Description : Sound cannot pass through – (1) Water (2) Steel (3) Air (4) Vacuum
Last Answer : (4) Vacuum Explanation: Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing. Sound ... propagation). Sound cannot travel through a vacuum because it does not provide the medium to propagate.
Description : Among the following materials sound travels fastest in – (1) Steel (2) Air (3) Vacuum (4) Water
Last Answer : (1) Steel Explanation: The speed of sound is the distance travelled during a unit of time by a sound wave propagating through an elastic medium. In dry air at 20 °C (68 °F), the speed ... varies from substance to substance. Sound travels faster in liquids and non-porous solids than it does in air.
Description : Among the following materials sound travels fastest in (1) Steel (2) Air (3) Vacuum (4) Water
Last Answer : Steel
Description : Sound cannot pass through (1) water (2) steel (3) air (4) vacuum
Last Answer : vacuum
Description : The velocity of sound is more in – (1) water (2) air (3) steel (4) wood
Last Answer : (3) steel Explanation: Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, ... liquids, and fastest through solids. They travel over 17 times faster through steel than through air.
Description : The velocity of sound is more in (1) water (2) air (3) steel (4) wood
Last Answer : steel
Description : The velocity of heat radiation in vacuum is – (1) Equal to that of light (2) Less than that of light (3) Greater than that of light (4) Equal to that of sound
Last Answer : (1) Equal to that of light Explanation: Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the ... Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
Description : The velocity of heat radiation in vacuum is (1) Equal to that of light (2) Less than that of light (3) Greater than that of light (4) Equal to that of sound
Last Answer : Equal to that of light
Description : Sound travels fastest in (a) Air (b) Water (c) Vacuum (d) Steel
Last Answer : Ans:(d)
Description : A glass prism has a refracting angle of `60^@`. The angle of minimum deviation is `40^@`. If velocity of light in vacuum is `3 xx 10^8 m//s`. Calculat
Last Answer : A glass prism has a refracting angle of `60^@`. The angle of minimum deviation is `40^@`. If ... of light in glass. What is the angle of incidence ?
Description : In which medium, velocity of sound is maximum? (1) Metals (2) Air (3) Water (4) Polymer
Last Answer : (1) Metals Explanation: The speed of sound is highest in solid. The speed of sound depends on the density of the medium through which it is travelling.
Description : The velocity of light in vacuum is : (1) 3 * 108 ms-1 (2) 2 * 108 ms-1 (3) 3 * 107 ms-1 (4) 3 * 106 ms-1
Last Answer : (1) 3 * 108 ms-1 Explanation: The speed of light in a vacuum is 186,282 miles per second that corresponds to about 3 * 108 ms-1.
Description : The kinetic energy of a stone falling near the earth's surface through a vacuum increases with the: w) square root of its velocity x) cube root of its velocity y) square of its velocity z) cube of its velocity
Last Answer : ANSWER: Y -- SQUARE OF ITS VELOCITY
Description : The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than city air (2) less pressure than dry air (3) more pressure than dry air (4) more density than dry air
Last Answer : (1) less density than city air Explanation: The density of dry air is more than that of moist air (when moisture is removed from air, its density. increases). The speed of sound in a medium is inversely ... root of its density. Therefore, the speed of sound in moist air is more than that in dry air.
Description : The velocity of sound in air – (1) decreases with increase of temperature (2) increases with decrease of temperature (3) does not depend on temperature (4) decreases with decrease of temperature
Last Answer : (4) decreases with decrease of temperature Explanation: Assuming air to be an ideal gas, the speed of sound c depends on temperature only, not on the pressure or density. As air ... to the individual air particles having extra kinetic energy at higher temperatures and lesser at lower temperatures.
Description : Velocity of sound in air does not change with the change of – (1) Temperature of air (2) Pressure of air (3) Moisture content in air (4) Wind in the direction of propagation of sound
Last Answer : (2) Pressure of air Explanation: The speed of sound in an ideal gas is independent of frequency, but it weakly depends on frequency for all real physical situations. It is a function of the ... ideal gas. Sound speed is slightly dependent on pressure only because air is not quite an ideal gas.
