Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge
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Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Last Answer : The answer is 'Hertz'

Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Last Answer : answer:

1. Sex determination of child is done by whose chromosome? 2. Who is authorised to decide over a dispute regarding disqualification of a member of Parliament? 3. Who firstly demonstrated experimentally the existence of electromagnetic wave? 4. Which is not essentially a species of the Himalayan vegetation? 5. What are the main channels of our knowledge about the Indus Valley Civilization?

Description : 1. Sex determination of child is done by whose chromosome? 2. Who is authorised to decide over a dispute regarding disqualification of a member of Parliament? 3. Who firstly demonstrated ... of bargets, coasters and dredgers? 20. In which country was Buddhism first propogated outside India?

Last Answer : Answer : 1. Father 2. President 3. Hertz 4. Mahogany 5. Archaeological excavations 6. December 20 7. International Year of Volunteers 8. Increase growth in lenght 9. Tropical moist deciduous ... . Boxing 17. Herbert Spencer 18. During a Financial Emergency 19. Garden Reach Shipyard 20. Srilanka

Who firstly demonstrated experimentally the existence of electromagnetic wave?

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave?

Last Answer : Hertz

Who firstly predicated the existence of electromagnetic waves? -Do You Know?

Description : Who firstly predicated the existence of electromagnetic waves? -Do You Know?

Last Answer : answer:

Who firstly predicated the existence of electromagnetic waves?

Description : Who firstly predicated the existence of electromagnetic waves?

Last Answer : Maxwell

1. Who firstly predicated the existence of electromagnetic waves? 2. Who is the winner of Saraswati Samman 2012? 3. When was decimal coinage introduced in India? 4. Why have continents have drifted apart? 5. Which ruler was adorned with the title of 'Maharajadhiraja' (King of Kings) ?

Description : 1. Who firstly predicated the existence of electromagnetic waves? 2. Who is the winner of Saraswati Samman 2012? 3. When was decimal coinage introduced in India? 4. Why have continents ... makes maximum use of the geothermal energy? 20. Under which Sultan, Khalisa land increased considerably?

Last Answer : Answer : 1. Maxwell 2. A.A. Manavalan 3. 1957 4. Because of tectonic activities 5. Chandragupta I 6. Ecosystem 7. Nargis Dutt 8. Flint glass 9. Japan Sea 10. Narasimhavarman 11. Amour 12. Mohd. Azharuddin 13 ... 16. Governor 17. Unit north pole 18. V. K. R. V. Rao 19. Iceland 20. Alauddin Khilji

Who among the following demonstrated experimentally that simple organic molecules like sugar s and amino acids could be produced from inorganic molecules if early earth atmosphere is created (a) Donald Brown (b) A.I. Oparin (c) Oscar Miller (d) Stanley Miller

Description : Who among the following demonstrated experimentally that simple organic molecules like sugar s and amino acids could be produced from inorganic molecules if early earth atmosphere is created (a) Donald Brown (b) A.I. Oparin (c) Oscar Miller (d) Stanley Miller

Last Answer : Ans:(d)

Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

Description : Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

Last Answer : ANSWER: (C. D.) ANDERSON

The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.

Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.

Last Answer : ANSWER: X -- DAVISSON AND GERMER

When the post-cardiac surgery patient demonstrates restlessness, nausea, weakness, and peaked T waves, the nurse reviews the patient’s serum electrolytes anticipating which abnormality? a) Hyperkalemia Hyperkalemia is indicated by mental confusion, restlessness, nausea, weakness, and dysrhythmias (tall, peaked T waves). b) Hypercalcemia Hypercalcemia would likely be demonstrated by asystole. c) Hypomagnesemia Hypomagenesemia would likely be demonstrated by hypotension, lethargy, and vasodilation. d) Hyponatremia Hyponatremia would likely be indicated by weakness, fatigue, and confusion without change in T wave formation

Description : When the post-cardiac surgery patient demonstrates restlessness, nausea, weakness, and peaked T waves, the nurse reviews the patient's serum electrolytes anticipating which abnormality? a) Hyperkalemia ... likely be indicated by weakness, fatigue, and confusion without change in T wave formation

Last Answer : a) Hyperkalemia Hyperkalemia is indicated by mental confusion, restlessness, nausea, weakness, and dysrhythmias (tall, peaked T waves).

The wave nature of light is demonstrated by which of the following? A. The photoelectric effect B. Color C. The speed of light D. Diffraction

Description : The wave nature of light is demonstrated by which of the following? A. The photoelectric effect B. Color C. The speed of light D. Diffraction

Last Answer : D. Diffraction

The wave nature of light is demonstrated by which of the following? w) the photoelectric effect x) color y) the speed of light z) diffraction

Description : The wave nature of light is demonstrated by which of the following? w) the photoelectric effect x) color y) the speed of light z) diffraction

Last Answer : ANSWER: Z -- DIFFRACTION

9. One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. -Physics-10

Description : 9. One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. -Physics-10

Last Answer : Yes, it will produce a complete image of the object, as shown in the figure. This can be verified experimentally by observing the image of a distant object like a tree on a screen when the ... the lens is covered with a black paper. However, the intensity or brightness of the image will reduce.

