Answer:
A very massive main- sequence star
Explanation:
Degeneracy pressure refers to pressure expend by dense material , which is composed of fermions, which is an example of electrons in a white dwarf star. According to Pauli exclusion principle, which states that no two fermions can exist in the same quantum state, actually give details about the pressure.
When there is stellar masses that is less than about 1.44 of that of solar masses, there will be gravitational fall in the energy , and the energy will not be sufficient to produce the neutrons of a neutron star, therefore, the fall is abstruptly stopped through the electron degeneracy to form white dwarfs.this result to the creation of an effective pressure that further prevents gravitational fall.
Answer: Light is a form of electromagnetic radiation because it has the ability to travel from one type of medium to another and can also carry some energy along with it. A light wave has two components, namely the electric field component as well as the magnetic field component that are both perpendicular to the propagating direction.
The visible light lies between the ultraviolet and the infrared lights, with wavelength from 400 nm to 700 nm respectively. This is collectively known as the visible spectrum of light.
Answer: 4.2 m
Explanation:
The time taken by the tennis ball to cover vertical displacement 1.30 m would be the same time in which ball would cover horizontal distance.
Initial velocity of the ball, u = 8.08 m/s in horizontal direction.
Initial velocity in the vertical direction is 0.
consider upward direction as positive and downward direction as negative. The ball free falls under gravity in the vertical direction.
Using the second equation of motion,
y = u t + 0.5 at²
⇒-1.30 m = 0 + 0.5 ×(-9.8m/s²) t²
⇒t = 0.52 s
There is no external force acting in the horizontal direction, thus horizontal distance covered is:
s = u t ⇒ s = 8.08 m/s × 0.52 s = 4.2 m
Thus, the tennis ball lands 4.2 m far away.
