Answer:
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Explanation:
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Answer:
6.25×10^-11
Explanation:
The equilibrium charge = 2.4 - (2.3/2)
Equilibrium charge= 2.4 - 1.15= 1.25uc
Total charge= final charge - initial charge
Total charge= 1.25uc - 2.40uc= -1.15uc
Total charge transferred = -1.15 + 1.25 = 0.1uc
Number of electrons equivalent to 0.1uc= (0.1×10^-6)/-(1.6×10^-19)
Number of electrons = 6.25×10^-11 electrons
Answer:
d = 11.1 m
Explanation:
Since the inclined plane is frictionless, this is just a simple application of the conservation law of energy:
![\frac{1}{2} m {v}^{2} = mgh](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20m%20%7Bv%7D%5E%7B2%7D%20%20%3D%20mgh)
Let d be the displacement along the inclined plane. Note that the height h in terms of d and the angle is as follows:
![\sin(15) = \frac{h}{d} \\ or \: h = d \sin(15)](https://tex.z-dn.net/?f=%20%5Csin%2815%29%20%20%3D%20%20%5Cfrac%7Bh%7D%7Bd%7D%20%20%5C%5C%20or%20%5C%3A%20h%20%3D%20d%20%5Csin%2815%29%20)
Plugging this into the energy conservation equation and cancelling m, we get
![{v}^{2} = 2gd \sin(15)](https://tex.z-dn.net/?f=%20%7Bv%7D%5E%7B2%7D%20%20%3D%202gd%20%5Csin%2815%29)
Solving for d,
![d = \frac{ {v}^{2} }{2g \sin(15) } = \frac{ {(7.5 \: \frac{m}{s}) }^{2} }{2(9.8 \: \frac{m}{ {s}^{2} })(0.259)} \\ = 11.1 \: m](https://tex.z-dn.net/?f=d%20%3D%20%20%5Cfrac%7B%20%7Bv%7D%5E%7B2%7D%20%7D%7B2g%20%5Csin%2815%29%20%7D%20%20%3D%20%20%5Cfrac%7B%20%7B%287.5%20%5C%3A%20%20%5Cfrac%7Bm%7D%7Bs%7D%29%20%7D%5E%7B2%7D%20%7D%7B2%289.8%20%5C%3A%20%20%5Cfrac%7Bm%7D%7B%20%7Bs%7D%5E%7B2%7D%20%7D%29%280.259%29%7D%20%20%20%5C%5C%20%3D%2011.1%20%5C%3A%20m)
Answer:
What is quantum physics? Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.
Answer:
The barometer is supporting 75 cm of Hg due to atmospheric pressure.
Since the manometer is open to air pressure, the gas pressure is supporting the air pressure plus the 30 cm of Hg.
So the "absolute" gas pressure is 75 + 30 = 105 cm of Hg.