Friday

August 22, 2014

August 22, 2014

Number of results: 171

**physics**

A runner training for a race times 400 meter laps. Lap 1 60sec, Lap 2 57sec, Lap 3 55sec, Lap 4 53sec. What is the average velocity in meters per second? a. 0.563 b. 7.1 c. 14.2 d. 56.25
*February 23, 2010 by sadaf*

**physics**

A runner training for a race times 400 meter laps. Lap 1 60sec, Lap 2 57sec, Lap 3 55sec, Lap 4 53sec. What is the average velocity in meters per second? a. 0.563 b. 7.1 c. 14.2 d. 56.25 please help me, I using the average velocity formula but still i get it wrong
*February 26, 2010 by mary1111*

**science**

a runner training for a race times her 400 meter laps around a track. her times are lap 1 60 seconds, lap 2 57 seconds, lap 3 55 seconds and lap 4 53 seconds. what is her avaerage velocity in meters per second (m/s)?
*June 9, 2011 by Quetta*

**Physics**

A runner covers one lap of a circular track 40.0 in diameter in 63.3 . For that lap, what was her average velocity? If she covered the first half-lap in 28.6 , what were her average velocity for that half-lap?
*February 6, 2013 by Anonymous*

**math**

jamie ran two laps around a track in 99 seconds. how long did it take him to run each lap if he ran the first lap 8.5m/s and the second at 8.0m/s? Let t be the first lap time and L be the length of one lap. 8.5 m/s * t = L 8 m/s * (99-t) = L These two equations in two unknowns...
*November 28, 2006 by jean*

**Physics**

A runner covers one lap of a circular track 40.0 m in diameter in 62.5s (a) for that lap what were her average speed and average velocity? (b) if she covered the first half lap in 28.7 s, what were her average speed and average velocity for that half lap?
*June 3, 2009 by Sarah*

**physics**

A circular racetrack with 250m radius lies in the x-y plane and is centered at the origin. A car rounds the track counterclockwise starting at the point (250m , 0). Find the total distance traveled after one-quarter lap. Find the total displacement after one-quarter lap. Find ...
*February 8, 2012 by Tig*

**math**

The team practices in a pool that is 20 meters long. Sam completes a lap in 22.5 seconds. How long will it take Sam to complete a lap in an Olympic-sized competition pool that is 50 meters long if he swims at the same rate in both pools? (A lap consists of swimming from one ...
*January 16, 2014 by Anonymous*

**Math**

if a swimmer swam one lap in 32 seconds and the second lap in 45 seconds how do I calculate to find her total time?
*September 28, 2011 by Carma*

**Algebra**

Jamie ran two laps around a track in 99 s. How long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s?
*November 16, 2012 by Kevin*

**Physics**

A race car completes the final lap of a race on a 2-kilometer circular track. At the start of the lap, it crosses the line at 60 meters/second. It completes the lap 28.57 seconds later, crossing the line at 85 meters/second. Calculate the displacement and average acceleration ...
*June 29, 2012 by Henry*

**physics**

A race car completes the final lap of a race on a 2-kilometer circular track. At the start of the lap, it crosses the line at 60 meters/second. It completes the lap 28.57 seconds later, crossing the line at 85 meters/second. Calculate the displacement and average acceleration ...
*November 28, 2012 by alejandra aguinaga*

**Physics**

A bike racer is riding his new bike at Silverstone. The track is 4km long. a) What is his average speed in m/s if he does a lap in 2 minutes? b) What is his velocity after one lap?
*September 11, 2009 by Nabiha*

**physics**

A bike racer is riding his new bike at Silverstone. The track is 4km long. a) What is his average speed in m/s if he does a lap in 2 minutes? b) What is his velocity after one lap?
*September 11, 2009 by Nabiha*

**physics**

A runner covers one lap of a circular track 40.0 m in diameter in 62.5 s. Suppose initially the runner starts by going in the north direction. Assume the speed is constant for the first half-lap and then constant for the 2nd half-lap. Suppose instead the runner ran these same ...
*June 4, 2012 by cody*

**physics **

a racing car completes a lap of a 300 meter circular track in 20 seconds. the car's average speed for the lap is most nearly a)0.0m/s b)10m/s c)15m/s d)20m/s e)31.4m/s
*September 2, 2013 by sam*

