A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving at this spe
1 answer:
You might be interested in
Highest energy photon absorbed:
Explanation:
An atom is said to be (positively) ionised when it absorbs a photon, and as a consequence, an electron becomes energetic enough to escape the atom, leaving an excess of positive charge behind.
In order for the electron to escape, the energy of the absorbed photon must be exactly equal to the (negative) energy of the level in which the electron lies.
For an hydrogen atom, the energy levels are given by
where this energy is measured in electronvolts, and n is the number of the energy level.
Since the energy is negative, this means that the electron which requires most energy is the one lying in the ground state (n=1). Therefore, for an electron in the ground state, the most energy that can be absorbed from the incoming photon is
Converting into Joules, this is equal to
Learn more about hydrogen atom:
#LearnwithBrainly
Answer:
Explanation:
The time period of geosynchronous satellite must be equal to T .
The radius of its orbit will be ( R+ h )
orbital velocity V₀ =
Time period T = 2π( R + h ) / V₀
= 2π( R + h ) x
= R +h
h = - R.