Answer: Option (a) is the correct answer.
Explanation:
Every atom consists of three sub-atomic particles which are protons, neutrons and electrons.
Inside the nucleus of an atom, there will be only protons and neutrons. Whereas electrons revolve around the nucleus of an atom.
Protons have a positive charge, neutrons have no charge and electrons have a negative charge.
Therefore, we can conclude that protons are the subatomic particles and each have a positive electrical charge.
Centripetal force is F=mv^2/r. So F=50(1.2^2)/16=4.5J
<span>The speed of sound is dependent on how close together the molecules of the transmitting medium is.</span>
When they meet the 40-kg boy will have moved a distance of 6 m.
Displacement of the 40 kg boy
The displacement of the 40 kg boy is calculated from the principle of center mass.
X(40 kg) = (60 x 10 m + 40 x 0)/(40 kg + 60 kg)
X(40 kg) = (600)/(100) = 6 m
X(60 kg) = (60 x 0 + 40 x 10 m)/(40 kg + 60 kg)
X(60 kg) = (400)/(100) = 4 m
Thus, when they meet the 40-kg boy will have moved a distance of 6 m.
Learn more about center mass here: brainly.com/question/13499822
#SPJ1
<span>The potential energy is mgh. The kinetic energy is (1/2)mv^2. Total mechanical energy means the sum of those. The velocity is 0 since its just hanging.
A 0.100-kilogram apple falls from a height of 1.50 meters to 1.00 meters. Ignoring frictional effects, what is the kinetic energy of the apple at this height? Its equal to the change in PE from 1.5 meters to 1.0 meters. PE = mgh.</span>