Friday

August 1, 2014

August 1, 2014

Number of results: 15,260

**physics**

The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I figured out the constant angular acceleration=1.71 rev/min2 but im not sure how to find:What ...
*September 27, 2010 by help*

**physics**

The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I found the constant angular acceleration as 1.71rev/min^2. They also ask you to find What is ...
*September 28, 2010 by help*

**physics**

The flywheel of a steam engine runs with a constant angular velocity of 220 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 2.7 h. (a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel ...
*March 5, 2008 by greg*

**PHYSICS!!!**

The flywheel of a steam engine runs with a constant angular velocity of 220 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 2.7 h. (a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel ...
*March 5, 2008 by greg*

**Physics**

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 120 kg and radius R = 80 cm. The engine rotates the wheel at 500 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the ...
*October 18, 2011 by Temi*

**Physics**

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 114 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the ...
*October 24, 2010 by Donny*

**Hard Physics Problem**

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 131 kgand radius R = 80 cm.The engine rotates the wheel at 580 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the ...
*October 25, 2010 by Donny*

**Physics**

The flywheel of a steam engine runs with a constant angular speed of 321 rev/min (in the counterclockwise direction). When steam is shut off, the friction of the bearings stops the wheel in 1.9 h. (a) What is the constant angular acceleration, in revolutions per minute-squared...
*July 27, 2010 by Anna*

**college physics**

The flywheel of a steam engine runs with a constant angular speed of 165 rev/min. When steam is shut off, the friction of the bearings and of the air brings the wheel to rest in 2.30 hrs (a) What is the constant angular acceleration of the wheel, in rev/min2 ? (b) How many ...
*June 8, 2010 by Bami*

**physics**

The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.1 h. At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the linear acceleration of...
*March 12, 2007 by winterWX*

**Physics **

The flywheel of a steam engine runs with a constant angular speed of 112 rev/ min . When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.2 h. What is the magnitude of the constant angular acceleration of the wheel in rev/min^2? Do not ...
*April 2, 2014 by Ted*

**physics**

The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I figured out the constant angular acceleration=1.71 rev/min2 but im not sure how to find:What ...
*September 28, 2010 by question*

**physics - drwls?**

The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.1 h. At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the linear acceleration of...
*March 13, 2007 by winterWX*

**physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.41 rad/s2. It accelerates for 25.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 65.5 s after it begins rotating.
*February 10, 2012 by qwertzuiop*

**Physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.39 rad/s^2. It accelerates for 30.3 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 69.1 s after it begins rotating.
*September 30, 2012 by Arthur*

**physics**

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.45 rad/s2. It accelerates for 29.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 63.7 s after it begins rotating.
*September 22, 2013 by Sue*

**Socials: invention**

what inventions came before the steam engine? (prototype) I have researched about the steam engine by James Watt and I know that before the steam engine there was a steam pump that was invented by Thomas Newcomen, but I need more info than this. Please help, thanks...
*February 15, 2013 by Tess*

**Physics**

In a city with an air-pollution problem, a bus has no combustion engine. It runs on energy drawn from a large, rapidly rotating flywheel under the floor of the bus. The flywheel is spun up to its maximum rotation rate of 5150 rev/min by an electric motor at the bus terminal. ...
*March 13, 2011 by Brent*

**kinetics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*March 8, 2012 by dmkp*

**kinetics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*March 16, 2012 by dmkp*

**kinetics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*March 28, 2012 by dmkp*

**kinetics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*March 30, 2012 by dmkp*

**kinematics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*May 30, 2012 by dmkp*

**engineering mechanics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*April 4, 2012 by dmkp*

**engineering mechanics**

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c) whilst...
*April 5, 2012 by dmkp*

**social studies**

What were the 5 scientific discoveries of the Industrial Revolution? I already hae the steam engine and a boat powered by the steam engine.
*September 28, 2009 by Anya*

**Social Studies quick question**

James Watt invented the steam engine in what year, and where? Are these right In the 1760s he invented the steam engine in Britain
*November 30, 2009 by Maria*

**physics**

Flywheels are large massive wheels (disks) used to store energy. They can be spun up slowly, and then the wheel’s energy can be released quickly to accomplish a task that demands high power. A large flywheel has a 2.4 m diameter and a mass of 300 kg. Its maximum angular ...
*December 11, 2011 by Anonymous*

**physics**

A steam engine’s boiler completely converts 151 kg of water to steam. This process in- volves the transfer of 4.8786 J J as heat. If steam escaping through a safety valve does 1.66 × 108 J of work expanding against the outside atmosphere, what is the net change in the internal...
*February 19, 2013 by scott*

**candle**

The flywheel of a prototype car engine is under test. The angular position θ of the flywheel is given by θ = (3.0rad/s3)t3 and the diameter of the flywheel is 36cm. (a)Find the distance that a particle on the rim moves during that time interval. (b) Find the angle &#...
*November 4, 2011 by ahmed*

