Description : The swing of a spinning cricket ball in air can be explained on the basis of – (1) Sudden change in wind direction. (2) Buoyancy of air. (3) Turbulence caused by wind. (4) Bernoulli's theorem.
Last Answer : (3) Turbulence caused by wind. Explanation: The main theory of swing bowling surrounded turbulent and laminar airflow. Laminar air separates from the surface of the ball earlier than turbulent flow air, ... towards the back; inducing a greater lift force on the turbulent airflow side of the ball.
Description : The swing of a spinning cricket ball in air can be explained on the basis of (a) Sudden change in wind direction (b) Buoyancy of air (c) Turbulence caused by wind (d) Bernoulli’s theorem
Last Answer : Ans:(d)
Description : The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to (A) Buoyancy (B) Equilibrium of a floating body (C) Archimedes' principle (D) Bernoulli's theorem
Last Answer : Answer: Option C
Description : Hydraulic brakes work on the principle of – (1) Thomson's law (2) Newton's law (3) Bernoulli's theorem (4) PascaQl's law
Last Answer : (4) Pascal's law Explanation: Hydraulic brake works on Pascal's law which states that pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure variations remain the same.
Description : The hydraulic brake used in automobiles is a direct application of - (1) Archimedes principle (2) Torricellean law (3) Bernoulli's Theorem (4) Pascal's law
Last Answer : (4) Pascal's law Explanation: Pascal's law basically states that any pressure applied to a fluid inside a closed system will transmit that pressure equally in all directions throughout the fluid.
Description : 'Hydraulic brakes' work on the principle of – (1) Pascal's law (2) Thomson's law (3) Newton's law (4) Bernoulli's theorem
Last Answer : (1) Pascal's law Explanation: Pascal's law states that when there is an increase in pressure at any point in a confined fluid, there is an equal increase at every other point in the container ... a pressure exerted on a piston produces an equal increase in pressure on another piston in the system.
Description : The hydraulic brakes used in automobiles is a direct application of : (1) Archimedes' principle (2) Toricellian law (3) Bernoulli's theorem (4) Pascal's law
Last Answer : (4) Pascal's law Explanation: Pascal's principle guarantees that the pressure is transmitted equally to all parts of the enclosed fluid system. This gives straightline braking unless there is a fluid leak or ... to the actual brake mechanism, which is usually at or near the wheel of the vehicle.
Description : ‘Hydraulic brakes’ work on the principle of (1) Pascal’s law (2) Thomson’s law (3) Newton’s law (4) Bernoulli’s theorem
Last Answer : Pascal’s law
Description : The hydraulic brakes used in automobiles is a direct application of : (1) Archimedes’ principle (2) Toricellian law (3) Bernoulli’s theorem (4) Pascal’s law
Description : The vertical movement of air is termed as – (1) wind (2) air current (3) air turbulence (4) air mobility
Last Answer : (2) air current Explanation: An updraught or downdraught is the vertical movement of air as a weather related phenomenon. Better known as air current, they can be caused by differences in temperature ... lighter." Rising air is associated with turbulence as it creates a low pressure on the surface.
Description : Shortly after take-off, the altitude of the aeroplane suffers an abrupt pitch-up and IAS rapidly decreases followed quickly by a decrease in altitude. Engine indications are normal. You should suspect what ... to gain airspeed d. Local clear air turbulence; reduce speed to VRA and ride it out
Last Answer : b. Loss of head wind or an increase in tail wind; apply full power
Description : The vertical movement of air is termed as (1) wind (2) air current (3) air turbulence (4) air mobility
Last Answer : air current
Description : Hydrodynamica gave explanation of Bernoulli’s theorem in 1738. Who was the first to suggest this theorem?
Last Answer : Answer: Daniel Bernoulli.
Description : Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? (A) Venturimeter (B) Orifice plate (C) Nozzle (D) All of the above
Last Answer : Answer: Option D
Description : When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called (A) Pascal's law (B) (C) Principle of floatation (D) Bernoulli's theorem
Last Answer : Answer: Option B
Description : What Is Bernoulli's Theorem. State Its Application?
