# A system has an initial energy of 117 joules. The energy equation includes --40.1 J of heat and -20.3 J of work. What is the final energy?

64,983 results
1. ## Chemistry

A system has an initial energy of 117 joules. The energy equation includes --40.1 J of heat and -20.3 J of work. What is the final energy? Was heat added to the system or to the environment? Was work done by the system or to the system? Be sure to show all

asked by Anonymous on May 3, 2017
2. ## physics

Two masses are connected by a light string passing over a frictionless pulley as shown on Figure. The M2= 6.1 kg mass is released from rest at height h = 2.8 m . We are given that M1=2.7 kg and I, the moment of inertia of the pulley is I = 0.198 kg m2 and

asked by Serena on November 4, 2014
3. ## Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

asked by Allison on July 8, 2011
4. ## Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

asked by Allison on July 8, 2011
5. ## physics

In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball

asked by juan on December 17, 2014
6. ## Physics 1 Collision Math

Mass A, 2.0kg , is moving with an initial velocity of 7 m/s in the +x-direction, and it collides with mass B,4.0kg , initially moving in the +x-direction. After the collision, the two objects stick together and move as one. What is the change in kinetic

asked by Anonymous on August 31, 2017
7. ## Chemistry

Suppose you use 135 calories of energy to perform a task, how many joules have you used? See, I don't want the answer, just the steps leading me up to the answer, like how to figure this problem out wiht out using a coverting system. Assuming you are using

asked by Buttercup on September 24, 2006
8. ## Physics

For non-ideal oscillators (such as a real pendulum) energy is lost and the amplitude (which is the maximum displacement) is no longer constant but also decreases with time. How fast the energy lost is described by a TIME CONSTANT, τ = m/b. Typically after

asked by Ike on February 1, 2014
9. ## Chemistry

How do you convert energy into to joules (can you please give me an example with showing me your i.e how you did it, in full detail) How do you find specific heat numbers? Your questions beg for amplification. Please expand. Energy is measured in joules

asked by Buddy oh Pal on September 24, 2006
10. ## Physics

Hello can someone please help me with this physics question and show the work so I can understand? A box at the top of a rough incline possesses 981 joules more gravitational potential energy than it does at the bottom. As the box slides to the bottom of

asked by Becky on February 10, 2016
11. ## Physics

Just before your mountain bike ride, you eat a 240 Calorie exercise bar. (You can find the conversion between food Calories and Joules in the People’s Physics chapter and several references online.) The carbon bonds in the food are broken down in your

asked by V on December 15, 2015
12. ## science

how should each form of energy be identified? A) energy A:gravitational energy /energy B:chemical energy B) energy A: nuclear energy/ energy B: electrical energy C) energy A: electromagnetic energy energy B:sound energy D) energy A: mechanical energy

asked by kakashi hatake please help on February 8, 2017
13. ## Physics

A system absorbs 1000 Joules of heat and delivers 600 Joules of work, while loosing 100 Joules of heat by conduction to the atmosphere, the change in the internal energy of the system will be. My solution. I used U=Q+A, and my answer was 1600, but its real

asked by Shahab Mirza on September 28, 2014
14. ## Physics

Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

asked by Leila on May 8, 2013
15. ## Physics

Can someone help me solve this? I've tried it a few times, but I keep getting answers that seem off. Like, for example, I'm getting 2.339 for part A, and it just seems completely off. So if you know the right formulas and can walk me through this, I'd

asked by James on April 27, 2015
16. ## physics

work & energy homework problems: please help me =] my teacher is bad a teaching how to do stuff =/ 1)A 5.000kg plastic ball moves with a velocity of 10.00 m/s x. It collides with a second plastic ball of mass of 10.00kg at rest. The collision is completely

asked by alissa on December 17, 2007
17. ## 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 ÄU = Q - W Where

asked by Hannah on June 22, 2012
18. ## Physics

Object A has mass mA = 9 kg and initial momentum A,i = < 19, -7, 0 > kg · m/s, just before it strikes object B, which has mass mB = 12 kg. Just before the collision object B has initial momentum B,i = < 5, 6, 0 > kg · m/s. Consider a system consisting of

asked by What does this even mean!? on November 22, 2010
19. ## Chemistry

For the following equation, write a thermochemical equation that includes an energy term within the equation: The formation of 1 mol of copper(II)chloride from its elements releases 220.1kJ of energy.

