Wednesday

May 27, 2015

May 27, 2015

Number of results: 31,745

**Algebra**

During the first part of a trip a canoeist travels 49 miles at a certain speed. The canoeist travels 25 miles on the second part of the trip at a speed of 5mph slower. The total time for the trip is 5hrs. What was the speed on each part of the trip?
*November 9, 2011 by Kelly*

**algebra**

During the first part of a trip, a canoeist travels 69 miles at a certain speed. The canoeist travels 2 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 3 hrs. What was the speed on each part of the trip?
*November 16, 2011 by Nancy*

**Physic**

The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the 30 cm high hole? What...
*May 7, 2011 by Bret*

**math**

a truck driver traveled at an average speed of 48 miles per hour on a 100-mile trip to pick up a load of freight. On the return trip with the truck fully loaded,the average speed was 40 miles per hour. Find the average speed for the round trip.
*March 7, 2010 by donna*

**Algebra**

A truck driver traveled at an average speed of 58 miles per hour on a 200-mile trip to pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 37 miles per hour. Find the average speed for the round trip.
*January 19, 2013 by olga*

**College Algebra**

A truck driver traveled at an average speed of 55 miles per hour on a 200-mile trip pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 40 miles per hour. What was the average speed for the round trip?
*February 3, 2015 by Monica *

**physics**

A solid rod of mass M = 1.00 kg and length L = 85 cm is suspended by two strings, each with a length d = 83 cm (see Figure), one at each end of the rod. The string on side B is cut. What is the magnitude of the initial tangential acceleration of end B? The string on side B is ...
*March 13, 2012 by Katie*

**Pre-Calculus**

The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ...
*August 30, 2008 by Lucy*

**Pre-Calculus**

The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ...
*August 31, 2008 by Lucy*

**Pre-Calculus**

The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ...
*September 2, 2008 by Lucy*

**Pre-Calculus**

The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ...
*September 13, 2008 by Lucy*

**Physics**

During a long airport layover, a physicist father and his 8-year-old daughter try a game that involves a moving walkway. They have measured the walkway to be 41.5 m long. The father has a stopwatch and times his daughter. First, the daughter walks with a constant speed in the ...
*January 27, 2015 by Chris*

**Physics Help**

During a long airport layover, a physicist father and his 8-year-old daughter try a game that involves a moving walkway. They have measured the walkway to be 41.5 m long. The father has a stopwatch and times his daughter. First, the daughter walks with a constant speed in the ...
*January 29, 2015 by Anonymous*

**science**

A 50 kg skier is pulled up a frictionless ski slope that makes an angle of 8 degrees with the horizontal by holding onto a tow rope that moves parallel to the slope. Determine the magnitude of the force of the rope on the skier at an instant when a) the rope is moving with a ...
*November 12, 2006 by Ren*

**Math**

Flying to the wind, an airplane takes 4 hours to go 960 km. The same plane flying with the wind takes only 3 hours to make the same trip. Find the speed of the plane and the speed of the wind. I wasnt here for the lesson from my teacher but told me to ask my classmates but ...
*February 21, 2015 by Njex*

**Math**

Can someone help me do an example like this one. State the application, give the equation of the quadratic function, and state what the x and y in the application represent. Choose at least two values of x to input into your function and find the corresponding y for each. ...
*November 24, 2007 by Alicia*

**math**

a car is driving at a speed of 60 mi/h. What is the speed of the car in feet per minute?
*November 28, 2010 by ty*

**Math**

A commercial airplane has a takeoff speed of about 300 km/h. What si the takeoff speed in mi/h?
*January 17, 2011 by Lexi*

**math**

distance of 12 km was walked at a speed of 4 km/h on the way, and 6 km/h on the way back.What was the average speed?
*October 20, 2012 by wan*

**science**

You are traveling at a speed of 42 miles in .75 hr and slow to a speed of 42 miles in 1.25 hr. What is your rate of declaration?
*September 24, 2013 by Robert*

**Chemistry**

Light travels at a speed of 3.00 times 10^10 cm/s. What is the speed of light in kilometers/hour?
*February 21, 2014 by Kelsi*

**physics**

A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for next 1 km. What is the average speed of the car ?
*January 1, 2015 by sana*

**English**

1.All of the balloons on the string (popped) except two. 2.Do you (want) to buy those books? 3.Daniel's dog is (following) the trail to the river's edge. 4.For thirty years the noon whistle has (blown) exactly on time. 5.The players have (challenged) their parents to a game of...
*January 28, 2011 by Hayley*

