Answer:
Explanation:
A ball is thrown vertically upward with a certain Kinetic Energy in the absence of air resistance and while returning it experiences air resistance.
Air resistance causes the ball to lose its kinetic energy as it provides resistance which will convert some of its kinetic energy to heat energy.
So in a way total energy is conserved but not kinetic energy as some portion of it is lost in the form of heat.
The two types of mechanical waves are longitudinal waves, and transversal waves.
Answer:
option E
Explanation:
given,
Parallax angle(d) = 1 arcsecond
using Parallax formula

p is the parsecs angle which is measured in 1 arcsecond
d is the distance in parsec
now,



we know,
1 parsec = 3.26 light year
hence, the answer will be option E