Tuesday

October 6, 2015
Number of results: 32,732

**physics**

A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 85 J and its initial kinetic energy is 83 J, what is its total energy, E? E: Correct: Your answer is correct. J B. If at a later point its potential energy is 131 J, ...
*October 5, 2014 by Anonymous*

**Mechanics**

A particle of mass 5 kg is acted upon by a horizontal force of magnitude 16 N for 8 seconds, in which time it moves from rest until it is traveling with a speed v m/s. The particle continues to move with this speed for the next 15 seconds. it is brought to rest by the ...
*October 19, 2011 by Joshua*

**Physics**

A particle of mass 5 kg is acted upon by a horizontal force of magnitude 16 N for 8 seconds, in which time it moves from rest until it is traveling with a speed v m/s. The particle continues to move with this speed for the next 15 seconds. it is brought to rest by the ...
*October 19, 2011 by Joshua*

**Chemistry**

What is the ratio of the speed of methane gas to the speed of sulfur dioxide gas if both gases ate at the same pressure and temperature?
*February 18, 2010 by Sarah *

**math**

the speed of the current in Puget Sound is 5 mph. A barge travels with the current 26 miles and returns in 10 and 2/3 hours. what is its speed in still water?
*November 3, 2010 by haley*

**physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water?
*February 10, 2011 by tish*

**physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water
*February 23, 2011 by tish*

**physics**

Catching a wave, a 77-kg surfer starts with a speed of 1.1 m/s, drops through a height of 1.60 m, and ends with a speed of 8.5 m/s. How much nonconservative work was done on the surfer?
*March 22, 2011 by John*

**Physics**

A train, initially stationary, has a constant acceleration of 0.5 m/s Squared. A) what is its speed of 15 s? B) What would be the total time it would take to reach a speed of 25 m/s?
*June 14, 2011 by Ralph*

**College Math**

1. The posted speed limit on many US highways is 65 miles per hour. What is this speed in feet per second? 2. 3(3/4) yd is equal to how many inches?
*September 13, 2011 by Tonny*

**Physics**

Highway speed limit increased from 55 mi/h to 65 mi/h, how much time is saved on a 435 mile trip if you travel at the new speed limit?
*September 22, 2011 by JP*

**RMS Speed**

A gas is at 20°C. To what temperature must it be raised to triple the rms speed of its molecules? Ans: 2364oC I don't get how they got the answer. Please help!
*April 16, 2012 by Jenny*

**physics**

A certain car is capable of accelerating at a rate of 0.57 m/s^2.How long does it take for this car to go from a speed of 56 mi/h to a speed of 66 mi/h? 1mi/h = 0.447 m/s.Answer in units of s
*September 3, 2012 by selena*

**Math**

A boat travels 1 km upstream and 1 km back. The time for the round trip is 4 hours. The speed of the stream is 5 km/hr. What is the speed of the boat in still water?
*November 30, 2012 by Rilee*

**pre algebra**

it took us 3 hour to drive to a concert.on his way home he increased his speed by 19 miles got home in 2 hours . what was the speed
*September 16, 2015 by william*

**Pysics**

A caiman swims 185 meters at a speed of 6 m/s. It then enters a stream and slows to 2 m/s for 310 meters. What is the average speed of this cousin of the crocodile?
*September 14, 2013 by Carlos*

**Physical Science**

Suppose you are moving left (negative) with a velocity of -10 m/s? What happens to your speed if you have a negative acceleration? Do you speed up or slow down?
*October 12, 2013 by unknown*

**Physics**

2.0 kg rock in a 0.80 ling sting is swung vertically in circles. a) What does the speed of the rock to be so the string holds tight? b) what is the pulling force if the speed is 5.0 m/s?
*May 19, 2014 by Physics: Motion?*

**PHYSICS**

a flywheel makes300.rpm. find the angular speed of any point on the wheel and the linear speed(tangential) of a point 5.00m from the center.
*July 30, 2014 by EMMA*

**Physics**

A certain automobile engine delivers 2.24 ✕ 10^4 W (30.0 hp) to its wheels when moving at a constant speed of 31.0 m/s ( 69 mi/h). What is the resistive force acting on the automobile at that speed?
*September 29, 2014 by Mara*

**physics**

A 15 kg rock is horizontally from very high cliff at a speed of 65m/s. what is the speed of the rock after it has fallen a vertical distance of 35m?
*November 6, 2014 by Anonymous*

**math**

A girl walks 12 km at the speed of 3 km/h. what change should she make in her speed to take (i) an hour less and (ii) an hour more to cover the distance?
*December 18, 2014 by mukesh*

**speed time distance**

a train running at the speed of 180 km hr crosses a 365 meter long platform in 21sec. what is the length of the train
*June 8, 2015 by maths*

