What is the temperature at the center of the Sun? A. 6 million °C B. 10 million °C C. 15 million °C (Answer) D. 20 million °C

What is the temperature at the center of the Sun?

A. 6 million °C

B. 10 million °C

C. 15 million °C (Answer)

D. 20 million °C
by

1 Answer

Answer :

C. 15 million °C (Answer)
by

Related questions

Utilizing the answer to the previous problem, estimate the overall or average increase in temperature ( ΔT) of the concrete roof from the energy absorbed from the sun during a12hour day. Assume that all of the radiation absorbed goes into heating the roof. The specific heat of concrete is about 900 J/kg, and the density is about 2,300 kg/m3 .  a. 7.9 °C  b. 8.9°C  c. 9.9°C  d. 10.9°C formula: ΔQ = m c ΔT

Description : Utilizing the answer to the previous problem, estimate the overall or average increase in temperature ( ΔT) of the concrete roof from the energy absorbed from the sun during a12hour day. Assume that all of the radiation absorbed goes into ... °C  b. 8.9°C  c. 9.9°C  d. 10.9°C formula: ΔQ = m c ΔT

Last Answer : 7.9 °C

The time taken by Sun to revolve around the center of our galaxy is------? A. 150 million years B. 250 million years (Answer) C. 300 millon years D. 350 millon years

Description : The time taken by Sun to revolve around the center of our galaxy is------? A. 150 million years B. 250 million years (Answer) C. 300 millon years D. 350 millon years

Last Answer : B. 250 million years (Answer)

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km. (A) 0.05 (B) 1 (C) 6.5 (D) 15

Description : There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called ... is about __________ °C/km. (A) 0.05 (B) 1 (C) 6.5 (D) 15

Last Answer : (C) 6.5

What is the body temperature of a normal man? A. 81.1 °C B. 37.0 °C (Answer) C. 98.6 °C D. 21.7 °C

Description : What is the body temperature of a normal man? A. 81.1 °C B. 37.0 °C (Answer) C. 98.6 °C D. 21.7 °C

Last Answer : B. 37.0 °C (Answer)

Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon- 6. (A) -20 to 25 (B) 50 to 75 (C) 100 to 150 (D) 250-280

Description : Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon- 6. (A) -20 to 25 (B) 50 to 75 (C) 100 to 150 (D) 250-280

Last Answer : (D) 250-280

The surface temperature of the sun is estimated as – (1) 6000 °C (2) 12000 °C (3) 18000 °C (4) 24000 °C

Description : The surface temperature of the sun is estimated as – (1) 6000 °C (2) 12000 °C (3) 18000 °C (4) 24000 °C

Last Answer : (1) 6000 °C Explanation: The surface of the sun is called the photosphere. The photosphere is 340 miles thick and it's temperature s range from 5,500°C to 6,000°C. It has dark spots called sunspots which are the only solar activity observable by the naked eye.

The surface temperature of the sun is estimated as (1) 6000 °C (2) 12000 °C (3) 18000 °C (4) 24000 °C

Description : The surface temperature of the sun is estimated as (1) 6000 °C (2) 12000 °C (3) 18000 °C (4) 24000 °C

Last Answer : 6000 °C

. The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2 .°C-1 . The rate of heat loss from the outer surface in W.m-2 is (A) 165.4 (B) 167.5 (C) 172.5 (D) 175

Description : . The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C-1 respectively. The ambient air is at 30°C ... from the outer surface in W.m-2 is (A) 165.4 (B) 167.5 (C) 172.5 (D) 175

Last Answer : (A) 165.4

In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) (A) t = 15 - 0.0065h (B) t = 15 + 0.0065h (C) t = 0.0035h -15 (D) t = 15 - 0.0035h

Description : In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) (A) t = 15 - 0.0065h (B) t = 15 + 0.0065h (C) t = 0.0035h -15 (D) t = 15 - 0.0035h

Last Answer : (A) t = 15 - 0.0065h

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. (A) 15-30 (B) 90-100 (C) 250-300 (D) < 0

Description : Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. (A) 15-30 (B) 90-100 (C) 250-300 (D) < 0

Last Answer : (A) 15-30

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) (A) t = 15 - 0.0065 h (B) t = 15 + 0.0065 h (C) t = 0.0035 h - 15 (D) t = 15 - 0.0035 h

Description : In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) (A) t = 15 - 0.0065 h (B) t = 15 + 0.0065 h (C) t = 0.0035 h - 15 (D) t = 15 - 0.0035 h

Last Answer : (A) t = 15 - 0.0065 h

90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C. (A) -5 (B) 10-30 (C) 250-280 (D) 500-600

