Wednesday

October 7, 2015
Number of results: 12,678

**physics**

If a car moving at 76.0 mph takes 500 ft to stop with uniform acceleration after its brakes are applied, how far will it take to stop under the same conditions if its initial velocity is 38.0 mph?.
*January 24, 2011 by MEL B*

**Physics**

Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 22.0 m/s. At the same time, car 2 is 1.4 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an acceleration of magnitude 3.0 m/s2 ...
*October 3, 2012 by Anonymous*

**Physics**

Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an ...
*October 4, 2012 by Brandon*

**physicss**

A car traveling 84 km\h is 150 m behind a truck traveling 67km\h. How long will it take the car to reach the truck?(Second) I'll got the answer and it was 30 second But I really dono how It was solved I need the wayyy;((
*October 16, 2011 by saly*

**PHYSICS**

A car traveling at a constant velocity of 30.0 m/sec passes an intersection at time t=0. 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how ...
*October 16, 2011 by Daniel*

**PHYSICS**

a car traveling at a constant velocity of 30 m/sec passes an intersection at time t=0 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how far...
*October 17, 2011 by PHY*

**math**

If a car is travelling at 35 MPH and rear ends another car, at what rate will the impact be?
*October 22, 2007 by MARY*

**physics**

A 250 kg car starting from rest is pushed 30m. When the car reaches 30m, it’s traveling at a speed of 12m/s and it encounters 52N of friction. What is the acceleration of the car and what is the force of the push on the car?
*December 1, 2010 by Alyssa*

**physics**

a 2250 kg car is traveling at 20 m/s to the west. the force required to stop the car at 7890 N to the east. How long will it take the car to stop? How far would the car move before stopping?
*February 25, 2014 by Karen*

**Integrated Algebra **

A Japanese bullet train leaves the station tra traveling west at 164 mph. A pigeon which was resting on the train is startled and starts flying east at 40 mph. After two hours, how far apart are the pigeon and the train?
*April 3, 2012 by DestinyLashea*

**math**

The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 70 mi/h can stop in 343 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft?
*February 26, 2013 by El*

**math**

A cyclist leaves his training base for a morning workout, riding at the rate of 18 mph. One hour later, his support staff leaves the base in a car going 52 mph in the same direction. How long will it take the support staff to catch up with the cyclist once the car leaves the ...
*September 21, 2010 by aaron kennedy*

**physics**

A delivery truck with a mass of 1700 kg is stopped in the street w/o its brakes on, when a small car hits it from behind. The car has a mass of 650 kg, and is traveling at 3.7m/s immediately before it hits the truck. Both the car and the truck have good bumpers, so assume the ...
*November 10, 2010 by aok*

**physics **

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?
*September 5, 2013 by Grace*

**Math**

A car is going 50mi/h after 5s. The car is traveling 30mi/h about how long does it take the car to stop
*August 9, 2014 by Carmen*

**Physics**

The speed time graph shows the motion of a car over a period of 40 seconds. a. describe the motion of the car between: 1.) O and A - The car is traveling at constant speed from 0 to 20 m/s. 2.) A and B - The car is at rest for 20 seconds. 3.) B and C - The car is decelerating ...
*February 5, 2013 by RR*

**Physics**

The speed time graph shows the motion of a car over a period of 40 seconds. a. describe the motion of the car between: 1.) O and A - The car is traveling at constant speed from 0 to 20 m/s. 2.) A and B - The car is at rest for 20 seconds. 3.) B and C - The car is decelerating ...
*February 5, 2013 by RR*

**math**

Mary and John are 128 miles apart. A car leaves Mary traveling towards John and another car leaves John at the same time traveling towards Mary. The car leaving Mary averages 10 miles per hour more than the other car and they meet after 1 hour and 36 minutes. What are the ...
*March 20, 2015 by Pater*

**Math**

Two boats start out from the same dock traveling at 9 mph and 12 mph respectively. The boats travel in slightly different directions and after 20 minutes are 2 miles apart. What is the angle that is formed by the paths of the two boats? I don't know how to set this up please ...
*January 16, 2014 by Cassie*

**Math check answer please**

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40mph, B is traveling at 44 mph. Train A passes a station at 820am, train B passes the same station at 850. At what time will train B catch up to train A. My estimate is 924am
*July 8, 2010 by Christy*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 259 m, and the car completes the turn in 38.0 s. a)Determine the car's speed.m/s b)What is the magnitude and direction of the ...
*October 18, 2012 by Karrine*

