How A 500 g piece of iron changes 7 C when heat is added. How much heat energy in joules is produced due to this change in temperature?

How A 500 g piece of iron changes 7 C when heat is added. How much heat energy in joules is produced due to this change in temperature?
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In Joule's experiment, an insulated container contains 20 kg of waterinitially at 25°C. It is stirred by an agitator, which is made to turn by aslowly falling body weighing 40 kg through a height of 4 m. The process isrepeated 500 times. The acceleration due to gravity is 9.8 ms-2. Neglectingthe heat capacity of agitator, the temperature of water (in °C) is(A) 40.5(B) 34.4(C) 26.8(D) 25

Description : In Joule's experiment, an insulated container contains 20 kg of waterinitially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated ... temperature of water (in °C) is (A) 40.5 (B) 34.4 (C) 26.8 (D) 25

Last Answer : (B) 34.4

How many joules of heat are necessary to melt 500 g of ice at it's freezing point?

Description : How many joules of heat are necessary to melt 500 g of ice at it's freezing point?

Last Answer : Heat required to melt 1 g of ice at 0°C is approximately 80 cal . This is also called latent heat of fusion of ice.

A man picks up a 50 kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block? w) 1,000 joules x) 750 joules y) 500 joules z) 0 joules

Description : A man picks up a 50 kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block? w) 1,000 joules x) 750 joules y) 500 joules z) 0 joules

Last Answer : ANSWER: Z -- 0 JOULES

A machine having an efficiency of 50% does 500 joules of work. Which of the following is the work input? Is it: w) 500 joules x) 250 joules y) 1000 joules z) 2500 joules

Description : A machine having an efficiency of 50% does 500 joules of work. Which of the following is the work input? Is it: w) 500 joules x) 250 joules y) 1000 joules z) 2500 joules

Last Answer : ANSWER: Y -- 1000 JOULES

For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.  a. Nemst Effect  b. Caloric Theory  c. Joule’s Law  d. Newton’s Law of Cooling

Description : For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.  a. Nemst Effect  b. Caloric Theory  c. Joule’s Law  d. Newton’s Law of Cooling

Last Answer : Newton’s Law of Cooling

The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature.  a. Charle’s Law  b. Boyle’s Law  c. Joule’s Law  d. Specific Heat

Description : The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature.  a. Charle’s Law  b. Boyle’s Law  c. Joule’s Law  d. Specific Heat

Last Answer : Boyle’s Law

The amount of heat energy per kilogram that must be added or removed when a substance changes from one phase to another.  a. specific heat  b. heat of expansion  c. latent heat  d. useful heat

Description : The amount of heat energy per kilogram that must be added or removed when a substance changes from one phase to another.  a. specific heat  b. heat of expansion  c. latent heat  d. useful heat

Last Answer : latent heat

The potential difference across a 4 ohm resistor is 20 volts. Assuming that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?

Description : The potential difference across a 4 ohm resistor is 20 volts. Assuming that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?  

Last Answer : ANSWER: 1000 JOULES

In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about  (a) 100 xlOO5 joules  (b) lxlO5 joules  (c) 10 xlO5 joules  (d) 10 xlO5 kilo joules  (e) 10xl04ki\ojoules.

Description : In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about  (a) 100 xlOO5 joules  (b) lxlO5 joules  (c) 10 xlO5 joules  (d) 10 xlO5 kilo joules  (e) 10xl04ki\ojoules.

Last Answer : Answer : c

How would the equilibrium change if NO2 were added to SO2(g)+NO2(g)=NO(g)+SO3(g)+heat?

Description : How would the equilibrium change if NO2 were added to SO2(g)+NO2(g)=NO(g)+SO3(g)+heat?

Last Answer : The amount of NO and SO3 would increased.

An object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth. If the acceleration due to gravity is 10 meters per second squared, the potential energy of the object relative to the surface of the earth is: w) 10 joules x) 20 joules y) 100 joules z) 250 joules e) none of the above

Description : An object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth. If the acceleration due to gravity is 10 meters per second squared, the potential energy of the object relative to the ... is: w) 10 joules x) 20 joules y) 100 joules z) 250 joules e) none of the above

Last Answer : ANSWER: Z -- 250 JOULES

How many joules are required to boil 21.1 g of water at 100 C?

Description : How many joules are required to boil 21.1 g of water at 100 C?

Last Answer : The needed heat is 47,65 Joules.