**math please help Ms.Sue**

The team practices in a pool that is 25 meters long. Sam completes a lap in 22.5 seconds. How long will it take Sam to complete a lap in an Olympic-sized competition pool that is 50 meters long if he swims at the same rate in both pools? (A lap consists of swimming from one ...
*January 16, 2014 by Anonymous*

**math**

To qualify for the race, each driver must complete 2 laps of the track at an average speed of 100 mi/h. Benjamin averages only 75 mi/h on his first lap. How fast must he go on his second lap to qulify for the race?
*August 24, 2008 by monica*

**Math**

Alvin, Calvin and Melvin are running laps around a track. Alvin runs a lap every 4 minutes, Calvin runs a lap every 6 minutes and Melvin runs a lap every 9 minutes. If they start off at the same point, how many minutes will it take before all three of them are back at the ...
*June 11, 2013 by Tom*

**math**

Ann and Bob are cycling on a track. Ann completes one lap every 15 seconds, and Bob completes one lap every 18 seconds. When will Ann lap Bob, assuming that they started together?
*October 26, 2012 by Christina*

**Physics**

A running track consists of two straight 88.5m segments and two semicircles of radius 39.0m The distance a runner travels in one complete lap I calculated to be 422 m. How do you find the displacement in x.y of a runner who covers half a lap?
*February 4, 2014 by Marcus *

**Math**

Fred runs a lap every 2 minutes and Mark runs a lap every 2.5 minutes. They start together. How long will it be before they are next to each other again?
*January 19, 2012 by Don*

**math**

sherry ran one lap in 83.86 seconds, while della's time for one lap was 837/8 seconds. which runner had the faster time?
*October 20, 2008 by gill*

**English**

. Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary. a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed on my foot I ...
*October 15, 2011 by Aran*

**english**

Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary. a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed on my foot I realized...
*September 24, 2012 by lisa*

**english**

Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed on my foot I realized ...
*October 5, 2012 by cathy*

**Math**

Three pigs entered a race around a track. Piggly takes 6 minutes to run one lap. Piglet takes 3 minutes to run one lap and it takes Wiggly 5 minutes to run one lap. If all three pigs begin the race at the same time, how many minutes will it take for all three pigs to be at the...
*September 25, 2012 by Braydon*

**algebra**

Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes lapse between consecutive meetings of the runners? Express your answer as a mixed number.
*December 14, 2010 by Shane*

**math**

two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes elapse between consecutive meetings of the runners?Express your answer as a mixed number.
*December 15, 2010 by Shane*

**algebra**

two runners jog around an oval path at constant rates, but in opposite direstions. one runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? express answer as a mixed number.
*December 16, 2010 by Tom*

**algebra**

Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? Express your answer as a mixed number
*December 16, 2010 by mw*

**Math**

Pedro and Steve are running laps. Pedro runs a lap in 6 minutes and Steve runs a lap in 8 minutes. If they start at the same time, how many minutes will it be before they meet again at the starting point?
*April 1, 2008 by Anonymous*

**math**

In a motorcycle race, one lap of the course is 650 m. At the start of the race, John sets off 4 seconds after Tom does, but John drives his motorcycle 5m/s faster and finishes the lap 2.5 seconds sooner than Tom does. What is the speed at which each of them is driving? What is...
*January 24, 2011 by Taylor*

**math**

In a motorcycle race, one lap of the course is 650 m. At the start of the race, John sets off 4 seconds after Tom does, but John drives his motorcycle 5m/s faster and finishes the lap 2.5 seconds sooner than Tom does. What is the speed at which each of them is driving? What is...
*January 24, 2011 by Taylor*

**5th grade**

jose and sara are walking around the track at the same time. jose walks one lap every 8 min. sara walks a lap 6 min.what is the least amount of time they would both have to walk for them to cross the starting point together
*January 7, 2009 by asdfg*

**math**

in the formula d=rt the time t varies inversely with the rate r. a student running at 5 mph runs one lap around the school campus in 8 ninutes. if a second student takes 10 minutes to run one lap around the school campus, how fast is she running?
*February 28, 2012 by Michelle*

