Add two east-west and two north-south forces to the Force Diagram in order for the 4.0-kg object to have a southward acceleration of
3.0 m/s/s.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?