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omeli [17]
3 years ago
12

A charge of 12c passes through an electroplating apparatus in 2 min, what is the average current? ​

Physics
1 answer:
ryzh [129]3 years ago
8 0

Answer:

Explanation:

If I am not wrong

current = charge/time

All you have to take care of is the units should be in the same system

so

current = 12/(2*60)         ---------  2 min = 2*60 sec

current  = 12/120  = 0.1 amp

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A car horn emits a frequency of 400 Hz. A car traveling at 20.0 m/s sounds the horn as it approaches a stationary pedestrian. Wh
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Answer:

The observed frequency by the pedestrian is 424 Hz.

Explanation:

Given;

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The observed frequency is calculated as;

F_s = F_o [\frac{v}{v_s + v} ] \\\\

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F_s = F_o [\frac{v}{v_s + v} ] \\\\400 = F_o [\frac{340}{20 + 340} ] \\\\400 = F_o (0.9444) \\\\F_o = \frac{400}{0.9444} \\\\F_o = 423.55 \ Hz \\

F₀ ≅ 424 Hz.

Therefore, the observed frequency by the pedestrian is 424 Hz.

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