When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will: (1) remain same (2) double (3) three times (4) four times

When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will: (1) remain same (2) double (3) three times (4) four times
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When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will: (1) remain same (2) double (3) three times (4) four times

Description : When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will: (1) remain same (2) double (3) three times (4) four times

Last Answer : (2) double Explanation: According to Newton's law of cooling, the rate of loss of heat of a body is directly proportional to the difference between the temperature of hot body and temperature of the surroundings, provided that the difference in temperature is small enough.

Which law states, “The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings.” (1) Doppler’s Effect (2) Newton’s law of cooling (3) Kirchhoff’s Law (4) Stefan’s Law

Description : Which law states, “The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings.” (1) Doppler’s Effect (2) Newton’s law of cooling (3) Kirchhoff’s Law (4) Stefan’s Law

Last Answer : (2) Newton’s law of cooling Explanation: Kirchhoff’s Law – Kirchhoff’s Law signifies that good absorbers are good emitters. Stefan’s Law – The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.

Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings." (1) Doppler's Effect (2) Newton's law of cooling (3) Kirchhoff's Law (4) Stefan's Law

Description : Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings." (1) Doppler's Effect (2) Newton's law of cooling (3) Kirchhoff's Law (4) Stefan's Law

Last Answer : (2) Newton's law of cooling Explanation: Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters. Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.

Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings"? (1) Doppler's Effect (2) Newton's law of cooling (3) Kirchhoff's Law (4) Stefan's Law

Description : Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings"? (1) Doppler's Effect (2) Newton's law of cooling (3) Kirchhoff's Law (4) Stefan's Law

Last Answer : (2) Newton's law of cooling Explanation: Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature.

If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter

Description : If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter

Last Answer : ANSWER: Z -- ONE QUARTER

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

If we double the temperature of an ideal gas, then it's average kinetic energy will be A. halved B. triple the original C. fourth times of original D. doubled

Description : If we double the temperature of an ideal gas, then it's average kinetic energy will be A. halved B. triple the original C. fourth times of original D. doubled

Last Answer : doubled

When the speed of a train moving on a circular track is doubled, the centripetal force acting on the train does one of the following. Does the force: w) remain the same x) increase by a factor of 2 y) increase by a factor of 4 z) increase by a factor of 8

Description : When the speed of a train moving on a circular track is doubled, the centripetal force acting on the train does one of the following. Does the force: w) remain the same x) increase by a factor of 2 y) increase by a factor of 4 z) increase by a factor of 8

Last Answer : ANSWER: Y -- INCREASE BY A FACTOR OF 4

In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Description : In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Last Answer : Answer: Option D

In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Description : In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Last Answer : Answer: Option A

In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Description : In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be (A) Double (B) Four times (C) Eight times (D) Sixteen times

Last Answer : Answer: Option A

If depth of a beam is doubled then changes in its section modulus a. Will remain same b. Will decrease c. Will be doubled d. Will increase by 4 times

Description : If depth of a beam is doubled then changes in its section modulus a. Will remain same b. Will decrease c. Will be doubled d. Will increase by 4 times

Last Answer : d. Will increase by 4 times

In Joule-Thomson porous plug experiment, the (A) Enthalpy does not remain constant (B) Entire apparatus is exposed to surroundings (C) Temperature remains constant (D) None of these

Description : In Joule-Thomson porous plug experiment, the (A) Enthalpy does not remain constant (B) Entire apparatus is exposed to surroundings (C) Temperature remains constant (D) None of these

Last Answer : (D) None of these

When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance? (1) four times (2) two times (3) half (4) one-fourth

Description : When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance? (1) four times (2) two times (3) half (4) one-fourth

Last Answer : (1) four times Explanation: Brake force, also known as Brake Power, is a measure of braking power of a vehicle. Suppose a car whose mass is 'x' and is braked from a speed of y km/hr to come to ... the car is four times the original speed i.e. '4v'. Note that all the parameters remain to be same.

When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ? (1) four times (2) two times (3) half (4) one-fourth

Description : When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ? (1) four times (2) two times (3) half (4) one-fourth

Last Answer :  four times

If the diameter of a capillary is doubled, then the rise of water in it will be – (1) two times (2) half (3) four times (4) no change

Description : If the diameter of a capillary is doubled, then the rise of water in it will be – (1) two times (2) half (3) four times (4) no change

Last Answer : (2) half Explanation: Radius of a capillary tube is inversely proportional to the height of the liquid column. So, if radius of the tube is doubled, rise of level of water will becomes half ... to flow in narrow spaces without the assistance of, and in opposition to external forces like gravity.