**physics**

a sled slides down a frictionless hill. if the sled starts from rest at the top, its speed is 7.5 m/s. a.) on a second run , the sled starts with a speed of 1.5 m/s at the top.. will it end with less than 9 m/s, 9 m/s, or more than 9 m/s b.) find the speed of the sled at the ...
*December 2, 2009 by tanya*

**Physics**

A 0.300-kg ice puck, moving east with a speed of 5.86m/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic. What is the speed of the 0.300-kg puck after the collision? What ise the speed of the 0.990-kg puck after ...
*October 10, 2014 by Pat*

**physics**

A 0.300-kg ice puck, moving east with a speed of 5.86m/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic. What is the speed of the 0.300-kg puck after the collision? What ise the speed of the 0.990-kg puck after ...
*October 10, 2014 by Saya*

**physics**

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials boat pulls up next to the spys boat, both boats reach the edge of a 5.0 m waterfall. The spys speed is 15 m/s and the officials speed is 24 m/s.How far apart...
*October 30, 2014 by Anonymous*

**Physics**

a body (A) is moving with a speed of 250m/s in the positive x-direction, collides with body (B) initially at rest and having the same mass as (A). after collision the speed of body (A) is 100m/s making 30 degree with the horizontal. the speed and direction of body (B) after ...
*August 25, 2012 by Help, Thankyou*

**Chemistry**

I've tried this problem over and over again, but im not getting the right answers! This is the problem....... Dinitrogen pentoxide, N2O5, decomposes when heated in carbon tetrachloride solvent. N2O5 2 NO2 + 1/2 O2(g) If the rate constant for the decomposition of N2O5 is 6.2...
*November 10, 2009 by Dena*

**Angular acceleration**

A flywheel of 480 mm diameter is accelerated with an angular velocity of 0.4 rad/s^-2 from rest by an electric motor until it is rotating at 400 revs/minute. Calculate: a) the time of acceleration b) the linear speed of the rim of the flywheel My answer for (a) is 104.7 secs, ...
*January 21, 2007 by Jim (BIGEYE)*

**fizik**

please help.. i really need the answer as soon as possible.. Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to ...
*April 11, 2011 by irna*

**asap **

To get to school Eliza walks east to the corner of her street and then turns north 90 degrees to the left when she reaches the school she realizes that she forgot her lunch and turns southwest 144 degrees to the left to face her house she then walks straight toward her house ...
*February 7, 2013 by noahc*

**Math**

1. The height of a bumble bee above the ground is modelled by h(t) = 0.5cos(2π t) + 2, where h is in metres and t is in seconds. At what time is the bees instantaneous rate of change of height with respect to time greatest? a.) 1 s b.) 1.25s c.) 1.5s d.) 2s Why is the ...
*January 18, 2012 by Jake*

**Algebra1**

1. A bicycle racer covers a 75 mile training route to prepare for an upcoming race. If the racer could increase his speed by 5 mph, he would complete the same course in 3/4 of the time. Find his average rate of speed. 2. Nina drove for 6 hours at an average rate of 50 mph. ...
*April 18, 2013 by Sam*

**Physics**

Can someone provide me some input on the question below. Please respond. A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. The string rotates at an angular speed of ...
*March 14, 2007 by Jim*

**Physics**

A uniform thin ring of charge, with radius 5.20 cm and total charge 6.60 C, is located in the yz-plane and centered on the origin. (In other words, the x-axis passes through the center of the ring, and is perpendicular to the ring.) A particle of mass 17.9 g and charge 4.80 ...
*November 1, 2010 by Rudi*

**Physics**

You are flying in a light airplane spotting traffic for a radio station. Your flight carries you due east above a highway. Landmarks below tell you that your speed is 46.0 m/s relative to the ground and your air speed indicator also reads 46.0m/s. However, the nose of your ...
*February 3, 2010 by Anonymous*

**math-calculus**

a plane flew from red deer to winnipeg, flying distance of 1260 km. on the return journey, due to a strong head wind, the plane travelled 1200 km in the same time it took to complete the outward journey. on the outward journey, the plane be able to maintain an average speed ...
*January 8, 2012 by Shreya*

**Physics**

A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential energy when it has ...
*December 4, 2011 by Mack*

**physics**

A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential energy when it has ...
*December 4, 2011 by Mack*

**8th grade science**

How do you do a ball dichotomy?
*August 23, 2009 by Madison*

**Science**

Explain why the vacuum ball does not separate.
*March 13, 2011 by None*

**Science**

The force of a 4 kg bowling ball to accelerate to 6 m/s2
*November 4, 2011 by Nora*