**Physics**

Another problem I need help with. An auto race is held on a circular track. A car completes one lap in a time of 20.1 s, with an average tangential speed of 43.1 m/s. Find the following. The following did not follow. I apologize for that. Here is the entire question. An auto ...
*March 14, 2007 by Jim*

**physics help please!**

A race car is one lap behind the lead race car when the lead car has 57 laps to go in a race. If the speed of the lead car is 66.2 m/s, what must be the average speed of the second car to catch the lead car just before the end of the race (i.e., right at the ﬁnish line...
*September 3, 2012 by Amanda*

**Math**

Bobby swims 3 laps every day during the summer. It takes him 15 seconds to swim from the ladder to the swimming lane, and he swims for a total of 135 seconds. The expression below can be used to find s, the number of seconds it takes Bobby to swim each lap. 135 = 3s + 15 How ...
*December 14, 2013 by Eden S.*

**Math**

Jess is running around a circular track, one lap every 40 seconds. Mackenzie is also running at a constant speed around the same track, but in the opposite direction. They meet every 15 seconds. How many seconds does it take Mackenzie to do one lap?
*December 5, 2012 by Jane*

**phsyics **

A car races on a circular track of radius r. (a) Write an equation for the car's average speed when it travels a complete lap in time t. (b) The radius of the track is 100 m and the time to complete a lap is 14 s. Show that the average speed around the track is 45 m/s.
*March 19, 2014 by price *

**Math**

Adam can run a lap on a certain circular track in 50 seconds. Grampy Sampy can run a lap on this track in 90 seconds. They start at the same location at the same time and move in the same direction. If they each run at a constant speed, how many seconds will it take before ...
*May 8, 2013 by Nate Williams*

**physics**

Adam can run a lap on a certain circular track in 50 seconds. Grampy Sampy can run a lap on this track in 90 seconds. They start at the same location at the same time and move in the same direction. If they each run at a constant speed, how many seconds will it take before ...
*May 13, 2013 by kathy wong*

**math**

Michael and mateo begin running around a circular track from the starting point at the same time. it takes Michael 48 seconds one lap around the track. it takes mateo 60 seconds to complete one lap around the track how many minutes does it take before the two boys will meet at...
*December 15, 2013 by jeffrey*

**physics**

At the Indianapolis 500 time trials, each car makes four consecutive laps, with its overall or average speed determining that car’s place on race day. Each lap covers 2.5 (exact). During a practice run, cautiously and gradually taking his car faster and faster, a driver ...
*September 29, 2012 by sammy*

**Maths**

A cyclist rides one lap of a circular track at a constant speed so that the riders distance, d meters, from the starting point at any time, t seconds, after starting is: d= (50) - ( 50cos x (pi)t/30, find: (a) the time taken to complete one lap (b) the radius of the track (c) ...
*June 21, 2012 by arif*

**computers ( basics)**

thanks sra i have a lap top my keys did not do this before
*August 16, 2008 by Lea*

**math 10c**

one lap in the swimming pool is 50m. how many yards is that!
*May 23, 2013 by charlene*

**physics**

a guy walks one lap at 35 miles per hour, what is his velocity?
*January 1, 2010 by carol*

**math**

how do I figure the circumference of race track that takes 3 lap to make a mile?
*December 17, 2013 by devin*

**math**

ANGULAR SPEED OF A RACE CAR. A race car is driven around a circular track at a constant speed of 180miles per hour. If the diameter of the track is 1/2mile, what is the angular speed of the car? Express your answer in revolutions per hour(which is equivalent to laps per hour) ...
*June 13, 2007 by michelle*

**physics**

A bug completes one lap along the edge of a circular planter of radius 14.4 cm in 12.94 s.
*September 20, 2012 by django*

**physics**

What is the magnitude of the displacement of a car that travels half a lap along a circle that has a radius of 170m ?
*September 14, 2010 by Taisiya*

**science**

A runner completes one full lap around a 400 meter track. What is her displacement?
*August 12, 2011 by abu*

**psychology**

26. Emily and her mother have entered a new place. There are toys on the floor to play with, but no one else is in the room. After a few months on her mothers lap, Emily begins to move toward the toys and is soon playing happily while her mother reads a magazine. When a ...
*July 25, 2013 by Katherine*