**Math**

In first gear, or low gear, an automobile's engine runs about three times as fast as the drive shaft. In second gear, the engine does not have to run as fast; usually it runs about 1.6 times faster than the drive shaft. Finally, in third, or high gear, the engine runs at the ...
*June 17, 2013 by bob*

**Physics**

A steam engine's boiler completely converts 155 kg of water to steam. This process involves the transfer of 3.5 x 10^8 J by heat. If steam escaping a safety valve does 1.76 x 10^8 J of work against the outside atmosphere, what is the net internal energy of the water-steam ...
*March 26, 2008 by Lindsay*

**physics**

A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic energy stored in the ...
*March 17, 2010 by mike*

**Physics**

Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its maximum angular velocity is...
*July 23, 2011 by falcon306*

**physics**

A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find the kinetic energy ...
*November 30, 2012 by monic*

**physics**

A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find the kinetic energy ...
*December 2, 2012 by heather*

**physics**

hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a...
*November 22, 2009 by Chan*

**Socials**

With someone, I have to brainstorm the ways that the steam engine would change society. This is what I have so far: The steam engine would burn off water instead of anything toxic, it could be used usefully in factories by the factory workers-would help factory workers ...
*November 23, 2009 by Sara*

**physics**

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

**Physics***

A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 575 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 5,000 rev/min. (a) Find the kinetic energy ...
*October 20, 2011 by Allie*

**Physics Rotaional Kinetic Energy**

A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic energy stored in the ...
*March 17, 2010 by Anonymous*

**physics**

Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 120 ð rad/s. One such flywheel is a solid, uniform cylinder with a mass of 270 kg and a radius of 1.10 m. (a) What is the kinetic energy of the ...
*February 24, 2011 by jr*

**Physics**

A flywheel accelerates from rest to an angular velocity of 10.44rad/s at an angular acceleration of 51.57rad/s^2. The diameter of the flywheel is 1.16m. At this instant, calculate the resultant linear acceleration, in m/s^2, of a point on the circumference of the flywheel.
*April 18, 2012 by Anonymous*

**physics**

A flywheel with an axle 1.0cm in diameter is mounted in frictionless bearings and set in motion by applying a steady tension of 2N to a thin thread wound tightly round the axle. The moment of inertia of the system about its axis of rotation is 5.0 x 10^-4 kgm^-2. Calculate (a...
*March 26, 2010 by Edwin*

**Physics**

A flywheel with a diameter of 2.45 m is rotating at an angular speed of 74.1 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions...
*November 9, 2011 by kyle*

**English**

I left out the following sentences. Thank you very much. 1) His dictionary definition of a horse underlines how Mr. Gradgrind has choked his Bitzer's imagination. 2) The black of the soot (can soot be replaced by ash and smoke?). 3) Dickens compares the up-and-down movement of...
*March 28, 2012 by Matthew*

**physic**

In an experiment, a mass m = 40 gm, attached to a string wrapped around the axle of a flywheel and starting from rest, falls through a distance of 147 cm in 3.5 seconds. The diameter of the axle of the flywheel is 12 cm What is the acceleration of the mass and the angular ...
*March 22, 2012 by ashley*

**world history**

who evented the fist steam engine http://en.wikipedia.org/wiki/Steam_engine http://campus.udayton.edu/~hume/Steam/steam.htm The quantity 5.85 x 10^4m is equivalent to..... a.5850 000m b.5840m c.58500m d.0.000585m
*October 19, 2006 by kiera791*

**physics......PLEASE HELP!!**

A steam engine absorbs 1.98*10^5 J and expels 1.49*10^5 J in each cycle. Assume that all of the remaining energy is used to do work. a. What is the engine's efficiency? b. How much work is done in each cycle? If a gasoline engine has an efficiency of 21 percent and loses 780 J...
*February 14, 2007 by anonymous*

**physics**

You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 97-kg cylinder of radius R that has a maximum angular speed of 330 rev/s. The flywheel must deliver an average of 1.70 MJ of energy for each kilometer of distance. Find the smallest ...
*November 7, 2012 by Jack*

**auesdun**

what does steam engine mean
*December 15, 2009 by michael*

**physics**

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0) Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground, (a) what is the moment of inertia ...
*March 7, 2013 by Sam*

**Physics**

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0)Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground: (a) what is the moment of inertia of...
*March 7, 2013 by Sam*

**physics**

To drive a typical car at 40 mph on a level road for one hour requires about 3.2 × 10^7 J of energy. Suppose one tried to store this much energy in a spinning solid cylindrical flywheel which was then coupled to the wheels of the car. A large flywheel cannot be spun too fast ...
*November 16, 2012 by terry*