**physics **

A 25N ball is lifted 100CM=
*January 10, 2012 by Anonymous*

**physics **

if you throw a 0.2 kg ball strait up at 8 m/s how high will it go
*March 23, 2014 by AMY*

**Physics**

if you throw a 0.2 kg ball straight up at 8 m/s how high will it go
*March 23, 2014 by Ana*

**physics **

if you throw a 0.2 kg ball straight up at 8 m/s how high will it go
*March 24, 2014 by AMY*

**physics**

What is the velocity of the fallen ball that has 5kg
*October 18, 2014 by Anonymous*

**Help Pleasee!!**

1.Select the community activity that is a healthy choice to promote fitness for all ages A.annual 5K fun run for charity<--- B.annual state fair C.monthly movie in the park D.monthly laser light show at the planetarium 2.Mollie is well respected by her teammates even though...
*February 27, 2014 by Jessica *

**physics**

The siren on an ambulance is emitting a sound whose frequency is 2421 Hz. The speed of sound is 343 m/s. (a) If the ambulance is stationary and you (the "observer") are sitting in a parked car, what are the wavelength and the frequency of the sound you hear? (b) Suppose that ...
*January 29, 2013 by carter montgomery*

**Algebra**

According to the Guiness Book of World Records, the peregrine falcon has a record diving speed of 168 miles per hour. Write the speed in feet per second.
*October 15, 2007 by Mary*

**physics**

A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.0 m/s as in the figure below. If his speed is 26.7 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.
*October 4, 2008 by Sandhya*

**Physics**

Catching a wave, a 65 kg surfer starts with a speed of 1.3 m/s, drops through a height of 2.10 m, and ends with a speed of 8.2 m/s. How much nonconservative work was done on the surfer? I have genuinely no idea how to solve this problem.
*March 29, 2010 by Carden*

**physics**

ottawa is about 8 hours drive from x. assume that you are moving non-stop with constant speed of 100km/h how much faster would it take for you to travel if you were moving with the speed of light
*April 5, 2010 by he*

**physics**

The speed in air is 343m/s. Using the relationships3.3 feet in a meter, 5280 feet in a mile, and the time relationships you know, determine the speed in miles per hour. (answer:772mi/h)
*September 10, 2010 by Anonymous*

**College Physics**

A 1200 kg airplane starts from rest and with a constant average forward acceleration of magbitude 5.0 m/s, reaches its takeoff speed in 9.00 s. The runway is 300 m long. What is the plane's takeoff speed?
*September 14, 2010 by Dakota*

**college physicalscience**

the air speed of a plain is 223km/h and the pilot keeps the plane pointed north. A wind is blowing73.6km/h from the west. Determine the speed (in km/h) of the plane relative to the ground
*September 19, 2010 by tiana*

**physics**

An athlete executing a long jump leaves the ground at a 20 angle and travels 7.80 m. (a) What was the takeoff speed? 1._____ m/s (b) If this speed were increased by just 5.0%, how much longer would the jump be? 2.______ m
*September 21, 2010 by jake*

**Physics**

A daredevil on a motorcycle leaves the end of a ramp with a speed of 33.0 m/s as in the figure below. If his speed is 31.3 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.
*October 13, 2010 by Abdullah*

**physics**

A 2.20 kg box slides down a rough incline plane from a height h of 1.39 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction
*November 21, 2010 by help*

**physics**

You are driving in your car and you apply a constant force to your brake pedal. Which of the following are changing? (Ignore air resistance) a. Speed b. Velocity c. Acceleration d. Speed and Velocity e. All of the above
*February 2, 2011 by Victor*

**physics**

A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.5 m/s as in the figure below. If his speed is 27.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.
*March 9, 2011 by Allie*

**Physics**

Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.
*April 15, 2011 by Brittney*

**chemistry**

if the rms speed of NH3 molecules is found to be 0.510 km/s what is the temperature (in Celcius)? can someone solve this using the formula c=((2.55*R*T)/M)^1/2 c is the speed r is 8.314 constant M is the molar mass of NH3 17.031
*August 5, 2011 by Henry*

**physics**

The actual speed of electrons drifting along in a common electric circuit is about the speed of which of the following?. A) sound.B) a fast-moving automobile.C) light.D) a slow-moving snail.
*April 14, 2012 by britches*

**physics**

A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s. (b) What is the average value of the coefficient of kinetic friction between puck and ice?
*October 5, 2012 by Anonymous*

**algebra**

The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.
*November 7, 2012 by Samantha*

