In a crystal, an atom vibrates at a frequency determined by

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 In a crystal, an atom vibrates at a frequency determined by the stiffness of the bonds it makes with neighbors.

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In a crystal, an atom vibrates at a frequency determined by (a) the heat content of the crystal (b) the temperature of the crystal (c) the stiffness of the bonds it makes with neighbors

Description : In a crystal, an atom vibrates at a frequency determined by (a) the heat content of the crystal (b) the temperature of the crystal (c) the stiffness of the bonds it makes with neighbors

Last Answer : Ans: C

Total number of crystal systems is

Last Answer : Total number of crystal systems is 7.

If an object vibrates 500 times in a second what will be its frequency?

Description : If an object vibrates 500 times in a second what will be its frequency?

Last Answer : 1.0E+29

Which of the following statements is/are true? A. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B. Shaft vibrates with maximum frequency when rotors rotate in same direction C. Zero node behavior is observed in rotors rotating in opposite direction D. All of the above

Description : Which of the following statements is/are true? A. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B. Shaft vibrates with maximum frequency when rotors ... C. Zero node behavior is observed in rotors rotating in opposite direction D. All of the above

Last Answer : A. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction

Which of the following statements is/are true? A) Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B) Shaft vibrates with maximum frequency when rotors rotate in same direction C) Zero node behavior is observed in rotors rotating in opposite direction D) All of the above

Description : Which of the following statements is/are true? A) Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B) Shaft vibrates with maximum frequency when rotors ... C) Zero node behavior is observed in rotors rotating in opposite direction D) All of the above

Last Answer : A) Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction

A forced vibration system vibrates at A) Natural frequency of the system B) Frequency of external excitation C) Frequency of internal excitation D) None of the above

Description : A forced vibration system vibrates at A) Natural frequency of the system B) Frequency of external excitation C) Frequency of internal excitation D) None of the above

Last Answer : B) Frequency of external excitation

When a two-degree-of-freedom system is subjected to a harmonic force, the system vibrates at the a. frequency of applied force b. smaller natural frequency c. larger natural frequency d. None of the above

Description : When a two-degree-of-freedom system is subjected to a harmonic force, the system vibrates at the a. frequency of applied force b. smaller natural frequency c. larger natural frequency d. None of the above

Last Answer : a. frequency of applied force

Which of the following statements is/are true? a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction b. Shaft vibrates with maximum frequency when rotors rotate in same direction c. Zero node behavior is observed in rotors rotating in opposite direction d. All of the above

Description : Which of the following statements is/are true? a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction b. Shaft vibrates with maximum frequency when rotors ... c. Zero node behavior is observed in rotors rotating in opposite direction d. All of the above

Last Answer : a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction

A cavity that vibrates at its natural frequency produces a louder sound than at other frequencies. What term is used to describe this phenomenon?

Description : A cavity that vibrates at its natural frequency produces a louder sound than at other frequencies. What term is used to describe this phenomenon?

Last Answer : Resonance.

The conductivity of a metal is determined by

Last Answer : The conductivity of a metal is determined by the electronic concentration and the mobility of the free electrons.

_______ is a negatively charged particle present in an atom.

Description : _______ is a negatively charged particle present in an atom.

Last Answer : Electron is a negatively charged particle present in an atom.

A smallest three dimensional part of a crystal lattice is called. a) A particle b) A molecules c) A unit cell d) An atom

Description : A smallest three dimensional part of a crystal lattice is called. a) A particle b) A molecules c) A unit cell d) An atom

Last Answer : c) A unit cell

Is it a good idea to scratch my dog's chin until his leg vibrates like he is itching the ground?

Description : Is it a good idea to scratch my dog's chin until his leg vibrates like he is itching the ground?

Last Answer : I think you might be giving that dog a seizure!

If my steering wheel vibrates/shakes while I am driving.. what could possibly be wrong?

Description : If my steering wheel vibrates/shakes while I am driving.. what could possibly be wrong?

Last Answer : Could be your tires. Have them checked and rotated. Might be your rotors.

The inside of my head vibrates whenever I yawn or gag, sometimes it is so intense that I shed tears. What could be the cause?

Description : The inside of my head vibrates whenever I yawn or gag, sometimes it is so intense that I shed tears. What could be the cause?

Last Answer : Have you been to the doctor? That’s who you should be asking..