Two negative point charges are 2 meters apart and repel each other with a force of 2 newtons. When the distance between the charges is doubled, the force between them is w) one fourth as great x) one half as great y) twice as great z) four times as great

Description : Two negative point charges are 2 meters apart and repel each other with a force of 2 newtons. When the distance between the charges is doubled, the force between them is w) one fourth as great x) one half as great y) twice as great z) four times as great

Last Answer : ANSWER: W -- ONE FOURTH AS GREAT

If the diameter of a capillary is doubled, then the rise of water in it will be (1) two times (2) half (3) four times (4) no change

Description : If the diameter of a capillary is doubled, then the rise of water in it will be (1) two times (2) half (3) four times (4) no change

Last Answer : half

In a cooling tower, water becomes cool by (A) Loosing sensible heat (B) Heat transfer to surroundings (C) Vaporisation due to heat loss to air (D) Loosing latent heat

Description : In a cooling tower, water becomes cool by (A) Loosing sensible heat (B) Heat transfer to surroundings (C) Vaporisation due to heat loss to air (D) Loosing latent heat

Last Answer : (A) Loosing sensible heat

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will (A) Increase (B) Decrease (C) Remain unchanged (D) Either increase or decrease; depends on the coolant flow rate

Description : In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation ... Decrease (C) Remain unchanged (D) Either increase or decrease; depends on the coolant flow rate

Last Answer : (C) Remain unchanged

Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Description : Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Last Answer : (4) All of these Explanation: Newton's Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the ... Specific heat of the radiating body; Temperature of radiating body and ♦ Temperature of the surrounding.

Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Description : Rate of cooling depends on the (1) Temperature difference between the body and the surroundings (2) Nature of the radiating surface (3) Area of the radiating surface (4) All of these

Last Answer : All of these

When the current flow in a power transmission line is halved, the power loss _____________. A. is halved B. is doubled C. is divided by four D. remains the same

Description : When the current flow in a power transmission line is halved, the power loss _____________. A. is halved B. is doubled C. is divided by four D. remains the same

Last Answer : Answer: C

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will (A) Remain the same (B) Be halved (C) Also be doubled (D) Become one fourth

Description : In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will (A) Remain the same (B) Be halved (C) Also be doubled (D) Become one fourth

Last Answer : (A) Remain the same

When distance from center is doubled then electric field strength will A. decrease by the factor of four B. increase by factor of four C. will be same D. decrease by factor of two

Description : When distance from center is doubled then electric field strength will A. decrease by the factor of four B. increase by factor of four C. will be same D. decrease by factor of two

Last Answer :  decrease by the factor of four

. If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will (A) Increase by 1.8 times (B) Decrease by 2 2 (C) Increase by 2 16 (D) Remain unchanged

Description : . If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will (A) Increase by 1.8 times (B) Decrease by 2 2 (C) Increase by 2 16 (D) Remain unchanged

Last Answer : (C) Increase by 2 16

The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises from 10 to 100°C. (A) 256 (B) 512 (C) 112 (D) 612

Description : The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises from 10 to 100°C. (A) 256 (B) 512 (C) 112 (D) 612

Last Answer : (B) 512

a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become: (1) 128 times (2) 256 times (3) 512 times (4) 64 times

Description : a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become: (1) 128 times (2) 256 times (3) 512 times (4) 64 times

Last Answer : 512times

2. In a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become: (1) 128 times (2) 256 times (3) 512 times (4) 64 times

Description : 2. In a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become: (1) 128 times (2) 256 times (3) 512 times (4) 64 times

Last Answer : 256 times

In a simple DC circuit, the resistance is held constant while the applied voltage is halved. Current flow, therefore, will ______________. A. double B. remain the same C. be divided by two D. be divided by four

Description : In a simple DC circuit, the resistance is held constant while the applied voltage is halved. Current flow, therefore, will ______________. A. double B. remain the same C. be divided by two D. be divided by four

Last Answer : Answer: C

If magnetic field is doubled then magnetic energy density becomes: a. Four times b. Two times c. Three times d. Six times

Description : If magnetic field is doubled then magnetic energy density becomes: a. Four times b. Two times c. Three times d. Six times

Last Answer : c. Three times

If diameter of a shaft is doubled the power transmitted capacity will be a. Either twice or half b. Four times c. Eight times d. Same

Description : If diameter of a shaft is doubled the power transmitted capacity will be a. Either twice or half b. Four times c. Eight times d. Same

Last Answer : c. Eight times

In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation. (A) Adiabatic (B) Isothermal (C) Non-adiabatic (D) None of these

Description : In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation. (A) Adiabatic (B) Isothermal (C) Non-adiabatic (D) None of these

Last Answer : (C) Non-adiabatic

$ The animals in which body temperature varies according to the surroundings are called poikilothermal animals. ! Human beings have four chambered hea

Description : $ The animals in which body temperature varies according to the surroundings are called poikilothermal animals. ! Human beings have four chambered hea

Last Answer : $ The animals in which body temperature varies according to the surroundings are called poikilothermal animals. ! ... D. If both As and R are wrong.

In convection heat transfer, if heat flux intensity is doubled then temperature difference between solid surface and fluid will ?

Description : In convection heat transfer, if heat flux intensity is doubled then temperature difference between solid surface and fluid will ?

Last Answer : Get doubled.