According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant  (a) Joule’s law  (b) Boyle’s law  (c) Regnault’s law  (d) Gay-Lussac law  (e) Charles’ law.

Description : According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant  (a) Joule’s law  (b) Boyle’s law  (c) Regnault’s law  (d) Gay-Lussac law  (e) Charles’ law.

Last Answer : Answer : e

Which law states that the internal energy of a gas is a function of temperature  (a) Charles’ law  (b) Joule’s law  (c) Regnault’s law  (d) Boyle’s law  (e) there is no such law.

Description : Which law states that the internal energy of a gas is a function of temperature  (a) Charles’ law  (b) Joule’s law  (c) Regnault’s law  (d) Boyle’s law  (e) there is no such law.

Last Answer : Answer : b

Two thick slices of bread, when completely oxidized by the body, can supply 200,000 cal of heat. How much work is this equivalent to?  a) 4,190,000 joules  b) 8,390,000 joules  c) 839,000 joules  d) 419 000 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie

Description : Two thick slices of bread, when completely oxidized by the body, can supply 200,000 cal of heat. How much work is this equivalent to?  a) 4,190,000 joules  b) 8,390,000 joules  c) 839, ... d) 419 000 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie

Last Answer : 419 000 joules

An adiabatic process is one in which  A.no heat enters or leaves the gas  B.the temperature of the gas changes  C.the change in internal energy is equal to the mechanical workdone  D.all of the above

Description : An adiabatic process is one in which  A.no heat enters or leaves the gas  B.the temperature of the gas changes  C.the change in internal energy is equal to the mechanical workdone  D.all of the above

Last Answer : Answer: D

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C. (A) 768 (B) 908 (C) 1400 (D) 1539

Description : The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C. (A) 768 (B) 908 (C) 1400 (D) 1539

Last Answer : Option A

The theory that heat consisted of a fluid, which could be transferred from one body to another, but not “created” or “destroyed”.  a. Clausius Theorem  b. Caloric Theory  c. Joules Law  d. Newton’s Law of cooling

Description : The theory that heat consisted of a fluid, which could be transferred from one body to another, but not “created” or “destroyed”.  a. Clausius Theorem  b. Caloric Theory  c. Joules Law  d. Newton’s Law of cooling

Last Answer : Caloric Theory

How many joules of work is the equivalent of 15000 cal of heat?  a) 62850 joules  b) 3579.95 joules  c) 14995.81 joules  d) 15004.19 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie

Description : How many joules of work is the equivalent of 15000 cal of heat?  a) 62850 joules  b) 3579.95 joules  c) 14995.81 joules  d) 15004.19 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie

Last Answer : 62850 joules

Which law states that the specific heat of a gas remains constant at all temperatures and pressures  (a) Charles’ Law  (b) Joule’s Law  (c) Regnault’s Law  (d) Boyle’s Law  (e) there is no such law.

Description : Which law states that the specific heat of a gas remains constant at all temperatures and pressures  (a) Charles’ Law  (b) Joule’s Law  (c) Regnault’s Law  (d) Boyle’s Law  (e) there is no such law.

Last Answer : Answer : c

In order to find the specific heat capacity of an unknown material a 50 g piece is heated to 80 degrees Celsius and fully immersed in a well insulated calorimeter filled with 100 g of water at 10 degr?

Description : In order to find the specific heat capacity of an unknown material a 50 g piece is heated to 80 degrees Celsius and fully immersed in a well insulated calorimeter filled with 100 g of water at 10 degr?

Last Answer : Assuming that the full question, which the questioner failed to post, is given in the Discussion, below.Taking the specific heat capacity of water as 4.2 Joules per gram per degree C, the metal has a specific heat capacity as approx 0.68 Joules/(g °C).

The total iron content of the human body is (A) 400–500 mg (B) 1–2 g (C) 2–3 g (D) 4–5 g

Description : The total iron content of the human body is (A) 400–500 mg (B) 1–2 g (C) 2–3 g (D) 4–5 g

Last Answer : Answer : D

A 1-kg steam-water mixture at 1.0 MPa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPa and the temperature to 400°. Determine the heat added.  a) 1378.7 kJ  b) 1348.5 kJ  c) 1278,7 kJ  d) 1246,5 kJ Formula: Q = (h2 – p2v2) –(h1 –p1v1)

Description : A 1-kg steam-water mixture at 1.0 MPa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPa and the temperature to 400°. Determine the heat added.  a) 1378.7 kJ  b) 1348.5 kJ  c) 1278,7 kJ  d) 1246,5 kJ Formula: Q = (h2 – p2v2) –(h1 –p1v1)

