The 'spot' at the end of the laser beam moves in a circle. The radius of the circle is the distance between the laser and the spot.
The circumference of every circle is (2π) · (radius) .
The speed of the spot is (distance) / (time) .
Speed = (circumference) / (time to turn once around the full circle)
<u><em>Speed = </em></u>
<u><em>(circumference) · (nr of revs) / (second) .</em></u>
(a). Speed = (2π) (8km) · (9 rev) / sec
Speed = (2π · 8 · 9) km/sec
Speed = 144π km/sec
<em>Speed = 452.4 km/sec</em>
(b). Speed = (2π) (16km) · (9 rev) / sec
Speed = (2π · 16 · 9) km/sec
Speed = 288π km/sec
<em>Speed = 904.8 km/sec</em>
(c). 300,000 km/sec = (2π · distance) · (9 / sec)
300,000 km = (18π · distance)
Distance = 300,000 / 18π km
<em>Distance = 5,305 km</em>
6000 newtons is the right answer
Answer:
In coastal areas, strong winds and powerful waves break off soft or grainy rocks from hardier rocks. Too much weathering occurs, it might break off parts of the cliff and be dangerous to humans, or animals.
Rain has acid in it which could eat up the cliff.
Explanation:
Answer:
Ahhhhhh ano wala dito ang answer
A negative object so it takes in the charged object and nothing will happen until something else would touch it I think