**English II**

Read the following poem and answer the question that follows. "I Like to See it Lap the Miles" by Emily Dickinson I like to see it lap the miles, And lick the valleys up, And stop to feed itself at tanks; And then, prodigious, step Around a pile of mountains, And, supercilious...
*November 12, 2013 by Laura*

**Physics**

An auto race is held on a circular track. A car completes one lap in a time of 19.2 s, with an average tangential speed of 39.8 m/s
*April 11, 2012 by Loweri*

**Physics**

A bug completes one lap along the edge of a circular planter of radius 22.4 cm in 16.45 s. How fast was it traveling? Answer in units of cm/s.
*September 9, 2012 by Jess*

**spnaish Sra Mcguin**

i just got a new lap top and I am setting up my im and stuff this afternoon - hope your hand is feeling better
*February 9, 2008 by sam*

**spnaish Sra Mcguin**

i just got a new lap top and I am setting up my im and stuff this afternoon - hope your hand is feeling better
*February 9, 2008 by sam*

**math 2**

a typical lap around a track in the united states has a length of 440 yards. how many laps would need to be completed to run a mile?
*February 12, 2014 by Jenny plus*

**physics**

A figure skater is warming up on the rink. She does a lap of a 100m rink. She completes the laps in 3 minutes. What was her speed?
*September 19, 2011 by dave*

**physics**

a cyclist completes a lap around a circular track at a speed of 10m/s in 40s what is the displacement of the cyclist
*November 24, 2012 by ivan h*

**physics**

a bike racer is riding on his new bike at silverstone. The track is 4km long. What is his average velocity over one lap?
*January 27, 2010 by Lucy*

**science**

if 4 cars were going 100m the entire time what happens to speed,velocity and accelerationas one car completes one full lap
*January 23, 2014 by ben*

**Physics**

A runner with mass 100 kg jogs around a circular track with circumference 1 km. If he does one lap in 6 min, what is his angular momentum about the center of the track?
*February 4, 2011 by Angular Momentum*

**physics**

A senior citizen walks 275 m in 25 min going around a shopping mall. If she wants to increase her average speed by 25 % in walking a second lap, what would her travel time in minutes have to be?
*June 1, 2014 by KJ*

**math!!!!**

One lap around the track is equal to 1/8 of a mile. A horse ran a distance of 9 laps in 2 minutes and 30 seconds. What was the horse's average speed in miles per minute?
*February 9, 2014 by Lidia*

**physics**

A 625-kg racing car completes one lap in 14.3 s around a circular track with a radius of 55.0 m. The car moves at constant speed. (a) What is the acceleration of the car?
*October 26, 2010 by rachel*

**phyisics**

A 615 kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. (a) What is the acceleration of the car?
*February 14, 2012 by matt*

**geometry and measurement**

A pool designed for lap swimming is rectangular in shape with a uniform depth of 4.5 feet. If the pool is enlarged so that it holds twice as much water, which of the following statements could be true?
*February 6, 2013 by dave*

**algebra**

keisha told her swim coach that she would swim at least half a mile. If one lap is 50 yards, what is the fewest number of laps she must swim?
*October 15, 2008 by nikki*

**11th grade**

A 625-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. (a) What is the acceleration of the car?
*November 29, 2010 by john*

**Physics Help, check work?**

A running track consists of two straight 88.5m segments and two semicircles of radius 39.0m as shown in the figure. Part A was finding the distance a runner travels in one complete lap. d= 422 m. No problem. Then part B asks for the displacement in x, y components of a runner ...
*February 7, 2014 by Ebian*

**math**

There is a lap swimming pool is a rectangle with the depth of 4.5 feet. If the water is doubled is it the width, length, and depth doubled?
*March 4, 2012 by Anonymous*

**Algebra**

If each lap in a swimming pool is 100 meters long how many laps does it take to go a mile. I know there are 1609.344 meters in a mile, but what do I do from there?
*October 14, 2009 by Tyler*

**Diversity**

caregiver behaviors such as ignoring children'ssound babbling back to baby or repositioning the child on one 's lap are indicative of variable levels of a imitative play b. pattern training c. responsivity d.social awareness I CHOSE "c" AS MY ANSWER. PLEASE CHECK THIS FOR ME. ...
*December 28, 2010 by Karol*

