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July 24, 2014

Search: speed

Number of results: 19,419

Physics
Rubber Band A 156 g hockey puck is attached to a rubber band and rotated with an angular speed of 9.8 rad/s on frictionless horizontal ice. It takes a force of 1.12 N to stretch the rubber band by 1 cm. (a) If the original length L of the rubber band is 1 m, by how much (in m...
December 3, 2010 by Help

Physics
If you know the frequency of any form of electromagnetic radiation, you can determine its wavelength as for all electromagnetic radiation: Frequency is directly proportional to speed. Frequency is inversely proportional to wavelength. Wavelength is directly proportional to ...
October 23, 2012 by Fail

Physics! PLEASE HELP re Newton's Laws
What would you do given the following scenarios? 1. You are the capitan of a spacecraft traveling in the far reaches of outer space, a great distance from any other body. Unexpectedly your radar indicates a meteor on a collision course with your craft, necessitating a sudden ...
December 3, 2006 by Sophie

Physics
An artery branches into two smaller veins, identical arteries as shown in the diagram. The largest artery has a diameter of 10 mm. The two branches have the same diameter = 5 mm. The average speed of the blood in the main artery is given in the diagram. The blood has a density...
August 10, 2011 by Alex

Physics
An artery branches into two smaller veins, identical arteries as shown in the diagram. The largest artery has a diameter of 10 mm. The two branches have the same diameter = 5 mm. The average speed of the blood in the main artery is given in the diagram. The blood has a density...
August 10, 2011 by Alex

Physics
An astronaut is inside a rocket that is blasting off vertically from the launch pad. You want this rocket to reach the speed of sound (331 m/s) as quickly as possible, but you also do not want the astronaut to black out. Medical tests have shown that astronauts are in danger ...
February 22, 2012 by Jen

science
A bird sits on a pole and watches waves. The wave crests are 1.0 meter apart. If one wave crest passes the pole each second, what is the speed of the wave? . What is the period of the wave? . What is the frequency of the wave? . If the waves change so that the distance between...
February 6, 2011 by mary

science
Two stones are launched from the top of a tall building. One stone is thrown in a direction 30.0degree above the horizontal with a speed of 10.0m/s ; the other is thrown in a direction 30.0degree below the horizontal with the same speed. Which stone lands farther away from the...
September 8, 2008 by bob

Physics
A certain coiled wire with uneven windings has the property that to stretch it an amount s from its relaxed length requires a force that is given by , so its behavior is different from a normal spring. You suspend this device vertically, and its unstretched length is 19.0 cm. ...
February 25, 2011 by Martha

Physics .. help!!
Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates downward at 40 m/s2. What is the ...
February 6, 2007 by COFFEE

Physics
VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/m, and natural length l = 1.4 m is hanging vertically. This is shown in the left figure below where the spring is neither stretched nor compressed. In the central figure, a block of mass M = 2 kg is attached...
October 16, 2013 by Megan

Physics
A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.6 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.8 s before Kathy. If Stan moves with...
March 28, 2012 by Dave

Physics - Hellp Really Stuck!
1. A 0.20 kg object moves at a constant speed in a horizontal circular path of radius "r" while suspended from the top of a pole by a string of length 1.2 m. It makes an angle of 62 degrees with the horizontal. What is the speed of this object? 2. An object of mass 3 kg is ...
December 11, 2010 by Jennifer

Physics*
A student sits on a rotating stool holding two 3.2-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg m2 and is ...
October 20, 2011 by Allie

physics
A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. Before the second object reaches the ...
August 24, 2010 by jake

physics
A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
December 25, 2009 by Heart

physics
a quarterback throws a pass to a receiver. the release point for the football is 1.8 m above the ground. he projects the ball with a speed of 20 m/s at an angle of 40 above the horizontal. If the pass falls incomplete, how long is it in the air? If the pass falls incomplete, ...
September 20, 2011 by Madison

physics
I do not understand the answer that was given to me on a post dated Nov. 23. Please help explain my questions that appear at the end of this post. Bart ------------------- Posted by Bart on Wednesday, November 23, 2011 at 6:52am. A baseball is hit with a speed of 27 meters per...
December 4, 2011 by Bart

Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are ...
March 27, 2011 by Mary

Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are ...
March 27, 2011 by Mary

Physics
Physics Homework _____________________________________________________________ 1.) A particle at t 1 = -2.0 s is at x 1 = 3.4 cm and at t 2 = 4.5 s is at x2 = 8.5 cm. What is its average velocity? Can you calculate its average speed from this data? ...
July 20, 2008 by Ruby

Physics
You are conducting an experiment inside a train car that may move horizontally along rail tracks. A load is hung from the ceiling on a string. The load is not swinging, and the string is observed to make a constant angle of 45 degrees with the horizontal. No other forces are ...
October 23, 2009 by Anonymous

Physics
You are conducting an experiment inside a train car that may move horizontally along rail tracks. A load is hung from the ceiling on a string. The load is not swinging, and the string is observed to make a constant angle of 45 degrees with the horizontal. No other forces are ...
October 23, 2009 by Anonymous

physic
A police officer arrives at the scene of the collision of the two snowmobiles (Figure 1) to find both drivers unconscious. When the two vehicles collided, their skis became entangled and the two snowmobiles remained locked together as they skidded to a stop. One driver was ...
April 2, 2007 by sam

physics
A 250 g block is dropped onto a relaxed veritcal spring that has a spring constant of k=2.5 N/cm. The block becomes attached to the spring and compresses the spring 12 cm befor momentarily stopping. While the spring is being compressed, what work is done on the block by a) ...
December 18, 2006 by me

Physics
When baseball outfielders throw the ball, they usually allow it to take one bounce on the theory that the ball arrives sooner this way. Suppose that after the bounce the ball rebounds at the same angle theta as it had when released, but loses half its speed. Assuming the ball ...
October 2, 2007 by CONFUSED!!!!

please help me correct
i have to write a project about amy project. i'll write for what i am trying to say but i hope you can help me put it in a better, organized sentence. our project is about flying paper airplanes outdoors and it was windy and i want to explain why it's a disadvantage for some ...
May 24, 2007 by dave

physics
1.The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2. 2.An airplane taking off from a landing field has a run of 500 m. It starts from rest, moves with constant acceleration, and makes the run in 30 s. ...
October 9, 2010 by jazz

Physics
A 64.1-kg athlete leaps straight up into the air from a trampoline with an initial speed of 7.4 m/s. The goal of this problem is to find the maximum height she attains and her speed at half maximum height. Write the general equation for energy conservation and solve for the ...
November 21, 2011 by ann

AP Physics
You are the lead scientist for a criminal investigation unit. Your team has found what might be the gun that caused the murder.Unfortunately the bullet that identifies the gun can not be found,but there is enough evidence that if you can figure out the speed of the bullet at a...
October 25, 2006 by Keshia

Physics/Math
A certain string can withstand a maximum tension of 43 N without breaking. A child ties a 0.37 kg stone to one end and, holding the other end, whirls the stone in a vertical circle of radius 0.91 m, slowly increasing the speed until the string breaks. Where is the stone on its...
February 12, 2007 by COFFEE

active physics
from the question we just did, how much force is neede to stop in 20 seconds! OK. think it through. If it's going at 10 m/s, and then it stops, what is it's change in velocity? is it 10 Yes, now it takes 20 seconds, so what is its acceleration (actually deceleration)? can u ...
November 2, 2006 by alejandra

Literature
What words and comparisons emphasize Achilles' speed? (question from the iliad)
August 27, 2007 by sonia

Algebra
A train takes 40 min to travel 18 mi. What is the average speed? ___mph
September 24, 2007 by Bobby