**physics**

Suppose the roller coaster in Fig. 6-41 (h1 = 34 m, h2 = 10 m, h3 = 30) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one fourth of its weight, with what speed will it reach point 2? The distance traveled is 60.0 m.
*November 26, 2012 by Sarah*

**physics**

Suppose the roller coaster in Fig. 6-41 (h1 = 38 m, h2 = 11 m, h3 = 25) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 45.0 m.
*November 29, 2012 by bob*

**Intermediate Algebra**

The speed of a boat in still water is 29mph. if the boat travels 140mph downstream in the same time that it takes to travel 92miles upstream, find the speed of the stream.
*December 2, 2012 by Wanda*

**Physics**

c) A penny sits 12 cm from the center of a record turning at 33 1/3 rpm. What is the tangential speed in m/s? d) A mass spins with a tangential speed of 1.2 m/s on the end of a string which is 0.75m long. What is the period of the rotation in seconds?
*January 3, 2013 by Alex*

**Physics**

c) A penny sits 12 cm from the center of a record turning at 33 1/3 rpm. What is the tangential speed in m/s? d) A mass spins with a tangential speed of 1.2 m/s on the end of a string which is 0.75m long. What is the period of the rotation in seconds?
*January 3, 2013 by Alex*

**Physics**

A 17000 kg railroad car travels along on a level frictionless track with a constant speed of 23.0 m/s. A 5100 kg additional load is dropped onto the car. What then will be its speed in meters/second?
*July 10, 2013 by Zach*

**Physics**

The object in the figure has a mass of 3.45 kg and is pulled up a slope AB, which is 36 m long; the height BC is 3.00 m. There is no friction and the acceleration is constant. The speed v1 at A is 3.5 m/s whereas the speed v2 at B is 5.5 m/s. The average power developed by the...
*February 22, 2014 by kjean*

**science**

A man moves on his bike with 54km/h and takes u- tune (180 degree)and continues it speed to move with same speed .the time of u-tune is 10sec.find its average accleration
*July 2, 2014 by roli*

**physics**

Suppose a roller-coaster car starts at a height of 39 m with a speed of 2.51 m/s. What will its speed be at height = 0m if the average force of friction is equal to 0.22 times its weight? The total distance traveled is 53m.
*October 13, 2014 by robbie*

**math**

The record for the fastest speed on a bicycle is 133 kilometers per hour. How long would it take a person traveling at this speed to travel 365.75 kilometers? hours and minutes
*January 7, 2015 by gabrielle*

**physics**

A projectile of mass 0.777 kg is shot from a cannon, at height 6.6 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.8m/s. The projectile rises to a maximum height of ∆y above the end of the cannons barrel and strikes the ...
*October 4, 2011 by steve*

**physics**

Coasting due west on your bicycle at 7.9 , you encounter a sandy patch of road 7.0 across. When you leave the sandy patch your speed has been reduced by 2.0 to 5.9 . 1. Assuming the sand causes a constant acceleration, what was the bicycle's acceleration in the sandy patch? ...
*September 10, 2012 by Rach*

**physics**

A bicycle has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. The cyclist pedals at a steady cadence of 76.0 rev/min. The chain engages with a front sprocket 15.2 cm in diameter and a rear sprocket 7.00 cm in diameter. Calculate: a) the speed of a link of the chain ...
*November 4, 2008 by Mischa*

**physics**

A 124- balloon carrying a 22- basket is descending with a constant downward velocity of 16.3 A 1.0- stone is thrown from the basket with an initial velocity of 18.7 perpendicular to the path of the descending balloon, as measured relative to a person at rest in the basket. The...
*September 30, 2010 by =]*

**English**

1.All of the balloons on the string (popped) except two. 2.Do you (want) to buy those books? 3.Daniel's dog is (following) the trail to the river's edge. 4.For thirty years the noon whistle has (blown)exactly on time. 5.The players have (challenged) their parents to a game of ...
*January 25, 2011 by Tracy*

**PHYSICS**

A car is traveling 27 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 8.0 m/s2. How far does the car go before it stops? please help!! Since he's going 27 m/s, and he takes 0.8 s to react, then he goes (27)(...
*September 26, 2006 by Katelyn*

**Pre-Calc**

You are taking a road trip in a car without A/C. The temperture in the car is 93 degrees F. You buy a cold pop at a gas station. Its initial temperature is 45 degrees F. The pop's temperature reaches 60 degrees F after 23 minutes. Given that \frac{T-A}{T_0 - A} = e^{-kt} where...
*October 20, 2014 by Anonymous*

