Answer:
W = 1493.9 J = 1.49 KJ
Explanation:
The work done by the elevator on the object will be equal to the gain in is potential energy:
W = ΔP.E
W = mgΔh
where,
W = Work = ?
m = mass of object = 7.4 kg
g = 9.8 m/s²
Δh = gain in height = 20.6 m
Therefore,
W = (7.4 kg)(9.8 m/s²)(20.6 m)
<u>W = 1493.9 J = 1.49 KJ</u>
<span>Bit level for a CCD (Charged coupled device) with a greatest possible pixel value of 4095:The relationship between the bit level and pixel value is given as:pixel value = 2^bit level.Most charged coupled devices (CCDs) have 8-bit, 16-bit, 32-bit levels.Using simple mathematics, we can see that 2^12 = 4096.Since the maximum number of pixels is 4095, the bit level is 12., i.e. the CCD has 12-bit level.</span>
In real machines, efficiency is always <em>less </em>than 100% .
Answer:
Explanation:
Friction literally helps us in ways we can't even think of. Without it I wouldn’t be able to hold my phone as easily as I am doing… Now coming to few other things that would have been impossible without friction are :
Sneezing and still staying in the same place.
Belt-pulley drive
Ease in normal walking
Holding a bottle for drinking water
Answer:
answer is C
Explanation:
acceleration is rate of changing velocity in a time