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Alina [70]
2 years ago
12

A car drives at a constant speed of 45km in 20mn. The speed of the car is..?​

Physics
1 answer:
GarryVolchara [31]2 years ago
5 0

Answer:

83.8851 mi/h              

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Two conducting spheres are each given a charge Q. The radius of the larger sphere is three times greater than that of the smalle
padilas [110]

Answer:

Explanation:

If E₀ is the electric field outside the smaller sphere and r is the radius of larger sphere.

E₀ = kQ/r²

The radius of the larger sphere is 3r and the charge on both sphere is same then the electric field outside the larger sphere is given as

E = kQ/(3r)² = kQ/9r² = 1/9 (kQ/r²)= 1/9 x E₀

hence the correct option is e.

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3 years ago
How do you calculate the total resistance of a series circuit
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Add all the resistances across the circuit together the calculate the total resistance
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3 years ago
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Answer:

Explanation:

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2 years ago
As SCUBA divers go deeper underwater, the pressure from the weight of all the water above them increases tremendously which comp
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The problem is that a diver, experiences an increased pressure of water compresses nitrogen and more of it dissolves into the body. Just as there is a natural nitrogen saturation point at the surface, there are saturation points under water. Those depend on the depth, the type of body tissue involved, and also how long a diver is exposed to the extra pressure. The deeper a diver go, the more nitrogen the body absorbs.

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2 years ago
A quantum well is a region of semiconductor or metal film that confines particles to a small region, resulting in quantized ener
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226.2 m/sec

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We have given \Delta x=510nm=510\times 106{-9}m

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Mass of electron m=9.11\times 10^{-31}kg

Now according to Heisenberg uncertainty principle \Delta v\geq \frac{h}{2\pi m\Delta x}

So \Delta v\geq \frac{6.6\times 10^{-34}}{2\times 3.14\times 9.11\times 10^{-31}\times 510\times 10^{-9}}=226.2m/sec  

5 0
2 years ago
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