Description : (2) it is lighter than air Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass ... elements combined. A well-known but minor use is as a lifting gas in balloons and airships
Last Answer : Ammonial is a mixture of – (1) aluminium powder and ammonium nitrate (2) aluminium powder and ammonium chloride (3) aluminium powder and ammonium sulphate (4) aluminium powder and potassium nitrate
Description : If the plates of capacitor are oppositely charged then the total charge is equal to A. negative B. positive C. zero D. infinite
Last Answer : zero
Description : A firecracker is placed in the middle of a cluster of stationary billiard balls. The firecracker-billiard ball system sits on a frictionless surface. As the firecracker explodes, the balls scatter. What is the momentum ... to the combined speed of the balls y) equal to the mass of the balls z) zero
Last Answer : ANSWER: Z -- ZERO
Description : What happens as the Universe nears absolute zero?
Last Answer : I am going to speculate here and say that advanced aliens that have mastered the technology of utilising zero point energy will use that energy to keep the universe going, by flying around and creating ... singularity to cause another big bang. Hell, these aliens might even be you damn dirty apes.
Description : Entropy of the universe is - (1) continuously increasing (2) continuously decreasing (3) zero (4) constant
Last Answer : (1) continuously increasing Explanation: In an irreversible process, entropy always increases, so the change in entropy is positive. The total entropy of the universe is continually increasing.
Description : Mark correct option related to unpaid and insufficiently paid airmail articles a) In case letters, cards and aerogrammes if postage paid least 75% of the surcharge(letter) or combined charge (PC& ... will be dispatched through surface. c) The charge collected from addressee at the time of delivery
Last Answer : d) All of the above are correct
Description : If charge stored on plates of capacitor is large, then capacitance will be A. small B. large C. zero D. infinite
Last Answer : large
Description : If charge is placed at infinity, it's potential is A. zero B. infinite C. 1 D. -1
Description : If we have a positive and a negative charge, then force between them is A. positive B. negative C. zero D. infinite
Last Answer : . negative
Description : The magnitude of the quarks' electric charge is: w) zero. x) greater than the electron's charge. y) equal to the electron's charge. z) less than the electron's charge.
Last Answer : ANSWER: Z -- LESS THAN THE ELECTRON'S CHARGE.
Description : Ten coulombs of charge are placed on a solid copper sphere. Once the charge has come to rest, the ELECTRIC POTENTIAL inside the sphere is found to be: w) zero x) uniform inside the sphere and ... the sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared
Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC POTENTIAL ON THE SURFACE OF THE SPHERE
Description : Ten coulombs of positive charge are placed on an irregularly-shaped, solid piece of copper. Once the charge has stopped moving, the electric field inside the copper is: w) zero x) changes as one ... squared y) becomes smaller as you approach the center z) becomes larger as you approach the center
Last Answer : ANSWER: W -- ZERO
Description : Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is found to be: w) zero x) uniform ... sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared.
Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC OTENT
Description : In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at (A) Less loaded column (B) More loaded column (C) A point of the maximum shear force (D) A point of zero shear force
Last Answer : Answer: Option D
Description : Will the universe ever find its zero point energy state?
Last Answer : I’m not sure what you mean by a ground state.
Description : Is absolute zero really the lowest possible temperature everywhere in the universe?
Last Answer : Zero Point Energy implies that 0 Kelvin may not be the true lower limit.
Description : Pick out the wrong statement. (A) The net change in entropy in any reversible cycle is always zero (B) The entropy of the system as a whole in an irreversible process increases (C) The ... to a maximum (D) The entropy of a substance does not remain constant during a reversible adiabatic change
Last Answer : (D) The entropy of a substance does not remain constant during a reversible adiabatic change
Description : In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons
Last Answer : ANSWER: Y -- THE NUMBER OF PROTONS
Description : The neutrons in an atom: w) are part of the nuclear charge x) rotate about the nucleus in elliptical orbits y) vary in number with different isotopes z) are always equal in number to the total number of protons
Last Answer : ANSWER: Y -- VARY IN NUMBER WITH DIFFERENT ISOTOPES
Description : In severe winter, in cold countries water pipes burst because – (1) Water expands on freezing (2) Contraction of water pipes (3) High atmospheric pressure (4) Combined effect of all the above three
Last Answer : (1) Water expands on freezing Explanation: Most liquids have a quite simple behavior when they are cooled (at a fixed pressure): they shrink. The liquid contract as it is cooled; ... substance solidifies, which causes it to contract some more because crystalline solids are usually tightly packed.
Description : Atomic power plant works on the principle of – (1) Fission (2) Fusion (3) Thermal combustion (4) Combined effect of all the above three
Last Answer : (1) Fission Explanation: A nuclear power plant is a facility at which energy released by the fissioning of atoms is converted to electrical energy under strictly regulated operating conditions. The major ... power plants except that the coal or oil fired boiler is replaced by a nuclear reactor.
Description : Mass and velocity are combined to give A. angular momentum B. equilibrium C. acceleration D. linear momentum
Last Answer : linear momentum
Description : Combined resistance of 5 Ω and 10 Ω is equal to A. 10 Ω B. 16 Ω C. 15 Ω D. 20 Ω
Last Answer : 15 Ω
Description : Three resistances 20 Ω, 30 Ω and 60 Ω are connected in parallel, their combined resistance is given by A. 110 Ω B. 50 Ω C. 20 Ω D. 10 Ω
Last Answer : 10 Ω
Description : Combined effect of several forces is known as A. net force B. resultant force C. normal force D. weight
Last Answer : resultant force
Description : Combined capacitance is equal to the A. sum of all capacitance of capacitors B. product of all the capacitance C. difference between the capacitors D. average capacitance of capacitors
Last Answer : sum of all capacitance of capacitors
Description : A 10 kilogram body initially moving with a velocity of 10 meters per second makes a head-on collision with a 15 kilogram body initially at rest. The two objects stick together. What is the velocity of the combined system just after the collision?