**Analytical Mechanics**

A car traveling at 100Km/hr smashes into a concrete abutment. Show that the collision is the equivalent to driving off the top of a ten story building. Allow 4 meter per story and neglect air resistance. Next, find the equivalent vertical height to represent the effect of a ...
*February 8, 2011 by Garrett*

**physics**

a car driving down a road due south at a constant speed of 55 mph. what is the car's acceleration? how do you know
*May 28, 2013 by Anonymous*

**physics**

A 1200 kg car is traveling at 45 km/h and hits a 1000 kg car parked on the edge of a 70 m deep canyon. What is the velocity of the two car wreck?
*January 12, 2011 by matt*

**physics**

Car traveling on circular track. Point A is at positive x,y. Point B is at positive x, negative y. A car is traveling around a horizontal circular track with radius r = 220 m as shown. It takes the car t = 51 s to go around the track once. The angle čA = 31° above the x axis, ...
*October 7, 2013 by Anonymous*

**physics**

the 900 kg car was traveling south and collided with the 2000kg car traveling west. they both got tangled and moved away from the impact point as one mass at 16.0m/s in the direction 24degrees west of south. what was the initial speed of each prior to the collision?
*August 11, 2014 by kristen*

**physics**

a car traveling at 43m/s decelerates at a rate of 7.1 m/s squared. how long did it take the car to stop? what distance did the car travel while stopping?
*March 27, 2014 by ben*

**Physics**

A 500 kg car experiences a frictional force of 3208 N while turning, if the car is traveling around a turn of radius 16 m what is the velocity of the car?
*January 15, 2015 by Brooke*

**Physics**

A 500 kg car experiences a frictional force of 3080 N while turning, if the car is traveling around a turn of radius 17 m what is the velocity of the car?
*January 20, 2015 by Brooke*

**algera**

The fuel efficiency for a certain midsize car is given by E(v) = −0.018v^2 + 1.440v + 3.9 where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. (a) What speed will yield the maximum fuel efficiency? Round to the nearest mile per hour...
*November 4, 2014 by Nate*

**Dynamics**

During a high-speed chase, a 2400-lb sports car traveling at a speed of 100 mi/h just loses contact with the road as it reaches the crest A of a hill. a) Determine the radius of curvature r of the vertical profile of the road at A. b) Using the value of r found in a part a), ...
*March 24, 2011 by Sarah*

**Physics**

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...
*January 24, 2015 by Anonymous*

**Physics**

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...
*January 24, 2015 by Anonymous*

**math(trig)**

1) A 6-ft propeller turns at 1200 revolutions per minute. Compare the angular velocity of the tip with the angular velocity at a point 10 in. from its center. 2) What is the angular velocity of a point on the tread of a 15-in. diameter tire on a car traveling 55 mph?
*December 6, 2010 by confused*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
*April 1, 2012 by sara*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear 271.2...
*April 1, 2012 by sara*

**ALGEBRA-MAT117**

Trains A & B are traveling if the same direction on parallel tracks. Train A is traveling at 100 miles an hour and Train B is traveling at 110 mph . Train A passes a station at 1:15 pm If Train B passes the same station at 1:45 pm what time will Train B catch up with Train A?
*April 30, 2009 by shauna*

**math**

if car one is traveling at 45miles per hr in one direction. How fast is car no 2 has to go from stoped state to catch up with car one after 15 miles assuming car 2 can go from 0-60 in 5 sec.
*November 12, 2012 by gus*

**Science**

A car weighing 24,500 Newtons is traveling east and travels a distance of 100 meters in 20 seconds. What is the car's mass? What is the car's kinetic energy?
*April 12, 2013 by Lele Reynolds*

**Help again...Math!!**

Two cars leave town going in the same direction. One travels 55 mph and the other travels 65 mph How long will it take before they are 180 miles apart? Hint: We do know that one car is 180 miles ahead of the other, so the slow car's distance can be represented by " d " and the...
*November 15, 2006 by Jessica*

**carrol high school**

A car brakes from 60 mph to a full stop in 4 seconds. Find the accelerayion of the car during this interval
*September 8, 2010 by physics*

**physics**

A car traveling 50 m/s has tires tires that with radii of 0.25 m. The driver of the car hits the brakes and brings the car to a stop in 5 seconds. What is the angular acceleration of the tires on the car?
*April 25, 2011 by bejay*

**physics**

Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a circular turn. Which statement is true about the acceleration of the cars? a.) acceleration of both cars is zero b.) car A is accelerating but car B...
*October 19, 2010 by jo*

