Fluid friction is the kind of friction between the skydiver and the air.
<h3><u>Explanation:</u></h3>
Objects moving through fluid experience fluid friction or drag. A skydiver diving in air is an example of fluid friction since air as a medium is fluid and thus air molecules resists the falling motion of a body. Weight of the object due to gravity decides the acceleration of a skydiver when in flight and the resisting frictional force (drag), opposes it.
So, a resultant force acts and his velocity increases proportionally at first and then becomes a constant terminal value. The extent of fluid friction is dependent on the size of body as well as its speed. Larger the size more is the friction; higher the speed more is the friction.
Answer:
llogical or bizarre ideas or fantasies.
Explanation:
100cos30° + 80cos120° + 40cos233° + Dx = 0
<span>Dx = -22.53 N </span>
<span>y components: </span>
<span>100sin30° + 80sin120° + 40sin233° + Dy = 0 </span>
<span>Dy = -87.34 N </span>
<span>magnitude of D: </span>
<span>sqrt[(-22.53)² + (-87.34)²] </span>
<span>90.2 N </span>
<span>direction of D: </span>
<span>arctan[(-87.34)/(-22.53)] </span>
<span>75.5° ref, but since Dx and Dy are both negative, we know this vector is in QIV: </span>
<span>360 - 75.5° = 284.5°</span>
Answer:
the minimum thickness (in nm) t = 102.5 nm
Explanation:
t = thickness of the film
n = index of refraction = 1.61
m = order = 1
∝ = wavelength = 330 x 10-9 m
so we have the formula
2nt = m∝
2 (1.61) t = (1) (330 x 10-9)
then...
t = 1.025 x 10-7 m
converting...
t = 102.5 nm
Its B , the definition of cardiovascular endurance is <span>the ability of the heart, lungs and blood vessels to deliver oxygen to your body tissues.</span>