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Snowcat [4.5K]
3 years ago
12

A human being can be electrocuted if a current as small as 50 mA passes near the heart. An electrician working with sweaty hands

makes good contact with the two conductors he is holding, one in each hand. If his resistance is 2000 0, what might the fatal voltage be?
Physics
1 answer:
vaieri [72.5K]3 years ago
8 0

Answer:

Fatal voltage will be 1000 volt

Explanation:

We have given that current is very small as i=50 mA=50\times 10^{-3}A

Resistance is given as R = 20000 ohm

We have to find the fatal velotage

According to ohm's law

We know that voltage is given by V=iR

So fatal voltage will be V=50\times 10^{-3}\times 20000=1000volt

So fatal voltage will be 1000 volt

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What is the velocity of an 80 kg person skating across the ice with a kinetic energy of 16, 000 joules?
marysya [2.9K]

Answer:

V = 20 m/s

Explanation:

Given the following data;

Mass = 80kg

Kinetic energy = 16,000 joules

To find the velocity;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

K.E = \frac{1}{2}MV^{2}

Where;

K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

Substituting into the formula, we have;

16000 = ½*80*V²

16000 = 40V²

V² = 16000/40

V² = 400

Taking the square root of both sides, we have;

V = 20 m/s

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Whats it called when a force can change the shape of an object?
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If light moves at a speed of 299,792,458 m/s, how long will it take light to move a distance of 1,000 km
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