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3 years ago

Please hurry Describe why electric currents can be dangerous. *what causes it to happen in the circuit not biology**

Physics

2 answers:

Serjik [45]3 years ago

8 0

Answer:

Basically, the main risk is cardiac arrest, caused by the electric current interfering with the normal operation of the heart muscle. Other possible damages are burns due to the electric energy vaporizing the water inside the cells, and nerve damage caused by excessive current through the nerves.

The main hazards of working with electricity are:

Electric shock and burns from contact with live parts.

Injury from exposure to arcing, fire from faulty electrical equipment or installations.

Explanation:

saul85 [17]3 years ago

5 0

They can electrocute your to death and fry your brain

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Which two factors does the power of a machine depend on

azamat

Power in physics terms depends on both work and time because of the equation P=W/T

Hope this helps :D

8 0

3 years ago

Read 2 more answers

Flying plane

Fittoniya [83]

Answer

a. These are objects in motion that have kinetic energy.

Explanation:

5 0

3 years ago

Read 2 more answers

Note: the 2 in the answers are exponents

stiks02 [169]

Final speed after collision with the wall

$v_f = -0.4 m/s$

before collision the speed of ball initially

$v_i = 0.6 m/s$

time taken for the collision

$\Delta t = 0.2 s$

now as per the formula of acceleration we know that

$a = \frac{v_f - v_i}{\Delta t}$

now plug in all values in it

$a = \frac{-0.4 - 0.6}{0.2}$

$a = -5.0 m/s^2$

so acceleration is - 5 m/s/s for above situation

4 0

3 years ago

Which is true about inelastic collisions: a. An inelastic collision does not obey conservation of energy. b. An inelastic collis

Phoenix [80]

Answer:

Option c is correct

Explanation:

There are two types of collisions-elastic collision and inelastic collision.

In elastic collision, both kinetic energy and total momentum are conserved. On the other hand, in inelastic collision, total momentum is conserved but kinetic energy is not conserved. Thus, option b and d are incorrect.

Total energy is always conserved in both types. Thus, option a is incorrect.

In a perfectly inelastic collision, objects stick together. This happens because maximum kinetic energy is dissipated and used in bonding of the two objects. Thus, correct option is c.

5 0

4 years ago

A man (weighing 763 N) stands on a long railroad flatcar (weighing 3513 N) as it rolls at 19.8 m/s in the positive direction of

Burka [1]

Answer:

0.8m/s

Explanation:

Weight of mas,F=763 N

Mass of man= $\frac{F}{g}=\frac{763}{9.8}=77.86 kg$