I have a motorola krazer. How do I setup the phone to vibrate only. When someone calls in, the phone vibrates but then rings if I don't answer it. Also rings when a voicemail is left. How do I change the setting?

Description : I have a motorola krazer. How do I setup the phone to vibrate only. When someone calls in, the phone vibrates but then rings if I don't answer it. Also rings when a voicemail is left. How do I change the setting?

Last Answer : Without looking at a Motorola Phone in my hand, I can't recall the exact menu-steps to configure the settings; however, if the krazer is the same as past Motorola phones produced, you simply have to ... click the Volume Down button on the side of the handset until it's comlpetely off and on vibrate.

What's at least 6 inches long, goes in your mouth, and is more fun if it vibrates? -Riddles

Description : What's at least 6 inches long, goes in your mouth, and is more fun if it vibrates? -Riddles

Last Answer : A toothbrush. Come on.

which of these items vibrates because a light wave has formed?

Description : which of these items vibrates because a light wave has formed?

Last Answer : an electric field

What part of a ukulele vibrates?

Description : What part of a ukulele vibrates?

Last Answer : Strings

What happens when a window vibrates and the laser has been reflected off the window?

Description : What happens when a window vibrates and the laser has been reflected off the window?

Last Answer : Need answer

What do you call a measure of how many times an object vibrates per second?

Description : What do you call a measure of how many times an object vibrates per second?

Last Answer : That is called the frequency of the vibration. A common unit isthe hertz, equal to cycles per second (or in this case, vibrationsper second).

When the body vibrates under the influence of external force, then the body is said to be under ___________ . * 1 point (A) free vibrations (B) natural vibrations (C) forced vibrations (D) damped vibrations

Description : When the body vibrates under the influence of external force, then the body is said to be under ___________ . * 1 point (A) free vibrations (B) natural vibrations (C) forced vibrations (D) damped vibrations

Last Answer : (C) forced vibrations

The rotating shaft or rotor vibrates with excessive lateral vibration at angular speed at which occurs is called as A) rotating speed B) critical speed C) vibrating speed D) None of the above

Description : The rotating shaft or rotor vibrates with excessive lateral vibration at angular speed at which occurs is called as A) rotating speed B) critical speed C) vibrating speed D) None of the above

Last Answer : B) critical speed

When a system vibrates in a fluid medium, the damping is (a) viscous (b) Coulomb (c) solid

Description : When a system vibrates in a fluid medium, the damping is (a) viscous (b) Coulomb (c) solid

Last Answer : (a) viscous

Refer to the deviation of the operating frequency of a crystal oscillator from its nominal value due to temperature variations. A. Drift B. Flash over C. Frequency deviation D. Deviation ratio

Description : Refer to the deviation of the operating frequency of a crystal oscillator from its nominal value due to temperature variations. A. Drift B. Flash over C. Frequency deviation D. Deviation ratio

Last Answer : A. Drift

Six (6) MHz crystal oscillator has a stability of 1 part in 106. The largest frequency error expected of this crystals A) 0.06 Hz B) 0.6 Hz C) 6 Hz D) 60 Hz.

Description : Six (6) MHz crystal oscillator has a stability of 1 part in 106. The largest frequency error expected of this crystals A) 0.06 Hz B) 0.6 Hz C) 6 Hz D) 60 Hz.

Last Answer : C) 6 Hz

An oscillator that uses crystal control should be A) Frequency stable B) useful only at low frequencies C) AVFO D) none of the above.

Description : An oscillator that uses crystal control should be A) Frequency stable B) useful only at low frequencies C) AVFO D) none of the above.

Last Answer : A) Frequency stable

What is the impedance of a crystal at its resonant frequency when it is used in the series mode?

Description : What is the impedance of a crystal at its resonant frequency when it is used in the series mode?

Last Answer : Minimum.

What is the impedance of a crystal at its resonant frequency when it is used in the parallel mode?

Description : What is the impedance of a crystal at its resonant frequency when it is used in the parallel mode?

Last Answer : Maximum

In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor

Description : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is  (a) > 100 (b) > 500 (c) > 1000 (d) > 20000

Last Answer : In a radio transmitter, the frequency of the crystal oscillator will be stable for a long time if the quality factor of the crystal resonator is  > 1000

The crystal oscillator frequency is very stable due to

Last Answer : The crystal oscillator frequency is very stable due to High Q of the crystal.

