If a bomb dropped from an airplane explodes in mid-air _______. (1) its KE increases (2) its total energy increases (3) its total energy decreases (4) its total momentum decreases

1 Answer

Answer :

(1) its KE increases Explanation: The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

Related questions

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 : 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 : A bomb, initially at rest, explodes into a large number of tiny fragments. The total momentum of all the fragments (a) Is zero (b) Is infinity (c) Depends on the total mass of all the fragments (d) Depends on the speeds of various fragments

Last Answer : Ans:(a)

Description : A model airplane flies over the ocean in level flight at an altitude of 19.6 meters. How long does it take a bomb, dropped from under the wing, to impact the water?

Last Answer : ANSWER: 2 SECONDS

Description : A bomb explodes on the moon. You will hear its sound on earth after – (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion

Last Answer : (4) You cannot hear the sound of explosion Explanation: The sound will never reach Earth because there are not enough molecules or atoms of matter per cubic centimeter of space to create the pressure waves ... Sound propagation needs a medium. The people on the Earth can see the flash, but no sound.

Description : A bomb explodes on the moon. You will hear its sound on earth after ______ (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion

Last Answer : You cannot hear the sound of explosion

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 : If the momentum of a body is tripled, its KE will -Physics

Last Answer : It becomes nine times its original value.

Description : A bomb explodes on the moon. You will hear its sound on earth after ___

Last Answer : ou cannot hear the sound of explosion 514.

Description : A spring ball of mass 0.5 kg is dropped from some height. On falling freely for 10 s, it explodes into two fragments of mass ratio 1:2.

Last Answer : A spring ball of mass 0.5 kg is dropped from some height. On falling freely for 10 s, ... m/s. Calculate the kinetic energy supplied during explosion.

Description : There are 10 bombs on the ground, 1 bomb explodes. How many bombs are there left? -Riddles

Last Answer : None. Because when that 1 bomb exploded, it caused the rest of the Bombs to explode too.

Description : A bomb explodes on the Moon. How long will it take for the sound to reach the Earth? (a) 10 s (b) 1,000 s (c) 1 day (d) None of these

Last Answer : Ans:(d)

Description : If a rock weighing 2200 N is dropped from a height of 15 m what is its KE just before it hits the ground Remember weight is measured in newtons (N) and is equal to mass times gravity.?

Last Answer : 33,000 J

Description : For those of you who have been on an airplane when oxygen masks dropped down, what were the circumstances?

Last Answer : It was very very windy and we hit the tarmac so hard upon landing that the masks fell down. I can’t remember what type of plane it was. I think it was a Wellington to Palmerston North flight, so something small-ish.

Description : Do you worry that TSAs might miss an atom bomb being carried onto an airplane by a passenger?

Last Answer : answer:No generally. Double no in this case.

Description : During the motion of a projectile fired from the earth surface, _______ (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant

Last Answer : horizontal component of its velocity remains constant

Description : Melting point of ice _______. (1) increases with increase of pressure (2) decreases with increase of pressure (3) is independent of pressure (4) None of these

Last Answer : (2) decreases with increase of pressure Explanation: The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F, 273.15 K); this is also known as the ice point.

Description : If ice floating on water in a vessel melts, the water level in the vessel _______. (1) increases (2) does not change (3) first increases before decreasing (4) decreases

Last Answer : (2) does not change Explanation: When ice floating on water in a vessel melts, the water level in the vessel does not change. This is because when floating, the ice displaces an amount of water equal to its mass, and when melted, it becomes an amount of water equal to its mass.

Description : If ice floating on water in a vessel melts, the water level in the vessel _______. (1) increases (2) does not change (3) first increases before decreasing (4) decreases

Last Answer : does not change

Description : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS 

Description : Should the US have ever dropped the Atom Bomb on Nagasaki and Hiroshima?

Last Answer : It was a disgusting act in my opinion. I do remember reading somewhere that Japan attempted surrender before hand and we declined their offer. I've no source and do not know if that is ... Innocents get killed in war, but strictly targeting civilians should be a war crime answerable only by death.

Description : The US army dropped the atomic bomb in 1945 on which cities? -History 9th

Last Answer : hiroshima and nagasakies hope this helps you

Description : In which year was the atomic bomb dropped on Japan? -General Knowledge

Last Answer : The United States detonated two nuclear weapons over the Japanese cities of Hiroshima and Nagasaki on August 6 and 9, 1945, respectively.

Description : In which year was the atomic bomb dropped on Japan? -General Knowledge

Last Answer : Bells have tolled in Hiroshima, Japan, to mark the 75th anniversary of the dropping of the world's first atomic bomb. But memorial events were scaled back this year because of the pandemic. On 6 August 1945, a US bomber dropped the uranium bomb above the city, killing around 140,000 people.

Description : In which year was the atomic bomb dropped on Japan? -General Knowledge

Last Answer : 1945 Bells have tolled in Hiroshima, Japan, to mark the 75th anniversary of the dropping of the world's first atomic bomb. But memorial events were scaled back this year because of the pandemic. On 6 August 1945, a US bomber dropped the uranium bomb above the city, killing around 140,000 people.