Description : 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C. (A) -5 (B) 10-30 (C) 250-280 (D) 500-600

Last Answer : (C) 250-280

At what temperature does silver melt? A. 275 °C B. 327 °C C.961.8 °C (Answer)

Description : At what temperature does silver melt? A. 275 °C B. 327 °C C.961.8 °C (Answer)

Last Answer : C.961.8 °C (Answer)

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

Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C. (A) 40 (B) 95 (C) 70 (D) 50

Description : Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface ... C will be at a temperature of __________ °C. (A) 40 (B) 95 (C) 70 (D) 50

Last Answer : (C) 70

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞

Description : In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞

Last Answer : (D) ∞

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C. (A) 370 (B) 340 (C) 320 (D) 300

Description : A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C. (A) 370 (B) 340 (C) 320 (D) 300

Last Answer : (A) 370

Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Why are soft drinks made with chilled water rather than water at room temperature? A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Description : Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Why are soft drinks made with chilled water rather than water at room ... B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Last Answer : ANSWER: C

Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the (A) Higher condensing film co-efficient is desired (B) Condensate is corrosive in nature (C) Lower pressure drop through the exchanger is desired (D) Temperature of the incoming vapor is very high Answer: Option B

Description : Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m2 .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat ... drop through the exchanger is desired (D) Temperature of the incoming vapor is very high

Last Answer : (B) Supersaturated

If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in (A) 10 years (B) 15 years (C) 20 years (D) 25 years

Description : If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in (A) 10 years (B) 15 years (C) 20 years (D) 25 years

Last Answer : (D) 25 years

Operating condition in the electrical dehydrators for crude oil is about (A) 6.5 kgf/Cm2 & 95°C (B) 1 atm. & 110 °C (C) 20 kgf/cm2 & 110°C (D) 50 atm. and 150°C

Description : Operating condition in the electrical dehydrators for crude oil is about (A) 6.5 kgf/Cm2 & 95°C (B) 1 atm. & 110 °C (C) 20 kgf/cm2 & 110°C (D) 50 atm. and 150°C

Last Answer : (A) 6.5 kgf/Cm2 & 95°C

The Sun is at an average distance of about---- million kilometers away from Earth? A. 100 million B. 150 million (Answer) C. 200 million D. 250 million

Description : The Sun is at an average distance of about---- million kilometers away from Earth? A. 100 million B. 150 million (Answer) C. 200 million D. 250 million

Last Answer : B. 150 million (Answer)

Sun revolves around milky way in about --- million years. A. 225 B. 230 (Answer) C. 245 D. 250

Description : Sun revolves around milky way in about --- million years. A. 225 B. 230 (Answer) C. 245 D. 250

Last Answer : B. 230 (Answer)

The distance of mercury from sun is-----? A. 56 million km B. 57.9 million km (Answer) C. 58.9 million km D. 59.1 million

Description : The distance of mercury from sun is-----? A. 56 million km B. 57.9 million km (Answer) C. 58.9 million km D. 59.1 million

Last Answer : B. 57.9 million km

A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C. (A) 6 (B) 12 (C) 18 (D) 24

Description : A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature ... difference across the layer A is __________ °C. (A) 6 (B) 12 (C) 18 (D) 24

Last Answer : (B) 12

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively (A) 10 and 120 (B) 1 and 200 (C) 50 and 250 (D) 10 and 300

Description : The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively (A) 10 and 120 (B) 1 and 200 (C) 50 and 250 (D) 10 and 300

Last Answer : (B) 1 and 200

The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m2 .K. At steady state, the temperature of the right face in °C is (A) 77.2 (B) 71.2 (C) 63.8 (D) 48.7

Description : The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the ... temperature of the right face in °C is (A) 77.2 (B) 71.2 (C) 63.8 (D) 48.7

Last Answer : (D) 48.7

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C. (A) -5 to 0 (B) 5 to 10 (C) 30 to 50 (D) 75 to 80

Description : Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C. (A) -5 to 0 (B) 5 to 10 (C) 30 to 50 (D) 75 to 80

Last Answer : (C) 30 to 50

In sulphate pulp manufacture, the pressure and temperature in the digestor is (A) 10 atm., 800 °C (B) 10 atm., 170-180°C (C) 1 atm., 170 - 180°C (D) 1 atm., 800°C

Description : In sulphate pulp manufacture, the pressure and temperature in the digestor is (A) 10 atm., 800 °C (B) 10 atm., 170-180°C (C) 1 atm., 170 - 180°C (D) 1 atm., 800°C

Last Answer : (B) 10 atm., 170-180°C

90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. (A) < 0 (B) 10-30(C) 250-280 (D) 500-600

