Wednesday

August 5, 2015

August 5, 2015

Number of results: 32,084

**physics**

A roller-coaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? Incorrect: Your answer is incorrect. . kJ (b) ...
*September 28, 2013 by Tammy*

**Chemistry**

Currently studying for an lab exam. Just have a few question about a typical Iodine Clock reaction lab. In an typical Iodine Clock reaction lab what would be the state of effect of an increase in the initial concentration of persulfate ion (S2O3 2-) and the increase in the ...
*February 15, 2013 by AhmadM*

**Physics-Please check answer**

Damon helped me with this calc but I think the answer should be -20, not -22, could someone please check the calculation If a ball is thrown into the wall at 14 m/s and comes off at 6 m/s, what is change of velocity of the ball? I think it would be 14-6 = (-8 m/s) Is that ...
*January 5, 2011 by Russ*

**Physics**

A 3.0kg object originally at rest explodes and splits into three fragments. One fragment has a mass of .50kg and flies off along the negative x-axis at a speed of 2.8m/s, and another has a mass of 1.3kg and flies off along the negative y-axis at a speed of 1.5m/s. What are the...
*December 18, 2012 by Kellie*

**Physics**

As shown in the figure below, a bullet is fired at and passes a piece of target paper suspended by a massless string. The bullet has a mass of m, a speed v before the collision with the target, and a speed (0.466)v after passing through the target. The collision is inelastic ...
*November 2, 2014 by Ellen Q*

**Physics (simple electronics)**

The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 775 µF capacitor is 330 V. (a) Determine the energy that is used to produce the flash in this ...
*February 24, 2011 by Mike*

**maths**

A bag contains 4 red and 3 black balls. A second bag contains 2 red and 4 black balls. One bag is selected at random. From the selected bag, one ball is drawn. Find the probability that the drawn ball is red.
*February 5, 2013 by Anonymous*

**physics**

An egg is thrown nearly vertically upward from a point near the cornice of a tall building. It just misses the cornice on the way down and passes a point a distance 48.0 m below its starting point at a time 5.00s after it leaves the thrower's hand. Air resistance may be ...
*March 5, 2012 by aisha*

**math**

the chippa soccer association calculates its profit from gate taking match according to this formular p=5n-55 Where p is profit in rand an n is the number of people in the stadium a.calculate the profit when the number of people in the stadium is 250 b.if n=10,find p.explain ...
*October 24, 2010 by nathy*

**Physics**

A force of 165 N is needed to keep a small boat moving at 2.57 m/s. What is the power required to keep the boat moving at the steady speed? >> I understand that P=Fv but I don't understand the second question. If the resistive force of the water increases with the square...
*October 20, 2010 by Jordan*

**Physics**

A force of 165 N is needed to keep a small boat moving at 2.57 m/s. What is the power required to keep the boat moving at the steady speed? >> I understand that P=Fv but I don't understand the second question. If the resistive force of the water increases with the square...
*October 20, 2010 by Jordan*

**Physics**

In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 93.0 km/h, to his enemy's car, which is going 130km/h. The enemy's car is 17.0m in front of the Indy's when he lets go of the grenade. 1)If Indy throws the grenade so its initial ...
*February 24, 2011 by Anonymous*

**Physics**

In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 93.0 km/h, to his enemy's car, which is going 130km/h. The enemy's car is 17.0m in front of the Indy's when he lets go of the grenade. 1)If Indy throws the grenade so its initial ...
*February 24, 2011 by Anonymous*

**Algebra - Please HELP**

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 71 miles at a certain speed. The canoeist travels 5 miles on the second part of the trip at the speed 5mph slower. The total time for the trip is 4hrs. Waht was the speed on each part of the trip
*December 3, 2011 by lisa*

**physics**

An object with mass 110 kg moved in outer space. When it was at location < 11, -35, -7 > its speed was 17.5 m/s. A single constant force < 230, 420, -230 > N acted on the object while the object moved to location < 16, -41, -13 > m. What is the speed of the ...
*July 5, 2014 by samantha*

