Thursday
August 21, 2014

Search: Chemistry (Internal Energy)

Number of results: 54,256

Chemistry - Science (Dr. Bob222)
Nitrogen gas has values of Cv and Cp of 20.8 and 29.1 J K-1 mol-1, respectively. When a certain amount of nitrogen is heated at constant pressure, what fraction of the heat Q is used to increase the internal energy of the gas, and how is the remaining energy used? A) 3/2 of Q ...
May 8, 2014 by Ana

Chemistry
What is the different b/n internal energy(^E) and enthalpy(^H)? Under what circumstances are internal energy and enthalpy nearly equal?
January 11, 2012 by Ethio

Physics
The amount of internal energy needed to raise the temperature of 0.26 kg of water by 0.3C is 326.5 J. How fast must a 0.26 kg baseball travel in order for its kinetic energy to equal this internal energy? Answer in units of m/s
March 14, 2013 by Ted

Physics
If a total mass of 11.1 kg falls 5.23 m and all of the mechanical energy is converted to internal energy, by how much will the internal energy of the water increase? The acceleration of gravity is 9.81 m/s 2 . Assume no energy is transferred as heat out of the vessel to the ...
February 12, 2012 by Joe

Physics(Please respond)
A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. U = Q - W Where U is the change in the internal energy of the system, Q is the heat/energy gained from ...
June 22, 2012 by Hannah

Chemistry (Internal Energy)
5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1, where the specific internal energy U(1) is = 2710 [kJ/kg] to state 2, where U(2) = 2660 [kJ/kg]. During the process, there is heat transfer to the steam with a magnitude of 80 [kJ]. ...
October 2, 2012 by Simon

physics
a worker drives a .551 kg spike into a rail tie with a 2.55 kg sledgehammer. The hammer hits the spke with a speed of 62.1 m/s. if one fourth of the hammers kinetic energy is converted to the internal energy of the hammer and soike, how much does the total internal energy ...
February 7, 2011 by Emily

(2-8) Chemistry - Science (Dr. Bob222)
Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal gas expands against a constant external pressure...
May 11, 2014 by Ana

Physics
Question: The amount of internal energy needed to raise the temperature of .25 kg of water by 0.2 degrees Celsius is 209.3 J. How fast must a 0.25 kg baseball travel in order for its kinetic energy to equal this internal energy? KE = (.5)(m)(v^2) 209.3 J = (.5)(.25kg)(v^2) ...
February 15, 2010 by mike

Physics
A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's initial internal energy. ...
December 4, 2012 by Casey

Chemistry
When 0.312g of glucose was burned in a bomb calorimeter (heat capacity 641 J/K) the temperature rose by 7.739 K. Calculate the standard enthalpy of combustion and the standard internal energy of combustion. I've calculated the standard enthalpy but am unsure of how to go about...
September 25, 2012 by Kalli

Physics(Please respond)
A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. Physics(Please respond) - Elena, Thursday, June 21, 2012 at 2:33am U = Q - W Where U is the change in the...
June 21, 2012 by Hannah

Chemistry
A system initially has an internal energy U of 493 J. It undergoes a process during which it releases 107 J of heat energy to the surroundings, and does work of 225 J. What is the final energy of the system, in J?
May 5, 2014 by Chris

physics
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 5.60 105 m3, and the pressure of the air in it is 8.40 106 Pa. Assume that air is a diatomic ideal gas whose internal energy U is given by U = 5/2 nRT. If one home...
April 26, 2008 by Karen

Physics
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 5.60 105 m3, and the pressure of the air in it is 8.40 106 Pa. Assume that air is a diatomic ideal gas whose internal energy U is given by U = 5/2 nRT. If one home...
April 27, 2008 by Janaih

Chemistry
If 244 KJ heat is released and 35 KJ WORK done on the system.calculte (a)change internal energy and change in enthalpy of system? (b) change in internal energy and change in enthalpy of the suround ?
January 17, 2012 by Chemo