**physics**

An engine moves a boat through the water at a constant speed of 16 m/s. The engine must exert a force of 7.0 103 N to balance the force that water exerts against the hull. What power does the engine develop? answer:___ kW
*April 26, 2011 by Merlin*

**physics**

How long does it take a 20 kW steam engine to do 7.3×10^7 J of work?
*January 3, 2012 by Olivia*

**Physics**

How long does it take a 23 kW steam engine to do 8.8 x 10^7 J of work?
*January 4, 2012 by Zac*

**s.s**

How did the steam engine have an impact on the society?? http://www.google.com/search?as_q=history&hl=en&num=10&btnG=Google+Search&as_epq=steam+engine+&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&as_sitesearch=&as_rights=&safe=images
*May 23, 2007 by Parth*

**Chem 2**

A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.00 gallons, what is the boiling point of the solution? Make the following assumptions in your calculation; at normal filling ...
*July 14, 2012 by Paulie*

**chemistry**

A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.20 gallons, what is the boiling point of the solution? Make the following assumptions in your calculation; at normal filling ...
*March 2, 2013 by Morgan Parker*

**Physics**

A steam engine goes through the following 3 step process. I) Isobaric compression from a volume of 100 L to 10 L at a pressure of 4 x 105 Pa II) Isovolumetric process from a pressure of 4 x 105 Pa to a pressure of 4 x 106 Pa at a volume of 10L. III) An isothermal expansion ...
*December 11, 2006 by Eric*

**physic**

hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a...
*November 22, 2009 by Chan*

**Thermodynamic**

One Kg steam with a quality of 0.2 is heated in a piston / cylinder vessel at a constant pressure of 200 KPa unit the temperature reaches 400 degree C. calculate the work done by the steam.
*January 10, 2011 by chris*

**Physics**

FIGURE: h t t p : / / g o o . g l / a 7 j C F The figure is a PV diagram for a reversible heat engine in which 1.0 mol of argon, a nearly ideal monatomic gas, is initially at STP (point a). Points b and c are on an isotherm at T = 423 K. Process ab is at constant volume, ...
*December 1, 2010 by Elgoog*

**Physics**

FIGURE: h t t p : / / g o o . g l / a 7 j C F The figure is a PV diagram for a reversible heat engine in which 1.0 mol of argon, a nearly ideal monatomic gas, is initially at STP (point a). Points b and c are on an isotherm at T = 423 K. Process ab is at constant volume, ...
*December 1, 2010 by Schnitzel*

**physics**

how long does it take a 19kW steam engine to do 6.8x10^7 J of work?
*February 28, 2010 by yo*

**physics**

How long does it take a 25 kW steam engine to do 5.6 × 10^7J of work? Answer in units of s
*January 5, 2012 by stacy*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?
*December 12, 2012 by Natasha*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?
*December 12, 2012 by Natasha*

**Physics**

What is the maximum theoretical efficiency of a steam engine operating between 60°C and 410°C?
*June 27, 2012 by Tom*

**physics**

Two steam locomotives are approaching each other, each at 30 mi/hr, heading for a sure head-on collision. A rhinoceros beetle, who flies with a constant speed of 35 mi/hr, leaves the front of the first locomotive when the engines are just 2.000 miles apart, and flies to the ...
*October 25, 2012 by Anonymous*

**Desperate need of Help for Physics.**

Moment of inertia of a flywheel disk question: Do you think the calculated moment of inertia is larger or smaller than the "true" moment of inertial of the actual disk? question: calculate the percent difference between the static and the dynamic moment. I got .0195kgm^2 for ...
*November 15, 2006 by Teesha*

**Physics**

The pistons in an internal combustion engine undergo a motion that is approximately simple harmonic. If the amplitude of motion is 3.8cm , and the engine runs at 1500rpm , find the maximum acceleration of the pistons. Find their maximum speed.
*December 1, 2010 by Phy help!*

**Physics**

A cheetah is hunting. Its prey runs for 2.56 s at a constant velocity of +10.02 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?
*October 5, 2010 by Britt*

**physics**

A cheetah is hunting. Its prey runs for 3.21 s at a constant velocity of +8.36 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?
*October 8, 2010 by Jason*

**Physics**

A cheetah is hunting. Its prey runs for 3.07 s at a constant velocity of +11.32 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?
*January 25, 2011 by neil*

**physics**

A cheetah is hunting. Its prey runs for 4.3 s at a constant velocity of +8.4 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?
*February 7, 2011 by shaknocka*

**physics**

A cheetah is hunting. Its prey runs for 2.9 s at a constant velocity of +9.9 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?
*August 31, 2011 by salik*

**Physics **

A Carnot engine uses a steam boiler at 100°C as the high-temperature reservoir. The low-temperature reservoir is the outside environment at 16.5°C. Energy is exhausted to the low-temperature reservoir at a rate of 185 W. (c) How much steam will it cause to condense in the high...
*October 12, 2011 by Veronica *