asked by Han on September 13, 2014
20. ## Physics

In a horizontal spring-mass configuration, the position of the 0.52 kg mass is described by [x = (1.09 m) sin(2.70t)] a) What is in meters the amplitude of these oscillations? b) What is in m/s the maximum speed of the mass under these conditions? c) What

asked by Serena on November 12, 2014
21. ## 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. ÄU = Q - W Where ÄU is the change in the internal energy of the system, Q is the

asked by Hannah on June 22, 2012
22. ## physics

During a rockslide, a 520kg rock slides from rest down a hillside that is 500m long and 300m high. The coefficient of kinetic energy between the rock and the hill surface is .25. a) If the GPE energy U of the rock –Earth system is zero at the bottom of

asked by Brian on January 11, 2007
23. ## Physics

A physics textbook is launched up a rough incline with a kinetic energy of 200 joules. When the book comes momentarily to rest near the top of the incline, it has only gained 180 joules of gravitational potential energy. About how much kinetic energy will

asked by Bob on May 10, 2012
24. ## 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

asked by Amanda on October 31, 2011
25. ## 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

asked by Sam on October 13, 2011
26. ## physics

Einstein saud that the amount of energy in matter is given by E=mC^2 where if m is in kilograms and c=3x10^8 which is the speed of light. The energy is E is given in Joules. Assuming that is takes an average of 1x10^11 Joules to heat your house during the

asked by sarah on February 22, 2012
27. ## Physics

A laser used to weld detached retinas emits light with a wavelength of 652 nm in pulses that are 20 ms in duration. THe average power expended during each pulse is .600 W. (a) How much energy is in each pulse, in joules and electron volts? (b) What is the

asked by J on April 28, 2008
28. ## Science

Please help me on my science homework....Motor A uses 1000 joules of energy to move 200 newtons of force a distance of 3 meters. Motor B uses 1200 joules of energy to do the same job. What is the difference in percent efficiency between Motor A and Motor

asked by Jenny on November 7, 2006
29. ## CHEMISTRY

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

asked by John on November 3, 2010
30. ## chem helpp!

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

asked by John on November 3, 2010
31. ## Chem

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

asked by John on November 3, 2010
32. ## chem please help drbob222

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules

asked by Morgan on November 26, 2014
33. ## Chemistry

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules

asked by Morgan on November 25, 2014
34. ## Chem please help

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules

asked by Morgan on November 26, 2014
35. ## Chem please help

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules

asked by Morgan on November 26, 2014
36. ## Chemistry

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules

asked by Cortey on November 26, 2014
37. ## chem please help

What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules Do not

asked by Morgan on November 26, 2014
38. ## chem

Ionization energy is defined as the minimum energy required to remove an electron from the ground state (n0) to infinity (n∞). Determine the wavelength of radiation required to ionize the hydrogen electron from the n = 2 energy level. Calculate the

asked by Mary on October 3, 2006
39. ## Physics 2

A particle moves along a line where the potential energy of its system depends on its position r as graphed in Figure P8.46. In the limit as r increases without bound, U(r) approaches +1 J. (a) Identify each equilibrium position for this particle. Indicate

asked by Anonymous on October 21, 2011
40. ## chemisrty

as a system increases in volume it absorbs 52.5 j of energy in the form of heat form the surroundings. the piston is working against a pressure of 5.00 atm. The final volume of the system is 58,0 L. What is the initial volume of the system if the internal

asked by Jay on November 16, 2010
41. ## Physics

A person slides down a slope. At the end of their slide they are brought gently to rest by a large spring. Friction on the slope cannot be ignored. Draw an energy bar chart for this situation. Define your system any way you want, but clearly state how you

