Friday
August 22, 2014

Number of results: 100,999

Physics
Here's the question again that I am trying to get help with because I can't figure it out and I got one answer, but I really couldn't understand it. Help please! A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins...
May 16, 2012 by Ann

chemistry
a radioactive material is undergoin nuclear decay. After 40 minutes, 25% of the sample remains. What is the half life of the sample? Pls say the formula how to calculate it a)10 mins b) 20 mins c) 40 mins d)80 mins e) 160 mins
May 28, 2012 by star

physics
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.47 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What is the magnitude of the couple’s displacement...
September 6, 2012 by colby

physics
A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.
May 15, 2012 by Ann

Two identical guitar strings are stretched with the same tension between supports that are not the same distance apart. The fundamental frequency of the higher-pitched string is 400Hz, and the speed of transverse waves in both wires is 200 m/s. How much longer is the lower-...
December 12, 2012 by Kathy

stats
Time taken in mins for student to walk to school. 1-5 mins (4 students) 6-10 mins (7 students) 11-15 mins (10 students) 16-20 mins (20 students) 21-25 mins (6 students) 26-30 mins (3 students) 1)Estimate the probability that a student selected at random will take at least 21 ...
September 26, 2008 by Keisha

Physics
Jason drives due west with a speed of 35.0 mi/hr for 30 mins, then continues in the same direction with a speed of 60.0 mi/hr for 2.00 hr then drives farther west at 25.0 mi/hr for 10.0 mins. What is his average velocity?
September 12, 2010 by Dakota S

Physics
One afternoon, a couple walks five-sixths of the way around a circular lake, the radius of which is 1.45 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What are the magnitude and direction (relative to ...
September 6, 2011 by Krystal

Phyics
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 2.16 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What is the magnitude of the couple’s displacement...
September 23, 2013 by I NEED HELP PLZ!!! Thanks!!!

Math
A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins., 5 mins., 9 mins., 12 mins. The diameter of the wheel is 328 ft. and the height, with the base, is 369 ft.
May 14, 2012 by Ann

Earth Science
My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day. This is the raw data...
April 25, 2011 by George

math
Mandy runs 4km in 18min. She plans to run in a 15km race. How long will it take her to complete the race? distance = rate x time distance - 15 km time = solve for this rate = 4km/18min 4km/18 mins = 1km/4.5 mins so 15 kms x 4.5 mins = 67.5 mins = 1 hr 7 mins 30 secs hope that ...
November 20, 2006 by cymantha

Math
Lawrence records the number of minutes he reads each day show below Day 1: 75 mins Day 2: 30 mins Day 3: 25 mins Day 4: 50 mins Day 5: 80 mins How many minutes must Lawrence read on the sixth dat of have mean of 55 minutes read for the 6 day?
April 18, 2011 by Dani

math
Chase spends 20 mins reading,30mins practicing Piano 15mins cleaning and 40 mins doing his Homework chase is busy for 105 mins what fraction of the time does he spend cleaning??
October 9, 2012 by Anonymous

Science
George walks 3 km on Monday and 4 km of Tuesday and 2.5 km on Thursday. On Monday, he walks 25 mins., Tuesday 40 mins., and Thursday 30 mins. What is his average speed? d= t= help please
February 27, 2013 by Megan

Math
Having trouble knowing where to start with this one: A maker of tools claims the average amount of time it takes to assemble a table saw is 50 mins with a standard deviation of 40 mins. What is the probability that the sample mean will be less than 44 mins if a random sample ...
March 23, 2010 by Len

Physics
Your airplane leaves 20 degrees north (linear velocity = 845 nm/h), heading to a point due north at 25 degrees north (linear velocity = 815 nm/h). You set the autopilot for due north and go to sleep. If your flight time is 30 mins, how far off in what direction are you if you ...
March 16, 2010 by Krysten

Math
George walks 3 km on Monday and 4 km of Tuesday and 2.5 km on Thursday . On Monday, he walked 25 mins., Tuesday 40 mins., and Thursday 30 mins. What is his average speed? t= D=
February 27, 2013 by James

Math
You can write the equation y=x+4 in different ways. Which of these is correct ? x+y=4 x=4+y y-x=4 y+4=x x=y-4 There could be a couple of ways ... Please help I do not have a clue on this. I will be very greatful if you could help in the next 30 mins xxxx why don't you pick ...
April 18, 2007 by Emma