Physics
A worker drives a 0.509 kg spike into a rail tie with a 2.08 kg sledgehammer. The hammer hits the spike with a speed of 63.3 m/s. If one fifth of the hammers kinetic energy is converted to the internal energy of the hammer and spike, how much does the total internal ...
February 1, 2012 by Angel

Chemistry
What is the different b/n change in internal energy(^E) and enthalpy change(^H) ? Under what circumstances are change of internal energy(^E) and enthalpy change(^H)?
January 11, 2012 by Chemo

physics help!!
A body at given uniform temperature of 300K and internal energy 8x10^6 J is split in two equal halves: a)Has any heat been exchanged b)What is the temperature of each half? c)What is internal energy of each half? K=Kelvin
November 17, 2010 by carla

physics
A 200 gram ball gets dropped from a roof at 15 meters high. A boy on the ground catches it. If 10 percent is translated to internal energy, then what was the increase of internal energy? Is it safe to be playing ball from the roof top?
February 26, 2013 by Anonymous

physical chemistry
A sample of the sugar D-ribose (C5H10O5) of mass 0.727g was placed in a constant volume calorimeter and then ignited in the prescence of excess oxygen. The temperature rose by 0.910K In a separate experiment in the same calorimeter, the combustion of 0.825g of benzoic acid for...
February 23, 2012 by nicole

Integrated Physics and Chemistry
The internal energy of a material is determined by.. A)its temperature B)the kinetic energy of its molecules C)the potential energy of its molecules D)the combined amount of kinetic and potential energy of its molecules
April 19, 2011 by Ashley

Physics
The internal energy of a gas is 585 J. The gas is compressed adiabatically, and its volume decreases by 137 cm3. If the pressure applied on the gas during compression is 2.65 atm, what is the internal energy of the gas after the adiabatic compression?
January 18, 2014 by Kimmy

Physics
The internal energy of a gas is 585 J. The gas is compressed adiabatically, and its volume decreases by 137 cm3. If the pressure applied on the gas during compression is 2.65 atm, what is the internal energy of the gas after the adiabatic compression?
January 25, 2014 by Kimmy

element of chemical engineering
the specific internal energy of a fluid is 200 cal/g .if the fluid leaves a system at a flow rate of 5 g/min ,at what rate does it transport internal energy out of the system?
July 3, 2013 by mousumi

chemistry
50J of energy is transferred as work is done on the system. 30J of heat is also absorbed by the system. Calculate the change in internal energy.
January 23, 2011 by jaycab

Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
January 13, 2013 by I'm going to die please help

physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1280 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied, how much can the ...
March 14, 2013 by Jayde Larson

Thermodynamic Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
January 13, 2013 by Kristal

Physics
A worker drives a 0.460 kg spike into a rail tie with a 2.16 kg sledgehammer. The hammer hits the spike with a speed of 64.5 m/s. If one third of the hammers kinetic en- ergy is converted to the internal energy of the hammer and spike, how much does the total internal energy ...
March 14, 2013 by Ted

Chemistry
A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25C. If it is placed in a freezer at -8C, what is the new value for its internal pressure What formula do I use for internal pressure?
November 1, 2012 by Kellina

Physics ~Thermodynamics~
* Pressure * 1) what other ways can the pressure of a gas be changed? * Internal Energy * 2) A cup of hot tea is poured from a teapot, and a swimming pool if filled with cold water. a) Which one has a higher internal energy? b) Which has a higher average of kinetic energy? * ...
March 5, 2013 by Isis

Physics Last Question HEEEELLLPPP !
#1 The internal energy of the gas in a gasoline engines cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The internal energy of the gas increases b. The volume of ...
December 12, 2010 by Jarrid

Chemistry
What is the change in internal energy of a system that does 7.02 kj of work and absorbs 888 j of heat?
October 26, 2013 by Grace Peterson

chemistry
What is the change in the internal energy of the system when 1.243 mol of NH 3(g) is formed from N 2(g) and H 2(g) at 25 degrees C and 1.0 atm?
March 30, 2014 by chemmom

