Answer:
d. Atoms are rearranged.
Explanation:
In a chemical reaction, what happens is that atoms are simply rearranged when the process takes place.
According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but atoms are simply rearranged".
Therefore:
- Atoms are not created
- Atoms are not destroyed
- Atoms are simply rearranged.
-- A moving magnetic field creates an electric field.
and
-- A moving electric field creates a magnetic field.
Answer:
Explanation:
We have an uniform circular motion, therefore, the pebble’s speed is given by the distance traveled in a revolution 
and the period (T), since this is the time pebble’s takes to complete a revolution:
The period is inversely proportional to the frequency:
So, we have:
Recall that the radius is the half of the diameter and one revolution per is equal to one Hz:
The centripetal acceleration is defined as:
Answer:
I think its c
Explanation:
I hope this helps u and u get it right :D
Answer:
The correct answer is option '5': The type of metal from which the plate is made.
Explanation:
According to the principle of photoelectric effect we know that electron's are only emitted from a surface of metal if the frequency of the light is larger than a threshold frequency that depends on the metal and is known as threshold function of the metal. The ejection of the electrons is independent of intensity of the incident light meaning any light of frequency lower than work function will not eject electrons from the metal no matter whatever the intensity of the light, or the surface area or thermal conductivity, time of illumination.
