Description : Surface tension in a liquid is due to : (1) Adhesive force between molecules (2) Cohesive force between molecules (3) Gravitational force between molecules (4) Electrical force between molecules
Last Answer : (2) Cohesive force between molecules Explanation: Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. This property is caused by cohesion of similar molecules, and is responsible for many of the behaviors of liquids.
Description : The strongest force in nature is – (1) Electrical force (2) Gravitational force (3) Nuclear force (4) Magnetic force
Last Answer : (3) Nuclear force Explanation: The nuclear force (or nucleonnucleon interaction or residual strong force) is the force between two or more nucleons. It is responsible for binding of protons and neutrons into atomic nuclei.
Description : The strongest force in nature is (1) electrical force (2) gravitational force (3) nuclear force (4) magnetic force
Last Answer : nuclear force
Description : Surface tension in a liquid is due to : (1) Adhesive force between molecules (2) Cohesive force between molecules (3) Gravitational force between molecules (4) Electrical force between molecules.
Last Answer : Cohesive force between molecules
Description : One kilobit is equal to_______ bits (1) 512 (2) 1000 (3) 1024 (4) 1042
Last Answer : 1024
Description : The high boiling points of alcohols, as compared to the corresponding alkanes, are due to (a) Hydrogen bonding (b) Heavy oxygen atom (c) Water solubility (d) None of these
Last Answer : Hydrogen bonding
Description : Would the gravitational force of a paper plate the size of our solar system crush someone standing at the middle of the plate?
Last Answer : answer:Well, calculate it by integration. Say, a paper plate weighs 10 gram per square meter. Do not forget that there is symmetry, so the force components parallel with the plate cancel. Calculate your integral.
Description : Explain that gravitational force is an untouchable force ?
Last Answer : The force that acts without direct contact of two objects is called untouchable force. The force of attraction between any two objects in the universe is called gravity. Touch is not required for ... solar system revolve around the sun without touching it. So the force of gravity is untouchable.
Description : A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of (1) gravitational force between train and man. (2) illusion of the man (3) the centripetal force (4) pressure difference due to fast moving air in between
Last Answer : (4) pressure difference due to fast moving air in between Explanation: When a fast-moving train passes a man standing on the platform at rest, the air between train and person also moves with ... higher pressure, and being behind the man standing close will tend to push him toward the train.
Description : Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be - (1) 2F (2) F/2 (3) 4F (4) F/4
Last Answer : (4) F/4
Description : What type of force acts on a car moving around a curve? (1) Centrifugal force (2) Cohesive force (3) Centripetal force (4) Gravitational force
Last Answer : (3) Centripetal force Explanation: Any object moving in a circle (or along a circular path) experiences a centripetal force. It is this physical force that pushes or pulls the object towards ... acting upon the turned wheels of the car provides centripetal force required for circular motion.
Description : The oil in the wick of an oil lamp rises up due to: (1) capillary action (2) low viscosity of oil (3) gravitational force (4) pressure difference
Last Answer : (1) capillary action Explanation: The oil in the wick of an oil lamp rises up due to capillary action.
Description : Fat can be separated from milk in a cream separator because of _______. (1) cohesive force (2) gravitational force (3) centripetal force (4) centrifugal force
Last Answer : (4) centrifugal force Explanation: The centrifugal separator was invented in 1897. By the turn of the century it had altered the dairy industry by making centralized dairy processing possible for the first time.
Description : The force which makes a vehicle to stop when break is applied is called – (1) gravitational force (2) vanderwalls force (3) frictional force (4) covalent force
Last Answer : (3) frictional force Explanation: A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or ... When the brakes are applied, work is done by the friction force between the brakes and the wheels.
Description : When a running car stops suddenly, the passengers tends to lean forward because of: (1) centrifugal force (2) inertia of rest (3) inertia of motion (4) gravitational force
Last Answer : (3) inertia of motion Explanation: When a running car stops suddenly, the passengers tend to lean forward due to inertia of motion. Inertia is that property of a body due to which it resists a change in its state of rest or of uniform motion.
Description : When the milk is churned vigorously the cream from it is separated out clue to – (1) Centripetal force (2) Gravitational force (3) Frictional force (4) Centrifugal force
Last Answer : (4) Centrifugal force Explanation: The separation of cream from milk is based on the fact that when liquids of different specific gravity revolve around the same centre at the same distance with the ... the lighter one. Milk consists of two liquids of different specific gravity: fat and milk serum.
Description : The weakest of all fundamental forces is – (1) Gravitational force (2) Electrostatic force (3) Magnetic force (4) Nuclear force
Last Answer : (1) Gravitational force Explanation: In particle physics, fundamental interactions (sometimes called interactive forces or fundamental forces) are the ways that elementary particles interact with one another. ... weak interaction ("weak nuclear force"), and gravitation. All are non-contact forces.
Description : Ball pen functions on the principle of : (1) Viscosity (2) Boyle's Law (3) Gravitational force (4) Surface tension
Last Answer : (4) Surface tension Explanation: The ballpoint pen is one of the most simple and yet ubiquitous devices whose function depends on surface tension. With a pen held upright, gravity and surface tension act in concert to get ink onto the ball.
Description : A falling drop of rain water ac-quires the spherical shape due to – (1) Viscosity (2) Surface Tension (3) Atmospheric pressure (4) Gravitational force
Last Answer : (2) Surface Tension Explanation: Raindrops start out as round high in the atmosphere as water collects on dust and smoke particles in clouds. But as raindrops fall, they lose their rounded ... the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.