Science
What is the Mass of a ten-speed bicycle? What is the volume of a punch bowl? Thank you!!
November 12, 2007 by Chaz

chemistry
If the molecular speed of a gas increases, its rate of diffusion will__________.
February 27, 2008 by matt

Science
Find the mass of a car that has the speed of 30m/s and a momentum of 45,000kg,m/s.
March 24, 2008 by Jennifer

science
at what speed did a plane fly if it traveled 1760 meters in 8 seconds
April 8, 2008 by jacob

SCIENCE
COULD ANY PART OF A SPEED LINE BECOME PERFECTLY VERTICAL ON A GRAPH?
May 12, 2008 by SADE BATES

Math~Algebra
11. A black racer snake travels 46.0 km in 20 hours. What is the speed in km/h?
May 25, 2008 by Sahara

driver's ed
what affects your perception and speed the most when driving. marjuina or narcotics.
June 5, 2008 by Miley

Science
How does the density and the elasticity of a medium affect the speed of a wave? PLEASE HELP!! :)
June 10, 2008 by Bob

Physics
What is the speed of an electromagnetic wave that has a frequency of 7.8 x 10^6 Hz? How would I solve this problem?
September 9, 2008 by Olivia

physics
An object is thrown vertically upward with a speed of 19.1 m/s. How high does it rise?
October 6, 2008 by Vishnu

science
a car and a truck are traveling at the same speed. Which has more momentum? why?
March 24, 2009 by lola

Physical Science
Is the speed of light directly proportional to the distance traveled?
May 12, 2009 by Kristie

physics
At what temperature do the molecules of nitrogen gas have an rms speed of 35 ?
November 22, 2009 by Anonymous

physics
A ball is thrown up with a speed of 30m/s, what is the maximum height reached?
January 20, 2010 by Andrew

Physics
How can i find the averagee veloity and speed for a postion time graph
February 9, 2010 by jake

math
How can i find the average Velocity and speed for a position time graph*
February 9, 2010 by jake

CHEMISTRY
TO WHAT SPEED MUST AN ELECTRON BE ACCELERATED FOR IT TO HAVE A WAVELENGTH OF 3.0CM?
February 10, 2010 by DIANA

physics
if velocity vector is changing but speed is constant, can there still be work
March 5, 2010 by eng

Physics
What is the kinetic energy of an automobile with a mass of 1250 kg traveling at a speed of 11 m/s?
April 14, 2010 by glenn

physics
what is the speed of light moving through a medium of index of refraction 2.45?
July 31, 2010 by Cristina

science
what units would you use to measure the speed of a car on the highway?
August 27, 2010 by kahy

Astronomy
Do people wear seatbelts to protect themselves from speed or acceleration?
September 14, 2010 by Dre

physics
An object is thrown vertically upward with a speed of 31.8 m/s. How high does it rise?
October 3, 2010 by Bala

physics
An object is thrown vertically upward with a speed of 22.4 m/s. How high does it rise?
October 7, 2010 by baj

physics
An object is thrown vertically upward with a speed of 22.4 m/s. How high does it rise?
October 7, 2010 by jake

Physics
How much work is required to stop an electron (m= 9.11 * 10^-31 kg) which is moving with a speed of 1.8010^6 m/s?
October 17, 2010 by Eden

math
what is the average speed if it takes 0.5 hours to jog 4,000 miles ?
October 19, 2010 by tedeja

chemistry
At what temperature does the rms speed of Cl2 molecules equal 401 m/s?
October 24, 2010 by caroline

physics (Science)
If a bee flew 27 centimeters in 10 seconds what would its speed be?
March 28, 2011 by Sara

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light
October 28, 2010 by Emily

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light
October 29, 2010 by Emily

physics
A car that decreases its speed from 100 km/h to 20 km/h undergoes ______ acceleration.
November 1, 2010 by Janis

