The correct answer is the last one:
A and C are different elements, while D is an isotope of C.
In fact, A and C are different elements, because they have a different number of protons in the nucleus (A has 3 protons, while C has 4 protons). Instead, D and C are the same element (they both have 4 protons in the nucleus), but they are different isotopes since they have a different number of neutrons (D has 4 neutrons while C has 3 neutrons)
Answer: 2.1 × 10^7 m/s
Explanation:
Please see the attachments below
Answer:
wave A
Explanation:
shortest wavelength carry the most energy
more energy in a wave, the higher its frequency. The lower the frequency is, the less energy in the wave.
Actually its three way
Neutrons
Electrons
protons
Answer:
Explanation:
density of the solid box material =
density of the liquid material =
Given that
solid box floats with two thirds of its volume submerged in a liquid
let V be the volume of the box
then,
⇒
so, the ratio of densities of solid and and the liquid is 2/3