The word momentum means mass and velocity taken together.
Mass is an intrinsic basic physical quantity which tells us about the amount of matter contained in a body. It is a scalar quantity and it is measured in kilogram(Kg).
Velocity is the rate of change of displacement . It is defined as displacement per unit time. It is a vector quantity and measured in meter per second (m/s)
The product of mass and velocity is momentum. When a body possesses both mass and velocity we say that it has momentum. It is a vector quantity. Its unit is kg m/s
Mathematically we write momentum as,
P = mv
Mathematically we write momentum a
Where, P = momentum
m = mass
v= velocity.
When a force is applied on a body, it changes its momentum. The relationship between force and momentum is given by Newton's second law of motion which states that the rate of change of momentum is directly proportional to the force applied,
F = Δp /Δt
Where F= force
Δp = change in momentum
Δt = time taken for the change in momentum to occur.
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Answer:
In my mind when I hear the word momentum it comes that it is the product of mass and velocity.
B. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
C. Metals tend to have a negative valence and tend to be electron borrowers.
D. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom
Answer:
A
Explanation:
Answer:
the force of adhesion.
Explanation:
The attractive force between the two types of molecules is called adhesive force.
So, the force between the liquid molecule and the solid molecule is adhesive in nature.
The attractive force acts between the two same type of molecules is called cohesive force.
5.0 J
B.
6.5 J
C.
10.0 J
D.
12.5 J
c. cubic meter.
b. metric ton.
d. meter.
Answer: The correct answer is option a.
Explanation:
Basic unit to measure mass is defined as the unit which is commonly used to measure the mass of an object.
From the given options,
Option a: Grams is a unit which is used to measure mass and it is the commonly used unit.
Option b: Cubic meter is the unit which is used to measure the volume of an object.
Option c: Metric ton is a unit which is used to measure the mass of an object but this unit is not commonly used. hence, this is not basic unit to measure mass.
Option d: Meter is the unit which is used to measure length.
From the above information, the correct answer is option a.
B. a liquid.
(C. a solid.)
D. a vacuum.
I answered C and it's not correct so i dont know what else it could be please help
Sound waves can't travel through a vacuum. The correct option is D.
Sound waves are mechanical waves that require a medium to propagate. They travel through the vibration and interaction of particles within a medium. Now let's analyze why the other options are not true:
A) An elastic material: Sound waves can travel through elastic materials such as rubber, steel, or any other solid material. In fact, solids are one of the best conductors of sound due to the close arrangement and strong intermolecular forces between their particles.
B) A liquid: Sound waves can travel through liquids such as water, oil, or any other fluid. In liquids, the particles are loosely bound, allowing them to transmit sound waves through their vibrations.
C) A solid: Sound waves can also travel through solids. As mentioned earlier, solids are excellent conductors of sound due to the tight arrangement and strong intermolecular forces between their particles. The particles of a solid can transmit sound waves through their vibrational motion.
D) A vacuum: Sound waves cannot travel through a vacuum, which is an empty space devoid of any matter or particles. Since sound waves require a medium to propagate, a vacuum, by definition, lacks the necessary particles for sound wave transmission. In a vacuum, there are no particles to vibrate and transmit the sound waves, thus making it impossible for sound to travel.
Therefore, sound waves require a medium for propagation, and they cannot travel through a vacuum. They can travel through solids, liquids, and elastic materials where particles are present to transmit wave energy.
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