**Math :(**

jerome and tyler meet in the local pizza parlor after their saturday afternoon soccer game. Eash boy bought a separete pizza with an agreement to share with each other, both at the restraunt and in what they would each take home. jerome ate 1/4 of a pizza and Tyler at 2/3 of a...
*October 27, 2011 by Erin*

**Physics**

n early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the next slot in the wheel...
*July 27, 2010 by Mark*

**Intro to Physical Science**

A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?
*April 18, 2011 by Anonymous*

**Intro to Physical Science**

A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?
*April 18, 2011 by Anonymous*

**physics**

An electron in the cathode ray tube of a tele- vision set enters a region where it acceler- ates uniformly from a speed of 53800 m/s to a speed of 4.58 × 106 m/s in a distance of 2.82 cm. What is its acceleration? Answer in units of m/s2
*September 11, 2012 by John*

**physics**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.6 m/s in 4.0 s. Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed?
*September 20, 2013 by paul*

**physics**

An electron in the cathode ray tube of a tele- vision set enters a region where it acceler- ates uniformly from a speed of 30100 m/s to a speed of 3.82 × 106 m/s in a distance of 2.97 cm. What is its acceleration? Answer in units of m/s2
*September 28, 2014 by alex*

**Physics**

A projectile is fired straight up from the top of a 190m cliff with a speed of 170m/s . What will be its speed just before it strikes the ground below? (Use conservation of energy and neglect air resistance.)
*June 11, 2015 by Ali*

**physics - BOB**

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
*January 30, 2010 by Sarah*

**physic**

2. Rank the following in the order of how much of a corona discharge they would produce, from highest to least (e.g., if D is highest, then A, C, and B is lowest. enter DACB). Explain your response. a. a large round metal ball hooked to a high voltage battery b. a sharp metal ...
*January 21, 2011 by sabrina*

**science**

2. Rank the following in the order of how much of a corona discharge they would produce; from highest to least (e.g., if D is highest, then A, C, and B are lowest. entering DACB). Explain your response. a. a large round metal ball hooked to a high voltage battery b. a sharp ...
*June 22, 2011 by i*

**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 first car is 14 miles per hour faster than the speed of ...
*December 4, 2012 by val*

**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 first car is 14 miles per hour faster than the speed of ...
*December 5, 2012 by val*

**Math**

Ted and Ben took part in the same race. When Ted finnished the race in 25 min., Ben had only run 5/8 of the distance. Ben's average speed was 75m/min SLOWER than Ted's. What is Ted's average running speed? Speed=Ditance/time
*December 3, 2008 by Mary*

**Physics**

A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The elevator is at rest d.) ...
*December 11, 2012 by Maggie*

**chemistry**

Light travels at a speed of 3.00 * 10 to the power of 10 cm/sec. What is the speed of light in Kilometers per hour?
*April 27, 2008 by tina*

**Science**

A certain car is capable of accelerating at a rate of + 0.60 m/s^2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 60 mi/h?
*September 20, 2009 by Anh*

**Algebra 2**

A boat travels 60 km upstream and back again in 8 hours. If the speed of the boat is 16 km/h, what is the speed of the current?
*October 18, 2009 by Trisan*

**physics**

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?
*September 1, 2010 by Anonymous*

**physics**

A certain car is capable of accelerating at a rate of +0.50 m/s2. How long does it take for this car to go from a speed of 45 mi/h to a speed of 85 mi/h?
*September 14, 2010 by j*

**physics**

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 35 mi/h to a speed of 70 mi/h?
*September 15, 2010 by J*

**Physics **

A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 50 mi/h to a speed of 65 mi/h?
*September 17, 2010 by Raequel *

**physics**

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?
*September 21, 2010 by Bill*

**physics**

A certain car is capable of accelerating at a rate of 0.59 m/s2. How long does it take for this car to go from a speed of 27 mi/h to a speed of 33 mi/h?
*August 31, 2011 by Anonymous*

**Algebra I**

"A car is traveling at r speed. A plane is traveling at 5r speed. When will they both reach 200 miles?"
*May 23, 2011 by Beth*

**physics**

A certain car is capable of accelerating at a rate of + 0.30 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?
*September 9, 2011 by Savy *

**physics**

A freight train has a speed of 20.8 m/s at a given instant and 10.8 seconds later its speed is 17.1 m/s. What is the train's acceleration
*October 2, 2011 by haleigh *

**Computer help!!!**

Is 15.30 mbps good download speed? Also is 15 ms ping good and 0.40 mnps upload speed?
*December 9, 2011 by Zack*

**Science**

A 70kg person dives horizontally from a 200kg boat with a speed of 2 m/s. What is the recoil speed of the boat?
*February 11, 2012 by Jane*