Integrated Physics and Chemistry
Matching... Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or convection heating systems -a appliacne that controls the maintenance temperature of a heating system -an appliance ...
April 19, 2011 by Ashley

Chemistry
A gas sample absorbs 53KJ of heat and does 18 KJ of work. Calculate the change in its internal energy
August 14, 2012 by Gisselle

Physics
Heat energy is the energy associated with changes in internal energy. If no phase changes occur, the transfer of heat energy is accompanied by a change in?
June 8, 2011 by Billy

Chem
Part A : This is the first law of thermodynamics question. case 1 - the system expands and the surroundings get hotter case 2 - the system expands and the surroundgins get colder case 3 - the system contracts and the surroundings get hotter case 4 - the system contracts and ...
November 4, 2010 by AY

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 19, 2010 by Ashley

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 20, 2010 by Ashley

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 22, 2010 by Nevaeh

chemistry
Calculate the change in internal energy for a system that absorbs 242 J of heat and does 193 J of work on the surroundings...
October 24, 2010 by kellie

physics
A system does 196 J of work on its environment and gains 40 J of heat in the process. (a) What is the change in the internal energy of the system? J (b) What is the change in the internal energy of the environment? J I thought the answer would be +40 for the system and -40 for...
April 26, 2008 by Will

Physics
A jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off while walking. J
April 18, 2008 by Johnson

Chemistry
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the internal energy of the ...
October 13, 2011 by Sam

chemistry
by the way, how can you tell if work is 0 for 2 mol of solid iron (C = 25:1 J/(molK)) is heated from 20C to 200C. How much does its internal energy change?
March 11, 2010 by eng

College Chemistry
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the internal energy of the ...
October 31, 2011 by Amanda

Physics
Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5363 J and its pressure is 2.92 105 Pa. In the second step it is subjected to isobaric ...
March 24, 2014 by Mark

CHEMISTRY> HELP QUICK! pls
A system loses 14.2 kJ of heat while performing 7.2kJ of work on the surroundings. If the initial internal energy, E, is 77.6 kJ, what is the final value of E? 56.2 kJ 70.6 kJ 99.0 kJ 84.6 kJ
August 20, 2010 by Lucinda

Physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 16, 2012 by Erika

physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 18, 2012 by chelsea

chemistry
Internal energy is denoted by the letter U. true/false false
December 13, 2012 by Anonymous

chemistry
when a ball is dropped throuh a height, its potential energy changes. Suppose all this energy gets converted into internal energyof the ball once it has stopped bouncing and the specfic heat of the vall is 0.850 j/g-k(no heat loss to the environment). Calculate the height from...
September 17, 2012 by gary

Thermodynamics
In exercising, a weight lifter loses 0.100 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.30 x 10^5 J. (a) Assuming that the latent heat of vaporization of perspiration is 2....
April 16, 2007 by Louise

chemistry
In a certain process, the internal energy of a system increases 40.7 J and the quantity of work the system does on the surroundings is 78.9 J. What is q?
March 21, 2011 by Kamila

chemistry
A system performs 120J work with no heat supplied to it. Calculate the change in internal energy of the system.
January 23, 2011 by jaycab

physics 2
A system consists of 4.8 mol of an ideal monatomic gas at 375 K. (a) How much heat must be added to the system to double its internal energy at constant pressure? ? kJ (b) How much heat must be added to the system to double its internal energy at constant volume? ? kJ
December 15, 2008 by kelsey lauren

Chemistry
What is the change in internal energy of a system that releases 1275 J of heat to the surroundings and is compressed so that 235 J of work are done on the system?
March 11, 2011 by Katie

physics
The temperature of 7.10 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change Eint in internal energy of the gas, and (d) the change K in the average kinetic ...
April 8, 2009 by sweety

physics
The temperature of 7.10 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change Eint in internal energy of the gas, and (d) the change K in the average kinetic ...
April 8, 2009 by sweety

thermal physics
The temperature of 7.10 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change Eint in internal energy of the gas, and (d) the change K in the average kinetic ...
April 9, 2009 by chirayu

college chemistry
Use standard enthalpies of formation to determine Horxn for: 2NH3(g) + 3O2(g) + 2CH4(g) 2HCN(g) + 6H2O(g) in kilojoules. Find the change in internal energy for this reaction in kJ
October 18, 2010 by jake

