PLEASE HURRY I NEED HELP! Studying the solar system helps scientists learn about the universe. Why might a scientist use a model to represent the solar system?
A. The actual solar system is too large.
B. The actual solar system moves too slowly.
C. The actual solar system is too small.
O
D. The actual solar system is too simple.

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

What happens to an isotope during radioactive decay?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?