Last Answer : 1378.7 kJ

Find the change in internal energy of 5 lb. of oxygen gas when the temperature changes from 100 ˚F to 120 ˚F. CV = 0.157 BTU/lbm-˚R  A.14.7 BTU  B.15.7 BTU  C. 16.8 BTU  D. 15.9 BTU Formula: U= mcv T

Description : Find the change in internal energy of 5 lb. of oxygen gas when the temperature changes from 100 ˚F to 120 ˚F. CV = 0.157 BTU/lbm-˚R  A.14.7 BTU  B.15.7 BTU  C. 16.8 BTU  D. 15.9 BTU Formula: U= mcv T

Last Answer : 15.7 BTU

During pregnancy, the following should be added to the calculated energy requirement: (A) 300 kcal/day (B) 500 kcal/day (C) 700 kcal/day (D) 900 kcal/day

Description : During pregnancy, the following should be added to the calculated energy requirement: (A) 300 kcal/day (B) 500 kcal/day (C) 700 kcal/day (D) 900 kcal/day

Last Answer : Answer : A

When quick lime is added to water (1) heat is liberated (2) heat is absorbed (3) temperature decreases (4) no heat change takes place

Description : When quick lime is added to water (1) heat is liberated (2) heat is absorbed (3) temperature decreases (4) no heat change takes place

Last Answer : (1) heat is liberated Explanation: When quick lime is added to water, then a chemical reaction takes places and slaked lime is formed, evolving heat in this process. It makes the water boil.

The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree.  A. Latent heat of fusion  B. Molar heat  C. Specific heat capacity  D. Specific heat

Description : The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree.  A. Latent heat of fusion  B. Molar heat  C. Specific heat capacity  D. Specific heat

Last Answer : Specific heat capacity

When quick lime is added to water (1) heat is liberated (2) heat is absorbed (3) temperature decreases (4) no heat change takes place

Description : When quick lime is added to water (1) heat is liberated (2) heat is absorbed (3) temperature decreases (4) no heat change takes place

Last Answer :  heat is liberated

Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Description : Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to ... Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Last Answer : (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot

One erg is equivalent to how many joules?  A. 10^-8  B. 10^-7  C. 10^-6  D. 10^-5

Description : One erg is equivalent to how many joules?  A. 10^-8  B. 10^-7  C. 10^-6  D. 10^-5

Last Answer : 10^-7

An electron is moved through a potential difference of 1 volt. How much energy in joules was used to move the electron?

Description : An electron is moved through a potential difference of 1 volt. How much energy in joules was used to move the electron? 

Last Answer : ANSWER: 1.6 x 10-19 JOULES

Which of the following has the maximum specific heat capacity? (1) water (2) piece of iron (3) piece of gold (4) chloroform

Description : Which of the following has the maximum specific heat capacity? (1) water (2) piece of iron (3) piece of gold (4) chloroform

Last Answer : (1) water Explanation: The quantity of heat required to raise the temperature of a substance by one degree Celsius is called its specific heat capacity.

Which of the following has got more heat capacity? (1) Iron piece (2) Water (3) Gold piece (4) Benzene

Description : Which of the following has got more heat capacity? (1) Iron piece (2) Water (3) Gold piece (4) Benzene

Last Answer : (2) Water Explanation: Heat capacity (usually denoted by a capital C, often with subscripts), or thermal capacity, is the measurable physical quantity that characterizes the amount of heat required to change a substance's ... (SI), heat capacity is expressed in units of joule(s) (J) per Kelvin (K).

A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance? a) iron nail b)glass c)stone piece d)wood

Description : A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance? a) iron nail b)glass c)stone piece d)wood

Last Answer : d)wood

Which of the following has got more heat capacity ? (1) Iron piece (2) Water (3) Gold piece(4) Benzene

Description : Which of the following has got more heat capacity ? (1) Iron piece (2) Water (3) Gold piece(4) Benzene

Last Answer : Water

Measurement of temperature is based on  (a) thermodynamic properties  (b) zeroth law of thermodynamics  (c) first law of thermodynamics  (d) second law of thermodynamics  (e) joule’s law.

Description : Measurement of temperature is based on  (a) thermodynamic properties  (b) zeroth law of thermodynamics  (c) first law of thermodynamics  (d) second law of thermodynamics  (e) joule’s law.