asked by Daniel on December 9, 2015
42. ## physics

A projectile of mass m moves to the right with a speed vi. The projectile strikes and sticks to the end of a stationary rod of mass M, of length d, that is pivoted about a frictionless axle through its center. (a) Find the angular speed of the system right

asked by jack on April 6, 2009
43. ## Chemistry

In the equation Q = mc(deltaT), I learned that Q means heat transfer. Is it the heat transfer from the system to the surroundings, i.e. the system loses/absorbs heat or is it from the surroundings to the system? A couple of places on the Internet say that

asked by a Canadian on March 4, 2013
44. ## Physics HELP!!!

A certain satellite has a kinetic energy of 7.5 billion joules at perigee (closest to Earth) and 3.5 billion joules at apogee (farthest from Earth). As the satellite travels from apogee to perigee, how much work does the gravitational force do on it? Does

asked by Steve on February 29, 2012
45. ## physics to be conceptualize

Which of the following statements are FALSE? Select all that apply. In an isolated system where only conservative forces cause energy changes, the kinetic energy and potential energy of the system can change, but the mechanical energy of the system cannot

asked by member of physics on October 23, 2012
46. ## Physics to Elena

Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

asked by Leila on May 8, 2013
47. ## chemistry

When a photon of light hits the surface of a metal, a photoelectron may be emitted. Some of the photon's energy is required to free the electron from the surface. The remaining energy becomes the kinetic energy of the photoelectron. The minimum energy for

asked by Kristen on October 21, 2013
48. ## Science

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200?

asked by Anonymous on March 8, 2017
49. ## Science

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 J?

asked by Ivan on May 3, 2016
50. ## PHYSICS

Heat transfer Q and work done W are always energy in transit, whereas internal energy E is energy stored in a system. Give an example of each type of energy, and state specifically how it is either in transit or resides in a system.

asked by JAY on November 12, 2016
51. ## Science

A student is trying to identify the different forms of energy described in the following chart: Form of Energy Description Examples Energy A energy that travels in waves through space light radio waves Energy B energy that depends on the height of an

asked by Ariel on November 11, 2015
52. ## Chemistry

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

asked by Richard on October 23, 2007
53. ## Probability

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

asked by Richard on October 23, 2007
54. ## physics

GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules

asked by mm. on March 15, 2010
55. ## Physics

GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules

asked by mm. on March 15, 2010
56. ## physics

Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy

asked by abdul rahman on April 9, 2013
57. ## physics

Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy

asked by dd on April 12, 2013
58. ## physics

I need help understanding these, please. Thanks! 1. A 2 kg body moves with constant velocity when a force of 10 N is applied. What is the coefficient of kinetic friction between the table and the body? (Would I use F=m*g for this??) 2. Which of the

asked by Ellie on October 4, 2015
59. ## Chemistry

"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA

asked by Travis on September 14, 2012
60. ## Astronomy

We can calculate the kinetic energy of any moving object with a very simple formula: kinetic energy = 1/2 mv^2 ,where m is the object's mass and v is its velocity or speed. Table Energy Comparisons shows that metabolizing a candy bar releases about 10^6

asked by Isabelle on October 19, 2010
61. ## SCIENCE PLZZ HELP

Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion

asked by Jason on November 14, 2011
62. ## Science

Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion

asked by Jason on November 14, 2011
63. ## Physics ~please help me!

