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3 years ago

A conducting sphere has a net charge of -4.8x10-17 C. What is the approximate number of excess electrons on the sphere?

Physics

1 answer:

Aloiza [94]3 years ago

7 0

Answer:

The number is $N = 300$

Explanation:

From the question we are told that

The net charge is $Q = -4.8 *10^{-17 } \ C$

Generally the charge on a electron is $e = - 1.60 *10^{-19 } \ C$

Generally the number of excess electrons is mathematically represented as

$N = \frac{Q}{e}$

=> $N = \frac{-4.8 *10^{-17}}{-1.60 *10^{-19}}$

=> $N = 300$

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3 years ago

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Correct question is;

A thermal tap used in a certain apparatus consists of a silica rod which fits tightly inside an aluminium tube whose internal diameter is 8mm at 0°C.When the temperature is raised ,the fits is no longer exact. Calculate what change in temperature is necessary to produce a channel whose cross-sectional is equal to that of the tube of 1mm. (linear expansivity of silica = 8 × 10^(-6) /K and linear expansivity of aluminium = 26 × 10^(-6) /K).

Answer:

ΔT = 268.67K

Explanation:

We are given;

d1 = 8mm

d2 = 1mm

At standard temperature and pressure conditions, the temperature is 273K.

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