**Mathematics**

Project A requires an initial outlay of $6,000,000 but will return $4,000,000 at the end of each year 1, 2, 3 and 4 whereas project B requires an initial outlay of $2,400,000 but will return $3,500,000 at the end of years 1, 2, 3 and 4. (i) calculate the NPV of each project if...
*June 22, 2010 by Gibbons*

**Physics**

To qualify for the finals in a racing event, a race car must achieve an average speed of 225 km/h on a track with a total length of 1.4 km. If a particular car covers the first half of the track at an average speed of 205 km/h, what minimum average speed must it have in the ...
*June 15, 2014 by Piper*

**physics**

A 0.500 ice puck, moving east with a speed of 6.70 , has a head-on collision with a 0.700 puck initially at rest. Assuming a perfectly elastic collision, what will be the speed of the 0.500 object after the collision? What will be the speed of the 0.700 object after the ...
*February 2, 2012 by andrew*

**Science**

A 0.500 kg ice puck, moving east with a speed of 3.30 m/s, has a head-on collision with a 0.900 kg puck initially at rest. Assuming a perfectly elastic collision, (a) what will be the speed of the 0.500 kg object after the collision? (b) What will be the speed of the 0.900 kg ...
*November 25, 2012 by nammilee_2012*

**algebra**

A boy walked for 4 hours and cycled for 3 hours,covering a total distance of 74 kilometers,later he walked for 2 hours and cycled for 4 hours ,covering 82 kilometers,what were his average speed of walking and his average speed of cycling if his speed was constant in the two ...
*March 13, 2013 by 007*

**physics**

1) What average power is required for a runner with a mass of 85 kg to reach a speed of 8 m/s from a stationary start during a time of 2 s? 2) A 1000 kg car travels east at 30 m/s and collides with a 3400 kg truck travelling south at 20 m/s. After the collision the two ...
*March 29, 2015 by k*

**probablity**

You are off to soccer and love being a goalkeeper, but that depends who is the coach today : - with coach Ahmed the probablity of being a goalkeeper is 0.5 -with coach Usman the probability of being a goalkeeper is 0.3 Ahmed is coach more often.About 6 out of every 10 games ( ...
*May 3, 2013 by arzam*

**Math**

y = 0.005x^2-0.801x+46.928 ^ Using that model above, how di I determine the cost per km to the nearest tenth of a cent, at a speed of 70 km/h? I think I use a graphing calculator for this, and since speed is the x value I probably have to insert in 70.
*December 7, 2011 by -Untamed-*

**algebraA**

lond distance trucker traveled 156 miles in one directionduring a storm. Thereturn trip in rainy weather was accomplished at double the speed and took 3hrs less time. Find the speed going.
*June 1, 2012 by ll*

**Mechanics**

A 1000-kg car whose motor delivers a maximum power of 40.0 hp to its wheel can maintain a steady speed of 130 km/h on a horizontal roadway. How large is the friction force that impedes its motion at this speed? Show the solution and answer
*September 15, 2013 by Jason*

**math**

An airplane travels with a speed of 145 mph in calm air. the wind is blowing with a velocity of 23 mph from N72degreesE. If the plane is headed in a direction N63W, find the magnitude of the speed and the direction of the airplane with reference to the ground. In what ...
*February 24, 2015 by Dan*

**Physics**

A lighthouse beacon alerts ships to the danger of a rocky coastline. Part A According to the lighthouse keeper, with what speed does the light leave the lighthouse? v/c= A boat is approaching the coastline at speed 0.5. According to the captain, with what speed is the light ...
*December 2, 2012 by Amy*

**P.E check my answers**

1.Select the community activity that is a healthy choice to promote fitness for all ages A.annual 5K fun run for charity<--- B.annual state fair C.monthly movie in the park D.monthly laser light show at the planetarium 2.Mollie is well respected by her teammates even though...
*February 27, 2014 by Help!!*

**Math**

Use this equation to estimate typing speed, S=w/5-2e, where S is the accurate typing speed, w is the number of words typed in 5 minutes, and e is the number of errors. Choose the letter for the best answer. One of the qualifications for a job is a typing speed of at least 65 ...
*February 28, 2012 by Katie*

**Algebra**

If a plane can travel 500 miles per hour with the wind 400 miles per hour against the wind, find the speed of the plane without a wind and the speed of the wind? What is the speed of the plane in still air?
*March 24, 2012 by rangel*

**Science - Waves - Sci. Notation**

I know that the formula to calculate the speed of light is c=fλ. F is the frequency, c is the speed, and λ is the wavelength. So how do I calculate the wavelength of a purple light with a frequency of 750 * 10^12 HZ. Frequency is measured in HZ. The speed is measured...
*January 31, 2013 by Jamia*