Answer:
68.2 Quadrillion meters
Explanation:
A lightyear is the distance that light travels in one year.
Speed of light is
So light covers 300,000,000 meters in one second.
One year has 31536000 seconds so , light covers
so 7.2 light years is
so 7.2 light years is
6.82 x 10^(16) meters or
68.2 Quadrillion meters
Answer:
h = 40.37 m
Explanation:
We will apply the law of conservation of energy to the skier in this case, as follows:
where,
m = mass of skier = 77 kg
g = acceleration due to gravity = 9.81 m/s²
vf = final speed = 30 m/s
vi = initial speed = 2 m/s
W_friction = Work done by friction and air resistance = 4000 J
Therefore,
<u>h = 40.37 m</u>