I have a question about the International Space Station-Its been orbiting earth at 350km-If the radius of the earth is 6,370 km, what is the period of orbit for the Space Station? Secondly, if it was moved to a geosynchronous orbit, what would the new altitude of the station b...

**Physics**

I have a question about the International Space Station-Its been orbiting earth at 350km-If the radius of the earth is 6,370 km, what is the period of orbit for the Space Station? Secondly, if it was moved to a geosynchronous orbit, what would the new altitude of the station b...

**English**

Thank you-I reposted a new post so please disregard it-thank you again

**English-Please check?**

After I posted the question I went back and reread the one part. Does he compare man and himself to ants and like pygmies we fight with cranes? Correct or not?

**English**

I'm reading Thoreau's "Where I lived and What I lived For-"Solitude and Conclusion." I don't understand how to answer this question. What does he compare man and his life to? Thank you

**math**

(5x5)+2-1 =

**math**

what is the next number after 2,22,12,132,1342

**Math**

The hiking club hiked to a park at 4mph. They got a ride back to town in a truck that went 20mph. If the round trip took 18 hours, how far was it from town to the park?

**Chemisty **

Nitric acid is abailable commercially at a concentration of 16M. What volume would you use to prepare 750 ml of a 0.20 M solution?

**english**

is it it is true that she is more clever or cleverer

**math**

explain why estimating before you divide helps you place the first digit in the quotient

**Math**

The value of the digit in the thousandths place is equal to the sum of the measure of the angles in a triangle (180 degrees) divided by 30

**english**

subject matter

**spanish**

for homework we have to unscramble these words: lcpoa, maidolrg, caluphin, masarac, patneon, pelpa padcoi can anyone help?

**5th grade social studies**

wwhat are some responsibilities of citizens

**question**

I am a 5th grader

**question**

it is not a question about homework, i just need to know if 5th graders can ask questions.

**question**

are 5th grade students allowed to ask questions??????

**english**

That is the answer put on the test, but the teacher marked it wrong. I am so frustrated! Thank you.

**english**

Please tell me if I should use to or too in the following sentence: Anthony knew all (to, too) well that he shouldn't have eaten a third piece of lasagna.

**introductory Algebra**

A small slot machine holds 500 coins consisting of nickels, dimes, and quarters. The number of quarters is twice the number of dimes. If the value of all the coins is $88.00, how many nickels, were in the slot machine?

**Chemistry**

What are the names of the following formulas:- [AL(CN)4]^(-1) [V(CO)4CII)^(+1) [MN(H20)3CL]^(3+) [FE(SCN)3F3]^(3-) What are formulas for the following names:- Bromotrihydroxomercurate (I)

**science physics**

Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?

**statistics**

A major taxi company is concerned that its proportion of late arrivals has substantially increased in the past month. Historical data shows that on the average 18% of the company taxis have arrived late. In a random sample of 1,240 taxis, 310 taxis have arrived late. If we are...

**statistics**

Based on a computed p-value of .01 and an alpha of .022, what is our decision in hypothesis testing?

**statistics**

Based on a random sample of 25 units of lawnmowers, the average weight is 102 lbs., and the sample standard deviation is 10 lbs. We would like to decide if there is enough evidence to establish that the average weight for the population of lawnmowers is greater than 100 lbs. A...

**statistics**

A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transaction time exceeds 50 seconds.

**statistics**

Given a test statistic of z= 1.50, the p-value for a right-tail (upper tail) test is approximately

**Pre-calc**

A cardboard box with an open top and a square bottom is to have a volume of 45 ft3 . Use a table utility to determine the dimensions of the box to the nearest 0.1 foot that will minimize the amount of cardboard used to construct the box.

**Algebra**

Thank you. Please tell me if this is correct. x=4 y=-5

**Algebra**

Can someone help me find the y and x intercept, or tell me how to do it please. f(x)=x^2-5x+4

**4th Grade Math**

64 times 15=64 times ten plus 64 times 5 or 640+320=960 divided by 56= 17.14285714286 you have to figure out the percentage part. maybe they mean 17 percent?

**1st grade**

Point value of a hexagon is six. trapezoid is 3. triangle is 1. Rhombus is 2. my homework says, shape, number and total. what do I do? thanks.

**child psychology**

D, because cognitive style begins in the brain, and has to do with how we understand something.

**public health**

I think the most recent world event is the oil spills. Global warming is another topic. Another big issue is pesticide use and antibiotic use in healthy animals.

**psychology**

I am sure that A is the correct answer! Perhaps eating foods rich in A can help, but without the reading and talking to them, it would not do anything at all!

**Math**

thanks again sue!

**Math**

A cookie sheet measures 13 x 9 inches. If each cookie has a diameter of 3 inches, how many cookies could fit on the sheet? You need to allow for 1/4 inch around each cookie.

**Math**

Simplify Completely: 1260/4410 How is this process accomplished? I spend 1 hour trying each number trying to factor the numerator and denominator squared or cubed and get too frustrated, resulting in no answer at all Thanks for your help!

**Math**

Gail ran the 100m dash in 10.74 seconds. How many Km per hour is this?

**college math**

8 fifty cent pieces, and 22 Quarters=$9.50 in change.

**Math**

Thank you ms Sue

**Math**

How many different rectangles can you draw that have a perimeter of 48cm? whole numbers only.

**math**

3.65x10^4 is it 36,400

**math**

a phone call cost $1.25 for the first minute $0.10 for each additional minutes.A 10 minutes phone call cost

**math**

mitch and jane met at the mall today. mitch goesto the mall every 3 day and jane goes to the mall every 5 days.how many times will they meet again in the next 3 weeks? is the answer 2 ????????

**math**

what two number complete 7 9 8 10 ___ ___ 10 12

**math**

If ann is 22 years old and terry is 10 years old, how many years ago was ann four times as old as terry

**math**

the number _________ is equal to 50,000+700+50+2

**math **

is 5^3 = 5x5x5

**MATH**

what is th scientific notation for the number 385,000 i think 3.85x10^5

**math**

while riding a bike at a rate of 14 mph, Steven takes 1.2 hours to ride the entire length of a trail. how many hours would it take him to complete the same ride if he rode at 8 mph? how do you do this problem?

**math**

Mitch and Jane met at the mall today. Mitch goes to the mall every 3 days and jane goes to the mall every 5 days. How many times will they meet again in the next 3 weeks? Is it 3 or 4 think it 3

**math**

Donna does 26 sits-ups on her fifth day of practice. If she has done 5 more each day than the day before. how many sit up did she do the first day. my answer was 6 but my mom dont agree

**Grammar**

How can i use the word cloy? i wrote this sentence but i'm not sure if i used the word correctly... "At first I thought you were appealing but now i realize that your just a cloy." I need help!! :D thanks in advance.

Pages: <<Prev | 1 | 2 | 3 | 4 | **5** | 6 | 7 | 8 | 9 | 10 | Next>>