Ionic bond: it is also called "electrovalent bond". It is "a type of chemical bond that can often form between metal and non-metal ions through electrostatic attraction";
Covalent bond is a form of chemical bonding, "characterized by the sharing of pairs of electrons between atoms, or between atoms and other covalent bonds";
Metallic bond: "the chemical bond, which is characteristic of metals, in which mobile valence electrons are shared among atoms in a usually stable crystalline".
Answer:
a)Taking into consideration Newton’s second law, we know that
Net_Force = mass * acceleration
Since the box is pulled at constant speed, the acceleration is equal to zero.
This means that
Net_Force = 0 N
b) Force of friction
The net force is equal to the sum of all forces,
Net_Force = Force_applied - Friction
We found that Net_Force = 0, which means
Friction = Force_applied = 48 N
c) If the box comes to a stop. And the applied force becomes zero, the friction force becomes also zero.
Friction = 0 N
Answer:
a chemical reaction in the form of symbols
Explanation:
1. Displacement = 50 m North. Distance = 150m
Displacement is a vector. Distance is a scalar.
2. Displacement is 100 miles East.
Answer:
The correct answer is
1. KE Increases, PE Increases, ME Increases
Explanation:
Here, it is essential to define the following concepts.
Kinetic energy is the energy due to motion of an object. The definition of kinetic energy is the energy to accelerate a body from rest to a given velocity. The body retains the kinetic energy as it maintains the attained velocity
KE= 1/2mv^2
From the above definition KE is increasing
Potential energy is the energy stored within a body due to its location in a position or location of higher potential
As an object moves up to higher altitude in a direction opposite to the earth's attractive force, its gravitational potential increases
PE=mgh
From the above definition PE is increasing
Mechanical energy is the sum of potential and kinetic energies that can be used to do work. It is the sum of the potential and kinetic energies stored in the body
ME = PE+KE
Since both PE and KE are increasing then ME is also increasing