Chemistry
Use standard enthalpies of formation to determine ΔHorxnfor: 3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) -133.5 = Delta H Find the change in internal energy for this reactioion.. ???? In KJ
February 27, 2014 by Steve

Chemistry
A pressurised can of whipped cream has an internal pressure of 1.33x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)?
April 28, 2010 by Alex

chemistry
A pressurised can of whipped cream has an internal pressure of 1.09x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)? explain to me! thanks
May 1, 2010 by write2khin

Chemistry
A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25C. If it is placed in a freezer at -8C, what is the new value for its internal pressure (in atmospheres)?
November 1, 2012 by Brandon

physics
A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by heat. What is the change in its internal energy?
November 29, 2012 by amela

chemistry
Gaseous hydrazine reacts with a gas X to form the gases nitrogen and HX by way of the following reaction: NH (g)+2X (g)=N (g)+4HX(g) The enthalpy change for Reaction 1 is −1180 kJ mol−1. Sketch or try and layout a fully labelled diagram showing how the internal ...
January 25, 2011 by James Holland

Physics HELP!!!!!!!!
In exercising, a weight lifter loses 0.100 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.30 x 10^5 J. (a) Assuming that the latent heat of vaporization of perspiration is 2....
April 18, 2007 by Mary

Chemistry
If the internal energy of a thermodynamic system is decreased by 300 J when 75 J of work is done on the system, how much heat was transferred, and in which direction, to or from the system?
November 2, 2008 by N/A

chemistry
An 80.0-gram sample of a gas was heated from 25 C to 225 C. During this process, 346 J of work was done by the system and its internal energy increased by 8905 J. What is the specific heat of the gas?
June 21, 2012 by cassie

PHYSICS NEED HELP FAST
A 150KG STEEL ROD IN A BUILDING UNDER CONSTRUCTION SUPPORTS A LOAD OF 6050KG. DURING THE DSY THE RODS TEMP. INCREASES FROM 22C TO 47C CAUSING THE ROD TO THERMAALLY EXPAND AND RAISE THE LOAD 5.5mm. FIND THE EGERHU TRANSFER AS HEAT TO OR FROM THE ROD. THE SPECIFIC HEAT CAPACITY ...
March 2, 2011 by ricki

physics
The temperature of 6.80 mol of an ideal monatomic gas is raised 12.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...
November 11, 2010 by san

physics
The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...
April 21, 2011 by tony

physics
The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...
April 21, 2011 by tony

physics
The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...
April 22, 2011 by niki

physics
The temperature of 2.10 mol of an ideal monatomic gas is raised 17.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in the average ...
April 23, 2012 by Anonymous

physics
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on the system. (a) For ...
April 26, 2008 by Will

Chemistry
A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25C. If it is placed in a freezer at -8C, what is the new value for its internal pressure (in atmospheres)? I did this but got a negative number that wasnt correct
November 1, 2012 by Brandon

chemistry
A sample of gas is compressed from 13.57 L to 3.93 L using a constant external pressure of 2.91 atm. At the same time, 1,759 J of heat flows into the surroundings. What is the internal energy change for the gas?
March 1, 2014 by abby

Chemistry
If a system has 2.50 102 kcal of work done to it, and releases 5.00 102 kJ of heat into its surroundings, what is the change in internal energy of the system?
November 11, 2011 by Harley