Description : In which year was the atomic bomb dropped on Japan? -General Knowledge

Last Answer : answer:

Last Answer : The first atomic bomb exploded during World War II in Japan's Hiroshima and Nagasaki prefectures.

Description : On August 6, 1945, the first atom bomb was dropped at

Last Answer : Hiroshima

Description : The first atom bomb was dropped on Hiroshima on a. Aug. 6, 1945 b. Aug. 9, 1945 c. Aug. 9, 1946 d. Aug. 6, 1942

Last Answer : a. Aug. 6, 1945

Description : The second atom bomb was dropped on Nagasaki on a. Aug. 6, 1914 b. Aug. 9, 1945 c. Aug. 6, 1943 d. Aug. 9, 1943

Last Answer : b. Aug. 9, 1945

Description : What was the second city the United States dropped a nuclear bomb on? 

Last Answer : Nagasaki

Description : What was the name of the B-29 bomber that dropped the first atomic bomb on Hiroshima?

Last Answer : Enola Gay

Description : Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of ... that lost by the other z) the total kinetic energy before and after the collision remains constant

Last Answer : ANSWER: Z -- THE TOTAL KINETIC ENERGY BEFORE AND AFTER THE COLLISION RE

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

Description : In elastic collisions, A. only the total momentum of the colliding objects is conserved. B. only the total kinetic energy is conserved. C. both of the momentum and total kinetic energy ... D. neither momentum of the colliding bodies nor the total kinetic energy are recoverable.

Last Answer : both of the momentum and total kinetic energy are conserved.

Description : If two different gases have the same volume, temperature, and pressure and behave like ideal gases, they will also be identical in which one of the following ways? w) average molecular velocity x) total mass y) total molecular kinetic energy z) average momentum per molecule

Last Answer : ANSWER: Y -- TOTAL MOLECULAR KINETIC ENERGY

Description : Radian per second is unit of _______. (1) Momentum (2) Moment of Inertia (3) Frequency (4) Angle Velocity

Last Answer : (4) Angle Velocity Explanation: The SI unit of angular velocity is radians per second.

Description : After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant

Last Answer : ANSWER: Z -- REMAINS CONSTANT 

Description : The velocity of sound in air – (1) decreases with increase of temperature (2) increases with decrease of temperature (3) does not depend on temperature (4) decreases with decrease of temperature

Last Answer : (4) decreases with decrease of temperature Explanation: Assuming air to be an ideal gas, the speed of sound c depends on temperature only, not on the pressure or density. As air ... to the individual air particles having extra kinetic energy at higher temperatures and lesser at lower temperatures.

Description : The velocity of sound in air (1) decreases with increase of temperature (2) increases with decrease of temperature (3) does not depend on temperature (4) decreases with decrease of temperature

Last Answer :  decreases with decrease of temperature

Description : Maximum fluctuation of energy = 1. Max KE – Min KE 2. Max KE + Min KE 3. Max KE > Min KE 4. Max KE < Min KE

Last Answer : 1. Max KE – Min KE

Description : Maximum fluctuation of energy = (A) Max. KE – Min. KE (B) Max. KE + Min. KE (C) (Max. KE – Min. KE)/2 (D) (Max. KE + Min. KE)/2

Last Answer : (A) Max. KE – Min. KE

Description : _________ the very small KE still present in molecules at absolute zero temperature.  a. internal KE  b. Atomic kinetic energy  c. Zero-Point Energy  d. Subliminal Energy

Last Answer : Zero-Point Energy

Description : The mirage is seen in a hot desert because of (a) The density of the layer of air increases with altitude (b) The density of the layer of air decreases with altitude (c) The reflection of light from the layers of sand (d) The total internal reflection from sand

Last Answer : Ans:(a)

Description : Energy in reflected light : (1) does not depends on the angle of incidence (2) increases with the increase in angle (3) decreases with the increase in angle of incidence (4) becomes maximum for angle of incidence equal to 45°

Last Answer : (2) increases with the increase in angle Explanation: Reflected waves are simply those waves that are neither transmitted nor absorbed, but are reflected from the surface of the medium they encounter. The ... depends on the nature of the surface and the angle at which the wave strikes the surface.

Description : Energy in reflected light : (1) does not depends on the angle of incidence (2) increases with the increase in angle (3) decreases with the increase in angle of incidence (4) becomes maximum for angle of incidence equal to 45° 

Last Answer : increases with the increase in angle

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? (1) Newton’s first law (2) Newton’s Second Law (3) Newton’s Third Law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Conservation of linear momentum. The principle that the linear momentum of a system has constant magnitude and direction if the system is subjected to no external force. Also called law of conservation of linear momentum

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states if no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.

Description : Total momentum within a closed system is A. increasing B. decreasing C. zero D. constant

Last Answer : constant