Answer:
3) Ep = 13243.5[J]
4) v = 17.15 [m/s]
Explanation:
3) In order to solve this problem, we must use the principle of energy conservation. That is, the energy will be transformed from potential energy to kinetic energy. We can calculate the potential energy with the mass and height data, as shown below.
m = mass = 90 [kg]
h = elevation = 15 [m]
Potential energy is defined as the product of mass by gravity by height.
This energy will be transformed into kinetic energy.
Ek = 13243.5 [J]
4) The velocity can be determined by defining the kinetic energy, as shown below.
Answer: Electron affinity increases on moving across a period.
Explanation:
When an electron is added to a neutral atom to convert it into a negative ion, the tendency is known as electron affinity.
Smaller is the size of an atom more readily an electron will be gained by it because of strong force of attraction exerted by its nucleus towards the electron.
As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom.
Also, size of atoms decreases from left to right in a periodic table, thus tendency to gain electrons will also increase on moving from left to right.
So, on moving across a period, there will be an increase in electron affinity.
Answer:
These are some of the characteristics of ASD:
problems with social interaction with others. ...
unusual interest in objects.
need for sameness.
great variation in abilities.
under or over reaction to one or more of the five senses: sight, touch, taste, smell, or hearing.
repeated actions or body movements.
Explanation:
hope this helps
Answer:
hey friend,
an element becomes a positively charged ion when it <em>loses electrons</em>