For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of (A) 2 (B) < 2 (C) > 2 (D) 1/2

Description : For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of (A) 2 (B) < 2 (C) > 2 (D) 1/2

Last Answer : (A) 2

If the velocity of flow as well as the diameter of the flowing pipe are respectively doubled through a pipe system in use since long, the head loss will thereafter be (a) Halved (b) Doubled (c) Increased 4 times (d) No change

Description : If the velocity of flow as well as the diameter of the flowing pipe are respectively doubled through a pipe system in use since long, the head loss will thereafter be (a) Halved (b) Doubled (c) Increased 4 times (d) No change

Last Answer : (b) Doubled

Drinks remain hot or cold for a long time in a thermos flask because of the (a) presence of air, which is a bad conductor of heat, in between the double walls (b) silver coating on the inside of the double walls (c) vacuum between the double walls (d) combined effects of (b) and (c)

Description : Drinks remain hot or cold for a long time in a thermos flask because of the (a) presence of air, which is a bad conductor of heat, in between the double walls (b) silver coating on the inside of the double walls (c) vacuum between the double walls (d) combined effects of (b) and (c)

Last Answer : Ans:(d)

For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of (A) 1 (B) 1.74 (C) 6.1 (D) 37

Description : For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of (A) 1 (B) 1.74 (C) 6.1 (D) 37

Last Answer : (C) 6.1

When the velocity of a body is doubled, its 1. acceleration is doubled 2. momentum is doubled 3. kinetic energy becomes four times 4. potential energy is doubled Which of the above is/are correct? (a) 2 only (b) 2 and 3 (c) 3 only (d) 2 and 4

Description : When the velocity of a body is doubled, its 1. acceleration is doubled 2. momentum is doubled 3. kinetic energy becomes four times 4. potential energy is doubled Which of the above is/are correct? (a) 2 only (b) 2 and 3 (c) 3 only (d) 2 and 4

Last Answer : Ans:(b)

Two bodies each have a mass 'M'. If the mass of each body is doubled, the force of attraction between the two bodies is: w) twice the original force x) 1/4 the original force y) 4 times the original force z) unchanged

Description : Two bodies each have a mass 'M'. If the mass of each body is doubled, the force of attraction between the two bodies is: w) twice the original force x) 1/4 the original force y) 4 times the original force z) unchanged

Last Answer : ANSWER: Y -- 4 TIMES THE ORIGINAL FORCE

Why is the temperature of a thermometer the same as the temperature of the surroundings?

Description : Why is the temperature of a thermometer the same as the temperature of the surroundings?

Last Answer : Heat energy gets exchanged between the thermometer and thesurroundings. So, if you introduce the thermometer into a newsurrounding, it will initially NOT have the same temperature.However, since it's ... , it willsoon lose or gain temperature, until it has the same temperature asits surroundings.

When the speed of a body is doubled, its kinetic energy becomes (a) double (b) half (c) quadruple (d) one-fourth

Description : When the speed of a body is doubled, its kinetic energy becomes (a) double (b) half (c) quadruple (d) one-fourth

Last Answer : Ans:(c)

If the length of a cable is doubled, its capacitance (a) becomes one-fourth (b) becomes one-half (c) becomes double (d) remains unchanged

Description : If the length of a cable is doubled, its capacitance (a) becomes one-fourth (b) becomes one-half (c) becomes double (d) remains unchanged

Last Answer : (c) becomes double

A gas at 0 degrees C and at normal atmospheric pressure has a volume of 273 cubic centimeters. If it is held at constant pressure until its volume is doubled, its temperature will be which one of the following? Will it be w) 2 degrees Celsius x) 200 degrees Celsius y) 273 degrees Celsius z) 546 degrees Celsius

Description : A gas at 0 degrees C and at normal atmospheric pressure has a volume of 273 cubic centimeters. If it is held at constant pressure until its volume is doubled, its temperature will be which one of the ... it be w) 2 degrees Celsius x) 200 degrees Celsius y) 273 degrees Celsius z) 546 degrees Celsius

Last Answer : ANSWER: Y -- 273 DEGREES CELSIUS

A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Description : A thin, flat & square plate measuring 2 m 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will ... heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Last Answer : (B) 100

If a copper wire is increased to double its length, its resistance will become – (1) four times (2) one-fourth (3) double (4) half

Description : If a copper wire is increased to double its length, its resistance will become – (1) four times (2) one-fourth (3) double (4) half

Last Answer : (3) double Explanation: There is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. After all, if resistance occurs as the result of collisions ... the atoms of the wire, then there is likely to be more collisions in a longer wire.

If a copper wire is increased to double its length, its resistance will become (1) four times (2) one–fourth (3) double (4) half

Description : If a copper wire is increased to double its length, its resistance will become (1) four times (2) one–fourth (3) double (4) half

Last Answer : double

A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation a.The length of pendulum should be quadrupled b.The length of pendulum should be doubled c.The mass of the bob should be halved d.The length of pendulum should be reduced to one fourth e.The mass of the bob should be doubled

Description : A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation a.The length of pendulum should be quadrupled b.The ... length of pendulum should be reduced to one fourth e.The mass of the bob should be doubled

Last Answer : a. The length of pendulum should be quadrupled