**physical**

What is the traverling ball in Hanbball
*October 9, 2011 by Anonymous*

**physics**

Two particles with masses m and 3m are moving toward each other along the x axis with the same initial speeds Vi. Particle m is traveling to the left, and the particle 3m is traveling to the right. They undergo an elastic glancing collision such that particles m is moving in ...
*May 20, 2012 by ace*

**AP PHYSICS**

The fast train known as teh TGV that runs south from Paris, France, has a scheduled average speed of 216 km/h. If the train goes around a curve at teha speed and the acceleration experienced by the passengers is to be limited to .07g, what is the smallest radius of curvature ...
*September 30, 2007 by Kristen*

**Math vocab**

What does distance/time/rate of speed mean?? Its all one word AND IM SOO CONFUSED! Movement? I am confused also. Rate of speed is not a common term. Speed is rate of motion , or rate of change of distance per time. i need help on my math vocab what is a sector What is the ...
*October 4, 2006 by Alexis*

**Language Arts Need Help!!**

Ok these are questions from my language arts book that I was assigned can you please check them i want to make sure they are correct so I now I'm making progress or not thx :-) Read the passage below, and answer the questions that follow. Let's Play! "How many of them do you ...
*December 17, 2012 by Gabby*

**broadcasting/english**

feedback is appreciated, thanks in advance THOUSANDS OF JOBLESS MICHIGANDERS WILL RECEIVE LESS MONEY IN THEIR WEEKLY EMERGENCY UNEMPLOYMENT CHECKS. MORE THAN 74 THOUSAND PEOPLE IN MICHIGAN RECEIVE BENEFITS THROUGH FEDERALLY FUNDED EMERGENCY UNEMPLOYMENT COMPENSATION PROGRAM (...
*March 14, 2013 by Blaze*

**math**

Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the firstvcar is 14 miles per hour faster than the speed of ...
*December 4, 2012 by val*

**chem**

how much water would you need to add to 20.0 mL of 2.0 M NaCl to make a 0.10 M solution? try the formula c1V1 = c2V2 (where c1 is the initial concentration, V1 is the initial volume, c2 is the diluted concentration and V2 is volume you are trying to find) when you have found ...
*May 22, 2007 by beckii*

**physics**

The first graph you plotted is called a speed-time graph. However, information other than speed or time can be obtained from such graphs. (a) What does the area under the line of the graph represent? the distance traveled? (b) Write an equation to represent the area under the ...
*October 21, 2007 by Anonymous*

**algebra**

a car goes at a constant speed for 120 kms, on the way back he goes at half the speed. he drives for a total of 4 hours and 30 minutes. what are the two speeds?
*October 6, 2009 by Kayley*

**Math**

You finish a two-mile walking race in 36.5 minutes. Write an inequality for the average speed of the walkers who finished after you did. (Average Speed = Distance/Time).
*November 4, 2009 by Maria*

**Physics **

A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?
*January 24, 2010 by Jeremy*

**Physics **

A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?
*January 24, 2010 by Jeremy*

**Pre Algebra**

A consultant traveled 9 hrs to a meeting. The return trip took only 8 hrs because the speed was 10 miles per hr faster. What was the consultants speed each way?
*March 13, 2010 by Susie*

**Math (urgent) hw due tommorow!**

The speed of a stream is 3 km/h. A boat travels 25 km upstream in the same time it takes to travel 35 km downstream. What is the speed of the boat in still water?
*August 30, 2010 by anj*

**word problem**

2. The excursion boat Holiday travels 35km upstream and then back again in 4h 48min. If the speed of the Holiday in still water is 15km/h, what is the speed of the current?
*October 8, 2010 by Jessica*

**Algebra**

Manuel has a boat that can move at a speed of 30 kn/h in still water. He rides 280 km downstream in a river in the same time it takes to ride 70 km upstream. What is the speed of the river?
*November 3, 2010 by Dusty*

