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3 years ago

Which class of hard hats does not protect you from electrical shock?

Physics

2 answers:

3241004551 [841]3 years ago

8 0

Answer:

a. class c

Explanation:

The hard hats are certified by the American National Standards Institute (ANSI). The hard hats have to meet the ANSI Z89.1 specifications. The standard specifies the hard hat types and classes, performance requirements and design for various conditions and testing. There are three hard hat classes for electric shock protection

Class G 2200 Volts protection

Class E 20,000 Volts protection.

Class C which do not offer protection from electric shock

Sonja [21]3 years ago

6 0

The correct answer for this question is this one: "b. class e."

<span>The class of hard hats that does not protect you from electrical shock is Class E. This class is somewhat unstable and not really safe.</span>
Hope this helps answer your question and have a nice day ahead.

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butalik [34]

Answer:

time = 8.3333 minutes.

Explanation:

distance between earth and sun = 1.5 * $10^{8}km$

speed of light = 3* $10^{8}m/s$

convert the distance unit from km to m so we can have uniform units.

distance between earth and sun = 1.5 * $10^{8}*1000$ m

distance between earth and sun = 1.5 * $10^{11}$ m

speed = distance /time

time = distance / speed

time = $\frac{1.5*10^{11} }{3*10^{8} }$

$= 0.5*10^{3}$

time =500 sec

time = 500/60 minutes

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3 years ago

In this problem, you will calculate the location of the center of mass for the Earth-Moon system, and then you will calculate th

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Answer:

a) Option D is correct.

The center of mass between the Eartg and the moon is inside the Earth.

Explanation:

Given,

Mass of the moon = (7.35×10²²) kg

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Mass of the Sun = (2.00×10³⁰) kg

Distance between the Earth and the moon = (3.80×10⁵) km

Distance between the Earth and the Sun = (1.50×10⁸) km

With the assumption that all.of the bodies being considered are on the same straight line on the x-axis,

Note that Centre of mass is given as

C.M = (Σmx)/(Σm)

For the Earth-moon system, let the earth be x=0, then the moon is at x = (3.80 × 10 5) km away.

C.M = (Σmx)/(Σm)

Σmx = (6.00×10²⁴)) × (0) + (7.35×10²²) × (3.80×10⁵) = (2.793 × 10²⁸) kg.km

Σm = (6.00×10²⁴) + (7.35×10²²) = (6.0735 × 10²⁴) kg

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CM = (4.60 × 10³) km = 4600 km

This means the centre of mass is 4600 km from the Earth.

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Hence, the centre if mass is inside the Earth.

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allochka39001 [22]

Answer: Water can either increase or decrease the friction between surfaces.

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Answer:

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