Answer:
d. kilometers per hour
Explanation:
Halley's comet is named after the astronomer Halley. This comet entered the inner solar system from the Kupier's belt. It is very large in size. It appears every 75 or 79 years in the inner solar system and can be seen with the naked eye. Its orbit is elliptical in shape. It reflects the sun light, otherwise it is entirely dark and made up of volatile material, as observed
(a) The angular speed of the rotation is 12.57 rad/s
(b) The period of the rotation is 0.5 s.
(c) The speed of the tip of your finger is 15.08 m/s.
<h3>Angular speed of the rotation</h3>The angular speed of the rotation is calculated as follows;
ω = 2πN
where;
ω = 2π x (2) = 4π = 12.57 rad/s
<h3>Period of rotation</h3>v = ωr
v = 12.57 x 1.2
v = 15.08 m/s
Learn more about angular speed here: brainly.com/question/6860269
Answer:
d. Its magnitude and its direction both remained the same.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.
This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.
In this scenario, a rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. Thus, the statement which correctly describes the momentum of the rubber ball is that its magnitude and its direction both remained the same because its velocity didn't change while returning to the thrower.