**math**

The top speed of a cheetah is 71 miles per hour. Which of the following answers seems most reasonable for the distance a cheetah would cover in 25 minutes at this speed?
*April 10, 2011 by Mike*

**Physics**

Each tire on a car has a radius of 0.330 m and is rotating with an angular speed of 19.5 revolutions/s. Find the linear speed v of the car, assuming that the tires are not slipping against the ground.
*October 24, 2011 by Jasmin*

**Algebra II**

The heading of a plane is 27.7 degrees NE, and its air speed is 255 mi.h. If the wind is blowing from the south with a velocity of 42.0 mi/h, find the actual direction of travel of the plane, and its ground speed.
*November 2, 2011 by Arielle*

**Physic**

The moon orbits the earth a a speed of 1.02 Kilometers per second. Use dimensional analysis to convert this speed into miles per hour. is the answer .28 m/s????
*January 14, 2012 by Susie*

**physics**

An athlete spins in a circle before releasing a discus with a tangential speed of 9.0 m/s. If his angular speed at the moment of release was 12.0 rad/s, how far was the discus from his axis of rotation?
*March 19, 2012 by Anonymous*

**geometry**

A trailer driver left Miami at 15:45 and arrived at his destination 637.5 km away at 02:15 the next day. a. How long did the jpurney take? b. What was his average speed in km/h c. What was his average speed in ms^-1
*April 24, 2012 by jodi*

**Physics**

A car of mass 1,700 kg is initially traveling at a speed of 25 m/s. The driver then accelerates to a speed of 35 m/s over a distance of 500 m. Calculate the change in the kinetic energy of the car.
*July 11, 2012 by Sierra*

**Physics**

A car of mass 1,700 kg is initially traveling at a speed of 25 m/s. The driver then accelerates to a speed of 35 m/s over a distance of 500 m. Calculate the change in the kinetic energy of the car.
*July 11, 2012 by Sierra*

**tools**

What is the major difference between a high-speed and a high-torque drill? A. Chuck type B. Line cord gage C. Output speed D. Brush thickness
*August 24, 2012 by michael*

**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. (c) How far does the puck travel during the time interval?
*October 4, 2012 by Anonymous*

**physics**

An athlete executing a long jump leaves the ground at a 32.3 angle and travels 7.84 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be?
*January 28, 2013 by lee*

**Physics**

A hockey puck is hit on a frozen lake and starts moving with a speed of 12.2 m/s. Ex- actly 6.70 s later, its speed is 6.20 m/s. The acceleration of gravity is 9.81 m/s2 . a) What is its average acceleration? Answer in units of m/s2
*February 3, 2014 by Charlie*

**math**

It took Aaron 4 hours to drive 232 miles. Use the equation below to determine what his average rate of speed was. D = r x t D = distance, r = rate of speed, t = time
*May 1, 2014 by Anonymous*

**physics**

a man of 1kg is acted upon a single force Fvector=(4i+4j)N.Due to force, mass is (D,0) to(1m,1m).If initially the speed of the particle 2m/s.Its final speed showd approximately be ?
*August 31, 2014 by ashish *

**Physics**

A 1424-kg railroad car traveling at a speed of 11 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed (in m/s) afterward?
*October 31, 2014 by Ashely*

**Physical science **

A car accelerates at 1.6m.sec along a straight road for 10s then moves at a constant speed for 20s calculate speed after the first 10s
*November 15, 2014 by Jeniffer*

**math 0312**

The current in a stream moves at a speed of 9 mph. A boat travels 17 mi upstream and 17 mi downstream in a total time of 13 hrs. What is the speed of the boat in still water?
*May 4, 2015 by Sara *

**physics**

a bike is moving with a speed of 12m/s in west direction and rain is falling with a speed of 35m/s then at what angle an umbrella must be placed so that rain does not fall on person
*May 30, 2015 by Anonymous*

**Math**

A certain soccer team wins (W) with P(W)= 60%, loses(L) with P(L) = 30%, and ties (T) with P(T) = 10%. The team plays three games over the weekend. a.Determine the elements of the event A that the team wins at least twice and does not lose. b.Find P(A) c.Determine the elements...
*October 7, 2011 by Anonymous*