Physics
A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by heat. (a) What is the work done on the gas? (b) What is the change in its internal energy?
November 26, 2012 by Sam

chemistry
a gas sample heated in a cylinder uses 650kJ of heat. a piston that compresses this gas does 800kJ of work. What is the change in internal energy, ^E of the gas during this process?
February 12, 2013 by harry

physics
is it possible for the heat to flow even if the internal energies of the two objects are the same? explain. i said yes because the flow of heat depends on an object's temperature and two objects can have the same internal energy but different temperatures. is this right
April 21, 2008 by sake

science
Function/ Human Structure/ Plant Structure 1. Gas exchange 1. lungs 1.Stoma 2. Circulation 2. Blood vessels 2.Xylem 3. Water intake 3. mouth 3.Roots 4. Energy intake 4. mouth 4.Chloroplasts 5. Internal support 5. skeleton 5.Stem 6. Energy Storage 1. Fat cells 1. Vacuole 7. ...
June 4, 2014 by here is my chart Dr. Bob

chemistry
2 mol of solid iron (C = 25.1 J/(mol K)) is heated from 20C to 200C. How much does its internal energy change? U = q +W but no matter exchange so work is 0. then U=q=9036J But why is q not negative since isnt the system loses its heat to the surrounding
March 9, 2010 by eng

physics
please check: A battery converts what type of energy into electrical energy? a. mechanical b. nuclear c. solar d. chemical D When a parallel-plate capacitor is connected to a battery:a____ is stored on one plate, and a ___ is stored on the other a. negative charge, positive ...
March 14, 2009 by physics

chemistry
Calculate the change in internal energy of the system in a process for which 100J of heat is absorbed by the system from surroundings and does 85J of work. (I want to learn the solution on how to calculate it... pls. help thank you... )
January 23, 2011 by jaycab

Physics
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on the system. (a) For ...
April 27, 2008 by Sally

physics
A chemist is working with a 4.50 mol sample of an ideal gas. The internal energy of the sample is known to be 14,900 J. What is the average kinetic energy of each gas molecule?
March 14, 2014 by Anonymous

Physics
A car of mass 1.25 103 kg is initially moving on a level road at a speed of 17.0 m/s. Compute the increase in temperature of the brakes, assuming that all the mechanical energy ends up as internal energy in the brake system. Assume a total heat capacity of 10,000 J/C.
April 16, 2012 by Alex

Chemistry
1.) The average velocity of Cl(2) molecules is 2.50 x 10^3 m/sec at a temp of 25 C therefore the average velocity of helium atoms is ?? [ i got the answer 5.94 x 10^2 m/Sec is that right] 2.) A gas is allowed to expand from 1.5 : to 12.5 L against a constant pressure of 6.5 ...
March 29, 2009 by Emmanuel

chemistry
The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is 5084.3kJ. if the change is enthalpy is 5074.1kJ, how much work is done during the combustion?
February 20, 2011 by Anonymous

Chemistry
An 80.0 g sample of a gas was heated from 25 degree C to 225 degree C. During this process, 346 J of work was done by the system and its internal energy increased by 7495 J. What is the specific heat of the gas? J/(g∗C)
October 22, 2013 by Nate

physics/chemistry(Thermodynamics)!!!!!helppppp!
In a certain chemical process,a lab technician supplies 254 j of heat to a system. At the same time,73 j of work are done on the system by iys surroundings.What is the increase in the internal energy of the system?
May 15, 2013 by duke

chemistry
A system gives off 196 kJ of heat to the surroundings and the surroundings do 4.20 x 10 kJ of work on the system. What is the change in internal energy of the system?
February 8, 2011 by Anonymous

Program Planning
Please respond to the following questions either by writing the design name or by describing the design using standard notation (X= program, O=Observation, R=random assignment. For each design, please discuss all threats to internal validity. 1. Design: Single group post-test ...
April 26, 2009 by Anna

program planning
Please respond to the following questions either by writing the design name or by describing the design using standard notation (X= program, O=Observation, R=random assignment. For each design, please discuss all threats to internal validity. 1. Design: Single group post-test ...
October 26, 2013 by jessica

Program planning and evaluation
Please respond to the following questions either by writing the design name or by describing the design using standard notation (X = program, O=observation, R= random assignment). For each design, please discuss all threats to internal validity. 1. a. Design: Single group ...
May 1, 2011 by me

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