**Physics**

A car accelarates from 40 mph to 60mph in 2.20 sec. determine the car's accelaration in gs. my answer is .911g Determine how far the car went during that 2.20 sec interval. 41.6 m
*February 3, 2010 by Gweedo8*

**College Physics**

suppose the two cars are headed in the same direction. A 1200kg car travels at 65 mph and a 1000kg car travels at 75mph. The faster car rear-ends the slower car and their bumpers catch so that they continue moving after the collision at the same speed. Use the concepts above ...
*March 22, 2012 by Anonymous*

**Physics**

An unmarked police car traveling a constant 90 km/h is passed by a speeder traveling 128 km/h. Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.80 m/s2 , how much time passes after the police car is ...
*September 6, 2015 by Anonymous*

**physics**

A jetliner is traveling east from Seattle to Chicago, a distance of 1,750 miles. The jetliner travels at an average air speed of 620 mph relative to the air. At the jetliner's altitude, the wind is blowing 46 mph to the east. How long does the journey take?
*June 15, 2015 by alex*

**physics**

A car with good tires on a dry road can decelerate at about 5.00m/s^2 when braking. If the car is traveling at 34.0m/s, how long does it take the car to stop under these conditions?
*June 14, 2011 by Rebecca*

**Algebra**

The fuel efficiency for a certain midsize car is given by E(v) = −0.017v^ + 1.462v + 3.5 where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. (a) What speed will yield the maximum fuel efficiency? Round to the nearest mile per hour. ...
*December 2, 2014 by Anonymous*

**college physics**

Imagine that your car can travel 25 mi on 1 gal of gas when traveling on a level road at 55mi/h. Estimate your gas mileage while traveling at 55 mi/h up an incline that gains 3m in elevation for every 100 m one goes forward along the incline. Assume that your car has a mass of...
*October 11, 2010 by Tommy*

**math**

Two trains are traveling the same direction, train a is going 60 mph and train b is going 70 mph, after one hour how long will it take train a to reach the point train b was at the hour marker.
*September 2, 2012 by kyle*

**Physics**

A car with a total mass of 1800kg (including passengers) is driving down a washboard road with bumps spaced 5.0m apart. The ride is roughest—that is, the car bounces up and down with the maximum amplitude—when the car is traveling at 6.1 m/s.What is the spring constant of the ...
*April 12, 2015 by Anonymous*

**math**

Two professional drag racers are speeding down a 1/4-mile track. If the lead driver is traveling 1.738 feet for every 1.670 feet that the trailing car travels, and if the trailing car is going 198 miles per hour, how fast in miles per hour is the lead car traveling?
*October 13, 2009 by Bob*

**physics**

A sports car, traveling 30 m/s, is 220 meters behind a truck. If the truck is traveling 22 m/s, how much time until the sports car passes the truck.
*September 16, 2015 by Emma*

** computer programing**

Car A, with a mass of 1250 kg, is traveling at 30 m/s to the east. A truck with mass of 2000 kg, traveling to the west at 25 m/s. An inelastic collision occurred, not sticking together, the car goes off 10 m/s to the west. What is the resulting velocity of the truck?
*April 12, 2013 by Amandos Leonard*

**Algebra!**

Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart? Hint: The time for both cars is the same and can be represented by "t." The total distance is 180 miles. The ...
*November 14, 2006 by Margie!!*

**Math**

Convert 2,640 feet per hour to miles per hour (mph) A) 5 mph B) 0.05 mph C)18 mph D) 0.5 mph
*September 18, 2012 by Sarah*

**Math**

Train A leaves Tigerville at 9 am traveling east at 85 mph. Train B leaves Liontown at 9:20am travelling west at 60 mph on the exact same tracks. Tigerville and liontown are 154 miles apart. At what time will the trains meet?
*February 14, 2015 by Connor*

**algebra**

A private plane traveled from Seattle to the rugged wilderness at a average speed of 176 mph. on the return trip the average speed was 308 mph. if the total traveling time was 5 hours. How far is Seattle to the wilderness? please help
*May 14, 2015 by Ann*

**Physics**

The driver of a 1350 kg car, initially traveling at 10.6 m/s, applies the brakes, bringing the car to rest in a distance of 15.0 m. Find the net work done on the car. Not sure how to set this problem up.
*October 5, 2011 by Help*

**physics**

you are traveling in your car at a velocity of 24.0 m/s east when you slam on your brakes. The force of friction on your car tires is 1.80x10^4 N. If the mass of you and your car is 1.50x10^3 kg, how far do you skid before stopping?
*October 22, 2011 by Anonymous*