Last Answer : Answer : b

How many joules are required to cause the temperature of one gram of water to be raised from 24 degrees Celsius to 25 degrees Celsius.

Description : How many joules are required to cause the temperature of one gram of water to be raised from 24 degrees Celsius to 25 degrees Celsius.  

Last Answer : ANSWER: 4.18 JOULES

Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is prepared by mixing soap with hydrated sodium carbonate (C) Detergents differ from soaps in their action in hard water (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Description : Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is ... ., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Last Answer : (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N m^(-2)`, then the change in internal energy

Description : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N m^(-2)`, then the change in internal energy

Last Answer : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N ... . `-100 J` C. `+100 J` D. None of these

If a system absorbs 500 cal of heat at the same time does 400J of work, find the change in internal energy of the system.  a. 1400 J  b. 1700 J  c. 1900 J  d. 1500 J

Description : If a system absorbs 500 cal of heat at the same time does 400J of work, find the change in internal energy of the system.  a. 1400 J  b. 1700 J  c. 1900 J  d. 1500 J

Last Answer : 1700 J

Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Description : Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Last Answer : Option A

What do you understand by the units of electrical energy? How many joules of energy is consumed if the electrical meter shows 200 units of energy ? -Science

Description : What do you understand by the units of electrical energy? How many joules of energy is consumed if the electrical meter shows 200 units of energy ? -Science

Last Answer : Unit of electrical energy is defined as the energy spent or used by electrical appliance at the rate of 1 kw For (t) hours 1 kwh = 1000 W *3600s ... = 400* 3.6*10^6 J = 144*10^7 J

A body is moving with velocity 4 m/s , possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to -Physics

Description : A body is moving with velocity 4 m/s , possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to -Physics

Last Answer : (d) 28 kgms-1

How many joules of energy is consumed when one watt power works in 1 second ?

Last Answer : One watt power working in 1 second will consume 1 joule of energy.

What is the photon energy for an infrared wave with frequency of 1012 Hz? a. 10.6 x 1034 joules b. 6.63 x 10-34 joules c. 6.63 x 10-22 joules d. 10.6 x 1022 joules

Description : What is the photon energy for an infrared wave with frequency of 1012 Hz? a. 10.6 x 1034 joules b. 6.63 x 10-34 joules c. 6.63 x 10-22 joules d. 10.6 x 1022 joules

Last Answer : c. 6.63 x 10-22 joules

A flywheel of moment of inertia 9.8kgm 2 fluctuates by 30 rpm for a fluctuation in energy of 1936 joules. The means speed of flywheel is (in rpm) 1. 600 2. 900 3. 968 4. 2940

Description : A flywheel of moment of inertia 9.8kgm 2 fluctuates by 30 rpm for a fluctuation in energy of 1936 joules. The means speed of flywheel is (in rpm) 1. 600 2. 900 3. 968 4. 2940

Last Answer : 1. 600

A circular solid of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in joules is 1. 395 2. 790 3. 1580 4. 3160

Description : A circular solid of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in joules is 1. 395 2. 790 3. 1580 4. 3160

Last Answer : 2. 790

Which one of the following statement is correct? (A) Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation (B) The rate of transfer of radiant energy is called flux and is expressed in watts (C) The radiant energy which falls upon a surface is termed as irradiance (D) All of these

Description : Which one of the following statement is correct? (A) Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation (B) The rate of transfer of radiant energy is called flux ... ) The radiant energy which falls upon a surface is termed as irradiance (D) All of these

Last Answer : Answer: Option D

What is the photon energy for an infrared wave with frequency of 1012 Hz? ∙ a. 10.6 x 1034 joules ∙ b. 6.63 x 10-34 joules ∙ c. 6.63 x 10-22 joules ∙ d. 10.6 x 1022 joules

Description : What is the photon energy for an infrared wave with frequency of 1012 Hz? ∙ a. 10.6 x 1034 joules ∙ b. 6.63 x 10-34 joules ∙ c. 6.63 x 10-22 joules ∙ d. 10.6 x 1022 joules

Last Answer : ∙ c. 6.63 x 10-22 joules

An electric heater consumes 1000 Joules of energy in 5 seconds. Its power rating is: a) 200 W b) 1000 W c) 5000W d) none of the above

Description : An electric heater consumes 1000 Joules of energy in 5 seconds. Its power rating is: a) 200 W b) 1000 W c) 5000W d) none of the above

Last Answer : a) 200 W