**College Chemistry 104**

A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration of Cu+2 has fallen to ...
*May 7, 2013 by Samm*

**Physics**

At time t = 0, you shoot a cannonball horizontally from the roof of a building at a velocity of 10 m/s. The building has a height of 80 m. Assume g = 10 m/s2 and that there is no air resistance. Write down the algebraic velocity equation for the y-direction of the ball with ...
*June 18, 2012 by Katie*

**Physics**

At time t = 0, you shoot a cannonball horizontally from the roof of a building at a velocity of 10 m/s. The building has a height of 80 m. Assume g = 10 m/s2 and that there is no air resistance. Write down the algebraic velocity equation for the y-direction of the ball with ...
*June 18, 2012 by Katie*

**PHYSICS**

last homework question I cannot figure out.... H E L P :} a bullet is fired at and passes a piece of target paper suspended by a massless string. The bullet has a mass of m, a speed v before the collision with the target, and a speed (0.466)v after passing through the target. ...
*November 2, 2014 by boyDoIneedHelp*

**chemistry**

1) The activation energy of a certain reaction is 35.3 kJ/mol. At 20 degrees C, the rate constant is 0.0130 s^-1. At what temperature would this reaction go twice as fast? Answer in units of degrees Celsius. i think the answer is around 34, but i keep in getting it screwed up...
*January 29, 2008 by Evets*

**English**

1. The game excited him. 2. He was excited at the game. 3. The soccor match interested Tom. 4. Tom was interested in the soccer match. 5. The news surprised him. 6. He was surprised at the news. (Is each pair correct? 1,3, and 5 are active voice sentences, and 2,4,and 6 are ...
*May 31, 2010 by rfvv*

**physic**

In order to qualify for the finals in an race, a runner must achieve an average speed of 5.24 m/s for the entire mile race. If she runs at a constant speed of 4.63 m/s for the first half of the 1609 meter race, what constant speed must she maintain for the second half of the ...
*August 21, 2012 by tyler*

**math**

The speed of a locomotive without any wagons attached to it is 40 kmph. It diminishes by a quantity which is proportional to the cube root of the number of wagons attached. if the speed of the locomotive is 34 kmph when 27 wagons are attached. what is the maximum number of ...
*December 23, 2014 by praneethi*

**Physics**

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.9 kg and an initial velocity of = 8.82 m/s, due east. Object B, however, has a mass of mB...
*November 4, 2012 by Tim*

**physics**

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B, however, has a mass of mB...
*October 10, 2013 by Ray*

**algebra**

A church group has a fund raiser in which they raise $2,040.00. If there were 69 more people then everyones donations would be $23.00 less. How many members were there originally and how much did they donate? let n be the number of folks let D be the donation per person n*D=...
*July 14, 2005 by tams*

**Physics**

A ski trail makes a vertical descent of 78.0 m (as shown in the figure below ). A novice skier, unable to control his speed, skis down this trail and is lucky enough not to hit any trees. If the skier is moving at 12.1 m/s at the bottom of the trail, calculate the total work ...
*March 8, 2010 by Sarah*

**chemistry**

a block of aluminum is placed in 10.0g of water. the initial temperature of the water is 22.0 degrees celcious and its final temperature is 27.0 degrees celcious. what is the amount of heat released by the block of aluminum in calories if it had an initial temperature of 48.0 ...
*April 30, 2013 by rachel*

**physics**

Compute your average velocity in the following two cases: (a) You walk 73.6 m at a speed of 1.79 m/s and then run 73.6 m at a speed of 4.31 m/s along a straight track. (b) You walk for 1.00 min at a speed of 1.79 m/s and then run for 1.30 min at 4.31 m/s along a straight track.
*September 9, 2012 by Corey*

**physics**

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 720 m apart, each engineer sees the other's train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is ...
*September 19, 2010 by Anonymous*