Last Answer : ANSWER: 4 METERS PER SECOND
Description : Atomic power plant works on the principle of (1) fission (2) fusion (3) thermal combustion (4) combined effect of all the above three
Last Answer : fission
Description : In severe winter, in cold countries water pipes burst because (1) water expands on freezing (2) contraction of water pipes (3) high atmospheric pressure (4) combined effect of all the above three
Last Answer : water expands on freezing
Description : Nintendo owns two of the most popular gaming franchises ever. The net worth of these 2 franchises equals the combined total of the remaining eight franchises in the top 10. What are they? -Gaming
Last Answer : NEED ANSWER
Description : Three resistors of `1 Omega, 2 Omega " and " 3 Omega` are combined in series. (i) What is the total resistance of the combination ? (ii) If the combin
Last Answer : Three resistors of `1 Omega, 2 Omega " and " 3 Omega` are combined in series. ( ... resistance, obtain the potential dropo across each resistor.
Description : If the total mass of the product in this chemical reaction is 14g what must the combined masses of the reactants be?
Last Answer : 4
Description : The combined effect of inductive reactance, capacitive reactance, and resistance in an AC series circuit is known as _____________. A. reactance B. total reactance C. impedance D. resonance
Last Answer : Answer: C
Description : Emphysema is described as: a) A disease of the airways characterized by destruction of the walls of overdistended alveoli. Emphysema is a category of COPD. b) A disease that results in ... disease described. d) Chronic dilatation of a bronchus or bronchi Bronchiectasis is the condition described.
Last Answer : a) A disease of the airways characterized by destruction of the walls of overdistended alveoli. Emphysema is a category of COPD.
Description : The ratio of marks obtained by Vinod and Basu is 6:5. If the combined average of their percentage is 68.75 and their sum of the marks is 275, find the total marks for which exam was conducted. A) 150 B) 200 C) 400 D) 450 E) None
Last Answer : Answer: B The sum of the marks=6x+5x=11x But the sum of the marks is given as 275=11x. We get x=25x=25 therefore, Vinod's marks is 6x=1506x=150 and Basu's marks = 5x=125. ... Therefore, if their combined average of their percentage is 137.5 then the total marks would be 137.568.75 100=200
Description : The work done by the string of a simple pendulum during one complete oscillation is equal to (1) Total energy of the pendulum (2) Kinetic energy of the pendulum (3) Potential energy of the pendulum (4) Zero
Last Answer : (4) Zero Explanation: Work done by the string of the simple pendulum during one complete oscillation is zero. Tension in the string exactly cancels the component parallel to the string. This leaves a net restoring force back toward the equilibrium position as equal to zero.
Description : A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments – (1) is zero (2) depends on the total mass of all the fragments (3) depends on the speeds of various fragments (4) is infinity
Last Answer : (1) is zero Explanation: In an explosion, an internal impulse acts in order to propel the parts of a system (often a single object) into a variety of directions. After the explosion, the individual parts of the system (that is often a collection of fragments from the original object) have momentum.
Description : Total momentum within a closed system is A. increasing B. decreasing C. zero D. constant
Last Answer : constant
Description : If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is A. elastic B. inelastic C. conserved D. not conserved
Last Answer : inelastic
Last Answer : Zero
Description : A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments (1) is zero (2) depends on the total mass of all the fragments (3) depends on the speeds of various fragments (4) is infinity
Last Answer : is zero
Description : Is the universe a perpetual motion machine?
Last Answer : I don’t think so because there is a loss of energy due to entropy. I’m not a physicist, and I very much could be wrong about this.
Description : Planck's universe, cube or sphere?
Last Answer : The problem with spheres is they don’t pack tightly together; they leave odd spaces in between which presumably cannot be smaller than the Planck length.
Description : Cosmology: Why do we think that the universe is expanding right now?
Last Answer : To assume the universe is expanding, is to ascribe limitations to the universe.
Description : Can the universe function without quantum mechanics?
Last Answer : It seems to me that the universe exists with what it exists with and we either discover its rules or we don’t. Or maybe I’m not understanding the question fully, which is entirely possible.
Description : Imagination test: What do you imagine an alternative universe wold look like?
Last Answer : That’s easy: Bizarro World.
Description : What are your thoughts on gauge invariance? do you think it works in the universe like it works in the lab, in giving us a better understanding of the universe ?.
Last Answer : I would say I have none, as I don’t know what it is.
Description : Could scientists perfectly simulate the entire universe in a computer, down to the last atom? -Physics
Last Answer : No. Even with an incredibly powerful computer, scientists could never perfectly simulate the entire universe in a computer. There are a few reasons for this. 1. The universe is non- ... this event because of our fundamentally limited knowledge of the current state of the entire universe.
Description : What is the theory of physics about the mystery of the creation of the universe called model ?
Last Answer : The theory of physics about the mystery of the creation of the universe is called the 'standard model'.
Description : Who discovered that all the galaxies in the universe are moving away from each other ?
Last Answer : Scientist Hubble discovered the subject in 1924 .