Last Answer : Bernoulli's theorem states that the total energy of a liquid flowing from one point to another remains constant'. It is applicable for non-compressible liquids. For different types of liquid flow ... indicator. It can also be used to low pressure in the venturi tubes present in carburetor.
Description : Explain Bernoulli’s Theorem. State Its Application?
Description : The speed at which a liquid escapes from a vessel through an orifice is given by _________. a. Archimedes Principle b. Evangelista’s Law c. Torricelli’s Theorem d. Bernoulli’s Equation
Last Answer : Torricelli’s Theorem
Description : What states that for a confined fluid, the pressure at a point has the same magnitude in all directions? A. Avogadro’s Law B. Amagat Law C. Pascal’s Law D. Bernoulli’s Theorem
Last Answer : Pascal’s Law
Description : What is Bernoulli's theorem and where it is applicable?
Last Answer : Bernoulli's theorem states the "total energy of a liquid flowing from one point to another remains constant." It is applicable for non compressible liquids.
Description : Explain Bernoulli’s theorem with neat sketch. State its two important assumptions.
Last Answer : This theorem states that whenever there is continuous flow of liquid the total energy at every section remains same provided that there is no any addition or loss of energy. Let us consider ... incompressible. 4. Velocity is uniform over the cross section. 5. The flow is irrotational.
Description : State Bernoulli’s theorem. State any two application of it.
Last Answer : It states that in a steady, ideal flow of an incompressible fluid, the total energy at any point of the fluid is always constant. Total energy = Constant Pressure energy + ... . Practical application of Bernoulli's in following devices: i) Venturimeter ii) Orifice meter iii) Pitot tube
Description : The cause for the Tsunami, as deduced by the seismologists, is – (1) Gravitational pull of the moon (2) Low pressure trough in the ocean (3) Deformation of sea floor and vertical displacement of water (4) Sudden change in the monsoon wind
Last Answer : (3) Deformation of sea floor and vertical displacement of water Explanation: Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides, ... the sea, the water above the deformed area is displaced from its equilibrium position.
Description : The cause for the Tsunami, as deduced by the seismologists, is (1) gravitational pull of the moon (2) low pressure trough in the ocean (3) deformation of sea floor and vertical displacement of water (4) sudden change in the monsoon wind
Last Answer : deformation of sea floor and vertical displacement of water
Description : Why do you swing the ball while playing table tennis ?
Last Answer : The ball swings because of unequal pressure on the top and bottom of the ball.
Description : Which of the following is an example of simple harmonic motion? (1) Earth spinning on its axis (2) Simple pendulum motion (3) Ball bouncing on floor (4) Motion of a ceiling fan
Last Answer : Simple pendulum motion
Description : Who first explained the billiard-ball-like collisions photons make with the free electrons in a scattering material? He received the Nobel Prize in Physics in 1927 for this work.
Last Answer : ANSWER: ARTHUR HOLLY COMPTON
Description : Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan (A) With greater ... (B) Of increased diameter (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
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 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 : Pressure of air
Description : Wind rose represents – (1) wind turbulence (2) wind data (3) wind pressure (4) wind temperature
Last Answer : (1) wind turbulence Explanation: A Typhoons are common in the China Sea and along the margins of the west Pacific Ocean.
Description : A flight is to depart from an airport with runway 09 and 27. Surface wind is 270/05; an inversion is reported at 300 feet with turbulence and wind shear. The wind just above the ... throttle during the passage through the inversion d. Depart runway 27 with as steep an ascent as possible
Last Answer : b. Depart on runway 09 with a tailwind
Description : Which of the following conditions is worst with regard to wake vortex turbulence? a. Lights winds near the surface b. Strong winds near the surface c. Marked vertical wind shear d. Marked atmospheric turbulence near the ground
Last Answer : a. Lights winds near the surface
Description : Bernoulli's principle shows that, at points in a moving fluid where the potential energy change is very small A. the pressure is low where the velocity is low and similarly, the pressure is ... of the moving fluid D. pressure remain independent of the speed of the stationary fluid
Last Answer : the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low
Description : A ball is thrown horizontally from the top of a cliff. Assuming no air resistance, the acceleration of the ball while it is in flight is: w) in the vertical direction only x) in the horizontal direction only y) in the vertical and horizontal directions z) zero.