**physics spring**

A glider on an air track is connected by springs to either end of the track. Both springs have the same spring constant,k , and the glider has mass M. A)Determine the frequency of the oscillation, assuming no damping, if k= 125N/m and M= 250g. (I got the answer to be 5.03 hz) ...
*May 21, 2009 by annie*

**Physics**

Find the speed of light in flint glass if the index of refraction is n=1.66. How much slower in percent of speed of light in a vacuum c does the light move in each of this medium? v=c/n v=3x10^8m/s/1.66 =1.8x10^8m/s For the percent of speed of light in a vacuum c. Would it be...
*April 16, 2008 by Andrea*

**Help...More Math Help!!!...Please!**

A kayaker paddled 2 hours with a 6 mph current in a river. The return trip against the same current took 3 hours. Find the speed the kayaker would make in still water. The speed is 6 mph slower going upstream and 6 mph faster going downstream. Distance traveled = time x speed...
*November 16, 2006 by Jessica*

**College Physics**

In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 93.0 km/h, to his enemy's car, which is going 130km/h. The enemy's car is 17.0m in front of the Indy's when he lets go of the grenade. 1)If Indy throws the grenade so its initial ...
*February 24, 2011 by Anonymous*

**Physics**

Two main strategies are employed to deflect an asteroid: destruction or slowing it down by at least 425 s so that the earth can move out of the impact zone. Assume perfect inelastic collision. (a) If we know the speed of the asteroid (va), mass (ma), and the distance the ...
*October 22, 2013 by Milan*

**physics**

A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.540 m/s. The total mass of the sled, man, and rock is 93.5 kg. The mass of the rock is 0.300 kg and the man can throw it with a speed of 15.0 m/s. Both speeds are ...
*September 29, 2014 by mathew*

**Economics**

I have the following question in my assignment: The cost of producing stero systems has fallen over the past several decades. A:Use the supply-and-demand diagram to show the effects of fallaing production costs on the price and quantity of steros sold. B:In you diagram, show ...
*March 11, 2008 by G*

**physics**

An object moves with constant acceleration 3.65 m/s2 and over a time interval reaches a final velocity of 10.4 m/s. (a) If its initial velocity is 5.2 m/s, what is its displacement during the time interval? m (b) What is the distance it travels during this interval? m (c) If ...
*August 30, 2012 by roger*

**Physics,Question ,Solved but about Units?**

These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered travel ...
*October 10, 2012 by Katherine*

**earth-physics**

The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.07 1022 kg) hits the Earth while traveling at a speed of 1.30 103 m/s (assume the asteroid is a point mass compared to the radius of the Earth) in each of the ...
*February 26, 2012 by huiol*

**physics**

A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.8 m/s at ground level. Its engines then fire and it accelerates upward at 3.90 m/s2 until it reaches an altitude of 920 m. At that point its engines fail, and the rocket goes into ...
*October 8, 2009 by blair*

**College 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*

**chemistry**

Lab: Determining Ka of Acetic Acid Purpose: The purpose of this experiment is to determine the molar concentration of a sample of acetic acid and to calculate its Ka. Materials: phenolphthalein 125 mL Erlenmeyer flask 25 mL pipet and bulb pH metre acetic acid solution burette ...
*April 8, 2008 by Nick*

**Physics**

A projectile is fired from the origin with an initial velocity V₁=100m/s at an angle θ₁=30⁰. Another is fired from a point on the x-axis at a distance x₀=60m from the origin with initial velocity V₂=80m/s at an angle of θ₂. It is ...
*September 22, 2011 by Derek*

**Phisics (Urgent)!!!!!!!!!!!!!!!!!!!!!!**

A gunman standing on a sloping ground fires up the slope. The initial speed of the bullet is v0= 340 m/s. The slope has an angle α= 12 degrees from the horizontal, and the gun points at an angle θ from the horizontal. The gravitational acceleration is g=10 m/s2. (a) ...
*January 12, 2014 by Anonimus*

