Description : The collision between a photon and a free electron was first explained by which of the following scientists? w) Einstein x) Heisenberg y) Compton z) Bohr
Last Answer : ANSWER: Y -- COMPTON
Description : (2) Exclusion Principle of Pauli Explanation: The Pauli exclusion principle is the quantum mechanical principle that no two identical fermions (particles with half-integer spin) may occupy the same ... function for two identical fermions is anti-symmetric with respect to exchange of the particles.
Last Answer : The three elements most needed in common fertilizers are – (1) Sulphur, Phosphorous and Sodium (2) Nitrogen, Phosphorous and Sodium (3) Phosphorous, Sodium and Nitrogen (4) Calcium, Phosphorous and Potassium
Description : “All the four quantum numbers of two electrons in an atom are not the same.” It is the law of — (1) Hund’s (2) Exclusion Principle of Pauli (3) Uncertainty Principle of Hiesenberg (4) Avogadro’s Law
Last Answer : Exclusion Principle of Pauli
Description : Which of the following scientists hypothesized that it would be possible for particles to have wave-like properties ? Was it: w) Planck x) Heisenberg y) Einstein z) de Broglie
Last Answer : ANSWER: Z -- DE BROGLIE
Description : “Each electron in an atom must have its own unique set of quantum numbers” is a statement of--------? A. Aufbau principle B. Pauli exclusion principle (Answer) C. Hund’s rule D. Periodic law
Last Answer : B. Pauli exclusion principle (Answer)
Description : Gause's principle of competitive exclusion states that (a) no two species can occupy the same niche indefinitely for the same limiting resources (b) larger organisms exclude smaller ... through competition (d) competition for the same resources exclude species having different food preference
Last Answer : (c) more abundant species will exclude the less abundant species through competition
Description : Which of the following scientists explained the photoelectric effect? Was it: w) Einstein x) Planck y) Bohr z) Chadwick
Last Answer : ANSWER: W -- EINSTEIN
Description : The random motion of particles suspended in a fluid is called: w) Boson Condensation x) Fermi Motion y) Brownian Motion z) Pauli Motion
Last Answer : ANSWER: Y -- BROWNIAN MOTION
Description : The idea that we CANNOT know both the position and velocity of a subatomic particle at the same time was formulated by: w) Einstein x) Heisenberg y) Fermi z) Schroedinger
Last Answer : ANSWER: X -- HEISENBERG
Description : "Two different species cannot occupy the same nich for long" is a statement of the: a) Hardy-Weinberg Law b) Darwin's Theory of Natural Selection c) Competitive Exclusion Principle d) Einstein's Theory of Relativity
Last Answer : ANSWER: C -- COMPETITIVE EXCLUSION PRINCIPLE
Description : Which of the following men was involved with the first controlled nuclear reaction? w) Linus Pauling x) Nelson Sartoris y) Edward Teller z) Enrico Fermi
Last Answer : ANSWER: Z -- ENRICO FERMI
Description : Who hypothesized that it would be impossible to know the exact location and exact momentum of a particle at the same time? Was it: w) Heisenberg x) De Broglie y) Planck z) Schrodinger
Last Answer : ANSWER: A -- HEISENBERG
Description : The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.
Last Answer : ANSWER: X -- DAVISSON AND GERMER
Description : The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: w) Thompson x) Bohr y) Rutherford z) Einstein
Last Answer : ANSWER: X -- BOHR
Description : Whose principle or law states that each point on a wavefront may be considered a new wave source? Is it: w) Snell's Law x) Huygen's Principle y) Young's Law z) Hertz's Law.
