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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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20. Using the picture, how many neutrons does lithium have?

Igoryamba

Answer:

No. of Neutrons = 3

Explanation:

The atomic number of Lithium is given as 3 in the symbol while the mass number is given as 5.941 which is approximately equal to 6.

Mass Number = No. of Protons + No. of Neutrons = 6

Atomic Number = Number of Electrons = No. of Protons = 3

Therefore,

Mass Number - Atomic Number = (No. of Protons + No. of Neutrons) - No. of Protons

Mass Number - Atomic Number = No. of Neutrons

No. of Neutrons = 6 - 3

<u>No. of Neutrons = 3 </u>

8 0

3 years ago

Three capacitors (4.7, 6.5, and 15.5 F) are connected in series across a 50.0-V battery. Find the voltage across the 4.7-F capac

satela [25.4K]

Answer: 50 V

Explanation:

Given

Three capacitors are connected in parallel across 50 V battery

When capacitor are connected in parallel, net capacitance is the sum of all the values

Net capacitance

$\Rightarrow C=4.7+6.5+15.5\\\Rightarrow C=26.7\ F$

Voltage in parallel circuit is same across each capacitor. Therefore, voltage across 4.7 F capacitor is 50 V

6 0

3 years ago

31. Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction.

pochemuha

Answer:

F = 0.5 mN

Explanation:

The full solved solution is in the attach document.

6 0

3 years ago

A 36,287 kg truck has a momentum of 907,175 kg • . What is the truck’s velocity?

Drupady [299]

Given:
m = 36,287 kg, the mass of the truck
P = 907,175 (kg-m)/s, the truck's momentum.

Let v = the truck's velocity.
By definition, the momentum is
P = m*v
Therefore
v = P/m
= (907175 (kg-m)/s) / (36287 kg)
= 25 m/s

Answer: 25 m/s

7 0

3 years ago

Read 2 more answers

How many ohms of resistance must be present in a circuit that has 50 volts and a current of 2 amps.

Lady_Fox [76]

Answer:

25 ohms

Explanation:

Hi there!

Ohm's law states that $V=IR$ where V is voltage, I is current and R is resistance.