Description : Satellite around Earth follows a circular path because A. gravitational force is parallel to velocity B. gravitational force is anti parallel to velocity C. gravitational force is perpendicular to velocity D. gravitational force is anti perpendicular to
Last Answer : gravitational force is perpendicular to velocity
Description : Weakest force in nature isA. electric force B. gravitational force C. weak force D. magnetic force
Last Answer : magnetic force
Description : Fields that act on objects with masses are A. electric fieldsB. magnetic fields C. force fields D. gravitational fields
Last Answer : gravitational fields
Description : At the fairground, the force that balances out our weight isA. centripetal force B. centrifugal force C. friction D. gravitational force
Last Answer : friction
Description : Our weight, as measured by the spring weighing machine is equivalent of A. The total gravitational force that Earth exerts on us B. The total centripetal force required to keep us moving on Earth's ... Earth exerts on us - The total centripetal force required to keep us moving on Earth's axis
Last Answer : The total gravitational force that Earth exerts on us - The total centripetal force required to keep us moving on Earth's axis
Description : In order to keep a body moving in a circle, there exists a force on it that is directed toward the center of the circle. This force is known asA. Centrifugal force B. Centripetal force C. Gravitational Force D. magnetic force
Last Answer : Centripetal force
Description : If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter
Last Answer : ANSWER: Z -- ONE QUARTER
Description : The Grand Unified Theory of the forces of nature combines three of the four forces. Which force is NOT included? w) gravitational x) electromagnetic y) weak nuclear z) strong nuclear
Last Answer : ANSWER: W -- GRAVITATIONAL
Description : In the Millikan oil-drop experiment the UPWARD force on the drop is due to the: w) gravitational and electric fields x) gravitational field and the charge on the drop y) electric field and the size of the drop z) electric field and the charge on the drop
Last Answer : ANSWER: Z -- ELECTRIC FIELD AND THE CHARGE ON THE DROP
Description : Which of the following forces is nonconservative? w) gravitational force x) electrostatic force y) sliding frictional force z) restorative force of a spring
Last Answer : ANSWER: Y -- SLIDING FRICTIONAL FORCE
Description : Two steel balls are at a distance S from one another. As the mass of ONE of the balls is doubled, the gravitational force of attraction between them is: w) quartered x) halved y) doubled z) quadrupled
Last Answer : ANSWER: Y -- DOUBLED
Description : The force which makes a vehicle to stop when break is applied is called (1) gravitational force (2) vanderwalls force (3) frictional force (4) covalant force
Last Answer : frictional force
Description : A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of __________ . (1) gravitational force between train and man (2) illusion of the man (3) the centripetal force (4) pressure difference due to fast moving air in between
Last Answer : pressure difference due to fast moving air in between
Description : Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be
Last Answer : 1F/4
Description : When the milk is churned vigorously the cream from it is separated out due to (3) Centripetal force (2) Gravitational force (3) Frictional force (4) Centrifugal force
Last Answer : Centrifugal force
Last Answer : capillary action
Last Answer : inertia of motion
Description : Fat can be separated from milk in a cream separator because of: (1) Cohesive force (2) Gravitational force (3) Centripetal force (4) Centrifugal force
Description : When milk is churned, the cream separates from it due to: (1) Frictional force (2) Centrifugal force (3) Gravitational force (4) Viscous forces
Description : Ball pen functions on the principle of : (1) Viscosity (2) Boyle’s Law (3) Gravitational force (4) Surface tension
Last Answer : Surface tension
Description : The weakest of all fundamental forces is (1) Gravitational force (2) Electrostatic force (3) Magnetic force (4) Nuclear force
Last Answer : Gravitational force
Description : A falling drop of rain water acquires the spherical shape due to (1) Viscosity (2) Surface Tension (3) Atmospheric pressure (4) Gravitational force
Last Answer : Surface Tension
Description : If the distance between the earth and the sun were twice what it is now, the gravitational force exerted on the earth by the sun would be (a) twice as large as it is now (b) four times as large as it is now (c) half of what it is now (d) one-fourth of what it is now
Last Answer : Ans:(d)
Description : The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time (in seconds) would be required for the car to accelerate from rest to 56.3 miles per hour?
Last Answer : I think the Fluther policy is not to help students with their homework, but I always hate this kind of problem and it seems to me that the g is just in there to provide some background and to confuse you.
Description : Alpha particle is the nucleus of an atom of – (1) Lithium (2) Hydrogen (3) Helium (4) Oxygen
Last Answer : (3) Helium Explanation: Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus, which is generally produced in the process of alpha decay.
Description : In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie? (1) Visible (2) Infrared (3) Ultraviolet (4) X-ray
Last Answer : (3) Ultraviolet
Description : An a-particle is _____. (1) A hydrogen molecule (2) A helium nucleus (3) An atom of hydrogen (4) A proton
Last Answer : (2) A helium nucleus Explanation: Alpha particle, positively charged particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together.
Description : Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be - (1) 2 (2) 6 (3) 5 (4) 3
Last Answer : (2) 6 Explanation: Number of spectral lines from a state n to ground state is = n (n-1)/2 =4(4-1)/2 =12/2 =6
Description : A proton is identical to _____. (1) the nucleus of helium (2) the nucleus of a hydrogen atom (3) an alpha-particle (4) a beta particle
Last Answer : D. a beta particle