**algebra**

Trains a and b are traveling in the same direction on parallel tracks. Train a is traveling at 40 mph and train b is traveling at 50mph. Train a passes a station at 12:15 a.m. If train b passes the same station at 12:27a.m. at what time will train b catch up to train a??
*April 14, 2010 by shana*

**Calculus**

"Two cars are traveling along perpendicular roads, car A at 40mph, car B at 60mph. At noon, when car A reaches the intersection, car B is 90miles away, and moving toward it. At 1PM the distance between the cars is changing at what rate?" So lost! Please help!
*January 24, 2012 by Chris*

**inter med algebre**

these were extra credit quest to help grade but i could not do these i asked so many people there were stumped can who gets this ques can u do the whole promlem pleasw. Questin; Pick a car and finf its top speed . Assuming that your chosen carnreaches its top speed at the top ...
*December 13, 2010 by Linda P**

**Algebra**

13. A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?: a. 14.7 mph b. 19.6 mph c. 24.8 mph d. 29.3 mph
*March 11, 2008 by Mike*

**physics**

a car traveling in a large circle passes by a motorcycle that is traveling in a straight line from North to South. both of their speedometers read 10m/s. which statement below is true? A. The car and the motorcycle have the same speed, but different velocities. B. The car and ...
*January 8, 2011 by Anonymous*

**Physics**

A car with a mass of 1815 kg is traveling down a road for 50 meters. It takes the car five seconds to travel this distance. Calculate the velocity, momentum, and kinetic energy of the car.
*January 13, 2013 by Eliza*

**Physics**

A car traveling at 20 m/s accelerates at 7 m/s2 for 3 sec. How fast is it now traveling? Please help!
*January 15, 2013 by Jamie*

**Physics**

An initially motionless test car is accelerated uniformly to 135 km/h in 8.08 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.695 seconds, after which the car is measured to be traveling at 87.5 km/h. What is the magnitude of the ...
*September 8, 2015 by Jordan*

**physics**

An experimental flywheel, used to store energy and replace an automobile engine, is a solid disk of mass 202.0 kg and radius 0.35 m. (a) What is its rotational inertia? (b) When driving at 22.4 m/s (50 mph), the fully energized flywheel is rotating at an angular speed of 3160 ...
*March 22, 2012 by opp*

**Physics**

A 1500 kg car is turning around an arc of radius 20 m at a constant speed of 30 mph without slipping. What is the friction force the ground exerts on the car?
*March 21, 2011 by James*

**physic**

You are traveling at a constant speed υM, and there is a car in front of you traveling with a speed υA You notice that υM>υA, so you start slowing down with a constant acceleration a when the distance between you and the other car is x. What relationship...
*September 29, 2013 by kolam*

**physics**

A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1 kN on the car as the ...
*October 5, 2012 by Vmel*

**physics**

Two vehicles with the same mass collide and lock together traveling 28 m/s at 37 degrees north of east after the collision. How fast was the car traveling that was heading north while the other vehicle was traveling east?
*November 21, 2009 by Josh*

**physics**

Two vehicles with the same mass collide and lock together traveling 28 m/s at 37 degrees north of east after the collision. How fast was the car traveling that was heading north while the other vehicle was traveling east?
*November 23, 2009 by ronnie*

**Physics**

Two cars are traveling along a straight road. Car A maintains a constant speed of 79 km/h and car B maintains a constant speed of 114 km/h. At t = 0, car B is 36 km behind car A. (a) How much farther will car A travel before car B overtakes it? ? km (b) How much ahead of A ...
*July 8, 2015 by Anonymous*

**Math help**

9). Hooke’s Law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 29 cm when the weight is 4 kg what is the distance when the weight is 9 kg? 10). Find the variation constant and an equation of ...
*May 28, 2010 by jim*

**math**

i cannot seem to make this work. If two trains leave the station at the same time, one traveling north and the other traveling south. the express travels 14 mph faster than the local. after 3 hours they are 315 miles apart. what is the rate of each train. this is what I ...
*February 7, 2011 by alicia*

**Math**

1.A tour boat on a river traveled 40 miles downstream in 4 hours. The return trip against the current took 5 hours. What was the rate of the current? A. 2.0 MPH B. 1.5 MPH C. 0.5 MPH D. 1.0 MPH This is also another question I did not understand. Thank you.
*February 3, 2015 by Tia*

**physics**

Al drives his car at a constant velocity of 60 mph.Bob start at rest at stoplight, then pushes the gas pedal, slowly speeding up until he reaches a velocity of 60 mph. explain how their position time graphs will look different.be detailed and use full sentences.
*April 30, 2012 by lisa*