Sra j mcguin
I will be able to make the changes in about 30 mins my free can you check ur again it is due at 11 today thanks so much
October 7, 2009 by Sam

physics
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.03 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What is the magnitude of the coupleâ€™s ...
August 29, 2012 by Anonymous

math
a ship travels 20miles on a course S 40 degree 10 mins W and then 25miles on a course of N 28 degree 20 mins W . Find the distance and direction of the last position from the frist
September 27, 2013 by lyka

Chem.
If you had a mixture of benzene, toluene, and m-xylene, what would be the expected order of retention times? Explain. I know benzene would have a retention time of 3 mins, toluene about 4.8 mins, and m-xylene about 5.6 mins, right? Therefore, the expected order of retention ...
November 3, 2009 by Chelsea

Stoichiometry Test
THIS TEST IS DUE IN 15 MINS AND I JUST NEED HELP ON HOW TO DO IT LIKE THE STEPS FOR THEM ??
February 12, 2009 by Cool Dom

physics
Suppose a cylindrical habitat in space 7.70 km in diameter and 25.0 km long has been proposed. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center. They would all be held in place by rotation of the cylinder about its long ...
March 11, 2011 by Rachel

biology
I have to do a line graph showing generation time every 20 mins a cell diving upto 360 mins. using binary fission . am getting mixed up how to mark it down on two axis.9 boxes with mini boxes of 10 in axis i was going to use for time and vertical axis has 14 large boxes within...
January 29, 2012 by sharon

Computers
The Romance World Cruise Line provides special gifts for passengers who are newlyweds, as well as for those who have been married more than 40 years. Design a pseudocode for a program that accepts a couple's last name, ship cabin number, and number of years married. Display a ...
September 3, 2012 by Liz

A couple has just learned that their daughter has hemophilia. They already have a son who does not have the disease. What are the genotypes of the couple? I don't know how to do this please help!
March 5, 2014 by Elina

Calculus
As part of a fitness program, Annie walks for 35 mins on day 1, and increases the walking time by 8 mins each day. She completes the fitness program on the day she first spends more than 3 hours walking. The program is completed on what day? This is how I did it. 3 hours would...
September 21, 2011 by Anonymous

Math
The eggplant ave. bus passes max's house every 8 mins. the cabb creek bus passes it every 12 mins. the last they passed by together was at 9:00 am. when will it happen again
February 21, 2013 by George

To Derr
You have made a couple of uncalled for comments to a couple of questions. Your remarks are not only not necessary but they take away our time in reading them to know they are nonsense. This board tries to help students. You are helping; please desist with the spurious comments...
May 12, 2008 by DrBob222

physics
One afternoon, a couple walks five-eighths of the way around a circular lake, the radius of which is 1.45 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel?
September 7, 2011 by kj

statistics
Health Club Schedule The time per workout an athlete uses a stairclimberis normally distributed with a mean of 20 mins and a standard deviation of 5 min. An athlete is randomly selected. Find the probability that the athlete uses a stairclimber between 20 and 28 mins.
February 11, 2011 by Jessica

Time
How to convert mins into hrs like convert 7hrs 30 mins to hrs?
May 10, 2010 by Anonymous

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
March 16, 2011 by Sonia

Good evening ~ I have 2 questions. Kelsey was assigned math homework. He was given 8 word problems to solve. He estimated that it would take him 5 mins. to solve each problem (THAT WOULD TAKE 40 MINS. FOR KELSEY TO COMPLETE HIS MATH HOMEWORK) ? HOW TO WRITE A MULTIPLICATION ...
December 4, 2008 by Ross

Math
U burn 30 calories walking for 10 mins and at this rate how many calories will u burn in 15 mins
April 16, 2014 by Shohanur

St monica
Bill and Amy want to ride their bikes from their neighbourhood to school which is 14.4 kilmeters away. It takes Amy 40 mins to arrive at school. Bill arrives 20 mins after Amy. How much faster (in meters/second) is Amy's average speed for the entire trip?
July 5, 2011 by Lydia

Math
Rae runds a mile 20 times. Her average time is 5.2 mins. She wants to drop her slowest time 5.8 mins and find the ew average. Write and equation to find are her new average running time
November 15, 2010 by Abby

Physics 12 Review
End of the semester, working on the final review... I have a couple of questions I am stuck on right now. My notes on these questions seem to have vanished into the void... 1. "A 2.0kg puck travelling due east at 2.5m/s collides with a 1.0kg puck travelling due south at 3.0m/...
January 23, 2009 by solexgirl12