1.) A car (m=1200 kg) moves form 2.0 m/s to 15.0 m/s in 100 m. a) What is the initial kinetic energy of the car? b) What is the final kinetic energy of the car? c) what is the net work applied to the car? d) what force is applied to the car? 2.) A simple

asked by Isis on February 3, 2013
64. ## chemistry

"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA

asked by Travis on September 14, 2012
65. ## Physics

I'm sorry if it's a lot, but I want to make sure I didn't do any mistakes on this worksheet. Thanks!!1. If the mass of a Ne-20 atom is 19.9924 amu, calculate its binding energy. (I got 2.578 x 10^-11 Joules)2. If the mass of a Ca-40 atom is 39.9626 amu,

asked by Emily on May 9, 2008
66. ## 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?

asked by Chris on May 5, 2014
67. ## Physics

A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J

asked by George on March 8, 2014
68. ## Physics

At its highest point the pendulum is 1.2 meters off the ground and has a gravitational potential energy of 62 Joules. If the gravitational potential energy is 10 Joules at its lowest point. What is the pendulums kinetic energy at this point? Please help!

asked by Ashlynn on February 11, 2015
69. ## physics

You reach out a second-story window that is 17 m above the sidewalk and throw a 2-kg ball straing upward with 17 J of kinetic energy. Use g = 10m/s^2 Part A) What is the ball's gravitational potential energy when it is released? Use a height measured from

asked by Melissa on March 8, 2014
70. ## physics

A 0.240 kg ball moves at a speed of 3.0m/s strikes a wall and bounces straight back at 2.40m/s. The collision lasts 0.0150s. How much kinetice energy in joules is lost during the collision? Wouln't you just subtract the final KE from the initial KE? That

asked by manny on August 19, 2007
71. ## Physics/Math

The Formula you use is the correct one. However, consider this. If the initial PE existed, wouldn't you have to add it to the initial KE then subtract the PE at some R from the center? We normally make ground zero PE level, but for this... Zero, a

asked by bobpursley on March 12, 2007
72. ## physics

Find the threshold energy that the incident neutron must have to produce the reaction 1 n 0 + 4 He 2---> 2 H 1 + 3 H 1 For this, like the 1 n 0

asked by jaimie on February 16, 2007
73. ## chemistry

* A 50 gram sample of an unknown metal warms from 18 to 58 after absorbing 800 joules of energy. what is the specific heat of the metal? *copper has a specific heat of 0.387 j/g degree celsius. what is the mass of a piece of copper that undergoes a 21.0 C

asked by help on December 11, 2012
74. ## Thermodynamics

Steam in a cylinder-piston arrangement expands from an initial condition of 5 bar, 80% dry to a final state of 2 bar, dry saturated steam. The initial volume of steam is 0.8 m3. The process of expansion can be represented by a straight line on the

asked by Phy on October 17, 2014
75. ## Thermodynamics

in a certain process, 500 cal of heat are supplied to a system, and at the same time 100 joules of work are done. what is the increase in the internal energy of the system

asked by Kingchaww on October 16, 2017
76. ## physics

An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. What would be its gravitational potential energy when it is lowered to a shelf 1 m above the ground? o A. 8 joules o B. 12 joules o C. 22 joules o D.

asked by roxy on October 22, 2009
77. ## Analytical Chemistry

A photon of an X-ray radiation has a wavelength of 5.50 Å. For the radiation, calculate the (a)frequency in Hertz, (b)the energy in Joules, (c) the energy in electron volts (eV) and (d) the energy in kJ/mol.

asked by Kelley on December 9, 2010
78. ## Analytical Chemistry

A photon of an X-ray radiation has a wavelength of 5.50 Å. For the radiation, calculate the (a)frequency in Hertz, (b)the energy in Joules, (c) the energy in electron volts (eV) and (d) the energy in kJ/mol.

asked by Kelley on December 9, 2010
79. ## Physics

A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

asked by Allen on June 5, 2014
80. ## Physics

A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

asked by Tami on June 8, 2014
81. ## 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

asked by Anonymous on October 6, 2014
82. ## Science

Which of these correctly describes how a system can store potential energy on the microscopic level?” A. The particles must have position with regards to a reference point if the system stores potential energy B. The particles must be in motion if the

asked by Emily on September 18, 2018
83. ## PHYSICS!!

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much

asked by Vanessa on April 4, 2016
84. ## PHYSICS!!!!