**physics**

The flywheel of a motor is connected to the flywheel of an electric generator by a drive belt. The flywheels are of equal size each of radius . While the flywheels are rotating the tension in the upper and lower portions of the drive belt are and respectively. The drive belt ...
*December 5, 2013 by Greco*

**Chemistry**

A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.90 gallons, what is the boiling point of the solution? Make the following assumptions in your calculation; at normal filling ...
*February 21, 2012 by Heather*

**English**

Thank you very much for your corrections. I still have a few alternatives for you to check. 1) The demand for new clothes created the necessity (better: caused the development of new machinery?) to invent machinery for cloth-making. 2) New factories were built (sprang up is ...
*November 26, 2010 by Franco*

**physics**

an engine block of mass 275kg rest on a plane which is inclined at 13 degrees to the horizontal.if the plane can be tilted to a maximum angle of 21 degrees before the engine block slide due to its weight.calculate the minimum force parallel to the plane required to move the ...
*October 6, 2010 by charles*

**Physics**

How long does it take a 19 kW steam engine to do 6.8x10^7 of work? I have no idea how to solve this... Would someone please help?
*January 29, 2008 by Cassidy*

**thermodyn. please check work**

What is the sign of heat(Q), Work(W), or Temperature for these following situations. Say if it's +,-, or 0. 1)You hit a nail with a hammer: +W, Q=0, T=0 2)You hold a nail over a Bunsen burner: Q=+Q, Temp:constant, W=0 3)You compress the air in a bicycle pump by pushing down on...
*August 15, 2009 by Anonymous*

**Thermodynamics**

a rigid vessel of volume 1m(^3) contains steam at 20bar and 400 degrees Celcius. The vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel, the final pressure of the steam and the heat rejected during the process. The answers should ...
*March 12, 2010 by Claire*

**physics**

A car has a flywheel ( a diks of R=0.2m and uniformly distributed mass M=100kg) that can convert 25% of the rotational kinetic energy into translational kinetic energy. The mass of the car is 1000kg ( including flywheel). Suppose the car is at rest, and the flywheel has a ...
*December 30, 2013 by Al*

**Physics**

A car engine is initially rotating at 180 rad/s. It is then turned off and takes 1.20 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.
*May 30, 2012 by Alex*

**U.S. History**

Which invention was the basis for the major developments in American transportation? a.steam engine ** b.wagon axle c.canal lock d. gold spike
*February 17, 2014 by Anonymous*

**physic**

hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a...
*November 23, 2009 by Chan*

**Mathamatics**

Choose the two true statements from the following. Options A) If the rate of inflation as measured by the RPI is 2%, then a pension index linked to the RPI will increase by 2%. B) A price ratio of 0.8 corresponds to a price decrease of 80%. C) If the price of transport rises ...
*June 4, 2010 by S Rey*

**physics**

In the design of a passenger bus, it is proposed to derive the motive power from the energy stored in a flywheel. The flywheel, which has a moment of inertia of 4.0 x 10^2 kgm^2, is accelerated to its maximum rate of rotation 3.0 x 10^3 revolutions per minute by electric ...
*March 27, 2010 by Edwin*

**Mechanics M1**

A rabbit runs in a horizontal straight line ABC across a field (a)the rabbit runs from rest at A with a constant acceleration of 0.8 m/s^2 and reaches B after 3 seconds, find its speed at B
*March 7, 2012 by ahmad*

**Physics**

In the design of a passenger bus, it is proposed to derive the motive power from the energy stored in a flywheel. The flywheel, which has a moment of inertia of 4.0 x 102 kgm2, is accelerated to its maximum rate of rotation of 3.0 x 103 revolutions per minute by electric ...
*April 2, 2011 by Vertrex*

**Socials-Ms. Sue**

The steam engine changed society by the ingenious application of its power to kinds of work that formerly taxed the physical energies of the human race.
*November 23, 2009 by Sara*

**Physics**

Which of these types of motors or engines are heat engines? a. an automobile engine b. an electric motor c. a steam turbine
*December 28, 2010 by Sylvia*

**Physics**

Which of these types of motors or engines are heat engines? a. an automobile engine b. an electric motor c. a steam turbine
*January 2, 2011 by Anonymous*

**Physics**

1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank you.
*July 13, 2013 by Danny*

**Thermodynamics**

1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank you.
*July 13, 2013 by Danny*

**Thermodynamics**

A combined seperating and throttling calorimeter was used to determined the dryness fraction of steam flowing through a steam main at a pressure of 900kPa. The pressure and temperature after throttling were 100kPa and 110C respectively. The mass of water collected in the ...
*December 7, 2010 by Kay*

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