Last Answer : ANSWER: X -- HUYGEN'S PRINCIPLE
Description : Who is known as the Father of the Atomic Bomb? w) Albert Einstein x) J. Robert Oppenheimer y) General Leslie Groves z) Edward Teller
Last Answer : ANSWER: X -- J. ROBERT OPPENHEIMER
Description : Who is called the Father of the Nuclear Navy? w) Edward Teller x) Robert Oppenheimer y) Hymen Rickover z) Chester Nimitz
Last Answer : ANSWER: Y -- HYMEN RICKOVER
Description : Carnivorous animals lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as (a) character displacement (b) altruism (c) resource partitioning (d) competitive exclusion.
Last Answer : (c) resource partitioning
Description : My theory of electrolytic dissociation earned me t 1903 Nobel Prize in chemistry. My name is: w) Niels Bohr x) Svante Arrhenius y) Michael Faraday z) John Cavendish
Last Answer : ANSWER: X -- SVANTE ARRHENIUS
Description : When the velocity of an object is tripled, another quantity which is tripled at the same time is the object's: w) momentum x) potential energy y) kinetic energy z) mass
Last Answer : ANSWER: W -- MOMENTUM
Description : Uncertainty principle was presented by a) Dirac b)De Broglie c) Shrodinger d) W. Heisenberg
Last Answer : d) W. Heisenberg
Description : The principle that energy may be converted from one form to another but it cannot be either created or destroyed is: w) First Law of Thermodynamics. x) Second Law of Thermodynamics. y) Third Law of Thermodynamics. z) Principle of photoelectricity.
Last Answer : ANSWER: W -- FIRST LAW OF THERMODYNAMICS.
Description : How many electrons can occupy an s orbital? w) one x) two y) three z) four
Last Answer : ANSWER: X -- TWO
Description : What law describes the force between two stationary electrically charged objects? w) Ampere's law x) Coulomb's law y) Kirchoff's Rules (pron: kir-koff rules) z) Ohm's law
Last Answer : ANSWER: X -- COULOMB'S LAW
Description : If the distance between two objects, each of mass 'M', is tripled, the force of attraction between the two objects is: w) 1/2 the original force x) 1/3 the original force y) 1/9 the original force z) unchanged
Last Answer : ANSWER: Y -- 1/9 THE ORIGINAL FORCE
Description : A far-sighted person, without optical correction, is typically able to see nearby objects more clearly in bright light. The reason for this phenomena is: w) bright light provides better ... bright light causes squinting which flattens the eyeball which tends to correct the far-sighted condition.
Last Answer : ANSWER: X -- THE PUPIL OF THE EYE NARROWS WHICH INCREASES THE DEPTH OF FOCUS
Description : An object is projected vertically upward near the surface of the earth. At the very top of its path, the object's velocity is zero, and its acceleration is: w) 0 x) 9.8 meters per second squared DOWNWARD y) 9.8 meters per second squared UPWARD z) depends on the mass of the object
Last Answer : ANSWER: X -- 9.8 METERS PER SECOND SQUARED DOWNWARD
Description : An impulse of 10 kilogram-meter per second acting on an object whose mass is 5 kilogram will cause a change in the objects velocity of: w) 0.5 meters per second x) 2 meters per second y) 10 meters per second z) 50 meters per second
Last Answer : ANSWER: X -- 2 METERS PER SECOND
Description : What does the exclusion principle have to do with whether or not a star becomes a black hole? -Space
Last Answer : The Pauli exclusion principle just states how electrons normally behave, not how they behave in very extreme environments. An example of an extreme environment is inside a massive star that is collapsing. If the star ... our Sun's mass, once it starts to collapse it will end up as a black hole.
Description : The statement, "In regions where fluid velocity is smaller, the pressure is higher, and vice versa", is known as the principle of: w) Pascal x) Bernoulli y) Torricelli z) Archimedes
Last Answer : ANSWER: X -- BERNOULLI
Description : An incident ray comes in parallel to the principle axis of a concave mirror. Is it reflected: w) back along the incident ray x) at 30 degrees to incident ray y) through the focal point z) through the center of curvature
Last Answer : ANSWER: Y -- THROUGH THE FOCAL POINT
Description : What is the Heisenberg uncertainty principle?
