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lisabon 2012 [21]
2 years ago
12

The purpose of fuses and circuit breakers is to

Physics
1 answer:
Elza [17]2 years ago
5 0

Answer:

Explanation:

Fuses and circuit breakers helps to:

protect equipment by stopping the flow of electric current; protect your house from fire

GFCI helps prevent electric shocks in a house:

GFCI outlets prevent electrocution if you are touching a wet appliance

Three 3ohms resistors in series would give you give a combined resistance of:

Resistance = (3+3+3)ohms = 9ohms

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Initial height: 66.5 m

Explanation:

The problem can be solved by using the principle of conservation of energy.

If we neglect air resistance, the total mechanical energy of the car is conserved during the fall, therefore we can write:

K_i + U_i = K_f + U_f

where :

K_i = 0 is the kinetic energy of the car at the top (it starts from rest)

U_i = mgh is the gravitational potential energy of the car at the top, with:

m = the mass of the car

g = the acceleration of gravity

h = the heigth of the car

K_f = \frac{1}{2}mv^2 is the kinetic energy of the car just before hitting the ground, with

v = 130 km/h final speed of the car

U_f = 0 is the gravitational potential energy of the car at the bottom

Re-arranging the equation,  we find

mgh=\frac{1}{2}mv^2

and we have:

g=9.8 m/s^2\\v = 130 km/h = 36.1 m/s

Solving for h, we find the initial height of the car:

h=\frac{v^2}{2g}=\frac{36.1^2}{2(9.8)}=66.5 m

Learn more about kinetic energy and potential energy:

brainly.com/question/6536722

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The first law of thermodynamics states that . Is this also a statement of the principle of conservation of energy?
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A projectile is shot from the edge of a cliff 80 m above ground level with an initial speed of 60 m/sec at an angle of 30° with
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Answer:

8 seconds

Explanation:

Answer:

Explanation:

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_____ helped to socially and politically unify the early byzantine empire by tolerating and even promoting christianity.
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