Description : As we climb up the mountain the atmospheric pressure __________. a)decreases b)increases c)remains same d)none
Last Answer : a)decreases
Description : When a potter makes pots of different size and shape from kneaded clay. This change in shape and size is due to ________. a) force b)pressure c)area d)direction
Last Answer : a) force
Description : Pressure is inversely proportional to _______. a) force b) thrust c)surface area d)time
Last Answer : c)surface area
Description : A ball rolling along the ground, gradually slows and finally stops due to _______force. a) muscular b)frictional c)gravitational d)magnetic
Last Answer : b)frictional
Description : A hydrogen filled balloon rises in air because (a) The atmospheric pressure decreases with altitude (b) The acceleration due to gravity decreases with altitude (c) The density of air decreases with ... The buoyant force exerted by the air on the balloon is greater than the weight of the balloon
Last Answer : Ans:(d)
Description : Normal force exerted per unit area by gas on walls of container is A. temperature B. energy C. pressure D. friction
Last Answer : pressure
Description : Rain drops falling through atmospheric air attain limited terminal velocity, because of (A) Upward thrust due to air (B) Viscous force exerted by air (C) Surface tension effects of water (D) Force of gravity
Last Answer : Option B
Description : Atmospheric pressure exerted on the earth is due to the _____ A. Rotation of the Earch B. Revolution of the earth C. Grasvitational pull D. Uneven heating of the earth
Last Answer : ANSWER: C
Description : Atmospheric pressure exerted on earth is due to : (1) rotation of earth (2) revolution of earth (3) gravitational pull (4) uneven heating of earth
Last Answer : (3) gravitational pull Explanation: The atmosphere is made up of gasses. Gasses are physical substances, and all physical substance has weight. The atmosphere is 25 miles thick, and that 25 miles ... square inch because of the gravitational pull. That's how atmosphere exerts pressure on the earth.
Description : A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If the atmospheric pressure is assumed to be 100 kPa and thickness of the tank walls is assumed to be negligible, the force exerted by ... of water is A. 20 kN B. 50 kN C. 100 kN D. 200 kN
Last Answer : 200 kN
Last Answer : gravitational pull
Description : If the force exerted on an object is zero then the object will remain stationary- Explain ?
Last Answer : Zero force applied to an object means that the value of acceleration in it is zero. And since acceleration is needed to move a stable object, zero value of acceleration means that the object will remain stationary.
Description : It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of-----? A. An equal and ... B. of the height of a man C. of gravity D. Earth pulls the man upward E. None of these
Last Answer : A. An equal and opposite pressure acts from inside (Answer)
Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C
Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C
Description : Why does liquid does not fill the container completely in which it is kept ? -Science
Last Answer : A liquid does not fill its container completely because its particles are held fairly strongly by the interparticle forces and hence cannot leave the body of the liquid to fill the whole container.
Description : Choose the wrong statement (A) The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface (B) The horizontal component ... above the area (D) The vertical component passes through the center of pressure of the volume
Last Answer : Answer: Option D
Description : Pick up the incorrect statement from the following: (A) Free surface ground water is subjected to atmospheric pressure (B) Water table surface rises and falls with seasons (C) ... directly proportional to the rate of drawl of water (D) Level of water table remains stationary
Last Answer : (D) Level of water table remains stationary
Description : Pick out the wrong statement. (A) The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system (B) Entering velocity of the liquid in ... a multiple effect evaporation system, the number of effects is limited by the total boiling point rise
Last Answer : (C) Duhring's plot is used for calculating the concentration of solution
Description : Pressure exerted by fully saturated air, is known (A) Partial pressure (B) Saturation pressure (C) Saturation vapour pressure (D) Both (c) and (d) of the above
Description : Pressure exerted by a liquid depends upon its (A) Surface tension (B) Density (C) Viscosity
Description : For a body floating in a liquid the normal pressure exerted by the liquid acts at A) Bottom surface of the body (B) C.G. of the body (C) Metacentre (D) All points on the surface of the body
Description : The pressure exerted by A. The sewage when running full from inside, is called internal pressure B. The internal pressure if any, causes tensile stress in the pipe material C. Pressure sewers are designed to be safe in tension D. All the above
Last Answer : ANS: D
Description : Why camphor disappears when kept on a plate? (a) It sublimes (b) It reacts with the metal of the container (c) It reacts with the gases of the air (d) None of the above
Last Answer : Ans:(a)
Description : What does the value of pressure in a point of a fixed liquid in a container not depend on ?
Last Answer : The value of pressure at any point of a fixed liquid in a container does not depend on the area of the container.
Description : What liquid can I pour into a container to turn what’s inside into a crystal?
Last Answer : I remember seeing an IG video where a guy poured some liquid into a mason jar that had some stuff inside and it solidified and he carved it to look like a crystal. What is the liquid and is it publicly available?
Description : The power brake may be exerted by A. Electrical energy B. Engine vacuum C. Air pressure D. All of the above
Last Answer : A. Electrical energy
Description : If a substance is kept at atmospheric pressure what is its phase of matter completely depend on?