Physics
PLEASE ANSWER ASAP!!!!!!!!!!!!!!!!!!!!!!! a cross country runner runs 3km due east, 5km due south and 8km south west. what is the runners final displacement and what direction in true bearing form? PLEASE CAN YOU EXPLAIN IT STEP BY STEP
July 15, 2012 by Tap

english
1. You will be taller than her in a couple of years. (What is the part of speech of 'than' here? Is 'in a couple of years' 'two years' or 'two, three, or four years'?) English - Ms. Sue, Wednesday, June 2, 2010 at 5:50pm "Than" is used as a conjunction. A couple of years ...
June 2, 2010 by rfvv

physics
Find the vector sum of a 65 m/s wind acting due east and a 32 m/s wind due west. Give the magnitude and direction please.
September 15, 2011 by Nathaniel yeh

Astronomy
Hi, I asked about converting light minutes to light years and was told just do it normally like minutes to years So i have 7 light minutes... 7 mins x (1 hr/60 mins) x (1 day/12 hr) x (1yr/365days) like that?
April 5, 2010 by Anonymous

Hi - I have about 15 mins to finish htis will you be on while i try to make the changes
October 9, 2009 by sam

Chemistry
For solution 1, 4.00mL of 0.0200 M Cr(NO)3 was added to 20.00ml of 0.0200 M Na2H2EDTA, then the a time and absorbance were taken every 5 mins. If at 5:00 min the absorbance was 0.039 how do I find [Cr3+]0, [CrEDTA-]t, and [Cr3+]t. The absorbance at 0:00 mins was 0.039 if it is...
September 17, 2012 by Fred

Physics
for this question the answer is 680..the answer i get is 684 please help 1. it takes you 9.5 mins to walk with an average velocity of 1.2 meters per second to teh north from the bus stop to the museum entrance. what is your displacement? i did: 9.5 * 60=570 570 * 1.2 = 684
January 30, 2009 by y912f

Physics
PLEASE ANSWER ASAP!!!!!!!!!!!!!!!!!!!!!!! a cross country runner runs 3km due east, 5km due south and 8km south west. what is the runners final displacement?
July 3, 2012 by Tap

Physics
PLEASE ANSWER ASAP!!!!!!!!!!!!!!!!!!!!!!! a cross country runner runs 3km due east, 5km due south and 8km south west. what is the runners final displacement and what direction?
July 6, 2012 by Tap

physics
a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed.
July 24, 2011 by presalie

physics
a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed.
July 24, 2011 by presalie

MATH
HELP? Exam in 20 mins -dont' have any idea how to do this question; please helpp.. anyone! PLEAZE A.S.A.P. minimize p= 15x +18y subject to x+2y<=20 3x + 2y>= 36 x>=0 y>=0
October 22, 2012 by GARNEL

Plz help Physics-bobpursley
A 200W lamp is totally immersed in 1500gm of water. How much will the temperature of the wtaer rise in 3 mins? Neglect heat losses from the water. Please dont put names in the subject...you limit yourself to who can respond, when others may be able and available. Again, please...
April 17, 2007 by Segun

HCA 220
I have to have a draft for my power point that is due in couple hours. Can anyone help. It has to be storyboard presentation
November 30, 2010 by Sharon

physics
a boat has a mass of 6800 kg. its engine generate a drive force of 4100 N, due west, while the wind exerts a force of 8000 N, due east, and the water exerts a resistive force of 1200 N due east. what is the magnitude and direction of the boats accelerations? (answer 0.309 m/s^...
January 31, 2014 by courtney

english
which is correct? a couple billions of dollar or a couple billion of dollars
February 10, 2008 by Eric

Earth Science
I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.
April 24, 2011 by George

math
A couple intends to have four children. Assume that having a boy and girl is equally likely event. a) List sample space b) Find the probability that couple has two boys and two girls; c) Find the probability that couple has at least one boy
January 23, 2012 by juan777

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
August 31, 2007 by Mary

Math
a car travelled 60 km in 25 mins. its speed is equilent to _____km/hour. In 2 1/3 hours this car travelled______km if it maintained at this speed. when you change mins to hour to you divide 60 into 25 to get the km/hour??? im confused. 60km/25 min. = 12km/5min 5 min. is 1/12 ...
April 13, 2007 by Anonymous