Description : Velocity of sound in air does not depend on – (1) Density of air (2) Temperature of air (3) Pressure of air (4) Humidity of air
Last Answer : (3) Pressure of air Explanation: Assuming air to be an ideal gas, the speed of sound depends on temperature only. As air temperature increases, so does the speed of sound and vice versa. ... air pressure because the air pressure and air density are proportional to each other at the same temperature.
Description : Velocity of sound in air does not depend on (1) Density of air (2) Temperature of air (3) Pressure of air (4) Humidity of air
Last Answer : Pressure of air
Description : The velocity of sound in air (1) decreases with increase of temperature (2) increases with decrease of temperature (3) does not depend on temperature (4) decreases with decrease of temperature
Last Answer : decreases with decrease of temperature
Description : Velocity of sound in air does not change with the change of (1) Temperature of air (2) Pressure of air (3) Moisture content in air (4) Wind in the direction of propagation of sound
Description : The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than dry air. (2) less pressure than dry air. (3) more pressure than dry air. (4) more density than dry air.
Last Answer : less density than dry air.
Description : Sound waves can be transmitted by any (1) Medium (2) Vacuum (3) Both medium and vacuum (4) None of the above
Last Answer : (1) Medium Explanation: Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. It requires a medium to propagate.
Description : Sound and light waves both _______. (1) have similar wavelength (2) obey the laws of reflection (3) travel as longitudinal waves (4) travel through vacuum
Last Answer : (2) obey the laws of reflection Explanation: The two laws of reflection of light are applicable to sound waves as well. The incident wave, the normal to the reflecting surface and the reflected wave at the point of incidence lie in the same plane.
Description : Which waves cannot be transmitted through vacuum - (1) Light (2) Heat (3) Sound (4) Electromagnetic
Last Answer : (3) Sound Explanation: Sound waves cannot be transmitted through vacuum. It is transmitted by the movement of particles along with the direction of the motion of the sound wave. More generally, sound is a mechanical disturbance which is dependent upon a medium to travel.
Description : These waves cannot be trans-mitted through vacuum – (1) Light (2) Sound (3) Heat (4) Electromagnetic
Last Answer : (2) Sound Explanation: Sound is a mechanical wave that is created by vibrating objects and propagated through a medium from one location to another. Because mechanical waves rely on particle interaction ... space that are void of particles. That is, mechanical waves cannot travel through a vacuum.
Description : Which of the following does NOT travel in a vacuum? w) radio waves x) gamma rays y) magnetic waves z) sound waves
Last Answer : ANSWER: Z -- SOUND WAVES
Description : These waves cannot be transmitted through vacuum (1) Light (2) Sound (3) Heat (4) Electromagnetic
Last Answer : Sound
Description : Which of the following represents the accepted method of cleaning dust and foreign particles from electrical equipment while limiting damage to electric components? A. Carefully wiping off the components ... the components. D. Using carbon tetrachloride as a cleaning solvent to clean the components.
Last Answer : Answer: C
Description : Which of the following circuit breakers has high reliability and minimum maintenance ? (a) Air blast circuit breakers (b) Circuit breaker with SF6 gas (c) Vacuum circuit breakers (d) Oil circuit breakers
Last Answer : (b) Circuit breaker with SF6 gas
Description : Boundary layer separation occurs when the (A) Pressure reaches a minimum (B) Cross-section of the channel is reduced (C) Valve is closed in a pipeline (D) Velocity of sound is reached
Last Answer : (B) Cross-section of the channel is reduced
Description : Which of these travels in glass with minimum velocity? (1) red light (2) violet light (3) green light (4) yellow light
Last Answer : (2) violet light Explanation: Red light has a longer wavelength than violet light and the other colours of visible light have intermediate wavelengths. As light passes from air into glass, there is ... and is refracted the least, while violet waves travel the slowest and is refracted the most.
Description : What is the minimum escape velocity of rocket to be launched into space? (1) 5 Km/Sec. (2) 6 Km/Sec. (3) 11 Km/Sec. (4) 15 Km/Sec.