**Physics**

Exploration 3: A Moving Source at Different Velocities Procedure 1. Set Wave speed to 10.0 cm/s and Source frequency to 1.0 Hz. Place the detector anywhere. 2. Set Source speed to 6.0 cm/s. Select Go. Sketch the resulting wave-front pattern on a separate sheet of paper. 3. ...
*July 19, 2012 by Alfrieda*

**Physics Classical Mechanics Help ASAP**

A gunman standing on a sloping ground fires up the slope. The initial speed of the bullet is v0= 390 m/s. The slope has an angle α= 25 degrees from the horizontal, and the gun points at an angle θ from the horizontal. The gravitational acceleration is g=10 m/s2. (a) ...
*January 10, 2014 by Anonymous*

**math**

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 2, 2013 by arzam*

**maths**

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*

**Physics**

I HONESTLY KNOW THAT THIS SITE IS NOT INTENDED TO JUST GIVE ANSWERS, BUT I HAVE NO IDEA HOW TO DO THIS PROBLEM WHATSOEVER, SO PLEASE MAKE NO COMMNENTS LIKE "post some work" OR ANYTHING LIKE THAT...IF I HAD WORK TO POST....I WOULDN'T REALLY NEED HELP... :) Thanks. Firemen are ...
*September 17, 2006 by Josh*

**math/physics**

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?
*September 21, 2010 by cindy*

**Physics**

A sprinter can accelerate with constant acceleration for 2.70 s before reaching top speed. He can run the 100-meter dash in 10 s. What is his speed as he crosses the finish line? Please show me all the steps to solving this problem. Thanks
*October 5, 2011 by Beth*

**pre-calculus 11 **

The question is the roundtrip flight from Edmonton to Toronto covers a distance of 5400km in 7.6 hours. The speed from Edmonton to Toronto was 95 km/h faster than the speed from Toronto to Edmonton. What was the speed of the plane from Toronto to Edmonton? If i set up my ...
*June 16, 2015 by george *

**Physics**

A satellite with a mass of 284 kg approaches a large planet at a speed vi,1 = 14.4 km/s. The planet is moving at a speed vi,2 = 11.0 km/s in the opposite direction. The satellite partially orbits the planet and then moves away from the planet in a direction opposite to its ...
*June 6, 2012 by Eric*

**math**

what are some examples of a rate? speed of a car, how fast a cake bakes, how fast your sister grows, the speed of your grades going down if you start to not turn in homework.
*March 19, 2007 by remae*

**Physics**

The launching speed of a certain projectile is 6.4 times the speed it has at its maximum height. Calculate the elevation angle at launching. I have noo idea how to start this one. Please help!
*November 7, 2007 by Lindsay*

**physics-5**

A pilot begins a race at a speed of 755.0 km/h and accelerates at a constant uniform rate for 63.21 s. The pilot cross the finish line with a speed of 777.0 km/h. From this data, calculate the length of the course.
*September 16, 2009 by NoNo100*

**physics**

Snow is falling vertically at a constant speed of 6.6 m/s. At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight, level road with a speed of 66 km/h?
*September 16, 2009 by Nick*

**7th grade Science**

Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
*March 28, 2010 by me*

**math**

Jimmy is traveling at a speed of 135 miles per hour (mph). What is his speed in feet per second? Include units in the calculation to show the unit conversion.
*September 3, 2010 by Sam*

**physics**

An athlete executing a long jump leaves the ground at a 30.3 angle and travels 7.68 . What is the take off speed? If this speed were increased by just 3.0%, how much longer would the jump be?
*February 3, 2011 by Tia*

**science**

At the speed of 2.5 m/s, how many seconds will it take the kayak to run a 4,500 m course? What is the speed of the kayak inn kilometer per hour? I want to work it on my own, just need help with formula please thanks
*March 9, 2011 by Annie*

**math**

to save fuel on the 240 km trip to the cottage, the Nakamura family reduce their usual average speed by 20 km/h. this lengthens their journey by 1 hour. what is the slower average speed? pleassee help! thanks :)
*March 21, 2011 by dawn*