The coordination number of a central metal atom in a complex is determined by:

Description : The coordination number of a central metal atom in a complex is determined by:

Last Answer : The coordination number of a central metal atom in a complex is determined by: A. the number of ... ligands around a metal ion bonded by sigma bonds

How is radius of an atom determined?

Description : How is radius of an atom determined?

Last Answer : What is the answer ?

(3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of the atom, the electron configuration determines how it will bond, with what it will bond, and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Description : (3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of ... , and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Last Answer : Methyl phenyl ether can be obtained by reacting - (1) phenolate ions and methyl iodide (2) methoxide ions and bromobenzene (3) methanol and phenol (4) bromobenzene and methyl bromide

Which of the following scientists first determined the atomic number of an atom by use of X-rays? Is it: w) Millikan x) Planck y) Thompson z) Moseley

Description : Which of the following scientists first determined the atomic number of an atom by use of X-rays? Is it: w) Millikan x) Planck y) Thompson z) Moseley

Last Answer : ANSWER: Z -- MOSELEY

The amount and Intensity of monsoon rainfall is determined by the frequency of (a) western disturbances (b) dust storms (c) cyclones (d) tropical depressions

Description : The amount and Intensity of monsoon rainfall is determined by the frequency of (a) western disturbances (b) dust storms (c) cyclones (d) tropical depressions

Last Answer : Ans: (d)

The rainfall at any place may be determined by A. Its intensity B. Its direction C. Its frequency D. All the above

Description : The rainfall at any place may be determined by A. Its intensity B. Its direction C. Its frequency D. All the above

Last Answer : ANS: D

The frequency of an alternator at a given RPM is determined by the _____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Description : The frequency of an alternator at a given RPM is determined by the _____________. A. number of turns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage

Last Answer : Answer: B

In energy method for finding frequency of the system A The sum of kinetic and potential energy is constant B The sum of kinetic and potential energy is zero C Frequency cannot be determined by energy method D None of the mentioned

Description : In energy method for finding frequency of the system A The sum of kinetic and potential energy is constant B The sum of kinetic and potential energy is zero C Frequency cannot be determined by energy method D None of the mentioned

Last Answer : A The sum of kinetic and potential energy is constant

The structure of newspaper is determined by: A. Circulation B. Frequency of publication C. Size D. None of these

Description : The structure of newspaper is determined by: A. Circulation B. Frequency of publication C. Size D. None of these

Last Answer : A. Circulation

The frequency range of a waveguide is determined by what dimensions?

Description : The frequency range of a waveguide is determined by what dimensions?

Last Answer : . The "a" dimension.

How is the Resonant Peak (Mr), resonant frequency (ωr), and band width determined from Nichols chart?

Description : How is the Resonant Peak (Mr), resonant frequency (ωr), and band width determined from Nichols chart?

Last Answer : i) The resonant peak is given by the value of ω contour which is tangent to G(j ω ii) The resonant frequency is given by the frequency of G(jω iii) The bandwidth is given by frequency corresponding to the intersection point of G(jω – 3dB M-contour.

Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^

Description : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^

Last Answer : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of ... of the orbit `=0.2xx10^(-11) m`.

A particular hydrogen like atom with radiation of frequency `2.467 xx 10^(15)Hz` when it makes transition from `n = 3 to n = 1` ,What will be the freq

Description : A particular hydrogen like atom with radiation of frequency `2.467 xx 10^(15)Hz` when it makes transition from `n = 3 to n = 1` ,What will be the freq

Last Answer : A particular hydrogen like atom with radiation of frequency `2.467 xx 10^(15)Hz` when it makes transition from ... a transition from `n = 3 to n= 1`?

Ferromagnets

Description : Ferromagnets

Last Answer : Ferromagnets Only certain materials, such as iron, cobalt, nickel, and gadolinium, exhibit strong magnetic effects. Such materials are called ferromagnetic, after the Latin word for iron, ... licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

The attraction capacity of electromagnet will increase if the

Last Answer : Atrraction  capacity  will  increase  if  supply  current  is  increased.

Temporary magnets are used in

Last Answer : Temporary magnets are used in loud-speakers,generators, motors.

Main causes of noisy solenoid are

Last Answer : Main causes of noisy solenoid are strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force, uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts.

Core of an electromagnet should have

Last Answer : Core of an electromagnet should have low coercivity, high susceptibility.

Magnetism of a magnet can be destroyed by

Last Answer : Magnetism of a magnet can be destroyed by heating, hammering, by inductive action of another magnet.