Earth Science
This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters April ...
April 24, 2011 by George

physics
A motorboat travels due north at a steady speed of 3.0 m/s through calm water in which there is no current. The boat then enters an area of water in which a steady current flows at 2.0 m/s in a southwest direction, as shown in the next picture. Both the engine power and the ...
August 16, 2012 by jhon

algebra
on a graph starting at 0 and sloping up to 480 on total # of words typed and 16 time in mins. Hannahs typing ability Kerry can type the same # of words in half the time. a)what rate does Hannah type? b)what rate does Kerry type? c)How many words can Kerry type in 8 mins?
February 13, 2011 by andrea

Economics
How could some these up a couple of lines: these are legal issues of the EU, i just need to describe them a a couple of sentences: decisions, regulations and directives
October 4, 2010 by Brogan

probability
a couple is planning to have three children. Find the probability that the couple will have: a.) 2 girls and 1 boy? b.) 2 girls followed by a boy? c.) at least 1 girl? please answer my question thank you very much, have a good day!
September 21, 2012 by nitz

Chemistry
How do you convert -2.1786*10^-18 J to kj/mole and this is the energy released when an electron is added to hydrogen nucleus. I been trying to figure this out for 30 mins and I still didn't get it please help
November 29, 2012 by Anonymous

physics
a man walks 5 km due North east, then 4 km due 30 degree N of E and finally 60 degree due S of E for 2 km. What is his final displacement with respect to his starting point ?
May 25, 2013 by aritrika

Physics
a powerboat heads due northwest at 15 m/s relative to the water across a river that flows due north at 4.8m/s what is the velocity of the motorboat and angle due west of north
December 18, 2012 by Baaiz

English
I am still confused about the use of 'a couple of' For example, if a person says, 'I have a couple of pens,' does it mean he has two pens or he has two, three, or four pens? I know in a colloquial expression, 'a couple of' means two, three or four? Am I right?
November 20, 2009 by rfvv

physics
in a racing competition a car is driving at 69km/h and the driver can complete 8 full circles in 6 mins. calculate the radius of the circular path in meters?
November 9, 2010 by Shea

math
If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx
November 26, 2012 by stephie 23

Math
A cell phone company offers two different plans. Plan A: Monthly fee of \$28 30 free minutes \$0.45 per additional minute   Plan B: Monthly fee of \$40 No free mins \$0.25 per additional minute Determine the time in the mins that results in the same monthly cost for both plans.
April 21, 2013 by Simitha

12. Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. It is a graph, so here are the coordinates: A is 1,8 B is 3,12 C is 4,4 A'' is 3, -3 B'' is 5, -6 C'' is 6, 2 Please help! I have no idea how to write a "sequence of transformations "!! I ...
February 5, 2013 by Delilah

physics
An animal-rescue plane ﬂying due east at 40 m/s drops a bale of hay from an altitude of 73 m . The acceleration due to gravity is 9.81 m/s^2. If the bale of hay weighs 177 N , what is the momentum of the bale the moment it strikes the ground? Please help!
January 2, 2014 by nick

The electrons in the beam of a television tube have a kinetic energy of 2.10 10-15 J. Initially, the electrons move horizontally from west to east. The vertical component of the earth's magnetic field points down, toward the surface of the earth, and has a magnitude of 5.00 10...
September 29, 2007 by Mary

Statistics
Professor does not teach from a book so am not sure how to apply this problem to the regression equation. Thanks in advance. Problem below. Cell Phone Mins= 3.5*cost + 25 where cell phone mins measure the number of minutes per month and cost is the dollar amount paid for the ...
April 17, 2011 by SROBSON

correct my paragraphs
The final cause for a couple to separate is abuse. An individual may be physically, emotionally, or sexually abused. One spouse may degrade his or her partner through harsh language. Drug and alcohol makes the person violent; in addition, there may be no physical or verbal ...
November 21, 2011 by caf

Physics
Sorry I am completly lost on this one and it is my last homework problem. Due in a couple of hours if someone could help. I would greatly appreciate it. A block is placed on an inclined plane. The acceleration of gravity is 9.8 m/s^2. What force is required to push the block ...
September 26, 2012 by Carrie

Physics
The flux density through a 200 turn coil of area 8.5*10^-4 m squared changes from 0.03 T to 0.12 T in 15 mins. Calculate the induced emf in the coil.
May 27, 2014 by Terry