Last Answer : ANSWER: W -- IN THE VERTICAL DIRECTION ONLY
Description : If one wants to throw a cricket ball to the maximum distance, then at which angle should he throw it ?
Last Answer : – 45°
Description : A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum
Last Answer : (4) They must be dropped in vacuum Explanation: When a piece of paper and a cricket ball are dropped from the same height, they reach the surface at different time because the shape of the paper ... occurring on them and this leads to a conclusion that both the article reaches at the same time.
Description : The angle in which a cricket ball should be hit to travel maximum horizontal distance is : (1) 60° with horizontal (2) 45° with horizontal (3) 30° with horizontal (4) 15° with horizontal
Last Answer : (2) 45° with horizontal Explanation: This has to do with the equation of a parabola or trajectory which is z = (tane)x 2 cos 9) 2. We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
Last Answer : 45° with horizontal
Description : A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum
Last Answer : They must be dropped in vacuum
Description : When a person sitting on a swing stands up on the swing, the frequency of oscillation – (1) decreases (2) increases (3) becomes infinite (4) does not change
Last Answer : (2) increases Explanation: In Simple Harmonic Motion, the frequency of the oscillation (1) is the number of oscillations per second which is expressed as f = 1/T where T is the time period (the time for the oscillator to complete one cycle).
Description : When a person sitting on a swing stands up on the swing, the frequency of oscillation (1) decreases (2) increases (3) becomes infinite (4) does not change
Last Answer : increases
Description : Which one of the following cannot be explained on the basis of Mendel's law of dominance? (a) The discrete unit controlling a particular character is called a factor. (b) Out of one pair of ... any blending and both the characters recover as such in F2 generation. (d) Factors occur in pairs.
Last Answer : (c) Alleles do not show any blending and both the characters recover as such in F2 generation
Description : When a CD (Compact Disc used in audio and Video system) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of phenomenon of 1) reflection and diffraction 2) reflection and transmission 3) diffraction and transmission 4) refraction, diffraction and transmission
Last Answer : 4) refraction, diffraction and transmission
Description : Experiment to help my nephew! Which direction do you see this dancer spinning?
Last Answer : I saw that spinning counterclockwise for the first 10 or 15 seconds, then the other way around (i was doing math right before looking at it then i started reading the text and it started going the other way ... side). I'm right handed in everything except eating (i use the knife with my left hand).
Description : A fountain pen works on the principle of (1) Flow of liquids from higher to lower potential (2) Capillary action (3) Bernoulli's principle (4) Viscosity of liquids
Last Answer : (2) Capillary action Explanation: A fountain pen is a nib pen that, unlike its predecessor the dip pen, contains an internal reservoir of water-based liquid ink. The pen draws ink from the ... to flow in narrow spaces without the assistance of, and in opposition to external forces like gravity.
Description : The spring balance works on the principle of - (1) Boyle's Law (2) Hooke's Law (3) Bernoulli's principle (4) Pascal's Law
Last Answer : (2) Hooke's Law Explanation: A spring scale or spring balance or Newton meter is a type of weighing scale. It consists of spring fixed at one end with a hook to attach an object at the ... force needed to extend a spring is proportional to the distance that spring is extended from its rest position.
Description : Hydraulic brakes in automobile work on – (1) Poiseuille's principle (2) Pascal's principle (3) Archimedes' principle (4) Bernoulli's principle
Last Answer : (2) Pascal's principle Explanation:The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing glycol ethers or diethylene glycol, to transfer pres-sure from ... it travels equally in all directions so that uniform braking action is applied on all wheels.
Description : What principle/law explains the working of the hydraulic brakes in automobiles? (1) Bernoulli's law (2) Posieulli's principle (3) Pascal's law (4) Archimedes' principle
Last Answer : (3) Pascal's law Explanation: Hydraulic brakes work on the principle of Pascal's law which states that "pressure at a point in a fluid is equal in all directions in space". According to this law ... the vehicle, to the actual brake mechanism, which is usually at or near the wheel of the vehicle.