A useful formula that gives the free-fall distance from rest in 'T' seconds:
D = (1/2 G) x (T²)
G = 9.81 m/s²
1/2 G = 4.905 m/s²
D (5 seconds) = (4.905 m/s²) x (5 sec)²
= (4.905 m/s²) x (25 sec²)
= 122.625 meters .
Since the tower-top is 100m above ground,
the depth of the well, to the top of the water,
accounts for the additional 22.625 meters.
My question is: How do you know exactly when the stone hit the water ?
You probably stood at the top of the well and listened for the
sound of the 'plop'. But it took some time after the stone hit
the water for the sound of the plop to come back up to you.
Well, can't you just subtract that time ? Yes, but you need
to know how much time to subtract. That depends on the
depth of the well ... which is exactly what you're trying to
determine, so you don't know it yet.
Oh well. That's a deep subject.
KE = (1/2) (mass) (speed)²
KE = (1/2) (0.5 kg) (10 m/s)²
KE = (1/2) (0.5 kg) (100 m²/s²)
KE = (0.25 kg) (100 m²/s²)
KE = 25 Joules
Answer:
The slit separation is 2.2μm.
Explanation:
Given that,
Wavelength = 635 nm
Angle = 16.6°
Order number = 1
We need to calculate the slit position
Using formula of slit distance
Where, 
= wavelength
m = order number
Put the value into the formula
Hence, The slit separation is 2.2μm.
Answer: There are vast numbers of asteroids and comets.
Explanation:
There are clear patterns to the rotation and orbits of large bodies in the solar system.
There are a few notable "exceptions to the rules."
Planets fall into two major categories.
Answer:
Large quantities of fossil-fuel are needed to drive heavy agricultural equipment, processing food, refreeze food throughout transportation, manufacture packaging products, and manufacture and freight chemical supplies including fertilisers and pesticides.
Explanation:
Large quantities of fossil-fuel are needed to drive heavy agricultural equipment, processing food, refreeze food throughout transportation, manufacture packaging products, and manufacture and freight chemical supplies including fertilisers and pesticides. fossil duel rates also affect the cost of fertilizer and crop production material.
