Answer:
A meteor is B) an icy body with a long tail extending from it.
Explanation:
Meteors are very small dust particles that, when penetrating into the Earth's atmosphere, burn quickly by rubbing with the gases of the same. Some meteors, those with larger dimensions and appreciable weights, are brighter and can describe longer trajectories, showing longer.
In other words, the meteoroids, celestial bodies can vary in size between 100 micrometers up to 50 meters, they collide with the atmosphere of our planet and if the particles are of a small size, upon impact they enter combustion creating a flash, is what we know as meteor or shooting star. Therefore, the meteor is a luminous phenomenon that leaves behind a persistent trail.
So, <u><em>a meteor is B) an icy body with a long tail extending from it.</em></u>
The answer would be energy, because all wave emitters give off at least one type of energy....
Answer:
D. all atoms with an atomic number over 83
The final velocity of the man standing on roller skates with the ball caught, after it is thrown at him at a speed of 5 m/s, is 0.042 m/s.
The velocity of the man with the ball can be calculated by conservation of linear momentum:
Where:
: is the mass of the ball = 0.5 kg
: is the <u>mass</u> of the man = 59.5 kg
: is the initial velocity of the <u>ball</u> = 5 m/s
: is the <u>initial velocity</u> if the <u>man</u> = 0 (he is standing still)
: is the final velocity of the <u>ball</u> =?
: is the <u>final velocity</u> of the <u>man</u> =?
Since the man catches the ball, his final velocity is the same that the final ball's velocity, so:
Therefore, the velocity of the man with the ball is 0.042 m/s.
Learn more about the conservation of linear momentum here:
I hope it helps you!