Last Answer : (3) 11 Km/Sec. Explanation: On the surface of the Earth, the escape velocity is about 11.2 kilometers per second 06.96 mi/s), which is approximately 34 times the speed of sound (Mach ... velocity is the speed at which the kinetic energy plus the gravitational potential energy of an object is zero.
Description : Which of these travels in glass with minimum velocity ? (1) red light (2) violet light (3) green light (4) yellow light
Last Answer : violet light
Description : What is the minimum escape velocity of rocket to be launched into space ? (1) 5 Km/Sec. (2) 6 Km/Sec. (3) 11 Km/Sec.(4) 15 Km/Sec.
Last Answer : 11 Km/Sec.
Description : What kind of velocity of sound ?
Last Answer : The velocity of sound is a balanced velocity.
Description : If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound? (1) 4 : 1 (2) 2 : 1 (3) 1 : 16 (4) 1 : 4
Last Answer : (4) 1 : 4
Description : Quality of a musical note depends on – (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium
Last Answer : (3) Harmonics present Explanation: Sound "quality" or "timbre" describes those characteristics of sound which allow the ear to distinguish sounds which have the same pitch and loudness. Timbre is mainly ... and the attack-decay envelope of the sound. Harmonic content is the most important of these.
Description : Which one among the following doesn't have any effect on velocity of sound? (1) Pressure (2) Temperature (3) Humidity (4) Density
Last Answer : (3) Humidity Explanation: The speed of sound varies depending on the temperature, pressure, and density of the medium through which the sound waves travel. In most of the cases, it is density ... (or other material). The density of air is affected by atmospheric pressure, temperature, and altitude.
Description : The loudness of sound depends upon (1) Velocity (2) Pitch (3) Amplitude (4) Wavelength
Last Answer : (3) Amplitude Explanation: Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude).
Description : The pitch of sound depends on its – (1) Frequency (2) Intensity (3) Velocity (4) Amplitude
Last Answer : (1) Frequency Explanation: Pitch is a perceptual property that allows the ordering of sounds on a frequencyrelated scale. Pitch may be quantified as a frequency, but pitch is not a purely objective physical property; it is a subjective psychoacoustical attribute of sound.
Description : Velocity of sound waves through any material depends on A. the material's density ‘d’ only B. the material's density ‘d’ as well as its modulus of elasticity ‘E’ C. the material's modulus of elasticity ‘E’ only D. neither the material's density ‘d’ nor its modulus of elasticity ‘E’
Last Answer : the material's density ‘d’ as well as its modulus of elasticity ‘E’
Description : The crack of a bullwhip results from the bullwhip's tip: w) approaching the speed of sound x) exceeding the speed of sound y) moving with constant velocity z) none of the above
Last Answer : ANSWER: X -- EXCEEDING THE SPEED OF SOUND
Description : If viewed on an oscilloscope, the loudness of a sound wave would be associated with the wave's: w) frequency x) wavelength y) velocity z) amplitude
Last Answer : ANSWER: Z -- AMPLITUDE
Description : Quality of a musical note depends on (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium
Last Answer : Harmonics present
Last Answer : 1 : 4
Description : Which one among the following doesn't have any effect on velocity of sound ? (1) Pressure (2) Temperature (3) Humidity (4) Density
Last Answer : Humidity
Description : The pitch of sound depends on its (1) Frequency(2) Intensity (3) Velocity (4) Amplitude
Last Answer : Frequency
Description : Which is best used as a sound absorbing material in partition walls? (1) Stone chips (2) Steel (3) Glass – wool (4) Glass pieces
Last Answer : (3) Glass – wool Explanation: Materials that do not transfer mechanical energy well. These tend to be soft, flexible, low density, and with high surface area to linear area ratios.
Description : Which is best used as a sound absorbing material in partition walls? (1) Stone chips (2) Steel (3) Glass - wool (4) Glass pieces
Last Answer : (3) Glass - wool Explanation: Materials that do not transfer mechanical energy well. These tend to be soft, flexible, low density, and with high surface area to linear area ratios.
Description : What is the term for the ratio of actual velocity at which a signal travels through a line to the speed of light in a vacuum? A. Velocity factor B. Characteristic impedance C. Surge impedance D. Standing wave ratio
Last Answer : A. Velocity factor