**Physics**

A 850.0-kg car travelling on a level road at 27.0 m/s (60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m (200.1 ft). (a) Find the size of the horizontal force which the car applies on the road while stopping. (b) Find the stopping distance of that same car when...
*December 5, 2007 by Lindsay*

**math**

Boat A leaves point 1 for point 2 traveling at 52 mph. At the same time boat b leaves from point 2 to point 1 at 74 mph. Assume the distance from point 1 to point 2 is 882 miles. How long will it take them to meet? Give your answer in hours. A) 3 B) 4 C) 6 D) 7
*April 3, 2012 by Fabiola*

**Math**

Two trains are traveling opposite directions. One train travels at a speed of 90 mph. The second train travels at a speed of 95 mph. The 2 trains travel for three hours. How far apart are the 2 trains?
*January 20, 2015 by Haley*

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?
*October 24, 2011 by jane *

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?
*October 24, 2011 by jane *

**Physics**

A 1800 kg mass car is traveling south at a velocity of 15 m/s through an intersection. It is hit by a 3500 kg mass car traveling east at 20 m/s. If the two cars collide and become one object (perfectly inelastic). What will be the final displacement of the cars after the ...
*January 30, 2015 by Clara*

**Physics - elastic collision**

Car A, with mass of 1735kg, was traveling north at 45.5km/h and car B, with a mass of 2540kg, was traveling west at 37.7km/h when they collided at an intersection. if the cars stuck together after the collision, what was their combined momentum? Was the collision elastic or ...
*September 4, 2010 by Shaila*

**Physics**

Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. What is the ...
*September 5, 2011 by Kyle*

**physics**

A truck is traveling with a uniform velocity 24 m/s, when it passes a car at rest, at this instant the car starts to move and accelerate at the rate of 6m/s^2 in the same direction as the truck. a.) How long will it take the car to overtake the truck b.) How fast will the car ...
*September 9, 2011 by jesthony*

**physics**

Two cars are traveling in opposite directions on a two lane road. Car A starts from the origin at t =0 and accelerates (moving due East) from rest at 4 m/s2. At t = 0, Car B is moving due West with a velocity of 15 m/s and is 500 m east of car A but accelerating toward the ...
*February 16, 2011 by jake*

**physics**

Two cars approach an ice-covered intersection. One car, of mass 1.22 103 kg, is initially traveling north at 10.6 m/s. The other car, of mass 1.69 103 kg, is initially traveling east at 10.6 m/s. The cars reach the intersection at the same instant, collide, and move off ...
*November 29, 2012 by Anthony*

**PHYSICS**

A truck is traveling at 16 m/s to the north. The driver of a car, 500 m to the north and traveling south at 25 m/s, puts on the brakes and slows at 3.5 m/s2. Where do they meet? please help!! Let the truck position be X1 and the car position X2, measured along the same north-...
*September 26, 2006 by Katelyn*

**physics**

A car initially traveling at 31.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m...
*March 27, 2010 by Kelsey*

**Physics**

A car weighs 15000-N and is traveling along a highway at 27 m/s. If the driver immediately applies his brakes and the car comes to rest in 85 m, what net force acts on the car during its acceleration? How do you solve this to get an answer of -6564N? Thanks!
*December 22, 2010 by ihatephysics*

**Physics**

A police car is traveling east at 40.0 m/s along a straight road, overtaking a car ahead of it moving east at 30.0 m/s. The police car has a malfunctioning siren that is stuck at 992 Hz. What is the wavelength behind the police car in meters?
*December 6, 2009 by Keith*

**Physics**

A 1.3 X 10^3 kg car traveling with a speed of 2.5 m/s executes a turn with a 7.5 m radius of curvature. Calculate the centripetal acceleration of the car and the centripetal force acting on the car.
*May 24, 2010 by James*

**Chemistry**

A 1533 kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?
*March 29, 2014 by Harielle*

**Physics**

A 9500kg car traveling at 16m/s strikes a second car. The two stick together and move off with a speed of 6.0m/s. What is the mass of the second car?
*October 22, 2007 by Eddie*

**Math**

JJ's boat will go 15 mph in still water. If he can go 12 mph downstream in the same amount of time it takes to go 9 mph upstream, what is the speed of the current?
*March 25, 2012 by Sarah *

**Algebra! Help needed!**

I'm having a little trouble with this problem... Please try and walk me through the problem, too: #1. A motorboat leaves a dock and travels at an average speed of 15 mi/h toward an island. The average speed on the return trip is 10 mi/h. How far is the island from the harbor ...
*November 20, 2008 by Celina*