How is electrolytic conductance measured experimentally?

Description : How is electrolytic conductance measured experimentally?

Last Answer : Electrolyte conductance can be measured by putting anode and cathode on it and measured the external voltage. Then compared the same with some standard known electrolyte solution. Also, specific ... charge discharge method. So by calculating with inbuilt software we can easily get the conductance.

While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 c

Description : While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 c

Last Answer : While determining the refractive index of a liquid experimentally, the microscope was focussed at the ... . Find the refractive index of the liquid.

Explain :  Electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

Description : Explain :  Electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

Last Answer : Explain : Electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action

Description : Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action

Last Answer : Answer : B

The theory of spontaneous generation of life was experimentally disproved by: 1. Francesco Redi 2. Lamark 3. Leeuwenhock 4. Louis Pasteur Select the correct answer using the codes given below: (a) Only 1 (b) 2 and 3 (c) 1 and 4 (d) Only 4

Description : The theory of spontaneous generation of life was experimentally disproved by: 1. Francesco Redi 2. Lamark 3. Leeuwenhock 4. Louis Pasteur Select the correct answer using the codes given below: (a) Only 1 (b) 2 and 3 (c) 1 and 4 (d) Only 4

Last Answer : Ans:(c)

What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed Correct (4) Answer – (1) energy is always absorbed Explanation: If a bond is broken, energy is released; and if a bond is formed, energy must have been absorbed. As these occur, a change in the chemical energy of the system also occurs. Within each bond of a molecule is an experimentally determined amount of enemy that upon the breaking of that bond is released into the chemical system. The energy within these bonds are 'stored' and can be easily thought of as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

Oxygen was experimentally prepared by

Description : Oxygen was experimentally prepared by

Last Answer : Karl Scheele

Nucleic acids are unique among the biopolymers in that they contain phosphate. How has this property been exploited experimentally in studies

Description : Nucleic acids are unique among the biopolymers in that they contain phosphate. How has this property been exploited experimentally in studies of protein synthesis?

Last Answer : The use of 32P (radioactive) to label DNA and RNA for Southern and northern blotting was a major technical advance. One of the earliest exploitations of the unique phosphorus content of nucleic ... machinery to direct the synthesis of many copies of the virus, eventually leading to host cell.  

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)? (A) ε = ε0 + α.t (B) ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t

Description : Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined ... ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t

Last Answer : (A) ε = ε0 + α.t

The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the (A) Reaction is elementary with a molecularity of 2 (B) Molecularity of the reaction is 2, but the reaction may not be elementary (C) Reaction may be elementary with molecularity of 2 (D) Reaction is elementary but the molecularity may not be 2

Description : The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the (A) Reaction is elementary with a molecularity of 2 (B) Molecularity of the reaction is 2, ... Reaction may be elementary with molecularity of 2 (D) Reaction is elementary but the molecularity may not be 2

Last Answer : (A) Reaction is elementary with a molecularity of 2

Pick out the wrong statement. (A) 'Hold back' is defined as the fraction of material that stays longer than the mean residence time (B) Study of non-ideal flow reactor is done experimentally by stimulus￾response technique (C) For studying a chemical reaction, it is desirable to monitor the reactants during initial stages and the products during the final stages of reaction (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

Description : Pick out the wrong statement. (A) 'Hold back' is defined as the fraction of material that stays longer than the mean residence time (B) Study of non-ideal flow reactor is done experimentally ... final stages of reaction (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

Last Answer : (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

The order of a chemical reaction is (A) An experimentally determined quantity (B) Always equal to the total stoichiometric number of reactants (C) Never fractional (D) None of these

Description : The order of a chemical reaction is (A) An experimentally determined quantity (B) Always equal to the total stoichiometric number of reactants (C) Never fractional (D) None of these

Last Answer : (A) An experimentally determined quantity

All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally

Description : All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally

Last Answer : in a direction that cannot be predicted but must be determined experimentally

The order of a chemical reaction (A) Can be determined only experimentally (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero (D) Can be fractional

Description : The order of a chemical reaction (A) Can be determined only experimentally (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero (D) Can be fractional

Last Answer : (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero

de Broglie’s relation for matter waves was experimentally verified by: a) Davisson b) Germer c) G.P. Thomson d) All the these

Description : de Broglie’s relation for matter waves was experimentally verified by: a) Davisson b) Germer c) G.P. Thomson d) All the these

Last Answer : c) G.P. Thomson

38. “Increased diversity contributed to higher productivity” –was experimentally proved by ... b) David Tilman b) Paul Ehrlich c) Alexander Von Humbolt d) Robert May

