The correct answer describes Newton's second law of motion : A. Force = mass x acceleration (F=m.a)
<h3>Further explanation </h3>
Newton's 2nd law states that :
<em>the acceleration from the applied force is proportional to the resultant force and inversely proportional to the mass </em>
Can be formulated
or
F = force, N
m = mass, kg
a = acceleration, m/s²
<h3>
Answer:</h3>
1.54 × 10^-24 J
<h3>
Explanation:</h3>
- A microwave is an example of an electromagnetic wave which travels with the speed of light.
We are given;
The wavelength of microwave as 12.9 cm
But, 100 cm = 1 m
Therefore, the wavelength = 0.129 m
- To calculate the energy of the wave we use the formula, E = vh, where v is the frequency and h is the plank's constant, 6.626×10^-34 J-s
- But, v = c/λ, where λ is the wavelength and c is the speed of light, 2.998×10^8 m/s.
Therefore;
E =(c/λ)h
= (2.998×10^8 m/s÷0.129)×6.626×10^-34 J-s
= 1.54 × 10^-24 J
Therefore, the energy of one photon is 1.54 × 10^-24 J
Answer:
Nuculear Reactions, produce energy
Explanation:
<h3><u>Answer;</u></h3>
(NH4)2S
<h3><u>Explanation;</u></h3>
- Ammonium sulphide, (NH4)2S, is an unstable compound, and in aqueous solution it exists as ammonia (NH4OH) and ammonium hydrosulphide, NH4HS.
- it is a highly water-soluble compound and produces the foul-smelling gas h2s when the solution is acidified.
- The anions; cl-, br-, i-, so42-, co32-, po43-, oh-, or s2- are not precipitated by (NH4)2S, but are precipitated by salts such as barium and silver nitrate.