you can subtract the atomic number from the mass number to find the number of neutrons.
Answer:
Explanation:
Examples are;
Ultraviolet light from sun.
Heat from a stove burner.
X-ray from an x-ray machine.
Alpha particle emit from a radio active decay of uranium.
Sound waves from your stereo.
Microwave from micro oven.
ultraviolet light from a black light.
Gamma radiations from a supernova.
AND MANY MORE.
Answer:
The focal length of a lens is refers to the distance from the center of the lens to the principal foci.
B low frequency it is the lowest frequency