**Phsyics **

A cannonball is fired into the air with a speed of 42 m/s from a height of 28 m, with what speed does the cannonball hit the ground?
*April 16, 2012 by Kelly *

**physics**

A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h?
*September 7, 2012 by Tamera*

**science**

A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s. If the cart has a beginning speed of 2.0 m/s, what is its speed?
*November 14, 2012 by aramon mo*

**calculus 2**

Can you give us an example of finding the speed from the velocity? Suppose your velocity was v(t) = 2ti - 3j. What would be the speed?
*August 27, 2013 by jones*

**science**

if a car can go from 0 to 60 mi/hr in 8 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr
*November 3, 2013 by Anonymous*

**math**

If you were moving at a speed of 0.00025 kilometers per hour, what is your speed in meters per minute?
*December 4, 2013 by Kate*

**chem/math**

A car traveling with a constant speed travels 150km in 7200s. What is the speed of the car?
*January 12, 2015 by candice*

**physics**

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first. The acceleration of gravity is 9.8 m/...
*February 3, 2011 by emily*

**Science**

1.A lift weighting 1000kg is moving upwards with an acceleration of 1m/s^2.The tension in the supporting cable is (a)980N (b)10800N (c)9800N (d)8800N 2.A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel.The starts moving upwards with ...
*July 30, 2015 by Diwije*

**physics**

The justice league is playing baseball with 5kg rockets. The flash's top speed is 300m/s and a home run requires a 180m run. The rockets accerlate at 1200m/s^2, Superman catches it 30m from home, and decelerates it with 2700N. Once he stops the rocket, he applies a 2700N force...
*March 30, 2012 by karly*

**physics**

1. What is a typical drift speed of electrons that make up a current in a typical DC circuit? (zero, less than 1 cm/s, about 10 m/s, or the speed of light) 2. What is the typical drift speed in a typical AC circuit? (zero, less than 1 cm/s, about 10 m/s, or the speed of light)
*July 16, 2010 by confused*

**Physics**

A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the speed of the car at ...
*November 14, 2007 by Tammy*

**Physics - Please Help**

An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of mass m1 = 2.80 kg ...
*February 27, 2011 by Em*

**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 spy’s boat, both boats reach the edge of a 5.2 m waterfall. The spy’s speed is 15 m/s and the officials’ speed is 25 m/s. How far ...
*November 1, 2011 by kelly*

**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 spy’s boat, both boats reach the edge of a 5.4 m waterfall. The spy’s speed is 14 m/s and the officials’ speed is 25 m/s. How far ...
*November 4, 2011 by Marie*

**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 spy’s boat, both boats reach the edge of a 4.6 m waterfall. The spy’s speed is 15 m/s and the officials’ speed is 24 m/s. How far ...
*November 21, 2011 by Caitlyn*

**math**

Stephen drove at a constant speed from Town X to Y at 9 A.M.yesterday. Half an hour later Cole drove from Town X to Y at A constant speed that was 30 km/h faster than Stephens. By 9:30 A.m, Stephanie had already traveled 40 km. Cole caught up with Stephen at Town , arriving at...
*October 22, 2013 by Jade*

**math**

Stephen drove at a constant speed from Town X to Y at 9 A.M.yesterday. Half an hour later Cole drove from Town X to Y at A constant speed that was 30 km/h faster than Stephens. By 9:30 A.m, Stephanie had already traveled 40 km. Cole caught up with Stephen at Town , arriving at...
*October 24, 2013 by rain*

**Physics**

A person reaches a maximum height of 65cm when jumping straight up from a crouched position. During the jump itself, the person's body from the knees up rises a distance of around 50cm . To keep the calculations simple and yet get a reasonable result, assume that the entire ...
*October 1, 2014 by Ash*

**Physics**

In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 43.8 m/s, to his enemy's car, which is going 55.8 m/s. The enemy's car is 15.2 m in front of the Indy's when he lets go of the grenade. A) If Indy throws the grenade so its ...
*August 9, 2011 by Kyle*

**criminal justice major**

I was expelled from college for having a argument with one of my teammates and went in her room with a bb gun in my pocket but never pulled it out on her the bb gun was for a soccer player and i gave it right back i to him. i was arrested the next day and taken to jail. my ...
*December 28, 2011 by terriyine *

**Chemistry**

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*

**Applied Calculus**

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height and initial velocity ...
*April 8, 2012 by Trisha*

**Applied Calculus**

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height and initial velocity ...
*April 8, 2012 by Trisha*

**Physics**

A wagon is coasting at a speed vA along a straight and level road. When twenty-five percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this mass is thrown is ...
*March 24, 2014 by Anonymous*