Physics
A jogger travels a route that has two parts. The first is a displacement A of magnitude 2.70 km due south, and the second involves a displacement B that points due east. What is the direction of A + B relative to due south? ° What would be the direction of A - B relative to ...
August 18, 2010 by yoyoma

sience
a couple has just learned that their daughter has hemophilia. they alredy have a son who does not have the disease.what are the genotypes of the couple
December 2, 2013 by steve

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.05 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.15 N in a direction of 60° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
January 21, 2012 by Sushmitha

mathss
a combination lock has three dials, each numbered from 1-9. each combination consists of 3 digits, one from each dial. how many different combinations are possible? please help me i tried this for 10 mins i cant figure it out. thanks
August 5, 2009 by Julia Ten

physics
A jet makes a landing traveling due east with a speed of 100 m/s. If the jet comes to rest in 15.0 s, what is the magnitude and direction of its average acceleration? m/s2 due west due east
October 3, 2012 by Anonymous

Physics
The location of a car at times t1 and t2 is given by the position vectors r1= 15km due east + 20km due north (time t1) and r2= 13km due west + 25km due north (time t2) The units of distance are kilometers a. What is the magnitude l^rl of the displacement? b. What angle does ...
October 3, 2011 by Johana

A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this definitely is NOT a ...
November 2, 2010 by Jael

A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this definitely is NOT a ...
November 2, 2010 by Jael

PHYSICS
AVERAGE VELOCITY AND DISPLACEMENT HEATHER AND MATT WALK EASTWARD WITH A SPEED OF 0.98M/S. IF IT TAKES THEM 34 MINS TO WALK TO THE STORE, HOW FAR HAVE THEY WALKED?
September 5, 2007 by Susie

physics
A car moves 26km due east then 14km due north. It then turns along a path running north east with 15 km,then 17 km due west.If the time for the journey is 2 hrs,find the average velocity?
March 22, 2011 by muhammed

A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? How far would this person walk due east?
October 9, 2011 by Elle

Statistics
I have a take home test I am working on. Any help would be appreciated. Professor does not teach from a book so am not sure how to apply this problem to the regression equation. Thanks in advance. Problem below. Cell Phone Mins= 3.5*cost + 25 where cell phone mins measure the ...
April 17, 2011 by SROBSON

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show your work.
November 22, 2013 by Jacob

English
1. When is the report due? It is due on Monday. 2. When is the book due? It is due on March 10th. (Are the short dialogues correct?) 3. What are you saying? 4. What are you speaking? 5. What are you talking about? (Are the three commonly used and grammatical?)
March 9, 2010 by rfvv

math
Use synthetic division and the Remainder Theorem to find the indicated function value. f(x) = x5 - 8x4 - 9x3 - 6; f(3) I keep coming up with the answer of -222, but that is not an option... I don't know what I'm doing wrong!!! PLEASE HELP--I only have 20 mins left to submit ...
November 1, 2009 by me

Physics
A person walks 25.0 degrees north of east for 3.10 km. How far would another person walk due north and due east to arrive at the same location? I don't understand how I could calculate the needed distance accuratly. I used 3.1*sin(25) + 3.1*cos(25). But I still think I'm ...
August 25, 2009 by fred

math
A couple plans to invest money for the chld's education. What principle must the couple deposit when their child is born so that when she turns 18 she will have \$50,000. Assume the money earns 6% compounded monthly.
January 13, 2010 by yusuf

physics
A jet makes a landing traveling due east with a speed of 100 m/s. If the jet comes to rest in 15.0 s, what is the magnitude and direction of its average acceleration? due west or due east? How can I solve this question? You don't have to give me the answer but how you derive ...
October 4, 2012 by freshmen

history...sort of
i am doing a research project on media scares or media rumors that have frigntened people throughout history and how society has reacted to them. I already have the y2k scare and the war of the worlds brodcast scare. I would like a couple other scares to report about. please ...
May 3, 2011 by penny lane

Algebra 1B
This Question is in multiple sections. f(x)= -2x^2+2x+10 is the problem 1)What is the x coordinate of vertex in simplified fraction? 2)What is the y coordinate of vertex in simplified fraction? 3)What is the line of symmetry? 4)What is the maximum/minumum of f(x)? 5)The value ...
February 27, 2010 by LeAnn/Emergency Help Please