Answer:
T = 5.66 s
Explanation:
The system formed by the bar plus ball forms a physical pendulum
w =
the moment of inertia of a rod held at one end is
I = m L²
we substitute
w =
in this case the turning distance and the length of the rod are equal
d = L
w =
angular velocity and period are related
w = 2π / T
2π / T =
T = 2π
let's calculate
T = 2π
T = 5.66 s
<span>I believe the that it is impossible for him to cover the whole room. Because SA of the room is 65.86 and the SA of a piece of paper is .0588.
And by multiplying it by 480 we get 28.24 and that what makes it impossible to cover the whole room.</span>
Answer:
Those parts have become vestigial
Explanation:
Organisms have few parts that are not useful to them because those parts in them have become vestigial.
When an organism has a part is no more using, it relates to the evolutionary history of such organism.
- These parts are called vestigial body parts.
- They are not needed for the survival of an organism again and they can do without them.
- At a certain point in time, those parts might be very vital to the sustenance of such organism.
- With time, those parts becomes useless and redundant.
Answer:
The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.
Explanation:
how long does it take sunlight to reach Earth? This sounds like a strange question, but think about it. Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes. If the Sun suddenly disappeared from the Universe (not that this could actually happen, don't panic), it would take a little more than 8 minutes before you realized it was time to put on a sweater.