Last Answer : Need answer
Description : LPG when brought to atmospheric pressure & temperature will be a (A) Liquid lighter than water (B) Liquid heavier than water (C) Gas lighter than air (D) Gas heavier than air
Last Answer : (D) Gas heavier than air
Description : Which one of the following statements is correct ? a) For water at 100o Celsius at sea level, the vapour pressure is equal to atmospheric pressure b) Surface energy (or tension) is caused by ... it both in static and in dynamic conditions d) Air is 50,000 times more compressible than water
Last Answer : c) Viscosity of a fluid is the property exhibited by it both in static and in dynamic conditions
Description : Pick out the wrong statement. (A) In a static mass of liquid, the pressure at a point is the same for all liquids (B) Pressure decreases exponentially with elevation in an isothermal atmosphere (C) ... s law, the pressure at a point in a static or uniformly moving fluid is equal in all directions
Last Answer : (A) In a static mass of liquid, the pressure at a point is the same for all liquids
Description : Pick up the correct definition from the following: (A) The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil (B ... the back fill, is known as 'earth pressure at rest of the soil (D) All the above
Description : Inside an aeroplane flying at a high altitude, (a) the pressure is the same as that outside (b) normal atmospheric pressure is maintained by the use of air pumps (c) the pressure inside is less than the pressure outside (d) normal humidity and partial vacuum are maintained
Last Answer : Ans:(b)
Description : Radioactive materials should be kept in the container made of : (1) Fe (2) Al (3) Pb (4) Steel
Last Answer : (4) Steel Explanation: Radioactive materials are first encased in resin or concrete and sealed in steel drums. The drums are then packed into concrete casks and placed in concrete trenches up to 18 metres deep.
Description : Give reason: Water kept in porcelain container will not get cooled if it is glazed.
Last Answer : Glazing plugs the pores present in porcelain articles. If pores are present, water oozes from these pores and gets evaporated. This has a cooling effect on the water inside, As the pores are plugged, water does not get evaporated hence no cooling.
Description : A fluid is a substance, that (A) Has to be kept in a closed container (B) Is almost incompressible (C) Has zero shear stress (D) Flows when even a small shear is applied to it
Last Answer : (D) Flows when even a small shear is applied to it
Last Answer : Steel
Description : What happens if pressure is applied to any part of the liquid contained in the container ?
Last Answer : If pressure is applied to any part of the liquid contained in the container, pressure will be applied evenly on all sides of the substance.
Description : Surface tension of liquids is the result of which the following: w) interaction of a liquid with its container x) unbalanced forces on the liquid's surface molecules y) adhesive forces of the liquid z) interaction of the liquid's surface molecules and the applied pressure
Last Answer : ANSWER: X -- UNBALANCED FORCES ON THE LIQUID'S SURFACE MOLECULES
Description : If 4 moles of gas are added to container that already holds 1 mole of gas the pressure inside the container due to the change in the amount of gas?
Last Answer : 5 moles
Description : In IEEE 802.11, astation with ________ mobility iseither stationary (not moving) or moving only insidea BSS. A) no-transition B) BSS-transition C) ESS-transition D) none of the above
Last Answer : no-transition
Description : For winds that last six hours or more, such as a midlatitude storm, the air movement is modified by which causes the air to be deflected to . (a) Hydrostatic Force; the right in the ... c) Friction; the left in the Northern Hemisphere (d) Coriolis Force; the left in the Northern Hemisphere
Last Answer : (b) Coriolis Force; the right in the Northern Hemisphere
Description : Air bladder in fish acts as : (1) Accessory respiratory organ (2) Hydrostatic organ (3) Both accessory respiratory organ and hydrostatic organ (4) Primary respiratory organ
Last Answer : Hydrostatic organ
Description : I would need the correct answers to these examples: 1, What pressure is under the heels of women's pumps? The area of one heel is 1cm2. When calculating, assume that a woman in pumps weighs 60 ... vessels is h = 20 cm. Determine the magnitude of the hydrostatic pressure at the bottom of vessel B.
Last Answer : Need Answer
Description : The hydrostatic pressure developed due to the accumulation of water absorb by the root is called root pressure.
Last Answer : Ans. Root pressure
Description : The hydrostatic pressure generated within the cell against cell wall as a result of entry of water into it, due to osmosis.
Last Answer : Ans. Turgor pressure
Description : Which of the following statement(s) is/are true concerning water movement across cell membranes? a. Water moves only actively through cell membrane transport proteins b. For most cells of ... cells such as the glomerulus of the kidney actively transport water to maintain hydrostatic pressure
Last Answer : Answer: b, c The energetics of water transport across cell membranes is simplified by the fact that water moves only passively due to gradients of hydrostatic pressure or water ... water is distributed at equilibrium. Water distribution is determined entirely by solute to solute distribution
Description : Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is ... (c) A is true but R is false (d) A is false but R is true
Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A
Description : For hydrostatic lubrication (A) There should be relative motion between the surfaces of the journal and the bearing and wedge shaped clearance space (B) There should be external source like pump to ... be elastic deformation of the parts in contact (D) There should be metal to metal contact
Last Answer : (B) There should be external source like pump to supply lubricant under pressure
Description : In hydrostatic bearings (A) The Oil film pressure is generated only by the rotation of the journal (B) The oil film is maintained by supplying oil under pressure (C) Do not require external supply of lubricant (D) Grease is used for lubrication
Last Answer : (B) The oil film is maintained by supplying oil under pressure
Description : For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure does not fail (a) Firstly Maximum Principal Theory (b) Secondly Maximum Shear Stress Theory (c) Thirdly Maximum Principal Energy Theory (d) None
Last Answer : (a) Firstly Maximum Principal Theory