Description : 38. “Increased diversity contributed to higher productivity” –was experimentally proved by ... b) David Tilman b) Paul Ehrlich c) Alexander Von Humbolt d) Robert May

Last Answer : b) David Tilman

18. “Increased diversity contributed to higher productivity” –was experimentally proved by ... a) David Tilman b) Paul Ehrlich c) Alexander Von Humbolt d) Robert May

Description : 18. “Increased diversity contributed to higher productivity” –was experimentally proved by ... a) David Tilman b) Paul Ehrlich c) Alexander Von Humbolt d) Robert May

Last Answer : a) David Tilman

Coacervates were experimentally produced by a) Oparin and Haldane b) Darwin c) Aristotle d) Louis Pasture

Description : Coacervates were experimentally produced by a) Oparin and Haldane b) Darwin c) Aristotle d) Louis Pasture 

Last Answer : a) Oparin and Haldane

Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have to measure the cell potential to obtain the difference in potential energy because the potential of half-reactions cannot be measured directly. C The direction of a redox reaction can only be determined experimentally. D Half-cell potentials for half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Description : Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have ... half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Last Answer : C The direction of a redox reaction can only be determined experimentally. 

The value of G, the universal gravitational constant, was measured experimentally by: w) Newton x) Cavendish y) Copernicus z) Kepler

Description : The value of G, the universal gravitational constant, was measured experimentally by: w) Newton x) Cavendish y) Copernicus z) Kepler

Last Answer : ANSWER: X -- CAVENDISH

is An electromagnetic wave is a mechanical wave/true or false?

Description : is An electromagnetic wave is a mechanical wave/true or false?

Last Answer : an electromagnetic wave is not a mechanical wave

Who invented the electromagnetic wave ?

Description : Who invented the electromagnetic wave ?

Last Answer : Scientist Maxwell discovered.

Which is the electromagnetic wave ? ① Alpha ray , ② beta ray , gamma ray , ④ cathode ray

Description : Which is the electromagnetic wave ? ① Alpha ray , ② beta ray , gamma ray , ④ cathode ray

Last Answer : Gamma ray electromagnetic waves.

What is Electromagnetic Wave ?

Last Answer : Waves that do not require any medium to conduct are called electromagnetic waves.

What is the energy of a electromagnetic wave with a frequency of 3 x 109 Hz?

Description : What is the energy of a electromagnetic wave with a frequency of 3 x 109 Hz?

Last Answer : 1.99 x 10-24

Why cathode ray can not be regarded as electromagnetic wave?

Description : Why cathode ray can not be regarded as electromagnetic wave?

Last Answer : A cathode ray is a stream of electrons, not a stream of photonslike the electromagnetic wave. It's a different type of particle.The electrons don't move at light speed in a vacuum; also, they areelectrically charged.

How are the different types of electromagnetic wave organized?

Description : How are the different types of electromagnetic wave organized?

Last Answer : By frequency on the electromagnetic spectrum

What is the energy of an electromagnetic wave with a frequency of 3x10 9 HZ?

Description : What is the energy of an electromagnetic wave with a frequency of 3x10 9 HZ?

Last Answer : Feel Free to Answer

Is heat an electromagnetic wave or mechanical wave?

Description : Is heat an electromagnetic wave or mechanical wave?

Last Answer : Radiant heat is electromagnetic radiation.Thermal heat is the micro kinetic energy of the component atomsor molecules of a material substance.The "or" of the question can not be answered because there is no"or" involved.

Which describes an electromagnetic wave?

Description : Which describes an electromagnetic wave?

Last Answer : A transverse wave consisting of changing electric fields and changing magnetic fields

What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Description : What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Last Answer : ANSWER: B

What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Description : What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Last Answer : ANSWER: B

What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Description : What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System

Last Answer : ANSWER: B

Which one among the following is not an electromagnetic wave? (1) X-Ray (2) R-Ray (3) Cathode Ray (4) Infrared Ray

Description : Which one among the following is not an electromagnetic wave? (1) X-Ray (2) R-Ray (3) Cathode Ray (4) Infrared Ray

Last Answer : (3) Cathode Ray Explanation: In physics, electromagnetic radiation (EMR) refers to the waves (or their quanta, photons) of the electro-magnetic field, propagating (radiating) through space carrying ... includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-, and gamma radiation.

Which electromagnetic radiation is used for satellite communication? (1) Ultraviolet (2) Infrared (3) Microwave (4) Millimeter wave

Description : Which electromagnetic radiation is used for satellite communication? (1) Ultraviolet (2) Infrared (3) Microwave (4) Millimeter wave

Last Answer : (3) Microwave Explanation: Microwave electromagnetic radiation is used for satellite communication.

A device that converts high frequency current into electromagnetic wave. A. Antenna B. Loudspeaker C. Microphone D. Transducer

Description : A device that converts high frequency current into electromagnetic wave. A. Antenna B. Loudspeaker C. Microphone D. Transducer

Last Answer : A. Antenna