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much

asked by TOM on April 5, 2016
85. ## physics

A 0.500 kg is thrown vertically upward from the ground with an initial speed of 12.0 m/s. Define the initial potential energy to be zero on the ground. What are the potential energy and kinetic energy of the ball at 2.50m above the initial position?

asked by Jeff on November 8, 2012
86. ## SCI

Energy Resource Challenges  Post a 200- to 300-word response to the following: Describe all of the renewable energy alternatives (WIND POWER, SOLAR POWER, BIOMASS FERMENTATION) What are some challenges with using and managing these

asked by Kimberly on January 13, 2008
87. ## Algebra

When a softball player swings a bat, the amount of energy E(t), in joules, that is transferred to the bat can be approximated by the function E(t) = −279.67t2 + 82.86t where 0 ¡Ü t ¡Ü 0.3 and t is measured in seconds. According to this model, what is

asked by Kim on November 4, 2014
88. ## Chemistry

Ionization energy is defined as the minimum energy required to remove an electron from the ground state (n0) to infinity (n∞). Determine the wavelength of radiation required to ionize the hydrogen electron from the n = 2 energy level. Calculate the

asked by Sarah on October 26, 2009
89. ## Physics

A 2.0 lb block is given an initial speed of 4.0 ft/sec up an inclined plane starting from a point 2.0 feet from the bottom as measured along the plane. If the plane makes an angle (theta = 30 degrees) with the horizontal and the coefficient of friction is

asked by Nora on March 12, 2015
90. ## Science (energy)

1. What similarities do nuclear energy and chemical energy share? Choose all that apply. A. Both are types of kinetic energy. B. Both are types of potential energy. [CORRECT!] C. Both involve magnetic energy. D. Both involve stored energy. [CORRECT!] 2. A

asked by newbie on April 18, 2016
91. ## physics

a 0.5 kg ball is thrown upward with an iniatial speed of 10 m/s, what is the initial kinetic energy of the ball and the total mechanical energy assuming initial potential energy is zero.

asked by flor on May 22, 2017
92. ## physics

A. A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 6 J and its initial kinetic energy is 78 J, what is its total energy, E? E: J B. If at a later point its potential energy is -14 J, what is its

asked by carol on October 13, 2013
93. ## Chemistry

A chemical reaction is run in which 132 joules of work is done by the system amd the internal energy changes by 469 joules. Calculate the amount of heat transferred. u=q+w I was going to do 469 = q + 132 but I think this is wrong.

asked by Hannah on January 22, 2012
94. ## physics

1. Calculate the speed in m/s at which the Earth revolves about the sun. You may assume the orbit is nearly circular. 2. A satellite is about 6.5 x 10^3 km from the (center of the) Earth. Find its average orbital speed about the Earth. 3a. A certain

asked by anonymous on July 12, 2010
95. ## physics

A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases

asked by Brian on January 11, 2007
96. ## phyics

A Verdant Power water turbine (a "windmill" in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0

asked by clara on March 9, 2017
97. ## nutrition and wellness

hi, i'm learning about the 3 pathways of energy: The ATP-CP system, The anaerobic glycolysis system, (also called the lactic acid system because lactic acid is a byproduct of this metabolic energy pathway, and the aerobic system. i need to provide three

asked by y912f on July 22, 2009
98. ## Physics

A mass-on-a-spring system has a spring constant k = 384 N/m and a mass m = 0.51 kg. (a) If it is given an initial displacement of 0.22 m and then released, what is the initial potential energy of the oscillator? = 9.29 J (b) What is the maximum kinetic

asked by Jillian on December 9, 2010
99. ## physics

Consider a system of N identical particles. Each particle has two energy levels: a ground state with energy 0, and an upper level with energy . The upper level is four-fold degenerate (i.e., there are four excited states with the same energy ). (a) Write

asked by martin on March 11, 2012
100. ## Science

The Lactic Acid System a. supplies energy needed to walk or cycle continuously b. provides energy to pitch a baseball c. creates energy needed to pass another 5k participant with a burst on energy. d. none of these

asked by Betty on April 3, 2009