That is a paradox b/c stationary means not moving
Answer:
71 cm
Explanation:
The formula to apply here is θ = 1.22λ/D,
diameter of central maximum =1.0 cm
wavelength, λ= 633 nm
Diameter of pinhole = 0.11 mm
where θ = arc length/distance = s/R
s/R = 1.22λ/D
(.005)/R = (1.22)(633 X 10^-9)/(1.1 X 10^-4)
R = .71 m which is 71 cm
Answer:
The Spanish philosopher George Santayana wrote, “those who cannot remember the past are condemned to repeat it.” When it comes to climate change, repeating the past is a luxury we can’t afford. If partisan politics continues to derail policy or if denial continues to win over science, it will mean irreversible changes to our planet. Future generations will look at ours as the one that didn’t have the courage to act, rather than the one that recognized the fierce urgency of the moment and met it head on.
With this in mind, we’ve created a climate change timeline highlighting the evolution of science, the intrusion of denial, and the sluggishness of policy over the past 200 years. Let’s learn from the mistakes of the past, so we can make tomorrow a brighter—but not hotter—future.
In order for work to be done a force must be transferred and the object must move.
Answer:
constant acceleration
Explanation:
An object is said to be in free fall when only one force is acting on it: the force of gravity, which pushes the object towards the ground.
Newton's second law states that the resultant of the forces acting on an object is equal to the product between the mass of the object (m) and its acceleration:
(1)
for an object in free fall, there is only one force, the force of gravity:
![F=mg](https://tex.z-dn.net/?f=F%3Dmg)
where g = 9.8 m/s^2 is the gravitational acceleration. Substituting this into (1), we have
![mg=ma](https://tex.z-dn.net/?f=mg%3Dma)
and so
![a=g](https://tex.z-dn.net/?f=a%3Dg)
which means that the object is moving at constant acceleration downward, with acceleration equal to g = 9.8 m/s^2.