The source of energy that keeps the Sun shining today is _________.
<u>Is nuclear fusion</u>
~Hope this answers your question!~
The answer is
A. Yes, the obtained speed is less than the world record
The explanation:
when the obtained speed is 6 m /s
and the world record speed = distance / time = 100 m / 10 s = 10 m/s
So, Yes, the obtained speed is less than the world record
Not only is it less, its also a reasonable average speed for a somewhat athletic person. Therefore, the leap is entirely possible.
-Samuel Brady gained his lasting notoriety for his leap over the Cuyahoga River around 1780 in what is now Kent, Ohio. After following a band of Indians into the Ohio country, a failed ambush attempt resulted in the band chasing Brady near the Cuyahoga River. To avoid capture, Brady leaped across a 22-foot (6.7 m) wide gorge of the river (which was widened considerably in the 1830s for construction of the Pennsylvania and Ohio Canal) and fled to a nearby lake where he hid in the water under a fallen tree using a reed for air.
Answer:
5 m
Explanation:
30 m/s / 6.0 cycles/s = 5 m/cycle
Answer: a) 1.846m
b) 0.923m
Explanation: given that height h = 1.9m
Assume his eyes are 5.4 cm below the top of his head
5.4 cm = 5.4 / 100 = 0.054 m
1.9 – 0.054 = 1.846 meter
The top of the mirror should be placed at 1.846m
That is the vertical distance from his eyes to top of his head.
Light must travel from the top of his head to the mirror in order for him to see the head. Then travel from this position to his eyes. To do this, the mirror must be placed at a position that is halfway between his eyes and the top of his head.
The minimal vertical distance from the level of the person’s eyes to the top of the mirror will be:
d = ½ ×1.846 = 0.923 meters