Physics
How long would it take (in seconds) to travel 1 km at a speed of 100 km/h?
November 9, 2010 by Rose

Physics
Why does tension in a rope increase as the rotational speed of a ball increases?
November 24, 2010 by Alex

physical chemistry
What is a typical speed for a N2 molecule in this room? a) 50 m/s b) 500m/s c) 1500 m/s
January 16, 2011 by emoni

Kinematics
A car has an acceleration of 2 m/s2. What is its speed 3 seconds after it starts moving?
February 1, 2011 by Randy

business communication
Should you bribe a customs official to speed up delivery?
February 16, 2011 by joy

Physics
How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?
February 27, 2011 by Lesley

physics
what is the speed of light moving through a medium of index refraction 2.45?
April 27, 2011 by kay

chemistry
OF THE FOLLOWING SUBSTANCES, WHICH HAS THE LARGEST AVERAGE SPEED AT 25DEGREES. CO, NH3,H2,N2?
April 30, 2011 by Joe

Science
If a 500kg horse is moving at a speed of 15 mph what is its kinetic magnitude?
May 28, 2011 by Ian

physical science
What is the kinetic energy of a 27 kg dog that is running at a speed of 8.3 m/s (about 19 mi/h
May 31, 2011 by t

Science
What is the kinetic energy of a 28 kg dog that is running at a speed of 7.0 m\s(about 16mi\h)?
June 2, 2011 by Ann

physical science
whats the speed of sound in air at 30 degrees Celsius.
July 7, 2011 by Raja

math
how do you calculate the distance and speed of a motorcycle that is going to jump 4 cars
August 24, 2011 by linda

science
Does all object fall at the same speed given the mass
September 3, 2011 by gwen

physics
If a bug traveled a distance of 180 meters at a speed of 15 m/s, what was the time?
October 9, 2011 by Anonymous

Physics
The speed of an electron is known to be between 3.010^6 m/s and 3.310^6 m/s . Estimate the uncertainty in its position. Change in X = ? M
November 29, 2011 by Paige

physics
Find the speed of a sleigh sliding 326 feet in 22 seconds.
December 1, 2011 by kay

physics
If a person runs a marathon 26.4 miles in 2.5 hours, what is his/hers speed?
December 12, 2011 by Neh'Dya

physics
How can you explain the caculation of velocity or speed using distance and time?
December 12, 2011 by Neh'Dya

physics
what is the speed of a sound wave if its frequency s 160 hertz and its wavelength is 2.2m?
January 6, 2012 by aatqa

scientist
What is the kinestic energy of a bullet of 22kg fire from a gun with a speed of 6m`s
February 23, 2012 by Bright

Physical Science
What is the speed of a photon of red light, if its frequency is 4.3 x 1014 Hz?
March 2, 2012 by mel

science
on mars, the buggy travelled 24m in 16 secs calculate its speed
March 8, 2012 by jorden

physics
a student driving a car travels 10.0 km in 30,0 min.What was her average speed?
March 12, 2012 by tema

Phys
What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?
April 12, 2012 by Jason

Physics
What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654m?
April 12, 2012 by Alex

physics
Find the speed of sound (in m/s) at -35C at 1 atm pressure in dry air.
April 12, 2012 by anonymous

Physics
Find the speed of sound (in m/s) at -35C at 1 atm pressure in dry air.
April 13, 2012 by George

Physics
Find the speed of sound (in m/s) at -35C at 1 atm pressure in dry air.
April 13, 2012 by Anna

Physics
Is the speed of light constant as it passes through transparent materials?
April 19, 2012 by James Mesch

physics
A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
May 4, 2012 by Anonymous

physics
A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
May 4, 2012 by Anonymous

algebra
A black racer snake travels 29.9KM in 13 hours. What is the speed in KM/h?
June 1, 2012 by rr

physics
a sprinter runs 222yds in 25.2s find her average speed in yds/s
July 4, 2012 by lora

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