**Physics**

A track athlete runs exactly one complete lap of the track, 400 m circumfrence, in 4.35x10^1 seconds. What is the speed of the athlete , to two significant figures, if they are assumed to run with a constant velocity for the entire time?
*October 14, 2010 by annonomus*

**English**

Direct or indirect quote? "Want to jog a lap with me, Dad?" asked David. "Sure, but let's take it slow," said Dad. Is it direct quote?
*August 11, 2012 by Emma*

**physics**

what is the magnitude of the displacement of a car that travels half a lap along a circle of radius 150m? would the answer be half of the circumference or would it be the diameter of the circle?
*October 19, 2008 by Anonymous*

**Math**

4 members of a relay team each ran one lap of a race. THeir times were 58.4 seconds 58.07 seconds 57.8 seconds and 58.46 seconds. Put the numbers in order from fastest time to slowest time 57.8 58.07 58.40 58.46
*October 16, 2012 by Jerald*

**Math**

The first lap of an auto race is 2000 meters. This 5% of the total race distance. What is the total distance?
*April 5, 2012 by Karen*

**Physics**

A track athlete runs exactly one complete lap of the track, 400 m circumfrence, in 4.02x10^1 seconds. What is the velocity of the athlete , to two significant figures, if they are assumed to run with a constant velocity for the entire time?
*October 14, 2010 by annonomus*

**math**

Anna and Jamie were at track practive. The track is 2/5 kilometers around. Anna ran 1 lap in 2 minutes. How many minutes does it take Anna to run one kilometer?
*December 3, 2012 by Liam*

**Physics.**

A car starts a race from rest on a circular track and has a tangential speed of 43 m/s at the end of the third lap. The track has a radius of 91 m. If it has constant angular acceleration, what is the magnitude of its tangential acceleration? Help me and please explain in ...
*June 9, 2012 by Mellanie*

**physics**

A senior citizen walks 0.36km in 11min , going around a shopping mall.What is her average speed in meters per second?If she wants to increase her average speed by 30\% when walking a second lap, what would her travel time in minutes have to be?
*September 8, 2012 by abu hayu*

**physics**

A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 45.0 m. The car moves at constant speed. (a) What is the acceleration of the car? m/s2 (b) What force must the track exert on the tires to produce this acceleration?
*January 6, 2012 by bob*

**Physics**

A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 55.0 m. The car moves at constant speed.(a) What is the acceleration of the car?(b) What force must the track exert on the tires to produce this acceleration?
*October 25, 2012 by Jamal*

**Math**

A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?
*December 3, 2012 by Noah*

**physics**

A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. (a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?
*December 7, 2012 by Noah*

**physics**

nitrigen gas is used to inflate the tyres of Lewis Hamilton's racing car if the tyre is inflated to a pressure of 2,2 atm at 25 degrees celcius and he takes the car for a lap it heat up to 50 degrees celcius what is the pressure at this temperature
*May 26, 2010 by moeketsi*

**math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that correct?
*October 23, 2012 by Mark*

**physics help**

An auto race is held on a circular track. A car completes one lap in a time of 16.9 s, with an average tangential speed of 48.1 m/s. Find the following (a) the average angular speed (b) the radius of the track i found part a which was .3716 but need help with part b please
*November 19, 2010 by william*

**algebra**

joe is going to build a retangular lap pool. the perimeter of the pool will be 240 feet. the length of the pool will be 20 feet more than 3 times the width. find the length and width
*January 18, 2012 by Sammie*

**math**

Jessica is swimming in the 500 meter race. It takes her 1 minute and 35 seconds to swim one lap in an Olympic sized pool(it's only 50 meters long). How long will it take her to swim the 500 meter race?
*January 16, 2014 by Anonymous*

**math**

Four runners ran the relay, Bill ran his lap in 22.738 seconds, Troy ran in 21.874 seconds, Grace ran in 20.32 second, and Jessica ran 19.047 seconds. Estimate the team's total time to the nearest tenth of a second
*January 17, 2014 by Jess*

**physics**

A figure skater is warming up on the rink. She does a lap of a 100m rink. She completes the laps in 3 minutes. What was her speed? Answer a. 33.3 m/min b. 300 m/min c. 66.7 m/min my answer b.300 m/min ?????
*September 19, 2011 by dave*