Description : 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. (A) < 0 (B) 10-30 (C) 250-280 (D) 500-600

Last Answer : (B) 10-30

Coke is made by heating coal in the absence of air at-----? A. 700 °C B. 900 °C C. 1300 °C (Answer) D. 1700 °C

Description : Coke is made by heating coal in the absence of air at-----? A. 700 °C B. 900 °C C. 1300 °C (Answer) D. 1700 °C

Last Answer : C. 1300 °C (Answer)

Freezing point of water is-----? A. 0 °C (Answer) B. -2 °C C. -4 °C D. None of above

Description : Freezing point of water is-----? A. 0 °C (Answer) B. -2 °C C. -4 °C D. None of above

Last Answer : A. 0 °C (Answer)

A 20 L container holds 0.650 mol of He gas at 37 °C at a pressure of 628.3 bar.

Description : A 20 L container holds 0.650 mol of He gas at 37 °C at a pressure of 628.3 bar.

Last Answer : A 20 L container holds 0.650 mol of He gas at 37°C at a pressure of 628.3 bar. What will be new ... and 1.25 mol of additional He gas was added to it?

A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C. (A) 21.7 (B) 20 (C) 27.3 (D) 18.7

Description : A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C. (A) 21.7 (B) 20 (C) 27.3 (D) 18.7

Last Answer : (D) 18.7

Fermentation of molasses to produce ethyl alcohol is done at __________ °C. (A) 20 - 30 (B) < - 5 (C) 100 - 150 (D) 250 - 300

Description : Fermentation of molasses to produce ethyl alcohol is done at __________ °C. (A) 20 - 30 (B) < - 5 (C) 100 - 150 (D) 250 - 300

Last Answer : (A) 20 - 30

Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Most of the ozone in the atmosphere is concentrated in the _____ A. Mesosphere B. Troposphere C. Stratosphere D. Ionosphere

Description : Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Most of the ozone in the atmosphere is concentrated in the _____ A. Mesosphere B. Troposphere C. Stratosphere D. Ionosphere

Last Answer : ANSWER: C

The lower limit of moisture by sun drying is approximately ____ percent. a. 10 c. 20 b. 15 d. 30

Description : The lower limit of moisture by sun drying is approximately ____ percent. a. 10 c. 20 b. 15 d. 30

Last Answer : b. 15

The temperature of O2 is changed from -48.03 °C to 235.59 °C. If its new volume is 29.164 L, what was its original volume in liters ______ L?

Description : The temperature of O2 is changed from -48.03 °C to 235.59 °C. If its new volume is 29.164 L, what was its original volume in liters ______ L?

Last Answer : 12.90(Explanation): use charle's law for this one. V/T=V/T. we know the temperatures in both scenarios, and we're trying to solve for the volume in the beginning. Remember temperature in Kelvin! So, plug in ... Now, divide by 508.59 on both sides to get 12.90042093. Round to 4 sig figs, 12.90 DONE!

Mercury thermometers can be used to measure temperature up to how many °C?

Description : Mercury thermometers can be used to measure temperature up to how many °C?

Last Answer : 360°C

Most of the plastics are safe to be used upto a maximum temperature of __________ °C. (A) 100 (B) 150 (C) 350 (D) 450

Description : Most of the plastics are safe to be used upto a maximum temperature of __________ °C. (A) 100 (B) 150 (C) 350 (D) 450

Last Answer : (B) 150

Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C. (A) 50 (B) 70 (C) 90 (D) 140

Description : Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C. (A) 50 (B) 70 (C) 90 (D) 140

Last Answer : (C) 90

. Sodium melts (at atmospheric pressure) at a temperature of __________ °C. (A) 58 (B) 98 (C) 348 (D) 588

Description : . Sodium melts (at atmospheric pressure) at a temperature of __________ °C. (A) 58 (B) 98 (C) 348 (D) 588

Last Answer : (B) 98

Helical screw agitator is used for (A) Mixing highly viscous pastes (B) Blending immiscible liquids (C) Mixing liquids at very high temperature (> 250 °C) (D) None of these

Description : Helical screw agitator is used for (A) Mixing highly viscous pastes (B) Blending immiscible liquids (C) Mixing liquids at very high temperature (> 250 °C) (D) None of these

Last Answer : (A) Mixing highly viscous pastes

High speed steel tools retain their hardness upto a temperature of __________ °C.(A) 500 (B) 750 (C) 900 (D) 1100

Description : High speed steel tools retain their hardness upto a temperature of __________ °C. (A) 500 (B) 750 (C) 900 (D) 1100

Last Answer : (C) 900

The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Description : The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Last Answer : (B) > 25