Answer:
22 N upward
Explanation:
From the question,
Applying newton's second law of motion
F = m(v-u)/t....................... Equation 1
Where F = Average force exerted by the ground on the ball, m = mass of the baseball, v = final velocity, u = initial velocity, t = time of contact
Note: Let upward be negative and downward be positive
Given: m = 0.14 kg, v = -1.00 m/s, u = 1.2 m/s, t = 0.014 s
Substitute into equation 1
F = 0.14(-1-1.2)/0.014
F = 0.14(-2.2)/0.014
F = 10(-2.2)
F = -22 N
Note the negative sign shows that the force act upward
There are 2.1077x10^24 atoms of sulfur in 3.50 mols of sulfur.
The Bohr model resembles a planetary system in which the negatively-charged electrons orbit a small and very dense, positively-charged nucleus at the atom's center.
The electrons are held in orbit by the Coulomb (electrical) force between the positively-charged nucleus and the negatively-charged electrons.
The electrons cannot occupy just any orbital radius.
Only orbits with a very specific set of energy values are permitted (which all atoms of a given element have in common and are unique to that element).
The lowest energy (or ground state) corresponds to orbit closest to the nucleus and photons with specific amounts of electromagnetic radiation are absorbed or emitted when an electron moves from one orbit to another (absorbed to move further up the permitted levels and away from the nucleus)
An atomic line spectrum is the whole range of specific photon radiation frequencies that an element can emit or absorb as it's electrons move between the energy levels allowed in those atoms.
The emissions correspond with electrons descending 'down' their energy levels, with the energy differences being carried away by photons with the appropriate frequency. Consequently an emission spectra is a series of specific, single color lines (against a black background) for each of the emitted frequencies.
Photon absorption provides the energy for electrons to 'climb' the set of energy levels for that element. So, putting electrons into higher energy states within an atom.
When the absorbed photons are removed from incident light containing the full spectrum, their absence is seen as a series of fine black lines on an otherwise continuous spectrum background.
<span>
The features in absorption and emission spectra coincide exactly for atoms of a given element. </span>
Unsaturated solution. It has more capacity to hold more solute.
This question involves the concept of Newton's Second Law of Motion.
a) The acceleration is "1 m/s²".
b) The acceleration is "1.5 m/s²".
c) The amount of force needed is "100 N".
d) The force needed is "187.5 N".
e) The force needed is "280 N".
<h3>NEWTON'S SECOND LAW OF MOTION:</h3>
According to Newton's Second Law of motion whenever an unbalanced force is applied on an object, it produces an acceleration in the object in the direction of the force itself.
Mathematically,
where,
- F = Applied Force
- m = mass of the object
- a = acceleration
a)
Here,
Therefore,
<u>a = 1 m/s²</u>
<u></u>
b)
Here,
Therefore,
<u>a = 1.5 m/s²</u>
<u></u>
c)
Here,
Therefore,
<u>a = 100 N</u>
<u></u>
d)
Here,
Therefore,
<u>a = 187.5 N</u>
<u></u>
e)
Here,
Therefore,
<u>a = 280 N</u>
<u></u>
Learn more about Newton's Second Law of motion here:
brainly.com/question/13678295