**dynamics**

a motorcycle traffic police starts from rest at point A two seconds after a car speeding at the constant rate of 120 km/h passes point A (where speed limit is 100 km/h only) if the policeman accelerates at the rate of 6 m/s^2 until he reaches the speed of 150 km/h and ...
*April 1, 2013 by mahdi*

**Physics**

A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.30 m/s on a horizontal frictionless surface. She throws a 22.5-g knife at the target with a speed of 39.5 m/s. The target is stopped by the impact and the knife passes through...
*March 4, 2014 by Timothy*

**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 = 17.0 kg and an initial velocity of VoA = 8.15 m/s, due east. Object B, however, has a mass ...
*March 5, 2015 by Jennifer*

**math**

a bootlenose dolphin jumps out of the water. the path the dolphin travels can be modeled by h=-0.2d^2+2d, where h represents the height of the dolphin in feet and d represents the horizontal distance. a) assume that all energy is conserved. what is the initial velocity with ...
*May 1, 2011 by bob HELP NEEDED HELP NEEDED HELP NEEDED*

**elementry math **

A box contains three black balls and two gold balls. A ball is selected at random, its color is recorded, and it is then replaced. A second ball is then selected at random and its color recorded. The outcome associated with this type of selection is an ordered pair (first draw...
*January 10, 2010 by katie *

**fizik**

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 the right at 7.00 ms"1. After the collision, the orange disk ...
*April 11, 2011 by alya*

**Math please help!**

the speed of the current in Puget Sound is 5 mph. A barge travels with the current 26 miles and returns in 10 and 2/3 hours. what is its speed in still water?
*November 3, 2010 by haley*

**college physics**

A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before striking the water?
*February 23, 2011 by jc*

**Physics**

A 91 kg man lying on a surface of negligible friction shoves a 75 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?
*February 26, 2011 by William*

**Geometry**

You are boating and heading directly west. The speed of the boat in still water is 36 mi/h. The river flows directly north at 15 mi/h. What is your resultant speed and directional?
*February 28, 2011 by James*

**Physics**

Is an airplane flying round trip at a constant speed an example of uniform circular motion or is a record player rotating at a record speed?
*June 29, 2011 by Jordan*

**trig**

a propeller turns at 300 rpm. Find the angular speed in rad/sec and the linear speed at the tip if the tip to the center is 30cm
*September 1, 2011 by b*

**physics**

A mass of 100g strikes the wall with speed 5m/s at an angle of 60 and rebounds with the same speed. If the contact time is 2*10^-3 sec., what is the force applied by the wall?
*August 7, 2012 by divanshu*

**physics**

A stunt driver starting from rest needs to achieve a speed of 26.2 m/s. If her vehicle accelerates at 8.3 m/s/s, what distance (in m) must she travel to achieve the desired speed?
*October 4, 2012 by Victoria*

**physics**

A 89.0 kg fullback running east with a speed of 5.00 m/s is tackled by a 97.0 kg opponent running north with a speed of 6.00 m/s. (a) Calculate the velocity of the players immediately after the tackle.
*October 21, 2012 by Anonymous*

**math**

nathan drove 262 miles in 5 hours at a canstant speed. how long would it take him to drive 377.28 miles at the same speed
*January 15, 2013 by Anonymous*

**trig**

An airplane has air speed of 540 mph and a heading of 50*. The wind is blowing from the north at 27 mph. Find the plane's ground speed and course direction.
*April 10, 2014 by Marlo*

**science/math**

If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? My answer was -10, is this correct. If not , I need help
*September 17, 2014 by douglas*

**Physics**

Starting from rest, a speedboat reaches a speed of 2.8 m/s in 2.7 s. What is the boat's speed after an additional 3.7 s has elapsed, assuming the boat's acceleration remains the same?
*October 8, 2014 by Paige*

**Physics grade 10**

john is walking at such speed so that his kinetic energy is 20 J, what is his speed? It started to rain John runs at a rate of 4.2 m/s find the change in KE.
*December 13, 2014 by Charlotte*

**grade 10 physics**

john is walking at such speed so that his kinetic energy is 20 J, what is his speed? It started to rain John runs at a rate of 4.2 m/s find the change in KE.
*December 13, 2014 by Anonymous*

**physics**

Toby is jogging at a constant speed of 3 m/s along a winding path. He is accelerating even though he is going at a constant speed. how is this possible? please help..
*February 17, 2015 by Aileen*

**Physics**

A pendulum consist of a particle P of mass m, attached to one end of a model string of length l=2.85m. The other end of the string is attached to a fixed point O and the particle moves in a vertical circle about the fixed point. The angle made by the string with the vertical ...
*April 27, 2012 by Anonymous*