Last Answer : The Heisenberg uncertainty principle is a fundamental principle of quantum mechanics that states that the more precisely the position of a particle is known, the less precisely its momentum can be known, and vice versa, and is an important concept in quantum mechanics.
Last Answer : The Heisenberg uncertainty principle is a fundamental principle of quantum mechanics, which states that the position and momentum of a particle cannot both be precisely known at the same time, and has many implications for the behavior of subatomic particles.
Description : Could someone explain the Heisenberg uncertainty principle from a layman's point of view?
Last Answer : Caveat: this could be completely wrong, The way it was explained to me is that it’s like trying to state where a bullet that has just been shot is located. You can tell me where it is at any given moment, you can track it, but when you point out where it is, it is gone.
Description : State Heisenberg Uncertainty Principle.
Last Answer : Ans. It is impossible to determine the exact position & exact momentum or velocity of microscopic particle.
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
Description : Which of the following scientists first stated the law of conservation of mass? Was it: w) Lavoisier x) Dalton y) Proust z) Boyle
Last Answer : ANSWER: W -- LAVOISIER
Description : Which of the following scientists was awarded the Nobel Prize in 1911 for the discovery of the radioactive elements, radium and polonium? w) John Dalton x) Dmitri Mendeleev y) Emil Fischer z) Marie Curie
Last Answer : ANSWER: Z -- MARIE CURIE
Description : Which of the following pair are vector quantities? w) time and space x) force and momentum y) energy and time z) momentum and mass e) mass
Last Answer : ANSWER: X -- FORCE and MOMENTUM
Description : How do scientists determine the sizes of objects in space?
Last Answer : Need answer
Description : In EXTRA-TERRESTRIAL SPACE, heat is transferred by: w) conduction x) convection y) conduction and convention z) radiation
Last Answer : ANSWER: Z -- RADIATION
Description : A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 c RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars? w) 0.6 c x) 0.88 c y) 1.2 c z) 1.34 c
Last Answer : ANSWER: X -- 0.88 c
Description : Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the ... 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr
Last Answer : ANSWER: Y -- 120 TORR
Description : An ELECTRON moving horizontally along the +x axis enters a region of space with a horizontal uniform magnetic field pointing in the +y direction. The electron will be deflected: w) -y direction x) +y direction y) -z direction z) +z direction
Last Answer : ANSWER: Y -- -Z DIRECTION
Description : In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the ... its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom
Last Answer : ANSWER: Y -- MOST OF THE MASS OF A GOLD ATOM IS IN ITS NUCLEUS
Description : Newton's second law states that the net force acting on a body is equal to the body's time rate of change of: w) acceleration x) mass y) momentum z) inertia
Last Answer : ANSWER: Y -- MOMENTUM
Description : For a body to be in equilibrium, which of the following conditions must exist? w) no forces may be acting on the body. x) the body must be accelerating. y) the velocity of the body must be zero. z) the sum of the forces acting on the body must be equal to zero.
Last Answer : ANSWER: Z -- THE SUM OF THE FORCES ACTING ON THE BODY MUST BE EQUAL TO ZERO.
Description : A hiker stands at the bottom of steep hill. The hiker may follow a straight line path to the top of the hill, a distance of 300 feet, or she may follow a zig-zag path to the top of the hill and walk a ... times the work going along the straight path? Is it: w) equal x) twice y) 4 times z) 8 times?
Last Answer : ANSWER: W -- EQUAL
Description : Which of the following phenomena suggest that light may be a transverse wave? w) reflection x) polarization y) photoelectric effect z) diffraction
Last Answer : ANSWER: X -- POLARIZATION
Description : Electric current may be expressed in which one of the following units? w) coulombs/volt x) joules/coulomb y) coulombs/second z) ohms/second
Last Answer : ANSWER: Y -- COULOMBS/SECOND